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(isdn) primary rate interface test plan for customer premises

1. the unsolicited UA m CONTEST PRI Sends IUT Sends UA gt F 1 lt SABME S5 P 1 UA gt S7 0 F 1 or UA gt Ignore a ciu ILL UE B 9 3 2 2 Inopportune Frames TEST C_STATES 6 10 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends RNR gt Ignore P 0 RR gt F 1 DISC gt P 1 lt UA F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 74 July 1 1991 TEST STATES 6 11 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends RR gt S8 2 P 0 DISC gt P 1 lt UA HERR F 1 TEST C STATES 6 12 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends REJ gt S8 2 P 0 DISC gt P 1 lt UA 9 3 2 3 Invalid Frames TEST C STATES 6 13 Purpose Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option CONTEST PRI Sends IUT Sends lt FRMR F 0 lt SABME 55 P 1 UA gt 87 0 lt SABME 55 1 UA gt 57 0 F 1 is an undefined unrecognizable frame Copyright 1991 AT amp T All Rights Reserved Appendix B 75 July 1 1991 TEST C_STATES 6 14 Purpose Report the value of its V R CONTEST PRI Sends IUT Sends I with invalid N S gt P 1 lt RNR F 1 RR gt F 1 TEST C STATES 6 15 Purpose Initi
2. 0 lt SABME S5 P 1 gt 57 0 F 1 or I with Invalid N R gt P 0 lt SABME S5 P 1 UA gt 57 0 F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 44 July 1 1991 B 8 6 Receive Sequence Number Test Test M RCVSEQ ify IUT can Rotate the value of its Receive State variable V R within the proper range 0 127 All the tests in this section will execute the status check procedure described in Section B 7 Additionally the following preamble will also be executed PREAMBLE CONTEST PRI Sends IUT Sends RR gt P 1 lt RR uL Sial N R 0 Copyright 9 1991 AT amp T All Rights Reserved TEST M_RCVSEQ 1 Purpose Rotate the value of its Receive State variable V R within the CONTEST PRI Sends Appendix B 45 ps P 1N S 0 le P 1N S 1 gt P 1 N S 126 I gt P 1 N S 127 ios P 1N S 0 pass P 1N S 1 lnc IUT Sends lt RR F 1 N R 1 lt RR F 1 N R 2 lt RR F 1 N R 127 lt RR F 1 N R 0 lt RR F 1 N R 1 lt RR 1 N R 2 Copyright 1991 AT amp T All Rights Reserved July 1 1991 nas range 0 127 B 8 7 Timers Test M_TIMER 1 All the tests in this section will execute the status check procedure described in Section B 7 B 8 7 1 Timer T200 TEST M_TIMER 1 Appendix B 46 Perform proper T200 time
3. Pulse Density Test Operational Test B8ZS Test 64 kb s Clear Channel Capability Test Delay Tolerance Test Inband Loopback Test Input Jitter Tolerance Test Output Jitter Test Transfer Jitter Test DACS Compatibility Test Superframe Synchronization Test Synchronization Tests 17 1 Holdover or Free Run Accuracy Test 17 2 Clock Pull in Range 17 3 Time Interval Error Tests DS 0 Channelization Test A and B Bit Signaling Test Alarm Test Minimum Acceptable Performance Test Digital Error Performance Test Very Severe Burst Error Test ATTACHMENT 2 ACCUNET ESF Compatibility Test Procedure 1 Introduction Copyright 9 1991 AT amp T All Rights Reserved vid ND pt e Ro D D D ONA OA OA Un A Un G A FP Pj LH Part I Frame Structure Tests 2 1 Framing Test 2 2 CRC Test Part Maintenance and Alarm Tests 3 1 Yellow Alarm 3 2 Alarm Indication AS Be Signal 3 3 Loopbacks Part III Protocol Tests 5 Part IV Parameter Collection and Tests 51 ES UAS Test 5 2 Errored ESF Count Test 5 3 Bursty Errored Seconds BES Count T est 5 4 Severely Errored Seconds SES Count Test 5 5 Loss of Frame Count LOFC Test 5 6 Controlled Slip Seconds CSS Count Test Part V Maximum Error Check Test C O0 OO GO mi Copyright 1991 A
4. gt Ignore F 1 DISC gt P 1 lt UA F 1 reer een erred Copyright 1991 AT amp T All Rights Reserved Appendix B 72 July 1 1991 TEST C_STATES 6 4 Purpose Acknowledge valid I frame update its receive state variable V R CONTEST PRI Sends IUT Sends 1 gt P 1 lt RNR F 1 RR gt F 1 TEST STATES 6 5 Purpose Respond to supervisory inquiry but don t clear timer recovery condition until get response to its outstanding supervisory command CONTEST PRI Sends IUT Sends RR gt P 1 lt RNR S8 2 F 1 RR gt F 1 TEST C_STATES 6 6 Purpose Respond to supervisory inquiry but don t clear timer recovery condition until get response to its outstanding supervisory command CONTEST PRI Sends IUT Sends RNR gt P 1 lt RNR F 1 RR gt Fst TEST C STATES 6 7 Purpose Respond to supervisory inquiry but don t clear timer recovery condition until get response to its outstanding supervisory command CONTEST PRI Sends IUT Sends REJ gt P 1 lt RNR S8 2 F 1 RR gt Fan Copyright 1991 AT amp T All Rights Reserved Appendix B 73 July 1 1991 TEST C_STATES 6 8 Purpose Initiate re establishment CONTEST PRI Sends IUT Sends FRMR gt F 1 lt SABME S5 P 1 UA gt 57 0 F 1 TEST 8 8 6 9 Purpose Initiate re establishment upon receipt of unsolicited UA
5. gt P 1 Ignore DISC gt P 1 lt DM le u a Copyright 1991 AT amp T All Rights Reserved Appendix B 57 July 1 1991 9 2 Awaiting Release State S6 These tests included for TUT which be configured to send DISC frames Since it is not required that IUT support this feature these tests optional However if this feature has been implemented these tests are mandatory I M Test C_STATE6 13 14 NE 1h Lu s c Ignore errored I frames don t initiate error recovery in a state where multiple frame operation is not possible Transition into TEI Assigned State and stop timer T200 Report that link is in a state such that multiple frame operation is not possible Acknowledge the DISC in order to permit its peer to disconnect the data link Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option or ignore All the tests in this section will execute the status check procedure described in Section B 7 Additionally the following preamble will also be executed PREAMBLE CONTEST PRI Sends IUT Sends lt DISC S6 P 1 The S denotes the state the TUT will be in after sending this frame Copyright 9 1991 AT amp T All Rights Reserved Appendix B 58 July 1 1991 B 9 2 1 Valid Frames TEST C_STATE6 1 Purpose Transition int
6. 1991 AT amp T All Rights Reserved Appendix B 14 July 1 1991 All the tests in this section will execute the status check procedure described in Section B 7 These tests do not require preamble B 8 2 1 Valid Frames TEST M_STATE7 0 1 Purpose Restart the data link when already in multiple frame operation mode CONTEST PRI Sends IUT Sends SABME gt P 1 lt UA F 1 TEST M_STATE7 0 2 Purpose Disconnect the data link CONTEST PRI Sends IUT Sends DISC gt P 1 lt UA S4 t F 1 TEST M_STATE7 0 3 Purpose Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore it ey a PE a RO GG C ECL Acc ue Me CONTEST PRI Sends IUT Sends DM gt F 1 lt SABME S5 P 1 UA gt F 1 gt x or DM gt Hgnore F 1 DISC gt P 1 es f The S denotes the new state the IUT will be in after sending this frame Copyright 9 1991 AT amp T All Rights Reserved Appendix 15 TEST M_STATE7 0 4 Purpose Acknowledge receipt of a valid Information frame gt CONTEST PRI Sends IUT Sends gt P 1 lt RR i F 1 TEST M_STATE7 0 5 Purpose Respond to a normal status check of the data link CONTEST PRI Sends IUT Sends RR gt 1 lt U _ F 1 TEST STATE7 0 6 Purpose Report that it is not in an own receiver busy condition CO
7. to the expected frame if any The following is the list of the states which are tested 5 Awaiting Establishment State establishment process has been started but not completed Multiple Frame Established Normal State multiple mode of information transfer has started 57 1 Multiple Frame Established Reject State reject condition a 58 4 Timer Recovery Normal Peer Receiver Busy State timer T200 has expired 58 5 Timer Recovery Reject Peer Receiver Busy State reject condition S4 TEI Assigned State acknowledged information transfer is not possible S6 Awaiting Release State link release procedure has started Multiple Frame Established Busy State busy condition in multi frame state Timer Recovery Peer and Own Receiver Busy State local busy condition causing timer T200 to expire In addition to the above tests Layer 2 tests also verify the implementation of proper rotation of frame sequence numbers address checking and proper handling of parameters such as timers and window size 2 3 Layer 3 Layer 3 tests verify the conformance of the IUT to the procedures as specified in TR 41449 and 41459 This is done by evaluating the response if any of the IUT upon receipt of one of the following messages i Valid messages These are Q 931 messages that are syntactically valid and are sent to the IUT in the correct state ii Inopportune messages These a
8. RR F 1 N R 0 lt I N S 0 lt N S 1 lt N S 2 RR gt F 0 N R 3 I N S 3 lt I N S 4 lt I N S 5 lt I N S 6 lt 1 N S 7 lt I N S 8 lt 1 N S 9 RR gt F 0 N R 10 2 TEST C_SNDSEQ 2 Purpose Transmit only k I frames without acknowledgement 5 CONTEST PRI Sends IUT Sends RR gt P 1 N R 0 lt 1 N R 0 lt N S 0 lt I N S 1 lt T N S 2 lt N S 3 lt N S 4 lt T N S 5 lt N S 6 Do Nothing lt RR P 1 RR gt F 1 N R 7 Copyright 1991 AT amp T All Rights Reserved Appendix B 78 July 1 1991 TEST C_SNDSEQ 3 Purpose Retransmit I frames starting with the I frame indicated by the N R contained in the REJ frame CONTEST PRI Sends IUT Sends RR gt P 1 N R 0 lt RR 1 N R 0 lt I N S 0 lt I N S 1 lt 1 N S 2 REJ gt P 1 N R 1 lt RR F 1 lt I N S 1 lt N S 2 RR gt lt 1 Copyright 1991 AT amp T Rights Reserved Appendix B 79 July 1 1991 B 9 5 Handling UI XID Frames the tests in this section will execute the status check procedure described in Section B 7 Additionally each subsection identifies the preamble that will be executed B 9 5 1 Basic Capabilities These tests are included for an IUT which supports the procedure for unimplemented frames that is specified in TR
9. TEST M_STATE7 1 4 Purpose Acknowledge receipt of a valid Information frame and transition into normal multiple frame operation mode CONTEST PRI Sends IUT Sends lt RR S7 0 TEST M_STATE7 1 5 Purpose Respond to a normal status check of the data link and report its current V S and V R values CONTEST PRI Sends IUT Sends RR gt P 1 TEST M_STATE7 1 6 Purpose Report that it is not in an own receiver busy condition CONTEST PRI Sends IUT Sends RNR gt P 1 lt RR S7 5 F 1 RR gt P 0 TEST M_STATE7 1 7 Purpose Report its current V R value CONTEST PRI Sends IUT Sends REJ gt P 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 27 TEST M_STATE7 1 8 Purpose Initiate re establishment knowing that retransmission of the frame will not clear an error condition CONTEST PRI Sends IUT Sends FRMR gt F 1 lt SABME S5 P 1 UA gt S7 0 F 1 TEST M STATE7 1 9 Purpose Initiate re establishment upon receipt of an unsolicited UA or ignore the unsolicited UA CONTEST PRI Sends IUT Sends UA gt F 1 lt SABME 55 P 1 UA gt S7 0 F 1 or UA gt Ignore Did ER ee E dai B 8 3 2 Inopportune Frames TEST M_STATE7 1 10 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends RNR gt S7 5 P 0 RR gt 57 1 P 0 DISC gt P 1 Nn Copy
10. P 1 TEST C_STATE4 10 Purpose Ignore inopportune frames CONTEST PRI Sends FRMR gt F 0 DISC gt P 1 IUT Sends IUT Sends Hgnore lt DM IUT Sends Ignore DM F 1 CONTEST PRI Sends IUT Sends Ignore lt DM F 1 Ignore lt DM F 1 Copyright 1991 AT amp T All Rights Reserved July 1 1991 Appendix B 53 TEST C_STATE4 11 Purpose Ignore inopportune frames CONTEST PRI Sends gt 0 DISC gt P 1 TEST STATE4 12 Purpose Ignore inopportune frames CONTEST PRI Sends RNR gt P 0 DISC gt P 1 TEST C_STATE4 13 Purpose Ignore inopportune frames CONTEST PRI Sends RR gt P 0 DISC gt P 1 IUT Sends IUT Sends Ignore lt DM F Hgnore IUT Sends Hgnore Copyright 9 1991 AT amp T All Rights Reserved July 1 1991 Appendix B 54 July 1 1991 B 9 1 3 Invalid Frames TEST C_STATE4 14 Purpose Ignore frame with undefined control bit field CONTEST PRI Sends IUT Sends XX gt Ignore DISC gt P 1 lt DM 1 TEST C_STATE4 15 Purpose Ignore errored I frames with poll bit not set H CONTEST PRI Sends IUT Sends I with invalid N S gt Hgnore P 0 DISC gt P 1 lt F 1 TEST C_STATE4 16 Purpose Ignore errored I frames with poll bit not set CONTEST PRI Sends IUT Sends
11. P 1 lt UA F 1 Do Nothing T203 expires lt RR S8 0 P 1 RR gt TEST M_TIMER 5 Timer expiry recovery procedures in which it will stop timer T203 after its first expiry and start timer T200 CONTEST PRI Sends IUT Sends SABME gt P 1 lt UA 1 Do Nothing T203 expires lt RR P 1 Do Nothing T200 expires lt RR 58 0 P 1 RR gt Vl eae eee Copyright 1991 AT amp T All Rights Reserved Appendix B 49 July 1 1991 B 9 CONDITIONAL TESTS This section contains test cases for optional data link procedures or additional capabilities The tests will be selected based the capabilities of the IUT The exact criterion for selection is indicated at the beginning of each group B 9 1 TEI Assigned State S4 These tests are included for an TUT which can be configured to remain in TEI Assigned State long enough for testing purposes approximately 2 seconds Since this is not a required capability these tests are optional However if this feature has been implemented these tests are mandatory Purpose of Test Test C_STATE4 Verify IUT 1 Transition into Multi Frame Established State if able 2 Acknowledge that data link is already disconnected 17 3 Report that data link is disconnected non acknowledgement of I frame or by ignoring it Report status in a disconnected mode and not ready to receive I frames 4 5 Report status in a disconnect
12. or ignore the unsolicited UA 10 12 Ignore inopportune frames 13 Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option 14 Report the value of its V R 15 Initiate re establishment upon receipt of an invalid N R value the FRMR _ _ is an implementation option All the tests in this section will execute the status check procedure described in Section B 7 Additionally the following preamble will also be executed PREAMBLE CONTEST PRI Sends IUT Sends RNR gt lt RNR 57 6 Do Nothing T200 expires B 9 3 2 1 Valid Frames The S denotes the new state the UT will be in after sending this frame Copyright 9 1991 AT amp T All Rights Reserved Appendix B 71 July 1 1991 TEST C_STATES 6 1 Purpose Re establish the data link and transition into multiple frame established mode clearing own receiver busy and reject exception conditions CONTEST PRI Sends IUT Sends SABME P 1 lt UA S7 0 t F 1 TEST C STATES8 6 2 Purpose Disconnect the data link z CONTEST PRI Sends IUT Sends DISC gt P 1 lt UA S4 F 1 TEST C STATES 6 3 Purpose Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore CONTEST PRI Sends IUT Sends DM gt F 1 lt SABME S5 P 1 UA gt 57 0 F 1 222 522 gt or DM
13. 17 Ignore UI frames in S8 6 18 Ignore XID frames in S8 6 me PREAMBLE _ CONTEST PRI Sends IUT Sends RNR gt lt RNR 87 6 Do Nothing T200 expires lt RNR S8 6 T TEST C UIXID 17 Purpose Ignore UI frames in S8 6 _ CONTEST PRI Sends IUT Sends UI gt Ignore DISC gt 1 lt F 1 TEST C_UIXID 18 Purpose Ignore XID frames in S8 6 CONTEST PRI Sends IUT Sends XID gt Ignore DISC gt P 1 lt UA S4 F 1 f The S denotes the new state the IUT will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved
14. B4 23 C CA 5 6 B5 1 C NCTSC 1 COR doe ca B5 2 C NCTSC2 5 3 CC NCTSC R 1 IBS 4 C NCTSC 3 _JCC_NCTSC_R2 B5 5 Dropped Bs 6 C_NCTSC 4 JB5 7 C_NCTSC 5 5 8 CNCTSC6 5 9 C_NCTSC 7 B5 10 CC_NCTSC_F 1 SCO NETIC FI B5 11 Dropped B6 1 1 Dropped 2 1 C_MSGLEN 1 6 2 2 C_MSGLEN 2 dL 5 AT amp T ISDN PRI CAPABILITIES NOT COVERED BY THIS TEST PLAN This test plan does not verify whether the TUT uses end user information carried as user to user information appropriately It also does not verify the interactions between the procedures taking place on the PRI interface and those that take place at the interface between the IUT and its supported devices This test plan does not address performance parameters like load handling 6 TESTING REQUIREMENTS ON IUT Testing in accordance with this test plan requires that the IUT be able to disable or relax some of the protocol requirements during testing In particular Copyright 1991 AT amp T All Rights Reserved 8 July 1 1991 e during Layer 2 testing the IUT must disable Layer 3 operation e during Layer 3 testing the IUT must be able to expand or disable Layer 3 timers at the IUT Also the vendor must provide the necessary equipment for accessing supported services and features 7 TESTING PROCESS Testing agreements between a vendor and AT amp T Development Relations Group DRG initiate the
15. DS 1 bandwidth except for the framing bits and will not have any particular relationship to the constituent time slots into which a DS 1 carrier is normally divided The QRTS source will use Alternate Mark Inversion AMI line coding without Zero Code Suppression ZCS B8ZS is not allowed SF framing must be used No alternative test signal is acceptable To measure the input jitter tolerance the IUT is required to loop time off the test signal Sinusoidal jitter is impressed on the test signal at various frequencies The level of applied jitter at which the IUT can no longer recover the test signal without errors is the IUT s input jitter tolerance A mechanized means of detecting the onset of errors is useful for ISDN equipments Typically we can detect the onset of errors using one of the following methods 1 The IUT loops the input signal back to the interface where it was applied The loop back must be implemented within the TUT at a point beyond the signal recovery and clock recovery circuits Although the framing bits may be shifted in the output signal the remaining 192 bits in each frame should be unaltered This implies that a the IUT must loop all 24 of the constituent channels back b the TUT must impose equal delay on each of the 24 constituent channels and c the IUT must not employ Zero Code Suppression ZCS digital loss or any other mechanism which may alter the integrity of the data Any errors detected in the output
16. Ignore inopportune frames CONTEST PRI Sends RNR gt P 0 RR gt F 1 DISC gt 1 TEST 8 8 5 12 Ignore inopportune frames CONTEST PRI Sends RR gt P 0 DISC gt P 1 TEST 8 8 5 13 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends REJ P 0 DISC gt P 1 B 8 5 3 Invalid Frames IUT Sends Ignore lt UA F 1 IUT Sends 58 1 58 1 lt UA F 1 Copyright 1991 AT amp T All Rights Reserved July 1 1991 Appendix B 42 July 1 1991 TEST M_STATES 5 14 Purpose Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option CONTEST PRI Sends IUT Sends XX lt FRMR F 0 lt SABME 55 P 1 UA gt S7 0 F 1 or gt lt SABME 55 P 1 UA gt 57 0 F 1 TEST 5 8 5 15 Purpose Report the value of its V R reject condition is already set CONTEST PRI Sends IUT Sends I with invalid N S gt P 1 XX is an undefined unrecognizable frame Copyright 1991 AT amp T All Rights Reserved Appendix B 43 July 1 1991 TEST M STATES 5 16 Purpose Initiate re establishment upon receipt of an invalid N R value the FRMR is an implementation option CONTEST PRI Sends IUT Sends I with Invalid N R gt P 0 lt
17. PRI Sends IUT Sends DM gt F 1 lt SABME S5 P 1 UA gt S7 0 F 1 or DM gt Hgnore F 1 DISC gt P 1 lt UA F 1 TEST C_STATE7 2 4 Purpose Discard received I frame after updating its acknowledge state variable V A respond with RNR CONTEST PRI Sends IUT Sends gt 1 Copyright 1991 amp Rights Reserved Appendix B 66 July 1 1991 TEST C STATE7 2 5 Purpose Process all received supervisory frames updating its acknowledge state variable V A respond with RNR CONTEST PRI Sends IUT Sends TEST C STATE7 2 6 Purpose Process all received supervisory frames updating its acknowledge state variable V A respond with RNR CONTEST PRI Sends IUT Sends RNR gt P lt RNR 57 6 F 1 RR gt TEST C_STATE7 2 7 Purpose Process all received frames updating its acknowledge state variable V A respond with RNR CONTEST PRI Sends IUT Sends REJ gt P 1 TEST C_STATE7 2 8 Purpose Initiate re establishment and clear its own receiver busy condition CONTEST PRI Sends IUT Sends FRMR gt F 1 SABME 5 P 1 UA gt 57 0 ___ Copyright 1991 AT amp T All Rights Reserved Appendix B 67 July 1 1991 TEST C STATE7 2 9 Purpose Initiate re establishment upon receipt of an unsolicited UA or ignore
18. T All Rights Reserved Appendix B 30 July 1 1991 B 8 4 Timer Recovery Normal Peer Receiver Busy State S8 4 Test M STATES 4 1 Re establish the data link and transition into multiple frame established mode Disconnect the data link 3 Exit timer recovery procedure and transition into multiple frame established TUNING cs ETE 4 Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore 5 Acknowledge a valid I frame update its receive state variable V R 6 8 Set its V A to the value N R transmit an RR response 9 Initiate re establishment 10 Initiate re establishment upon receipt of an unsolicited UA or ignore the unsolicited UA 1143 Ignore inopportune frames M M H M M M nd Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option Initiate re establishment upon receipt of a frame with a long RR frame the FRMR is an implementation option Initiate re establishment upon receipt of an invalid N R value the FRM is an implementation option Reject an I frame with an invalid N S and report the value of its V R R All the tests in this section will execute the status check procedure described in Section B 7 Additionally the following preamble will also be executed PREAMBLE CONTEST PRI Sends IUT Sends RNR gt 1 lt RR F 1 Do Nothi
19. UI gt DISC gt P 1 TEST C UIXID 4 Purpose Ignore XID frames in S7 0 CONTEST PRI Sends XID gt DISC gt P 1 July 1 1991 IUT Sends Ignore IUT Sends Ignore lt UA F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 82 B 9 5 1 3 Multiple Frame Established Reject State S7 1 PREAMBLE CONTEST PRI Sends I with invalid N S gt TEST C UIXID 5 Purpose Ignore UI frames in S7 1 CONTEST PRI Sends Ul gt DISC gt P 1 TEST C_UIXID 6 Purpose Ignore XID frames in 57 1 SSS a LAU CONTEST PRI Sends XID gt DISC gt P 1 t The S denotes the new state the IUT will be in after sending this frame IUT Sends IUT Sends Ignore UA F 1 L unga uuu IUT Sends Hgnore lt UA S4 0 Copyright 1991 AT amp T i AH Rights Reserved July 1 1991 Appendix B 83 B 9 5 1 4 Timer Recovery Normal Peer Receiver Busy State S8 4 PREAMBLE TEST C UIXID 7 CONTEST PRI Sends IUT Sends RNR gt P 1 lt RR F 1 Do Nothing T200 expires lt RR 58 4 t P 1 Purpose Ignore UI frames in S8 4 TEST 8 CONTEST PRI Sends IUT Sends UL gt Ignore DISC gt P 1 lt UA CONTEST PRI Sends IUT Sends XID gt Ignore DISC gt P 1 lt UA RM LI t S denot
20. an aid for checking and debugging PRI protocol implementations This capability is facilitated by a remote test unit called CONTEST RTU Appendix D contains the user s manual for this unit Remote testing is not equivalent to on site compatibility testing testing of Layer 1 procedures and certain aspects of testing of Layers 2 and 3 procedures are not supported remotely Nevertheless successful completion of remote testing will significantly enhance the probability that an TUT will successfully complete the full suite of ISDN PRI tests when it undergoes on site testing of Layers 2 and 3 procedures 4 DIFFERENCES WITH THE 1989 TEST PLAN The AT amp T ISDN PRI test plan has been updated to incorporate new procedures added to the call control protocol to access additional capabilities and features provided by the network Additional tests have been included to enhance the testing capability Finally Layer 2 and Layer 3 tests have been rearranged according to the functions of the protocol and network provided services and features This regrouping will make it easier to select the tests for a given IUT based on the services and features it supports 4 1 Physical Layer There are no changes to the physical layer tests However the presentation of information is different 4 2 Layer 2 The changes in Layer 2 tests are minimal 1 State numbers have been aligned with the CCITT Recommendation 921 2 Test 11 in Section 5 of the 1989 Version has
21. frame sequence numbers address checking and proper handling of parameters such as timers and window size At the data link layer TR 41449 and TR 41459 specify a subset of the Q 921 LAPD protocol Procedures in Q 921 which pertain to automatic Terminal Endpoint Identifier TEI management are not used Therefore Q 921 states S1 S2 and S3 will not exist and hence no tests are provided for these states Also UI and XID frames are not supported on a PRI interface and therefore must be ignored by the IUT B 2 ORGANIZATION What follows is a description of terminology used in this appendix an explanation of the presentation of the scripts conditions for selection of tests that will be executed followed by the Layer 2 scripts themselves B 3 GLOSSARY OF TERMS CONTEST PRI CONformance TEST system for PRI DISC Disconnect frame DM Disconnect Mode frame FRMR Frame Reject frame I Information frame IUT Implementation Under Test PRI Primary Rate Interface REJ Reject frame RNR Receiver Not Ready frame RR Receiver Ready frame SABME Set Asynchronous Balance Mode Extended frame SAPI Service Access Point Identifier TEI Terminal End point Identifier UA Unnumbered Acknowledgement frame UI Unnumbered Information frame XID eXchange IDentification frame XX undefined unrecognizable frame B 4 DESCRIPTION OF SCRIPT PRESENTATION The Layer 2 test scripts are divided into 21 test groups with several individual tests contained in each tes
22. of the ESF compatibility test 5 Reframe Time Test It is desirable that the CPE regains framing synchronization within 50 msecs This test determines if the CPE reframes in that time frame on the incoming DS 1 signal 6 Pulse Density Test Long sequences of digital zeroes or signals with a high density of zeroes transmitted from CPE may create synchronization losses within the network Hence CPE are restricted in the number of consecutive zeroes they may transmit This test determines whether the amount of zeroes transmitted by the CPE exceed Technical Reference 62411 requirements 7 Operational Test The pulse characteristics of the signal from the customer s CPE to the network must be such that it will provide sufficient drive and stability to the network This test determines whether the CPE output signal does provide sufficient drive and stability to the network and that the CPE s output signal can be recovered and regenerated by the network s first line repeater 8 875 Test AT amp T is committed to converting the network to support B8ZS to ensure sufficient pulse density to maintain network stability This test is made to determine if the CPE will properly encode decode or transmit without changing the B8ZS symbol 3 Older documents refer to Superframe Format SF framing and formatting as D3 D4 or D3 D4 Copyright 1991 AT amp T All Rights Reserved Appendix A 5 July 1 1991 9 64 kb s Clear Channel Cap
23. re establishment upon receipt of an unsolicited UA or ignore the unsolicited UA s 10 12 Ignore inopportune frames Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option Initiate re establishment upon receipt of a frame with a long RR frame the FRMR is an implementation option 15 Initiate re establishment upon receipt of a frame with a long SABME frame the FRMR is an implementation option 16 Initiate re establishment upon receipt of a frame with a long DISC frame the FRMR is an implementation option 17 Reject an I frame with an invalid N S and report the proper value of its V R 18 Initiate re establishment upon receipt of an invalid N R value the FRMR MS is an implementation option f 19 Initiate re establishment upon receipt of an I frame with invalid N S and N R IUT response to the I frame depends on the order in which the N S and N R are checked FRMR and REJ are both implementation options 20 Ignore a command frame that is too short while in multiple frame established state 21 Ignore a frame with a non zero TEI while in multiple frame established State 22 Ignore a frame with a non zero SAPI while in multiple frame established state 23 Reject a command frame with an improper C R bit initiate reestablishment of data link Copyright
24. testing process As part of the agreement the vendor will receive a copy of this test plan and a vendor questionnaire The information gathered from this will be used in designing the tests specific to the vendor s product Upon the receipt of the completed questionnaire DRG will schedule for remote if requested and on site testing sessions for the CPE The final preparation includes a conference call between DRG test engineers and the vendor During this meeting any last minute details on both the logistical and technical matters will be reviewed During testing it may be necessary to make modifications or adjustments to the vendor s equipment Hence it is necessary that a vendor representative be present during on site testing At the successful completion of a test session a test report will be generated which will be reviewed at AT amp T Bell Laboratories The vendor is provided with a copy of the report A survey form is attached to the report which will be used by DRG in its continuing goal of improving the quality of the testing process 8 SUMMARY The AT amp T ISDN PRI testing program as with other AT amp T testing programs is part of AT amp T s objective of supporting vendors to build CPEs compatible with AT amp T Switched Network interfaces Vendors can contact DRG for help in interpreting the interface specifications and the test plan AT amp T Bell Laboratories will be consulted as needed Copyright 1991 AT amp T Al
25. 1 TEST 8 7 2 15 Purpose Initiate re establishment upon receipt of an invalid N R value the FRMR is implementation option _ CONTEST PRI Sends IUT Sends I with invalid N R gt P 0 lt FRMR F 0 lt SABME 55 1 UA gt S7 0 F 1 or I with invalid N R gt P 0 lt SABME S5 P 1 UA gt 57 0 F 1 nr TORRE RE Copyright 9 1991 AT amp T All Rights Reserved Appendix B 70 July 1 1991 B 9 3 2 Timer Recovery Peer and Own Receiver Busy State S8 6 These tests are included for an TUT which can be configured to send RNR frames Since it is not required that an IUT support this feature these tests are optional However if this feature has been implemented these tests are mandatory IUT Re establish the data link and transition into multiple frame established mode clearing own receiver busy and reject exception conditions _ rt ea ee Sui 2 Disconnect the data link 3 Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore E 4 Acknowledge valid I frame update its receive state variable V R 5 7 Respond to supervisory inquiry but don t clear timer recovery condition until get response to its outstanding supervisory command 8 Initiate re establishment 9 Initiate re establishment upon receipt of an unsolicited UA
26. 1 Purpose Ignore UI frames in S4 CONTEST PRI Sends IUT Sends UI gt Hgnore P 0 DISC gt 1 lt DM F 1 TEST C_UIXID 12 Purpose Ignore XID frames in S4 CONTEST PRI Sends IUT Sends XID gt Hgnore P 0 DISC gt P 1 DM PR RR LS t S denotes the new state the TUT will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved Appendix B 86 July 1 1991 B 9 5 3 Awaiting Release State S6 These tests are included for an IUT which supports the procedure for unimplemented frames that is specified in TR 41449 Since it is not required that an IUT support this procedure these tests are optional However if this procedure has been implemented and if the TUT can send a DISC frame on demand these tests are mandatory Test C_UIXID PREAMBLE CONTEST PRI Sends IUT Sends lt DISC S6 t pl TEST UIXID 13 Purpose Ignore UI frames in S6 CONTEST PRI Sends IUT Sends gt Ignore UA gt S4 F 1 DISC gt P 1 DM F 1 TEST C UIXID 14 Purpose Ignore XID frames in S6 CONTEST PRI Sends IUT Sends XID gt Ignore UA gt S4 F 1 DISC gt P 1 lt DM L F 1 The S denotes the state the IUT will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved Appendix B 87 July 1 1991 B 9 5 4 Multiple Frame Established Busy
27. 111 A specification of the ISDN PRI interface can be found in AT amp T Technical Reference 41459121 It contains the description of AT amp T Switched Network specific PRI capabilities and features It refers to AT amp T Technical Reference 41449 7 AT amp T Technical Reference 62411 and AT amp T Technical Reference 54016151 for protocol specification for both the network and user side of the interface 1 2 Purpose of This Document A CONformance TEST system for PRI CONTEST PRI has been designed and developed to determine the compatibility of Customer Premises Equipment CPE with the AT amp T ISDN PRI services and features as described in TR 41459 This document provides details of the test plan and test procedures used in CONTEST PRI This test plan at AT amp T s option may be altered in order to improve test methods to reflect new network capabilities or to facilitate testing of the CPE Implementation Under Test TUT in unusual cases where the test procedures described herein are not viable If it is determined that the test cases as described in this document are not consistent with AT amp T TR 41449 or TR 41459 AT amp T reserves the right to modify or include additional test cases In all these cases the compatibility statement will additionally reflect the verdicts associated with these modified test cases Technical descriptions of the interface requirements as they appear in this document are included solely for clarifying the
28. 1991 AT amp T All Rights Reserved Appendix B 4 July 1 1991 B 7 STATUS CHECK OF DATA LINK LAYER This frame sequence is executed at the beginning of each test in order to determine what state the IUT is in and bring it into Multiple Frame Established State B 7 1 not in Awaiting Establishment State CONTEST PRI Sends IUT Sends RR gt P 1 lt RR 57 0 87 4 57 5 58 0 58 4 58 5 F 1 SABME gt P 1 lt UA S7 0 F 1 or RR gt P 1 lt RNR S7 2 87 6 87 7 S8 2 88 6 58 7 1 SABME gt 1 lt UA 87 0 F 1 L RR gt 1 lt DM 54 F 1 SABME gt P 1 lt UA 87 0 du B 7 2 IUT in Awaiting Establishment State CONTEST PRI Sends IUT Sends 1 RR gt Ignore S5 0 P 1 UA gt no message S7 0 F 1 SABME gt P 1 lt UA 87 0 Copyright 1991 amp Rights Reserved Appendix B 5 July 1 1991 B 8 DATA LINK PROCEDURES MANDATORY This section contains test cases for basic data link procedures These tests are mandatory for all TUTs B 8 1 Awaiting Establishment State S5 Test M_STATES 4 10 Ignore inopportune frames 11 Initiate re establishment upon receipt of a frame with an undefined control 13 14 12 Initiate re establishment upon receipt of a long frame the FRMR is an implementation option or ignore Purpose of Test Transition into Multip
29. 41449 Since it is not required that an IUT support this procedure these tests are optional However if this procedure has been implemented these tests are mandatory Purpose of Test Ignore XID frames in S5 Ignore UI frames in S7 0 Ignore UI frames in S7 1 Ignore XID frames in S7 1 Ignore UI frames 58 4 NO 10 Ignore XID frames 58 5 Copyright 1991 AT amp T All Rights Reserved Test C_UIXID Verify IUT can Ignore UI frames S5 Ignore XIDframesinS7 0 6 _ Igore frames in S71 0 0 0 00000 0000 Ignore XID frames in S8 4 Ignore UI frames In S8 5 Appendix B 80 July 1 1991 B 9 5 1 1 Awaiting Establishment State S5 PREAMBLE CONTEST PRI Sends IUT Sends DM gt F 1 lt SABME S5 t P 1 TEST C UIXID 1 Purpose Ignore UI frames in S5 CONTEST PRI Sends IUT Sends gt Hgnore UA gt S7 0 F 1 DISC gt P 1 lt UA F 1 TEST C UIXID 2 Purpose Ignore XID frames in S5 e CONTEST PRI Sends IUT Sends XID gt Ignore UA gt 87 0 1 DISC gt P 1 lt UA la een eee The S denotes the state the TUT will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved Appendix B 81 B 9 5 1 2 Multiple Frame Established Normal State S7 0 TEST C UIXID 3 Purpose Ignore UI frames in S7 0 CONTEST PRI Sends
30. 42 C_US1 5 3 C_US1 2 4 4 IC_US13 145 C_US1 6 C_US1 6 7 4 7 CUSI4 5 1 C_US2 1 52 US2 5 5 3 C_US2 2 5 4 C_US2 3 5 IC_US2 6 36 C 0526 7 5 7 C_US2 4 M TIMERA 62 C TIMER 1 6 3 C TIMER2 6 4 C TIMER3 6 5 M TIMER2 M_IECHK 1 8 2 MIECHK2 83 M IECHK3 8 5 MLIECHKS 86 _ 24 87 M_IECHK 25 8 8 M_IECHK 6 8 9 M_IECHK 7 8 10 M_IECHK 8 8 11 M_IECHK 9 8412 8 13 M_IECHK 11 __ 8 14 M IECHK27 816 M IECHK 12 8 17 M IECHK 14 819 RESTART1 8 20 C_US1 8 8 22 C_US1 9 C_US2 8 C_US2 9 8 23 C_US1 11 8 25 C_US1 12 C_US2 11 2222 C_US2 12 8 26 M IECHK 16 8 28 IM ECHKI 8 29 IM_IECHK 18 8 30 MIECHK 9 84 M_IECHK 20 8 32 M_IECHK 22 91 IM_MAINT 9 2 M_MAINT 2 Copyright 1991 AT amp T All Rights Reserved 7 July 1 1991 1989 Version Current Version 1989 Version Current Version 1989 Version Current Version C_DCB 9 B2 1 C CH NEG 2 2 C CH NEG2 B2 3 C CH NEG3 B3 1 1 CC NE 1 B3 1 2 CC NF2 1 3 CC B3 1 4 CC CNEG NF44 B3 2 1 B3 2 2 CC DCB NFAS2 B4 1 C_CA_TSC 1 4 3 C_CA_TSC 4 B4 4 C_CA_TSC 7 B4 6 C_CA_TSC 14 B4 7 C_CA_TSC 26 B49 cC_CATSC_R l B4 10 CC_CATSC_R 6 4 11 __ C_CA_TSC 2 B4 12 C_CA_TSC 12 B4 13 C_CA_TSC 9 14 C_CA_TSC 24 B4 15 C_CA_TSC 24 B4 16 C_CA_TSC 2 B4 17 Dropped B4 18 C_CA_TSC 2 Jemen x e i B4 19 C CA TSC2 4 20 C_CA_TSC 2 4 21 TSC27 14 22 CC CATSC
31. 5 compatibility tests the following tests are mandatory for PRI Layer 1 compatibility Network connector test The result is for record only It is not required for pass Electrical characteristics test Framing test Reframe time test Input jitter tolerance test Output jitter test Transfer jitter test Synchronization tests Time interval error test is required only for an IUT that transfers timing 08 0 channelization test Alarm test Very severe burst error test Pulse density test Operational test Copyright 1991 AT amp T All Rights Reserved Appendix A 2 July 1 1991 Inband loopback test The last three test are optional if the UT is intended to operate through an approved CSU In addition if ESF framing is supported some or all of the tests in Attachment 2 ACCUNET ESF Compatibility Tests Procedures apply Among these tests the following are mandatory for an IUT which supports ESF framing Framing test CRC test Yellow alarm test Alarm indication signal Blue signal test If the IUT supports the enhanced facility maintenance features it must pass all tests in Attachment 2 A 5 Preparation of IUT for Input Jitter Tolerance Test The input jitter tolerance test measures the UT s ability to recover the digital information present in a jittered Quasi Random Test Signal ORTS The test signal will occupy the entire
32. AT amp T INTEGRATED SERVICES DIGITAL NETWORK ISDN PRIMARY RATE INTERFACE TEST PLAN FOR CUSTOMER PREMISES EQUIPMENT VERSION 2 0 AT amp T Developmental Relations Group 5 Copyright 1991 AT amp T All Rights Reserved 5 AT amp T ISDN PRI CAPABILITIES NOT COVERED BY THIS TEST PLAN 6 7 TESTING PROCESS s 8 SUMMARY eh ee REFERENCES 2 2 5 4 v CONTENTS INTRODUCTION 1 1 AT amp T ISDN PRI iterace 1 2 Purpose of This Document 1 3 Organization ey O ee 1 4 Audience 0 1 5 Terminology ee ee 9 GENERAL DESCRIPTION OF TEST SUITES 2 1 Layerl 24555020 2 2 Layer 2 2 3 Layer 3 REMOTE TESTING OF PRI CPE DIFFERENCES WITH THE 1989 TEST PLAN 4 1 Physical Layer 4 2 Layer 2 4 3 Layer 3 TESTING REQUIREMENTS ON IUT tA d d A NN NR mms mt mi Copyright 1991 AT amp T All Rights Reserved zs 1 INTRODUCTION 1 1 AT amp T ISDN PRI Interface AT amp T Integrated Services Digital Network ISDN Primary Rate Interface PRI is an ISDN offering based on CCITT Recommendations The interface is specified using the OSI layered model The physical layer of the interface is based on the standard DS 1 interface with Extended Superframe Format ESF or SF framing on CCITT Recommendations 1 412 1 431 and 1 21
33. D4 or D3 D4 6 In this document DS 1 terminal equipment refers to customer premises equipment which terminates the framing channel Copyright 1991 AT amp T All Rights Reserved Appendix 9 July 1 1991 3 4 Part IIT Protocol Tests The Data Link segment of the ESF carries maintenance messages between the network and the CPE The protocol used by the data link is a simplified X 25 link layer level 2 with a byte oriented information layer For more information on the maintenance message set see TR54016 1 These tests determine the CPE s capability to receive decode and respond to maintenance messages from the network The CPE should transmit appropriate responses to network requests The responses must be sent less than 50ms after receiving the requests The test bed transmits maintenance messages to the CPE and monitors the responses Responses must be correct in format appropriate in content and timely 5 Part IV Parameter Collection and Storage Tests The CPE must record logical and framing transmission errors These error records become criteria for determining Errored Seconds ES Unavailable Seconds UAS and if the enhanced parameter set is supported Severely Errored Seconds SES Bursty Errored Seconds BES Loss of Frame Count LOFC and Controlled Slip Seconds CSS Upon request the CPE sends these error records and error related parameters to the network over the data link in the form of maintenance m
34. DISC gt P 1 lt DM F July 1 1991 Purpose Report that data link is disconnected by non acknowledgement of I frame or by ignoring it CONTEST PRI Sends IUT Sends IL P 1 lt DM F 1 I gt Hgnore T f The S denotes the new state the TUT will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved Appendix B 51 July 1 1991 TEST C_STATE4 4 Purpose Report status in a disconnected mode and not ready to receive I frames CONTEST PRI Sends IUT Sends RR gt P 1 lt DM F 1 or RR gt Ignore Bu Me TEST C_STATE4 5 Purpose Report status in a disconnected mode and don t care if peer is not ready CONTEST PRI Sends IUT Sends RNR gt P 1 lt DM F 1 or RNR gt Hgnore P 1 TEST C_STATE4 6 Purpose Report status in a disconnected mode REJ doesn t initiate error recovery procedures CONTEST PRI Sends IUT Sends REJ gt P 1 lt DM F 1 or REJ gt Hgnore P 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 52 B 9 1 2 Inopportune Frames TEST C_STATE4 7 Purpose Ignore inopportune frames CONTEST PRI Sends UA gt F 0 DISC gt P 1 TEST C_STATE4 8 Purpose Ignore inopportune frames CONTEST PRI Sends DM gt F 0 DISC gt P 1 TEST C_STATE4 9 Purpose Ignore inopportune frames REJ gt 0 DISC gt
35. I with Invalid N R gt Ignore P 0 DISC gt P 1 lt DM b F 1 XX is an undefined unrecognizable frame Copyright 1991 AT amp T All Rights Reserved Appendix B 55 TEST C_STATE4 17 Purpose Report that data link is disconnected or ignore the errored I frame don t initiate error recovery in a state where multiple frame operation is not possible CONTEST PRI Sends IUT Sends I with invalid N R gt P 1 DM F 1 or I with Invalid N R gt Ignore P 1 TEST C_STATE4 18 Purpose Ignore a command frame that is too long while in a disconnected mode CONTEST PRI Sends IUT Sends Command Frame too long gt P 1 Ignore DISC gt P 1 lt DM F 1 TEST C 8 4 19 Purpose Ignore a command frame that is too short while in a disconnected state CONTEST PRI Sends IUT Sends Command Frame too short gt P 0 Ignore DISC gt P 1 lt DM Copyright 1991 AT amp T All Rights Reserved Appendix B 56 July 1 1991 TEST C_STATE4 20 Purpose Ignore a frame with a non zero TEI while in a disconnected mode CONTEST PRI Sends IUT Sends Command Frame with incorrect TEI gt P 1 Ignore DISC gt P 1 lt DM F 1 TEST C_STATE4 21 Purpose Ignore a frame with a non zero SAPI while in a disconnected mode CONTEST PRI Sends IUT Sends Command Frame with incorrect SAPI
36. NTEST PRI Sends IUT Sends RNR gt P 1 lt RR 87 4 F 1 RR gt P 0 TEST M_STATE7 0 7 Purpose Report its current V R value CONTEST PRI Sends IUT Sends gt P 1 Copyright 1991 AT amp T All Rights Reserved July 1 1991 Appendix B 16 July 1 1991 TEST M STATE7 0 8 Purpose Initiate re establishment knowing that retransmission of a frame will not clear an error condition CONTEST PRI Sends IUT Sends FRMR gt F 1 lt SABME 55 P 1 UA gt F 1 TEST M_STATE7 0 9 Purpose Initiate re establishment upon receipt of an unsolicited UA or ignore the unsolicited UA CONTEST PRI Sends IUT Sends UA gt F 1 lt SABME 55 P 1 UA gt F 1 Ignore 8 2 2 Inopportune Frames TEST M_STATE7 0 10 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends RNR gt 87 4 P 0 RR gt 0 DISC gt 1 lt UA F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 17 July 1 1991 TEST M_STATE7 0 11 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends RR gt Ignore P 0 DISC gt P 1 lt UA F 1 TEST M STATE7 0 12 Purpose Ignore inopportune frames Penrose ae ag p CONTEST PRI Sends IUT Sends REJ gt Ignore P 0 DISC gt P 1 lt UA PRIORE S B 8 2 3 Invalid Fra
37. ONTEST PRI Sends IUT Sends RR gt P 1 lt RR RR gt F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 33 July 1 1991 TEST M_STATES 4 7 Purpose Set its V A to the value N R transmit an RR response CONTEST PRI Sends IUT Sends RNR gt P 1 RR gt F 1 TEST M_STATES 4 8 Purpose Set its V A to the value N R transmit an RR response CONTEST PRI Sends IUT Sends REJ gt P 1 lt RR F 1 RR gt j TEST M_STATES 4 9 Purpose Initiate re establishment CONTEST PRI Sends IUT Sends FRMR gt F 1 lt SABME 55 P 1 UA gt 87 0 F 1 TEST STATES 4 10 Purpose Initiate re establishment upon receipt of an unsolicited UA or ignore the unsolicited UA CONTEST PRI Sends IUT Sends UA gt F 1 lt SABME 55 P 1 UA gt 67 0 F 1 or UA gt Hgnore F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 34 July 1 1991 B 8 4 2 Inopportune Frames TEST M_STATES 4 11 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends RNR gt Ignore P 0 RR gt Ignore F 1 DISC gt P 1 LU A F 1 TEST M STATES 4 12 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends RR gt S8 0 P 0 DISC gt P 1 TEST M STATES 4 13 Purpose Ignore inopportune frames CONTEST PRI Sends I
38. R gt P 0 lt FRMR F 0 lt SABME 55 P 1 UA gt 87 0 1 I with invalid N R gt P 0 lt SABME S5 P 1 UA gt 57 0 eg he a Copyright 1991 AT amp T All Rights Reserved Appendix B 37 July 1 1991 B 8 5 Timer Recovery Reject Peer Receiver Busy State S8 5 eres U M M MM Re establish the data link and transition into multiple frame established mode clearing its reject condition Disconnect the data link Exit timer recovery procedures and transition into multiple frame established state Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore Acknowledge a valid I frame update its receive state variable V R Respond to inquiry but don t clear timer recovery condition until get RR F 1 9 Initiate re establishment 10 Initiate re establishment upon receipt of an unsolicited UA or ignore the unsolicited UA 11 13 Ignore inopportune frames 14 Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option 15 Report the value of its V R reject condition is already set 16 Initiate re establishment upon receipt of an invalid N R value the FRMR is an implementation option All the tests in this section will execute the status check procedure described in Se
39. SES storage and reporting capabilities The test bed inserts CRC6 and framing errors into the transmitted signal The test bed then requests the SES Count from the CPE and verifies that the errors have been collected properly This test applies only to CPE that support the enhanced parameter set 5 5 Loss of Frame Count LOFC Test This test ascertains the CPE s LOFC storage and reporting capabilities The test bed inserts framing errors into the transmitted signal The test bed then requests the LOFC from the CPE and verifies that the errors have been collected properly This test applies only to CPE that support the enhanced parameter set Copyright 9 1991 AT amp T All Rights Reserved Appendix A 10 July 1 1991 5 6 Controlled Slip Seconds CSS Count Test This test ascertains the CPE s CSS storage and reporting capabilities force controlled slips to occur in the CPE the test bed inserts a fixed frequency offset into the transmitted signal The test bed then requests the CSS Count from the CPE and verifies that the errors have been collected properly Implementation of this parameter is optional and applies only to CPE that support the enhanced parameter set 6 Part V Maximum Error Check Test This test verifies proper ES collection and storage checks that CPE counters do not reset after they reach their highest binary value 216 1 and checks for the proper maintenance of 15 minute interval boundaries The test bed ins
40. State S7 2 These tests are included for an TUT which supports the procedure for unimplemented frames that is specified in TR 41449 Since it is not required that an IUT support this procedure these tests are optional However if this procedure has been implemented and if the TUT can send a RNR frame in Multiple Frame Established State these tests are mandatory Purpose of Test Test C_UIXID Ignore UI frames in 7 2 Ignore XID frames 57 2 PREAMBLE CONTEST PRI Sends IUT Sends TEST C_UIXID 15 Purpose Ignore UI frames in S7 2 FC EXEAT RP CREE T RD I ee ee Pt CONTEST PRI Sends IUT Sends UL gt Ignore DISC gt P 1 UA F 1 TEST C UIXID 16 Purpose Ignore XID frames in S7 2 CONTEST PRI Sends IUT Sends XID gt Ignore DISC gt P 1 lt UA 54 F 1 t The 5 denotes the new state the IUT will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved Appendix B 88 July 1 1991 B 9 5 5 Timer Recovery Peer and Own Receiver Busy State S8 6 These tests are included for an IUT which supports the procedure for unimplemented frames that is specified in TR 41449 Since it is not required that an IUT support this procedure these tests are optional However if this procedure has been implemented and if the UT can send a RNR frame in Timer Recovery State these tests are mandatory Purpose of Test Test C_UIXID Verify IUT can
41. T amp T All Rights Reserved ii APPENDIX A LAYER 1 TEST PLAN A 1 SCOPE OF THIS APPENDIX The physical layer protocols for the AT amp T ISDN PRI are specified in TR 62411 and TR 54016 This appendix describes the procedure for obtaining a compatibility statement for the physical layer A 2 ORGANIZATION This appendix describes the tests used to verify conformance to the Layer 1 procedures of the AT amp T ISDN PRI by a CPE These tests are derived from the ACCUNET T1 5 and ACCUNET ESF compatibility test plans which are also included in this appendix Also it has been observed that it is helpful if a vendor prepares the IUT for the input jitter tolerance test Two ways of mechanizing the detection of errors is also included in this appendix A 3 GLOSSARY OF TERMS AMI Alternate Mark Inversion B8ZS Bit8 Zero Suppression CSU Channel Service Unit ORTS Quasi Random Test Signal ZCS Zero Code Suppression A 4 REQUIREMENT FOR COMPATIBILITY The IUT must be compatible with either SF or ESF framing with ESF being the preferred choice AT amp T encourages vendors to provide both with the choice being a user selected option The TUT must be compatible with AMI line coding but AT amp T highly recommends that the vendor also provide a B8ZS alternative as a user selected option Also note that B8ZS is a necessary requirement for clear channel i e unrestricted operation at digital data rates of 64 Kbps or higher Among ACCUNET T1
42. UT Sends gt 58 0 0 DISC gt P 1 lt UA F 1 B 8 4 3 Invalid Frames Copyright 1991 AT amp T All Rights Reserved Appendix B 35 July 1 1991 TEST M_STATES 4 14 Purpose Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option _ n CONTEST PRI Sends IUT Sends t gt lt FRMR F 0 lt SABME S5 P 1 UA gt 57 0 F 1 or XX T gt lt SABME S5 P 1 UA gt 57 0 ee TEST M_STATES 4 15 Purpose Initiate re establishment upon receipt of a frame with a long RR frame the FRMR is an implementation option CONTEST PRI Sends IUT Sends XX T gt lt FRMR F 0 lt SABME 55 P 1 UA gt 87 0 F 1 or XX T gt lt SABME S5 P 1 UA 57 0 Ba e f XX is an undefined unrecognizable frame XXis along RR frame Copyright 1991 AT amp T All Rights Reserved Appendix B 36 July 1 1991 TEST 8 8 4 16 Purpose Reject an I frame with invalid 5 and report the value of its V R CONTEST PRI Sends IUT Sends I with invalid N S gt P 0 lt REJ 58 5 F 0 RR gt Jio RC T TEST 8 8 4 17 Purpose Initiate re establishment upon receipt of invalid N R value the FRMR is implementation option Tu CONTEST PRI Sends IUT Sends I with invalid N
43. ability Test The 64 kb s clear channel capability implies that the CPE doesn t use any inband signaling and uses B8ZS to replace zero bytes This test checks the ability of the CPE to support this capability 10 Delay Tolerance Test Terrestrial 1 5 Mb s circuits will experience a one way absolute time delay of no more than 60 msec For Satellite circuits the round trip time delay can be up to 700 msec This test determines if the CPE can tolerate a time delay of the DS 1 signal between two end points 11 Inband Loopback Test AT amp T maintenance personnel use loopbacks to segment and test line performance This test determines whether the CPE will respond to the loopback up and loopback down signals 12 Input Jitter Tolerance Test Jitter is the random phase modulation of the digital signal It is generated by digital regenerators and digital multiplexers in digital transmission systems The CPE is tested to determine the amount of input jitter it will tolerate while operating in a loop timing mode If the CPE is intended to transfer or terminate timing the input jitter tolerance of the clock recovery circuit is also tested 13 Output Jitter Test Excessively jittered signals from CPE may cause the network to lose signal frame synchronization The purpose of the output jitter test is to ensure that the CPE does not introduce high jitter levels into the network 14 Transfer Jitter Test The jitter component of the recovered clock
44. ate re establishment upon receipt of an invalid N R value the FRMR is an implementation option CONTEST PRI Sends IUT Sends I with invalid N R gt P 0 lt FRMR F 0 lt SABME S5 P 1 UA gt 57 0 F 1 I with invalid N R gt P 0 lt SABME 55 P 1 UA S7 0 F 1 Copyright 9 1991 AT amp T All Rights Reserved Appendix B 76 July 1 1991 B 9 4 Send Sequence Number Tests These tests are included for an IUT which can be configured to send Information frames on demand Since it is not required that an IUT support this feature these tests are optional However if this feature has been implemented these tests are mandatory Purpose of Test Test SNDSEQ 1 Accept the acknowledgement of lt k Information frames with a single RR frame 2 Transmit only k I frames without acknowledgement 3 Retransmit I frames starting with the I frame indicated by the N R contained in the REJ frame All the tests in this section will execute the status check procedure described in Section B 7 Additionally the following preamble will also be executed PREAMBLE CONTEST PRI Sends IUT Sends RR gt P 1 Copyright 1991 AT amp T All Rights Reserved TEST C_SNDSEQ 1 Appendix B 77 July 1 1991 Purpose Accept the acknowledgement of lt k Information frames with a single RR frame CONTEST PRI Sends IUT Sends RR gt P 1 N R 0 lt
45. ation mode CONTEST PRI Sends IUT Sends DISC gt P 1 lt DM F 1 UA gt 57 0 F 1 DISC gt P 1 lt UA m F 1 Copyright 1991 AT amp T All Rights Reserved Appendix 7 B 8 1 2 Inopportune Frames TEST M_STATES 4 Purpose Ignore inopportune frames TEST M_STATES 5 Purpose Ignore inopportune frames TEST M_STATES 6 Purpose Ignore inopportune frames CONTEST PRI Sends UA gt F 0 UA gt F 1 DISC gt 1 IUT Sends Ignore 87 0 UA F 1 CONTEST PRI Sends DM gt F 0 gt F 1 DISC gt P 1 CONTEST PRI Sends gt 0 UA gt F 1 DISC gt P 1 IUT Sends Ignore 57 0 lt UA F 1 IUT Sends Ignore S7 0 V Copyright 1991 AT amp T All Rights Reserved July 1 1991 Appendix B 8 July 1 1991 TEST M_STATES 7 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends RR gt Hgnore P 0 UA gt 57 0 F 1 DISC gt P 1 lt UA _ F 1 TEST M_STATES 8 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends REJ gt Hgnore P 0 UA gt 57 0 F 1 DISC gt P 1 lt UA F 1 f TEST STATES 9 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends FRMR gt Ignore F 0 UA gt 57 0 F 1 DISC gt P 1 lt UA F 1 C
46. been fixed Copyright 1991 AT amp T All Rights Reserved 5 July 1 1991 3 The order o tests have been changed in some places so that all mandatory tests are followed by conditional tests The following table gives the mapping between the two groupings Section number of Appendix 2 of the 1989 version precede the forward slash 1989 Version Current Version 2 1 11 14 19 STATEA 1 17 2 12 13 C UIXID 11 12 3 1 10 13 15 M_STATES 1 11 13 14 3 11 12 C UIXID 1 2 4 1 11 14 16 C STATE6 1 14 412 13 C UIXID 13 14 5 1 12 15 18 M STATE7 0 1 13 17 19 5 13 14 C_UIXID 3 4 6 1 12 15 17 M STATE7 1 1 15 6 13 14 C UIXID 5 6 6 18 M TIMER Ecc Z 7 1 12 15 17 C_STATET 2 1 15 7 13 14 C UIXID 15 16 8 1 13 16 18 STATES 4 1 14 16 17 8 14 15 _C_UIXID 7 8 E 9 1 13 16 18 M STATES 5 1 16 9 14 15 C_UIXID 9 10 10 1 12 15 17 10 13 14 C STATES 6 1 15 C UIXID 17 18 M_RCVSEQ 1 C SNDSEQ 1 3 M TIMER25 0 C STATEA 18 21 12 1 3 14 1 2 5 6 14 3 Dropped 14 4 M STATE7 0 20 14 7 8 STATE7 0 21 22 14 9 M STATE7 0 23 4 3 Layer 3 The changes in Layer 3 are more extensive New Network services and features require additional tests In addition to new tests the tests have been grouped differently so as to ease the selection of tests for a given CPE The following table gives the mapping between the old and new tests The followin
47. ction B 7 Additionally the following preamble will also be executed PREAMBLE CONTEST PRI Sends IUT Sends I with invalid N S gt lt REJ S7 1 RNR gt P 1 lt RR 87 5 F 1 Do Nothing T200 expires lt RR S8 5 Er 1 Copyright 9 1991 AT amp T All Rights Reserved Appendix B 38 B 8 5 1 Valid Frames TEST 8 8 5 1 July 1 1991 Purpose Re establish the data link and transition into multiple frame established mode clearing its reject condition TEST M STATES 5 2 Purpose Disconnect the data link TEST M STATES 5 3 CONTEST PRI Sends IUT Sends SABME gt P 1 lt UA S7 0 F 1 CONTEST PRI Sends IUT Sends DISC gt P 1 lt UA 54 F 1 Purpose Exit timer recovery procedures and transition into multiple frame established state CONTEST PRI Sends IUT Sends RR gt F 1 DISC gt P 1 S denotes the new state the IUT will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved S7 1 lt UA F 1 Appendix B 39 TEST M_STATES 5 4 July 1 1991 Purpose Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore DM gt F 1 DISC gt P TEST 8 8 5 5 CONTEST PRI Sends IUT Sends DM gt F 1 lt SABME 55 P 1 UA gt S7 0 or Ignore lt UA F 1 Pu
48. e CPE should not initiate network or local alarms for error events of 2 5 second or shorter duration Graceful recovery from these burst error events is essential to customer satisfaction The CPE is tested for burst error rates up to 5 107 Copyright 1991 AT amp T All Rights Reserved Appendix A 8 July 1 1991 ATTACHMENT 2 ACCUNET ESF Compatibility Test Procedure 1 Introduction Extended Superframe Format ESF is a DS 1 Superframe structure that permits more signaling states to be defined 16 than in previous DS 1 Superframe structures ESF also facilitates maintenance testing and line quality monitoring without interrupting customer information flow For these reasons DS 1 circuits are being converted from D4 Framing to ESF As DS 1 access lines convert from SF Framing to ESF Customer Premises Equipment CPE must also convert from SF Framing to ESF There is a need to verify that the CPE vendor s implementation of ESF is compatible with AT amp T s implementation of ESF For this reason the ESF Compatibility Tests were devised This document describes the Extended Superframe Format ESF Compatibility Tests 2 Part I Frame Structure Tests 2 1 Framing Test This test determines whether the CPE is compatible with the network ESF framer The CPE is connected to the test bed and unimpaired transmission conditions are created between the two Transmission conditions are observed 2 2 CRC Test The CPE s capability
49. e prefix CC 2 1 Layer 1 Layer 1 tests are consistent with those done to verify compatibility with the ACCUNET 9 T1 5 Service including the Customer Controlled Reconfiguration CCR M24 and M24 DDT service functions as well as the enhanced facility maintenance features of the Extended Superframe Format ESF Appendix A provides descriptions of the CCR M24 M24 DDT and ESF tests Some special preparation of the IUT is required so that the input jitter tolerance test can be conducted It is the responsibility of the vendor to prepare for this test before the IUT is presented for testing The requirement and possible ways to prepare the IUT for these tests are discussed in Appendix A 2 2 Layer 2 Layer 2 tests verify the conformance of the IUT to the procedures as specified in TR 41449 and TR 41459 This is done by evaluating the response if any of the IUT upon receipt of one of the following frame types i Valid frames These are LAPD frames that are syntactically valid and are sent to the IUT in the correct state ii Inopportune frames These are LAPD frames that are syntactically valid but are sent to the IUT in an improper state iii Invalid frames These are frames with syntax that does not conform to the LAPD specifications Copyright 1991 AT amp T All Rights Reserved 3 July 1 1991 For each test the CONTEST PRI will initialize the IUT into one of the nine possible states and compare the response from the
50. ed bit signaling is used for trunk supervision on a DS 0 channel This test determines that the CPE properly implements and responds to the A and B bit signals for trunk supervision 20 Alarm Test Alarms are used by the network and the CPE to indicate trouble with the circuit Two sets of alarms are currently used in ACCUNET 1 5 red and yellow alarms for DS 1 terminating equipment and blue alarm for non DS 1 terminating equipment For DS 1 terminating CPE the CPE is tested to to show local red alarm and transmit remote yellow alarm to the network for loss of synchronization with the incoming DS 1 signal Non DS 1 terminating CPE should transmit blue alarm when it loses the dropside incoming DS 1 signal 21 Minimum Acceptable Performance Test The voice frequency channel units of the CPE are tested for minimum acceptable performance limits for voice grade transmission service 22 Digital Error Performance Test The error performance of the DS 1 signal is varied to determine the effect on subrate digital data performance The DS 0 channels are tested for both gaussian and bursty error rates 4 Tn the context of this document DS 1 terminating equipment refers to CPE that terminates the framing channel Copyright 1991 AT amp T All Rights Reserved Appendix A 7 July 1 1991 23 Very Severe Burst Error Test The purpose of the very severe burst error test is to check that the CPE can respond to severe burst errors properly Th
51. ed mode and don t care if peer is not ready 6 Report status in a disconnected mode REJ doesn t initiate error recovery procedures 7 11 Ignore inopportune frames 12 13 Ignore inopportune frames a 14 Ignore frame with undefined control bit field 15 16 Ignore errored I frames with poll bit not set L S cee PP s 17 Report that data link is disconnected or ignore the errored I frame don t initiate error recovery in a state where multiple frame operation is not possible 18 Ignore a command frame that is too long while in a disconnected mode 19 Ignore a command frame that is too short while in a disconnected state 20 Ignore a frame with a non zero TEI while in a disconnected mode 21 Ignore a frame with a non zero SAPI while in a disconnected mode All the tests in this section will execute the status check procedure described in Section B 7 Additionally the following preamble will also be executed PREAMBLE CONTEST PRI Sends IUT sends DISC gt P 1 lt UA S4 t F 1 Copyright 1991 AT amp T All Rights Reserved B 9 1 1 Valid Frames TEST C_STATE4 1 Appendix B 50 Purpose Transition into Multi Frame Established State TEST C_STATE4 2 CONTEST PRI Sends IUT Sends SABME gt P 1 UA 87 0 F 1 or gt P 1 lt DM F 1 Purpose Acknowledge that data link is already disconnected TEST 5 4 3 CONTEST PRI Sends IUT Sends
52. ementation option CONTEST PRI Sends IUT Sends XX T gt lt FRMR F 0 lt SABME S5 P 1 UA gt F 1 or XX gt lt SABME 55 P 1 UA gt ler TEST STATE7 0 17 Purpose Reject an I frame with an invalid N S and report the proper value of its V R CONTEST PRI Sends IUT Sends I with invalid N S gt P 0 lt REJ S7 1 F 0 is a long DISC frame Copyright 1991 AT amp T All Rights Reserved Appendix B 20 July 1 1991 TEST M_STATE7 0 18 Purpose Initiate re establishment upon receipt of an invalid N R value the FRMR is an implementation CONTEST PRI Sends IUT Sends I with invalid N R gt P 0 FRMR F 0 lt SABME S5 P 1 UA gt F 1 or I with invalid N R gt 0 lt SABME 55 P 1 UA gt gt 8 Copyright 1991 AT amp T All Rights Reserved Appendix B 21 July 1 1991 TEST 8 7 0 19 Purpose Initiate re establishment upon receipt of an I frame with invalid N S and N R IUT response to the I frame depends on the order in which the N S and N R are checked FRMR and REJ are both implementation options CONTEST PRI Sends IUT Sends I with invalid N R amp N S gt P 0 lt FRMR F 0 lt SABME S5 P 1 UA gt F 1 e or I with invalid N R amp N S gt P 0 lt SABME S5 P 1 UA
53. ends IUT Sends RR gt Ignore P 0 UA gt 54 1 DISC gt P 1 lt DM F 1 TEST C_STATE6 9 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends gt Hgnore P 0 UA gt S4 F 1 DISC gt P 1 lt DM F 1 TEST C_STATE6 10 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends FRMR gt Hgnore F 0 UA gt S4 F 1 DISC gt P 1 lt DM A F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 61 July 1 1991 TEST C_STATE6 11 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends gt Hgnore P 0 UA S4 F 1 DISC gt P 1 lt DM F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 62 July 1 1991 B 9 2 3 Invalid Frames TEST C_STATE6 12 Purpose Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option or ignore CONTEST PRI Sends IUT Sends gt lt FRMR F 0 lt SABME S5 P 1 UA gt 57 0 F 1 DISC gt P 1 lt UA F 1 or XX gt lt SABME S5 P 1 UA gt 87 0 1 DISC gt P 1 lt UA F 1 or XX gt Ignore DISC gt P 1 lt UA F 1 XX is an undefined unrecognizable frame Copyright 1991 AT amp T All Rights Reserved Appendix B 63 July 1 1991 TEST C_STATE6 13 P
54. erts errors at a high rate into the transmitted signal for at least 19 hours The test bed then requests the Performance and Errored ESF data from the CPE The test bed verifies that counters did not reset during the test run and that ES information was properly stored for each 15 minute interval Copyright 1991 AT amp T All Rights Reserved CONTENTS APPENDIX B LAYER 2 TEST PLAN B 1 SCOPE OF THIS APPENDIX B 2 ORGANIZATION B 3 GLOSSARY OF TERMS B 4 DESCRIPTION OF SCRIPT PRESENTATION B 5 TESTING REQUIREMENTS ON IUT B 6 SELECTION OF TESTIS B 7 STATUS CHECK OF DATA LINK LAYER B 7 1 TUT not in Awaiting Establishment State B 7 2 IUT in Awaiting Establishment State B 8 DATA LINK PROCEDURES MANDATORY B 8 1 Awaiting Establishment State S5 B 8 1 1 Valid Frames B 8 1 2 Inopportune Frames B 8 1 3 Invalid Frames B 8 2 Multiple Frame Established Normal State 57 0 B 8 2 1 Valid Frames 8 2 2 Inopportune Frames B 8 2 3 Invalid Frames B 8 3 Multiple Frame Established Reject State 57 l B 8 3 1 Valid Frames 22 8 3 2 Inopportune Frames B 8 3 3 Invalid Frames ie B 8 4 Timer Recovery Normal Peer Receiver Busy State 58 4 2 B 8 4 1 Valid Frames s A da ve sls nes 4G B 8 4 2 Inopportune Frames B 8 4 3 Invalid Frames B 8 5 Timer Recovery Reject Peer Receiver Bus State 58 5 8 5 1 Valid Frames 49 72 qe B 8 5 2 Inopportune Frames B 8 5 3 Invalid Fra
55. es the new state the TUT will be in after sending this frame Copyright 9 1991 AT amp T All Rights Reserved July 1 1991 Appendix B 84 July 1 1991 B 9 5 1 5 Timer Recovery Reject Peer Receiver Busy State S8 5 PREAMBLE CONTEST PRI Sends IUT Sends I with invalid N S gt lt REJ S7 1 t RNR gt P 1 lt RR 57 5 F 1 Do Nothing T200 expires lt RR S8 5 P 1 TEST UIXID 9 Purpose Ignore UI frames in S8 5 CONTEST PRI Sends IUT Sends UI gt Ignore DISC gt P 1 lt UA F 1 TEST C UIXID 10 Purpose Ignore XID frames in S8 5 CONTEST PRI Sends IUT Sends XID gt Ignore DISC gt P 1 lt UA F 1 The S denotes the new state the TUT will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved Appendix B 85 July 1 1991 B 9 5 2 TEI Assigned State S4 These tests are included for an IUT which supports the procedure for unimplemented frames that is specified in TR 41449 Since it is not required that an IUT support this procedure these tests are optional However if this procedure has been implemented and if the TUT can remain in TEI Assigned State long enough these tests are mandatory Purpose of Test Test C_UIXID Verify IUT can Ignore UI frames in S4 Ignore XID frames 54 PREAMBLE CONTEST PRI Sends IUT sends DISC gt P 1 lt UA S4 t F 1 TEST C UIXID 1
56. essages These tests ascertain the CPE s ability to collect and store error and error related parameters The CPE s ability to zero parameter counters is also tested during the parameter collection tests 5 1 ES UAS Test The CPE must collect both logical and framing errors and record ESs and UASs correctly The test bed inserts both logical and framing errors into the transmitted signal The test bed then requests the Performance Data from the CPE and verifies that the errors have been correctly converted into ESs and FSs stored in the proper ES FS storage intervals and accumulated in the ES FS 24 hr totals 5 2 Errored ESF Count Test These tests ascertain the CPE s ESF error event collection storage and reporting capabilities The test bed inserts Gaussian and Burst Errors into the transmitted signal The test bed then requests the Errored ESF Count from the CPE and verifies that the errors have been collected properly Several test runs with varying Gaussian and Burst Error rates are made 5 3 Bursty Errored Seconds BES Count Test This test ascertains the CPE s BES storage and reporting capabilities The test bed inserts Gaussian and Burst Errors into the transmitted signal The test bed then requests the BES Count from the CPE and verifies that the errors have been collected properly This test applies only to CPE that support the enhanced parameter set 5 4 Severely Errored Seconds SES Count Test This test ascertains the CPE s
57. g scheme is used to specify the tests from the 1989 version i tests from Appendix 3 2 of the 1989 version has a prefix B to distinguish the number from that of Appendix 3 1 of the 1989 version ii the last component is the test number iii the rest identify the section number in which the test appears The table does not contain information regarding Sections 7 10 and 11 of Appendix 3 1 and Sections 7 and 8 of Appendix 3 2 These tests have been incorporated and expanded in tests of Section C 15 The modifications are so extensive the mapping may not be very useful Copyright 1991 AT amp T All Rights Reserved 1989 Version Current Version 1989 Version July 1 1991 Current Version 1989 Version Current Version 1 1 M_VAL2 13 _ M_VAL 3 1 4 CAL s M VAL 1 7 VAL IM VAL6 M9 M_VAL 7 1 10 AZ 113 C STATE76 Lt SE ms 1 15 CSTATE72 1 16 C STATE73 1417 IM VAL10 118 M_VAL 11 1 19 M_VAL 12 1 20 IM_VAL 13 121 M_VAL 14 1 22 M VALIS 1 23 M_VAL 16 1 25 C_FAST_CON 3 1 26 C_STATE9 7 _ 9 1 1 28 C_STATE9 2 1 29 M_VAL 17 1 31 M_MAUUL1 1 32 M INOP 1 2 2 M _INOP 2 2 3 M_INOP 4 2 5 M_INOP 5 2 6 C STATE7 6 D M INOP 6 2 9 _INOP 2 10 M_INOP 8 3 1 MINVALI 32 VAL 3 3 M_INVAL 3 M MAUUI2 E 3 4 M_INVAL4 13 5 C_STATE9 4 C_STATE9 5 3 7 C_STATE7 4 13 8 us ie M_INVAL 7 7 C STATE7 5 M MAUUI3 3 10 M_INVAL 8 4 1 CUSI
58. gt F 1 or I with invalid N R amp N S gt P 0 lt REJ F 0 lt FRMR F 0 lt SABME S5 P 1 UA gt F 1 825 252 2 55 2 EER or I with invalid N R amp N S gt P 0 lt REJ F 0 lt SABME 55 P 1 UA gt F 1 Copyright 9 1991 AT amp T All Rights Reserved Appendix B 22 July 1 1991 CONTEST PRI Sends IUT Sends TEST M_STATE7 0 20 Purpose Ignore a command frame that is too short while in multiple frame established state CONTEST PRI Sends IUT Sends Command Frame too short gt P 0 Ignore DISC gt 1 lt UA F 1 TEST M_STATE7 0 21 Purpose Ignore a frame with a non zero TEI while in multiple frame established state CONTEST PRI Sends IUT Sends Command Frame with incorrect TEI gt P 1 Ignore RR gt 1 lt RR F 1 TEST STATE7 0 22 Purpose Ignore a frame with a non zero SAPI while in multiple frame established state MAME WI a TONTA x 4 pie SSC ora CONTEST PRI Sends IUT Sends Command Frame with incorrect SAPI gt P 1 Ignore RR gt P 1 lt RR eee E F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 23 TEST M_STATE7 0 23 July 1 1991 Purpose Reject a command frame with an improper C R bit initiate reestablishment of data link or Command Frame with incorrect C R gt P 1 UA
59. gt F 1 RR gt P 1 This is considered a control field error An example of such a frame would be a DISC response Copyright 1991 AT amp T All Rights Reserved CONTEST PRI Sends IUT Sends Command Frame with incorrect C R gt P 1 lt FRMR F 0 lt SABME S5 P 1 UA gt F 1 RR gt P 1 lt RR F 1 lt SABME 55 P 1 Appendix B 24 July 1 1991 B 8 3 Multiple Frame Established Reject State S7 1 Purpose of Test Test M_STATE7 1 IUT can Clear reject exception condition and re establish the data link Clear reject exception condition and disconnect the data link 3 Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore 4 Acknowledge receipt of a valid Information frame and transition into normal multiple frame operation mode ipsa ee adi coe Re eee 5 Respond to a normal status check of the data link and report its current V S and V R values 6 Report that it is not in an own receiver busy condition 7 Report its current V R value 8 Initiate re establishment knowing that retransmission of the frame will not clear an error condition 9 Initiate re establishment upon receipt of an unsolicited UA or ignore the unsolicited UA rm Ignore inopportune frames Initiate re establishmen
60. iate re establishment and clear its own receiver busy condition 9 Initiate re establishment upon receipt of an unsolicited or ignore the unsolicited UA 10 12 Ignore inopportune frames 13 Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option 14 Discard an I frame with an invalid N S and report the value of its V R respond with RNR 15 Initiate re establishment upon receipt of an invalid N R value the FRMR is an implementation option et tn ash All the tests in this section will execute the status check procedure described in Section B 7 Additionally the following preamble will also be executed PREAMBLE CONTEST PRI Sends IUT Sends lt RNR 57 2 t B 9 3 1 1 Valid Frames The S denotes the new state the IUT will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved Appendix B 65 TEST C STATE7 2 1 Purpose Re establish the data link and clear its own receiver busy condition CONTEST PRI Sends IUT Sends SABME gt P 1 lt UA S7 0 _ F 1 TEST C_STATE7 2 2 Purpose Disconnect the data link CONTEST PRI Sends IUT Sends DISC gt P 1 lt UA S4 F 1 TEST C STATE7 2 3 July 1 1991 Purpose Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore CONTEST
61. ions to disable or relax some of the protocol requirements during testing In particular for Layer 2 testing the IUT must disable Layer 3 operation during the execution of Layer 2 tests B 6 SELECTION OF TESTS Based on the capabilities and the features supported by the IUT a subset of the tests will be selected and the TUT should successfully complete all the selected tests This section lists the conditions under which the tests will be selected 1 All IUTs will be tested using the first 7 test groups that are specified in Section B 8 2 If the IUT can remain TEI Assigned State long enough for testing purposes approximately 2 seconds the tests in Section B 9 1 will be executed 3 If the TUT can be forced to send DISC frame on demand then the tests in Section B 9 2 will be executed 4 If the IUT be forced to send a RNR frame while in Multiple Frame Established state then the tests in Section B 9 3 1 will be executed 5 Ifthe IUT can be forced to send RNR frame while in Timer Recovery state then the tests in Section B 9 3 2 will be executed 6 If the IUT can be forced to send Information frames on demand then the tests in Section B 9 4 will be executed 7 H the IUT supports the procedure for unimplemented frames that is specified in TR 41449 then the tests in Sections B 9 5 1 will be executed Copyright 1991 AT amp T All Rights Reserved Appendix B 3 July 1 1991 8 If the IUT supports the p
62. is transferred to the outgoing signal by the CPE operating in loop timing mode The purpose of the transfer jitter test is determine how much the CPE attenuates the transfer of the input jitter to the output DS 1 signal while operating in loop timing mode 15 DACS Compatibility Test The Digital Access and Cross Connect System DACS is a digital terminal designed for the use with DS 1 facilities DACS is currently widely used in the AT amp T Switched Network The incoming DS 1 signal can be cross connected in three modes the DS 1 level the DS 0 level and the bit compression multiplexer bundle format The CPE is tested to determine if it will provide the proper framing and channelized signal to the DACS and for its operability with DACS 16 Superframe Synchronization Test The DACS doesn t maintain superframe integrity It will synchronize on the incoming 05 1 signal and generate a new framing pattern on the out going DS 1 signal This test determines if the CPE is dependent on superframe alignment for recovering information from the digital signal 17 Synchronization Tests The task of keeping all the entities in a digitally interconnected network operating at the same frequency so that no information is lost or repeated is referred to as network synchronization CPE clocks must meet the following synchronization requirements to ensure error free operation All CPE clocks that terminate or transfer timing must be stratifiable according to
63. l Rights Reserved 9 July 1 1991 REFERENCES CCITT Study Group XVIII Recommendation 1 412 ISDN User Network Interfaces Interface Structures and Access Capabilities Recommendation I 431 Primary Rate User Network Interface Layer 1 Specification Recommendation I 211 Bearer Services Supported by an ISDN December 1985 AT amp T Integrated Services Digital Network ISDN Primary Rate Interface and Special Applications Specification AT amp T TR 41459 Issue July 1989 Addenda January 1990 July 1990 November 1990 AT amp T Integrated Services Digital Network ISDN Primary Rate Interface Specification AT amp T PUB 41449 July 1989 ACCUNET T1 5 Service Description and Interface Specification AT amp T TR 62411 December 1990 Requirements for Interfacing Digital Terminal Equipment to Services Employing the Extended Superframe Format AT amp T TR 54016 September 1989 Copyright 1991 AT amp T All Rights Reserved CONTENTS APPENDIX A LAYER 1 TEST PLAN m nm HD t 18 19 20 21 22 23 A 1 SCOPE OF THIS APPENDIX A 2 ORGANIZATION A 3 GLOSSARY OF TERMS A 4 REQUIREMENT FOR COMPATIBILITY A 5 Preparation of for Input Jitter Tolerance Test ATTACHMENT 1 ACCUNET T1 5 CCR and M24 Test Procedure Introduction Network Connector Test Electrical Characteristics Test Framing Test Reframe Time Test
64. le Frame Established State stop timer T200 and start timer T203 Accept peer s request to transition into Multi Frame Established State while remaining in Awaiting Establishment State Inform peer that data link is not in the multiple frame operation mode field the FRMR is an implementation option or ignore Ignore errored I frames don t initiate error recovery in a state where multiple frame operation is not possible s All the tests in this section will execute the status check procedure described in Section B 7 Additionally the following preamble will also be executed PREAMBLE CONTEST PRI Sends IUT Sends DM gt F 1 lt SABME S5 P 1 The S denotes the state the IUT will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved Appendix B 6 July 1 1991 B 8 1 1 Valid Frames TEST M STATES 1 Purpose Transition into Multiple Frame Established State stop timer T200 and start timer T203 CONTEST PRI Sends IUT Sends UA gt 87 0 F 1 DISC gt P 1 lt UA ERREUR SR F 1 TEST M_STATES 2 Purpose Accept peer s request to transition into Multi Frame Established State while remaining in Awaiting Establishment State _ CONTEST PRI Sends IUT Sends 5 gt P 1 UA UA gt 57 0 F 1 DISC gt P 1 UA TEST M STATES 3 Purpose Inform peer that data link is not in the multiple frame oper
65. mes 8 6 Receive Sequence Number Test B 8 7 Timers B 8 7 1 Timer T200 B 8 7 2 Timer T203 B 9 CONDITIONAL TESTS B 9 1 TEI Assigned State S4 B 9 1 1 Valid Frames B 9 1 2 Inopportune Frames B 9 1 3 Invalid Frames B 9 2 Awaiting Release State S6 B 9 2 1 Valid Frames 9 2 2 Inopportune Frames B 9 2 3 Invalid Frames B 9 3 Sending RNR Frames B 9 3 1 Multiple Frame Established Busy State 57 2 9 3 2 Timer Recovery Peer and Own Receiver bese State 58 6 B 9 4 Send Sequence Number Tests B 9 5 Handling UI XID Frames Copyright 9 1991 AT amp T All Rights Reserved 1 A gt ND D ri pps B 9 5 1 Basic Capabilities 9 5 2 TEI Assigned State 54 9 5 3 Awaiting Release State S6 B 9 5 4 Multiple Frame Established Busy State S 2 9 5 5 Recovery Peer and Own Busy State 58 6 Copyright 9 1991 AT amp T All Rights Reserved d LIST OF TABLES TABLE 1 Selection of Tests Based on the Supported Capabilities Copyright 1991 AT amp T All Rights Reserved iii APPENDIX B LAYER 2 TEST PLAN B 1 SCOPE OF THIS APPENDIX This appendix describes the test scripts used to verify conformance to the Layer 2 procedures of the AT amp T ISDN PRI by a CPE These scripts specify tests to verify protocol procedures involving valid inopportune and invalid frames They also verify the implementation of proper rotation of
66. mes TEST M STATE7 0 13 Purpose Initiate re establishment upon receipt of a command frame with an undefined control field the FRMR is an implementation option XX is an undefined unrecognizable frame CONTEST PRI Sends IUT Sends gt lt FRMR F 0 lt SABME S5 P 1 VA gt F 1 a or T gt lt SABME S5 P 1 UA gt F 1 Copyright 1991 amp All Rights Reserved Appendix B 18 July 1 1991 TEST M STATE7 0 14 Purpose Initiate re establishment upon receipt of a frame with a long RR frame the FRMR is an implementation option CONTEST PRI Sends IUT Sends XX f gt lt FRMR F 0 lt SABME S5 P 1 UA gt F 1 or T gt lt SABME 55 P 1 UA gt L F 1 TEST M_STATE7 0 15 Purpose Initiate re establishment upon receipt of a frame with a long SABME frame the FRMR is an implementation option CONTEST PRI Sends IUT Sends XX gt lt FRMR F 0 lt SABME S5 P 1 UA gt F 1 or XX H gt lt SABME 55 P 1 UA gt a is along RR frame is a long SABME frame Copyright 1991 AT amp T All Rights Reserved Appendix B 19 July 1 1991 TEST M_STATE7 0 16 Purpose Initiate re establishment upon receipt of a frame with a long DISC frame the FRMR is an impl
67. ng T200 expires lt RR 58 4 eee t The S denotes the new state the will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved Appendix B 31 July 1 1991 B 8 4 1 Valid Frames TEST M_STATES 4 1 Purpose Re establish the data link and transition into multiple frame established mode CONTEST PRI Sends IUT Sends gt 1 UA 87 0 F 1 TEST M_STATES 4 2 Purpose Disconnect the data link _ CONTEST PRI Sends IUT Sends DISC gt P 1 lt UA S4 F 1 TEST 5 8 4 3 Exit timer recovery procedure transition into multiple frame established state CONTEST PRI Sends IUT Sends RR gt S7 0 F 1 DISC gt 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 32 July 1 1991 TEST M_STATES 4 4 Purpose Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore CONTEST PRI Sends IUT Sends DM gt F 1 lt SABME 55 P 1 UA gt S7 0 F 1 or DM gt Hgnore F 1 DISC gt 1 lt UA F 1 TEST M STATES 4 5 Purpose Acknowledge a valid I frame update its receive state variable V R CONTEST PRI Sends IUT Sends gt P 1 lt RR F 1 RR gt PR TEST STATES 4 6 Purpose Set its V A to the value N R transmit an RR response C
68. o TEI Assigned State and stop timer T200 CONTEST PRI Sends IUT Sends UA gt S4 F 1 DISC gt P 1 lt DM F 1 TEST C_STATE6 2 Purpose Transition into TEI Assigned State and stop timer T200 CONTEST PRI Sends IUT Sends DM gt S4 F 1 DISC gt P 1 lt DM 1 TEST C_STATE6 3 Purpose Report that link is in a state such that multiple frame operation is not possible CONTEST PRI Sends IUT Sends SABME gt 1 TEST C_STATE6 4 Purpose Acknowledge the DISC in order to permit its peer to disconnect the data link CONTEST PRI Sends IUT Sends DISC gt 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 59 B 9 2 2 Inopportune Frames TEST C STATE6 5 Purpose Ignore inopportune frames 2 CONTEST PRI Sends UA gt F 0 UA gt F 1 DISC gt P 1 TEST C_STATE6 6 Purpose Ignore inopportune frames CONTEST PRI Sends DM gt F 0 gt F 1 DISC gt P 1 TEST C_STATE6 7 Purpose Ignore inopportune frames CONTEST PRI Sends RNR gt P 0 UA gt F 1 DISC gt 1 Le usss IUT Sends Ignore S4 lt DM IUT Sends Hgnore S4 lt DM F IUT Sends Ignore 54 Copyright 1991 AT amp T All Rights Reserved July 1 1991 Appendix B 60 July 1 1991 TEST C_STATE6 8 Purpose Ignore inopportune frames CONTEST PRI S
69. opyright 1991 AT amp T All Rights Reserved Appendix B 9 TEST M_STATES 10 Purpose Ignore inopportune frames CONTEST PRI Sends gt P 0 UA gt F 1 DISC gt P 1 IUT Sends S7 0 lt UA F 1 Copyright 1991 AT amp T All Rights Reserved July 1 1991 Appendix B 10 July 1 1991 B 8 1 3 Invalid Frames TEST M_STATES 11 Purpose Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option or ignore CONTEST PRI Sends IUT Sends XX gt lt FRMR F 0 lt SABME P 1 UA gt 57 0 F 1 DISC gt P 1 lt UA F 1 or gt lt SABME P 1 UA gt 87 0 F 1 DISC gt 1 lt UA F 1 or XX gt Ignore DISC gt P 1 lt DM RS A ERA Dal is an undefined unrecognizable frame Copyright 1991 AT amp T All Rights Reserved Appendix B 11 July 1 1991 TEST M_STATES 12 Purpose Initiate re establishment upon receipt of a long frame the FRMR is an implementation option or ignore CONTEST PRI Sends IUT Sends gt lt FRMR F 0 lt SABME P 1 UA gt 87 0 F 1 DISC gt P 1 lt F 1 or gt lt SABME P 1 UA gt 67 0 F 1 DISC gt P 1 lt 1 or XX Ignore DISC gt P 1 lt DM F 1 XX is a long UA f
70. r recovery procedures with reject exception condition set 2 T200 value and proper T200 timer expiry N200 value and proper retransmission of a frame 3 4 203 value and proper T203 timer expiry 5 Timer expiry recovery procedures in which it will stop timer 1203 after its first expiry and start timer T200 Copyright 1991 AT amp T All Rights Reserved Perform proper T200 timer recovery procedures with reject exception condition set IUT Sends CONTEST PRI Sends I with invalid N S gt REJ S7 1 RNR gt P 1 lt 57 5 F 1 Do Nothing T200 expires lt RR 58 5 P 1 RR gt 57 0 Jiu SENDEN END E RR July 1 1991 Appendix B 47 TEST 2 T200 value and proper T200 timer expiry CONTEST PRI Sends RNR gt P 1 Do Nothing RR gt TEST M_TIMER 3 N200 value and proper retransmission of a frame CONTEST PRI Sends RNR gt P 1 Do Nothing Do Nothing UA gt F 1 IUT Sends lt RR 87 4 F 1 T200 expires lt RR S8 4 P 1 Sends lt RR 67 4 F 1 T200 expires lt RR 58 4 P 1 T200 expires N200 Times lt SABME 55 P 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 48 July 1 1991 B 8 7 2 Timer T203 TEST M_TIMER 4 203 value and proper T203 timer expiry CONTEST PRI Sends IUT Sends SABME gt
71. rame with F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 12 July 1 1991 TEST M_STATES 13 Purpose Ignore errored I frames don t initiate error recovery in a state where multiple frame operation is not possible CONTEST PRI Sends IUT Sends I with invalid N S gt Hgnore UA gt S7 0 F 1 DISC gt P 1 lt UA TEST M_STATES 14 Purpose Ignore errored I frames don t initiate error recovery in a state where multiple frame operation is not possible CONTEST PRI Sends IUT Sends I with invalid N R gt Ignore TA 57 0 F 1 DISC gt P 1 lt UA F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 13 July 1 1991 B 8 2 Multiple Frame Established Normal State S7 0 lt __ Purpose of Test Test M_STATE7 0 Verify IUT 1 Restart the data link when already in multiple frame operation mode 2 Disconnect the data link 3 Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore 4 Acknowledge receipt of a valid Information frame 1 5 Respond to a normal status check of the data link 6 Report that it is not in an own receiver busy condition 7 Report its current V R val 7 Report its current VR value 8 Initiate re establishment knowing that retransmission of a frame will not clear an error condition 9 Initiate
72. re Q 931 messages that are syntactically valid but are sent to the TUT in an improper state iii Invalid messages These are messages with syntax that does not conform to the Q 931 specifications For each test the CONTEST PRI will e initialize the IUT into one of the ten possible reportable states and compare the response from the IUT to the expected message if any The following is the list of the reportable states which can be tested Copyright 9 1991 AT amp T All Rights Reserved 4 July 1 1991 Call Tnitiated Outgoing Call Proceeding Call Delivered Call Received Connect Request Incoming Call Proceeding Disconnect Indication Release Request These tests will be done for maintenance call control channel negotiation sending and receiving of user to user information NFAS and D channel backup procedures In addition to the above tests Layer 3 tests also verify the implementation of proper handling of timers and supported Network provided features and services Layer 3 tests rely heavily on the RESTART and STATUS ENQUIR Y messages and on proper IUT response to them through the RESTART ACKNOWLEDGE and STATUS messages respectively The processing of these messages is mandatory and without proper operation of these messages and associated actions further testing is not possible 3 REMOTE TESTING OF PRI CPE Associated with CONTEST PRI AT amp T offers a remote testing capability to vendors as
73. right 9 1991 AT amp T All Rights Reserved Appendix B 28 July 1 1991 TEST M_STATE7 1 11 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends RR gt Ignore P 0 DISC gt P 1 lt UA F 1 TEST M_STATE7 1 12 Purpose Ignore inopportune frames CONTEST PRI Sends IUT Sends REJ gt Ignore P 0 DISC gt P 1 UA F 1 B 8 3 3 Invalid Frames TEST M_STATE7 1 13 Purpose Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option CONTEST PRI Sends IUT Sends XX gt lt FRMR F 0 lt SABME S5 P 1 UA gt S7 0 F 1 or XX gt lt SABME S5 P 1 87 0 ern nm XX is an undefined unrecognizable frame Copyright 1991 AT amp T All Rights Reserved Appendix B 29 July 1 1991 TEST M STATE7 1 14 Purpose Reject an I frame with an invalid N S and report the value of its V R CONTEST PRI Sends IUT Sends I with invalid N S gt P 1 TEST M STATE7 1 15 Purpose Initiate re establishment upon receipt of an invalid N R value the FRMR is an implementation option CONTEST PRI Sends IUT Sends I with invalid N R gt P 0 FRMR F 0 lt 5 S5 P 1 UA gt S7 0 F 1 I with invalid N R gt P 0 lt SABME 55 P 1 UA gt S7 0 RES See Copyright 1991 AT amp
74. rocedure for unimplemented frames that is specified in TR 41449 and can remain TEI Assigned State long enough then the tests in Section B 9 5 2 will be executed 9 If the IUT supports the procedure for unimplemented frames that is specified in TR 41449 can send a DISC frame on demand then the tests in Section B 9 5 3 will be executed 10 If the IUT supports the procedure for unimplemented frames that is specified in TR 41449 and can send a RNR frame in Multiple Frame Established State then the tests in Section B 9 5 4 will be executed 11 If the IUT supports the procedure for unimplemented frames that is specified in 41449 and can send a RNR frame in Timer Recovery State then the tests in Section B 9 5 5 will be executed The selection rules listed above are represented in the following table TABLE 1 Selection of Tests Based on the Supported Capabilities CAPABILITY TEST GROUP Basic M STATES M STATE7 0 STATE7 1 M STATES8 4 M STATES 5 M RCVSEQ M TIMER Stay in State 4 C STATEA Send a DISC Frame C STATE6 Send RNR frame in State 7 2 C STATE7 2 Send RNR frame in State 8 6 C STATES 6 Send I frame on demand C SNDSEQ Handling of Basic C UIXID 1 C UIXID 10 unimplemented Stay in State 4 C UIXID 11 C UIXID 12 frames Send a DISC Frame C UIXID 13 C UIXID 14 Send RNR frame in State 7 2 C UIXID 15 C UIXID 16 Send RNR frame in State 8 6 C UIXID 17 C UIXID 18 Copyright 9
75. rpose Acknowledge a valid I frame update its receive state variable V R CONTEST PRI Sends gt 1 RR gt F 1 TEST STATES 5 6 IUT Sends lt RR 58 4 J Purpose Respond to inquiry but don t clear timer recovery condition until get RR F 1 CONTEST PRI Sends RR gt P 1 RR gt F 1 IUT Sends lt RR S8 1 F 1 Copyright 1991 AT amp T All Rights Reserved Appendix B 40 July 1 1991 TEST M_STATES 5 7 Purpose Respond to inguity but don t clear timer recovery condition until get RR F 1 CONTEST PRI Sends IUT Sends RNR gt P 1 lt RR F 1 RR gt F 1 ZUM TEST STATES 5 8 Purpose Respond to inquiry but don t clear timer recovery condition until get RR F 1 CONTEST PRI Sends IUT Sends REJ gt P 1 lt RR 58 1 F 1 RR gt LF 1 TEST M_STATES 5 9 Purpose Initiate re establishment CONTEST PRI Sends IUT Sends FRMR gt F 1 lt SABME 85 P 1 UA gt 57 0 Fal TEST M STATES 5 10 Purpose Initiate re establishment upon receipt of an unsolicited UA or ignore the unsolicited UA ss CONTEST PRI Sends IUT Sends UA gt F 1 lt SABME 85 P 1 UA gt 87 0 F 1 or UA gt Hgnore F 1 Copyright 1991 AT amp T All Rights Reserved LS Appendix B 41 B 8 5 2 Inopportune Frames TEST 8 8 5 11 Purpose
76. signal indicate that the applied jitter is beyond the IUT s input jitter tolerance 2 The IUT routes the input signal to a second DS 1 interface This method may circumvent two potential obstacles a While the IUT s administrative software may rule out looping channels on themselves as with the first method this method may make more sense to the TUT s administrative software b If the TUT cannot produce AMI line coding without ZCS the first method can not be made to work since the IUT s ZCS mechanism would alter some bits to enforce the pulse density constraint However it is acceptable for the IUT to recover the AMI coded QRTS signal and then retransmit on another DS 1 interface using B8Z5 line coding 1 The QRTS is defined in TR 62411 2 Older documents refer to Superframe Format SF framing and formatting as D3 D4 or D3 D4 Copyright 1991 AT amp T All Rights Reserved Appendix A 3 July 1 1991 As with method 1 the connection through the TUT must be made in such a way that proper operation of the signal recovery and clock recovery circuits can be observed Although the framing bits may be shifted in the output signal the remaining 192 bits in each frame should be unaltered Again all 24 channels must be switched through each with equal delay Any errors detected in the output signal indicate that the applied jitter is beyond the IUT s input jitter tolerance It is acceptable for the vendor to make temporary circui
77. stratum levels defined in Copyright 1991 AT amp T All Rights Reserved Appendix A 6 July 1 1991 Technical Reference 62411 CPE clocks that terminate timing must meet free run accuracy and pull in range requirements CPE clocks that transfer timing must meet accuracy and pull in range requirements as well as maximum time interval error requirements Stratum 2 and 3 clocks must have duplicated timing hardware and an external timing port available 17 1 Holdover or Free Run Accuracy Test The holdover or free run accuracy test checks the CPE clock s stability during extended loss of both primary and secondary timing references 17 2 Clock Pull in Range The clock pull bin range test measures the frequency over which a CPE clock will be able to synchronize and maintain lock 17 3 Time Interval Error Tests The time interval error tests measure the maximum phase movement and phase slope of a CPE clock when the clock undergoes any rearrangement activity such as reference switching or changeover of active synchronization hardware 18 DS 0 Channelization Test The network assumes that the DS 0 signals are placed in the DS 1 signal using a specified format This test determines if the CPE conforms to the channelization of DS 0 signal in the DS 1 signal A check is made to see if the 05 0 signal are composed of 24 eight bit time slots and placed in sequential order in the DS 1 signal stream 19 A and B Bit Signaling Test A and B robb
78. t changes in the TUT so that one of these methods can be used such that the signal recovery and clock recovery circuits remain unaltered If such changes are needed the vendor should make them and verify their effectiveness before presenting the TUT for testing Copyright 1991 AT amp T Rights Reserved Appendix 4 July 1 1991 ATTACHMENT 1 ACCUNET T1 5 CCR and M24 Compatibility Test Procedure 1 Introduction This document gives a brief description of the tests for compatibility testing of Customer Premises Equipment CPE with the AT amp T ACCUNET family of 1 5 Mbps digital services T1 5 CCR and M24 complying with Technical Reference PUB 62411 December 1988 2 Network Connector Test An inspection of the CPE is made to determine if one or more of the approved network connectors is provided 3 Electrical Characteristics Test To function properly with the network the CPE is required to transmit a signal with a specified waveform A check is made to confirm that the output signal of the CPE conforms to the pulse waveform template The power levels at 772 KHz and 1 544 MHz of an all ones signal transmitted by the CPE is also checked 4 Framing Test Two types of framing patterns are currently supported by AT amp T SF and ESF This set of tests check for the presense of either the SF pattern or the ESF pattern Also for the case of ESF the CRC 6 is checked The test of the 4 kb s data link is made as a part
79. t group CONTEST PRI has been designed so that tests within a test group can be executed individually Each test group contains a table that summarizes the purpose of the tests included in that test group The Layer 2 test scripts are presented in tabular format as in the following example Copyright 1991 AT amp T All Rights Reserved Appendix B 2 July 1 1991 TEST M STATES 3 Purpose Inform peer that data link is not in the multiple frame operation mode CONTEST PRI Sends IUT Sends DISC gt 1 lt DM F 1 UA gt 57 0 F 1 DISC gt P 1 lt UA F 1 The table indicates the frames CONTEST PRI and the TUT will send The status of P F bit is also noted The state the IUT is expected to be in after receiving or sending a frame is noted in parentheses preceded by the letter S e g S7 0 When CONTEST PRI starts execution of a specified test it will check the status of the data link layer and bring the link to Multiple Frame Established Normal state This procedure is described in Section B 7 After that CONTEST PRI will exchange a certain sequence of frames with the TUT This exchange is the required Preamble for the selected test which will move the TUT into the required state for the test Then CONTEST PRI will follow through the exchange of frames identified for the selected test B 5 TESTING REQUIREMENTS ON IUT Testing in accordance with this test plan requires that the TUT have provis
80. t upon receipt of a frame with an undefined control field the FRMR is an implementation option Reject frame with an invalid N S and report the value of its V R Initiate re establishment upon receipt of an invalid N R value the FRMR is an implementation option All the tests in this section will execute the status check procedure described in Section B 7 Additionally the following preamble will also be executed PREAMBLE CONTEST PRI Sends IUT Sends I with invalid N S gt f The S denotes the new state the IUT will be in after sending this frame Copyright 1991 AT amp T All Rights Reserved Appendix B 25 B 8 3 1 Valid Frames TEST M_STATE7 1 1 Purpose Clear reject exception condition and re establish the data link CONTEST PRI Sends IUT Sends SABME gt P 1 lt UA 87 0 F 1 TEST M STATE7 1 2 Purpose Clear reject exception condition and disconnect the data link CONTEST PRI Sends IUT Sends DISC gt P 1 lt UA S4 F 1 TEST M STATET 1 3 Purpose Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore CONTEST PRI Sends IUT Sends DM gt 1 lt SABME 55 P 1 UA gt S7 0 F 1 or DM gt Ignore F 1 DISC gt P 1 lt UA Copyright 1991 AT amp T All Rights Reserved Appendix B 26 July 1 1991
81. test procedures Such technical descriptions are intended to be in agreement with TR 41449 and TR 41459 which remain the authoritative references regarding AT amp T ISDN PRI 1 3 Organization The remainder of this section identifies the target audience for the test plan and the terminology used in other parts of the test plan Section 2 provides a general overview of the test plan Some of the tests can be executed from a remote location using the remote test unit called CONTEST RTU A description of the remote testing capabilities are presented in Section 3 Capabilities not covered by the test plan are identified in Section 4 Section 5 lists some of the requirements placed on the IUT in order to complete the tests Appendicies A B and C contain the test cases to be used for testing the physical layer Layer 2 and Layer 3 protocols procedures respectively Appendix D contains the users manual for using CONTEST RTU Finally Appendix E contains the CPE interoperability questionnaire which is used in preparing for a test session 1 4 Audience This test plan is intended for the vendors and developers of ISDN CPE 1 Older documents refer to Superframe Format SF framing and formatting as D3 D4 or D3 D4 2 Some features such as equal access are specific to Local Exchange Carriers are not within the scope of TR 41459 Therefore such features are not covered in this test plan Copyright 1991 AT amp T All Rights Reserved 1 5 Terminolog
82. the unsolicited UA CONTEST PRI Sends IUT Sends UA gt F 1 SABME 55 P 1 UA gt 87 0 F 1 FT or UA gt Hgnore B 9 3 1 2 Inopportune Frames TEST C STATE7 2 10 Purpose Ignore inopportune frames _ CONTEST PRI Sends IUT Sends RNR gt S7 6 P 0 RR gt P 0 DISC gt P 1 TEST STATE7 2 11 Ignore inopportune frames CONTEST PRI Sends IUT Sends RR gt Ignore P 0 DISC gt P 1 lt P Copyright 1991 AT amp T All Rights Reserved Appendix B 68 TEST C_STATE7 2 12 Purpose Ignore inopportune frames CONTEST PRI Sends REJ gt P 0 DISC gt P 1 B 9 3 1 3 Invalid Frames TEST C STATE7 2 13 IUT Sends Ignore lt UA PE July 1 1991 Purpose Initiate re establishment upon receipt of a frame with an undefined control field the FRMR is an implementation option CONTEST PRI Sends gt gt UA gt F 1 TEST C_STATE7 2 14 IUT Sends lt FRMR F 0 lt SABME 55 P 1 57 0 lt SABME 55 P 1 57 0 Purpose Discard an I frame with an invalid N S and report the value of its V R respond with RNR CONTEST PRI Sends I with invalid N S gt P 1 is an undefined unrecognizable frame IUT Sends Copyright 9 1991 AT amp T All Rights Reserved Appendix B 69 July 1 199
83. to correctly calculate and decode Cyclic Redundancy Codes CRC 6 is tested during this test A repeating bit pattern is input to the dropside of the CPE On the network side the test bed verifies whether the CPE generates the correct CRC for this bit pattern 3 Part H Maintenance and Alarm Tests 3 1 Yellow Alarm DS1 terminal equipment must transmit a yellow alarm after a fixed period of time if the equipment is unable to synchronize on the 1051 signal from the network The test bed sends an unsynchronizable signal to the CPE and monitors the signal from the CPE for the yellow alarm The specific criteria for declaring yellow alarm are described in the ACCUNET T1 5 interface specification TR62411 BD DS1 through equipment such as CSUs should pass a yellow alarm signal in either direction 3 2 Alarm Indication Signal Blue Signal If the CPE under test is not DS 1 terminal equipment it must transmit an Alarm Indication Signal AIS after detecting a Loss of Signal LOS from the terminal equipment on its DTE side For more information on AIS and LOS see TR62411 3 3 3 Loopbacks The CPE should pass in and out of payload loopback PLB and line loopback LLB states as commanded by the network The test bed sends in band and maintenance message loopback signals to the CPE and monitors the CPE s response For more information on loopbacks see TR62411 5 Older documents refer to Superframe Format SF framing and formatting as D3
84. urpose Ignore errored T frames don t initiate error recovery in a state where multiple frame operation is not possible CONTEST PRI Sends IUT Sends I with invalid N S gt Ignore UA gt 54 F 1 DISC gt 1 lt DM L gt Soo TEST C STATE6 14 Purpose Ignore errored I frames don t initiate error recovery in a state where multiple frame operation is not possible CONTEST PRI Sends IUT Sends I with invalid N R gt Ignore UA gt S4 F 1 DISC gt P 1 lt DM Copyright 1991 amp All Rights Reserved Appendix B 64 July 1 1991 B 9 3 Sending RNR Frames B 9 3 1 Multiple Frame Established Busy State S7 2 These tests are included for an IUT which can be configured to send RNR frames Since it is not required that an IUT support this feature these tests are optional However if this feature has been implemented these tests are mandatory Purpose of Test Verify TUT can 1 Re establish the data link and clear its own receiver busy condition 2 Disconnect the data link 3 Initiate re establishment upon indication that its peer is not in multiple frame operation mode or ignore 4 Discard received frame after updating its acknowledge state variable V A respond with RNR 5 7 Process all received supervisory frames updating its acknowledge state variable V A respond with RNR 8 Init
85. y 2 July 1 1991 CCITT International Telegraph and Telephone Consultative Committee CONTEST PRI CONformance TEST system for PRI CONTEST RTU CONformance TEST Remote Test Unit CPE Customer Premise Equipment ESF Extended Superframe Format IUT Implementation Under Test ISDN Integrated Services Digital Network LAPD Link Access Procedures on the D channel NFAS Non Facility Associated Signaling OSI Open System Interconnection PRI Primary Rate Interface SF Superframe Format 2 GENERAL DESCRIPTION OF TEST SUITES Detailed tests for each set of procedures and protocols for the three layers that will be tested by CONTEST PRI are provided in the appendicies to this document Each set of capabilities is tested individually while disabling other testing capabilities Thus while testing the Layer 3 Q 931 protocol CONTEST PRI will not test LAPD procedures The tests described in this document are either mandatory or conditional 1 mandatory successful completion of these tests are required for minimal compatibility 2 conditional successful completion of these tests are required if the IUT has implemented the associated capability feature or service For physical layer compatibility the test plan identifies the mandatory tests All Layer 2 and Layer 3 tests are named with a prefix Mandatory tests have the prefix M and conditional tests have the prefix C Tests for optional procedures for optional capability feature or service have th

(isdn) primary rate interface test plan for customer premises

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