Service Manual
Contents
1. Wiring Connections Table 2 2 shows the wiring connections between the MAU and the Test Jack or RMU CTU modem telephone line and the Monitor Access Line Figure 2 2 shows the numbering of the MAU connector pins 1 Route or dress the MAU ground and connector wires to conform with the other internal wiring of the cabinet Use plastic cable ties as necessary 2 Reinstall the MAU fuse 3 The green POWER LED on the MAU should be on and the green STATUS LED should begin winking All other LEDs should be dark Each time power is re applied to MAU it will perform a series of power on self tests While MAU is performing these self tests the front panel STATUS LED will flash at twice its normal rate 8 times second Upon completion MAU will revert to its normal STATUS LED blink rate of 4 times second provided that all tests were performed successfully OQ GRN WHT WHT GRN RED WHT ORG WHT BLU WHT BRN WHT BLK ORN WHT BLU WHT O BLU RED RED BLU SLT WHT WHT SLT BRN SLT mau_007 Figure 2 2 Cable Connector Pin Identification as Viewed from Receptacle End Should a failure occur MAU will flash the appropriate failure code s using the STATUS LED Refer to Table 2 3 for a description of all failure codes or contact Harris Professional Services Each code has a unique tens and ones digit associated with it MAU will provide a failure code followed by a long2. 2 4 Installation Metallic Access Unit GTD 5 Table 2 2 Wiring Connections Pin Color Description 4 WHT GRN Test Jack Out Tip 5 GRN WHT Test Jack Out Ring 10 WHT BRN Test Jack in Tip 11 BRN WHT Test Jack in Ring 1 WHT BLU 4 TEL Test Jack Out Tip 6 BLU WHT 4 TEL Test Jack Out Ring 12 WHT SLT 4 TEL Test Jack In Tip 13 SLT WHT 4 TEL Test Jack In Ring 3 RED 48 Volts 8 BLACK Ground 9 WHITE Alarm 2 WHT ORN Modem Line Tip 7 ORN WHT Modem Line Ring 14 RED BLU Modem Access Tip 15 BLU RED Modem Access Ring GND GREEN ESD and Line Conditioning Ground Notes 1 Alarm condition closes a relay contact between the ALARM lead pin 9 and the GROUND lead pin 8 2 Modem and Monitor lines should be standard POTS lines 3 Connect to frame ground Note The connection of the alarm wire from the MAU to the RT unit is optional This wire is normally open but if a failure occurs within the MAU the wire will be a ground potential Metallic Access Unit GTD 5 N Identify the Carrier System s battery 48 Volt DC and ground power terminals Connect the two power wires from the MAU to these terminals RED MAU BLK MAU Identify the MAU Alarm wire and attach to the Carrier System s alarm Battery Ground CAUTION Use caution when working with these power wires as there may be high voltage present monitoring point WHT MAU Installation 2 5
3. mau 003 Figure 1 1 MAU Applications Diagram 1 2 Overview Metallic Access Unit GTD 5 Location The MAU is installed in the same cabinet or enclosure with the terminating Pair Gain equipment at the Remote Terminal RT location It may be mounted either horizontally or vertically in any available 11 4 inches wide by 19 or 23 inch mounting space and is provided with a cable and connector a ground wire with a terminal electrical connectors and mounting brackets with screws Functions The MAU performs the following functions m Serves as a remote DATU under the control of the main DATU within the RT System located in the Central Office CO and provides all the standard DATU idle and busy line functions These functions are described in the DATU RT Service Manual Oll 724820 005 m Provides full compatibility with test jack configurations of various centralized test systems through normally made relay contacts for full tip and ring DC continuity between the remotely located 4 TEL Remote Measurement Unit RMU if equipped and the Channel Test Unit CTU m Provides the line conditioning necessary to utilize other manufacturers test equipment i e DynaTel etc m Provides various administrative reports that may be obtained directly from the MAU through a telephone line data terminal and 300 or 1200 baud modem without tying up the RT system located in the CO Metallic Access Unit GTD 5 Overview 1 3
4. 0000 Low Level Tone Timer 2 0000 Hold Test Timer 0000 MAU Access Timer 0000 Enter command or cr for menu To Clear All Timers 1 From the Timer Menu press B 3 6 Administrative Reports Metallic Access Unit GTD 5 2 The Clear All Timers message will be displayed Clear All Timers Are you sure Y N 3 If Yes is selected then the All Timers Cleared message will be displayed All Timers Cleared Enter command or lt cr gt for menu 4 If any key other than Y is selected then the No Action Taken message will be displayed No Action Taken Enter command or cr for menu To Clear An Individual Timer 1 From the Timer Menu press the appropriate letter to clear the desired timer reading 2 The Clear appropriate Timer message will be displayed Clear Appropriate Timer Are you sure Y N 3 If Yes is selected then the Appropriate Timer Cleared message will be displayed Appropriate Timer Cleared Enter command or cr for menu 4 If any key other than Y is selected then the No Action Taken message will be displayed No Action Taken Enter command or cr for menu To Perform All Diagnostics 1 From the Main Menu press D The Diagnostics Menu will be displayed Metallic Access Unit GTD 5 Administrative Reports 3 7 EE ET EEZT E IEIZB TTT ITI EETIIILIEEBIIIIII IIENEEE Diagnostics Menu a A
5. This page intentionally left blank 1 4 Overview Metallic Access Unit GTD 5 Installation Contents Considerations for Installation 2 2 MAU Components 2 2 MAU Installation Kit 2 3 Hand Tools Required 2 3 Installation 2 3 m Mechanical Installation 2 3 m Electrical Installation 2 4 Metallic Access Unit GTD 5 Installation 2 1 Considerations for Installation Each MAU requires two POTS lines for modem access and monitoring These lines for best performance should be translated as Calling Party Control with quick time out see Figure 2 1 From MDF From MDF From MDF To Test Pair o Ua utto um T 10 12 T I lee Test Jack In R 11 a3 R __ 4 TEL Test Jack In rcu ME 4 TEL SS ey Metallic RMU MAU Modem i R 7 Access e J Unit RENNES T 14 Monitor Access i R 15 m 9 4 Vet Se uu ee T 4 1 T 4 Test Jack Out R 5 6 R 4 TEL Test Jack Out n ia T MERE REUTERS NUM EON a 8 3 9 GND Ground 48 VDC Alarm GND To Frame Ground MAU Components 2 2 Installation Figure 2 1 MAU Connections The MAU and the mounting hardware includes the following items One Cable Assembly attached to MAU with 12 AWG Solid 12 feet long Three Mounting Brackets MAU to Cabinet Rack one long Mounting Bracket and two Short Mounting Brackets Ten Mounting Screws six Mounting Brackets two spares to MAU and four Mo
6. appropriate Counter message will be displayed Clear Appropriate Counters Are you sure Y N 3 If Yes is selected then the Appropriate Counter Cleared message will be displayed Appropriate Counter Cleared Enter command or cr for menu 4 If any key other than Y is selected then the No Action Taken message will be displayed No Action Taken Enter command or cr for menu To Read or Clear Timers 1 From the Main Menu press B 2 The Timer Menu will be displayed Timer Menu a Read All Timers b Clear All Timers c Clear Open Line Timer d Clear Short Line Timer e Clear Short to Ground Timer f Clear Tip Ground Timer g Clear Ring Ground Timer h Clear Tip Tone Timer i Clear Ring Tone Timer Metallic Access Unit GTD 5 Administrative Reports 3 5 5 j Clear Tip and Ring Tone Timer k Clear Low Level Timer l Clear Hold Test Timer m Clear MAU Access Timer n Return to Main Menu o Disconnect Enter command or cr for menu To Read All Timers 1 From the Main Menu press A 2 The Read All Timer information will be displayed Timer HHHH MM Open Line Timer 2 0000 Short Line Timer 1 0000 Short to Ground Timer 2 0000 Tip Ground Timer 2 0000 Ring Ground Timer 0000 Tip Tone Timer 1 0000 Ring Tone Timer 0000 Tip and Ring Tone Timer
7. From the Main Menu press C 2 The Version Information and Main Menu will be displayed Metallic Access Unit Model 24845 001 Firmware Number 907 722430 001 Release date 10 91 Verifying Checksum Checksum Verified Checksum nnnnnn Main Menu a Read or Clear Counters b Read or Clear Timers c Display Version Information d Perform Diagnostic Functions e Disconnect Enter command or lt cr gt for menu To Disconnect Note Returning to the Main 1 From any menu press X Menu from any submenu is accomplished by pressing R Metallic Access Unit GTD 5 Administrative Reports 3 9 2 The Disconnect message will be displayed Disconnect Are you sure Y N 3 If Yes is selected then the Goodbye message will be displayed Goodbye 4 If any key other than Y is selected then the Enter Command message will be displayed Enter command or cr for menu 5 Toredisplay the current menu press Enter 3 10 Administrative Reports Metallic Access Unit GTD 5 Maintenance Contents Serviceable Parts 4 2 Metallic Access Unit GTD 5 Maintenance 4 1 Serviceable Parts There is only one field serviceable part in the MAU and it is an externally accessible fuse The fuse is a standard 1 2 amp 250 Volt slow blow cartridge type and may be obtained at any electronics store or ordered directly from Harris Corporation 4 2 Maintenance Metallic Access Unit GTD 5 Warranty and Re
8. the other bracket on 5 Mount the MAU either horizontally or vertically to the cabinet rack with the opposite side of MAU Use two screws on each side the short bracket for 19 inch or the long bracket for 23 inch installations Electrical Installation Use the following procedure for electrical installation 1 Remove the MAU fuse from its holder and temporarily store in a safe place 2 Loosen a screw from the grounding strip or clamp of the cabinet enough to insert the terminal open ended spade of the green ground wire beneath screw head Then retighten the screw 3 In the following paragraphs abbreviations of lead colors will be used These abbreviations are listed in Table 2 1 Table 2 1 Color Abbreviations Abbreviations Color BLK Black BLU Blue GRN Green ORN Orange RED Red WHT White BRN Brown SLT Slate 4 Connect the eight wires 4 Tip and Ring pairs for the Test Jack In 4 TEL Test Jack In 4 TEL Test Jack Out and Test Jack Out to the MAU see Table 2 2 with the pressure crimping connectors by wire wrapping or other suitable method 5 Connect the four wires 2 Tip and Ring pairs for the Modem and Monitor Access lines to the MAU see Table 2 2 with the pressure crimping connectors by wire wrapping or other suitable method 6 Replace the 3B1E black protectors as appropriate associated with the telephone lines to from the MAU with the 3B2E green protectors
9. HARRIS Communications Products Division Metallic Access Unit MAU GTD 5 Model 24845 001 next level solutions Servi Manual A No part of this publication may be reproduced stored on a retrieval system or transmitted in any form or by any means electronic mechanical photocopying recording or otherwise without the prior written permission of Harris Corporation The use of trade marks or other designations is for reference purposes only NOTICE Harris Corporation makes no warranties about this document Harris Corporation reserves the right to make hardware and software changes to the product described within this document without prior notice and without obligation to notify any person of such revision or change TRADEMARKS 4 TEL is a registered trademark of Teradyne Corporation DynaTel is a trademark of 3M Corporation www harris com 1 800 437 2266 HARRIS Communications Products Division 809 Calle Plano Camarillo CA 93012 8519 USA 1991 Harris Corporation next levels lutions Written Printed in USA Oll 724840 005 Issue 2 May 2000 ee Contents ee 1 Overview 1 1 a Description 1 2 m Location 1 3 m Functions 1 3 m pA Installation 2 1 m Considerations for Installation 2 2 a MAU Components 2 2 a MAU Installation Kit 2 2 a Hand Tools Required 2 3 m installation 2 3 ee 3 Administrative Reports 3 1 m Description 3 2 Procedures 3 2 sss 4 Maintenanc
10. d All Counters 1 From the Counter Menu press A Metallic Access Unit GTD 5 Administrative Reports 3 3 2 The Read All Counter information will be displayed Open Line Counter 0000 Short Line Counter 2 2 2 0000 Short to Ground Counter 0000 Tip Ground Counter 0000 Ring Ground Counter 2 2 2 0000 Tip Tone Counters 0000 Ring Tone Counter 0000 Tip and Ring Tone Counter 0000 Low Level Tone Counter 0000 Audio Monitor Counter 0000 Hold Test Counter 0000 MAU Access Counter 0000 Enter command or cr for menu To Clear All Counters 1 From the Counter Menu press B 2 The Clear All Counters message will be displayed Clear All Counters Are you sure Y N 3 If Yes is selected then the All Counters Cleared message will be displayed All Counters Cleared Enter command or cr for menu 4 If any key other than Y is selected then the No Action Taken message will be displayed No Action Taken Enter command or cr for menu 3 4 Administrative Reports Metallic Access Unit GTD 5 To Clear An Individual Counter 1 From the Counter Menu press the appropriate letter to clear the desired counter reading 2 The Clear
11. e 4 1 m Serviceable Parts 4 2 ee 5 Warranty and Repair Policy 5 1 a Warranty 5 2 a Non Warranty 5 2 a Return of Equipment 5 3 This page intentionally left blank Overview Contents Description 1 2 Location 1 3 Functions 1 3 Metallic Access Unit GTD 5 Overview 1 1 Description The Metallic Access Unit MAU is one of the two component parts of the Harris DATU RT Line Conditioning System that extends the technician s testing capabilities on standard subscriber lines through the non metallic environment of a Pair Gain System see Figure 1 1 The other component of the RT System is the Direct Access Test Unit Remote Terminal DATU RT Typical Pair Gain Systems include the RSU RLU MXU etc While the MAU is shown sharing a test jack with 4 TEL it is possible that the 4 TEL may not be installed or may have its own test jack CENTRAL OFFICE HARRIS CO SWITCH TJ or ETJ DATU RT g 24820 005 Test Line ICIC RS232 Serial Line POTS Line Access line CU CHANNEL UNIT DATU DIRECT ACCESS TEST UNIT MAU METALLIC ACCESS UNIT MUX MULTIPLEXER TJ TEST JACK ETJ EXTENDED TEST JACK COT CENTRAL OFFICE TERMINAL ICIC INTELLIGENCE COMMUNICATIONS INTERFACE CONTROLLER Fiber Cable Radio Satellite gt lt POTS Line Test Jack In Out L METALLIC ACCESS UNIT 4 TEL 4 TEL Test 24845 005 Jack In Out HARRIS C Line Under Test
12. er LED off inter digit period MAU will then provide a second series of short LED on flashes indicating the ones digit of the failure code MAU will continue in this fashion until all codes have been displayed at which point the STATUS LED will be returned to its normal blink rate 4 On a working telephone line dial the modem telephone line of the MAU 5 The modem should answer and send a modem answer tone This verifies that the MAU is operational The green MODEM LED should come on The MAU installation is complete 2 6 Installation Metallic Access Unit GTD 5 Table 2 3 Power On Self Test with Failure Codes Failure Code Power On Self Test Memory Test RAM Memory Test ROM Memory Test EEROM al wla Modem Analog Loop Back Test Open Line Test Short Line Test Short to Ground test Tip Ground Test aJ AJON Ring Ground Test Tip Tone Test Ring Tone Test Tip and Ring Tone Test Low Level Tone Test Audio Monitor Audio Absent Test AJAJAJ AJAJAJ WO oO wo w w p OJJA wl Pp Audio Monitor Audio Present Test LED Status The status of the MAU may be determined by viewing the five LEDs see Table 2 4 Table 2 4 LED Status LED Function Label Color Alarm Red Off No Alarm Condition On Alarm condition exists within MAU Modem Green Off Modem idle O
13. ll Diagnostic Tests b Open Line Test c Short Line Test d Short to Ground Test e Tip Ground Test f Ring Ground Test g Tip Tone Test h Ring Tone Test i Tip and Ring Tone Test j Low Level Tone Test k Audio Monitor Test Return to Main Menu m Disconnect Enter command or cr for menu 2 To perform all diagnoistics press A The following screen will be displayed with a result of either PASS or FAIL for each test Processing Test Function Result Open Line Test 2 PASS Short Line Test 2 2 2 PASS Short to Ground Test PASS Tip Ground Test PASS Ring Ground Test PASS Tip Tone Test 1 PASS RingTone Test 2 PASS Tip and Ring Tone Test 2 PASS Low Level Tone Test 8 PASS Audio Monitor Test PASS Audio Absent Test 2 PASS Audio Present Test PASS 3 8 Administrative Reports Metallic Access Unit GTD 5 Enter command or lt cr gt for menu To Perform An Individual Diagnostic Test 1 From the Diagnostics Menu press the appropriate letter to select the desired diagnostic function 2 The Diagnostic Test message will be displayed Appropriate Test PASS FAIL Enter command or lt cr gt for menu To Display Version Information MAU also performs a System Memory Test and displays the results 1
14. n Modem in use Power Green Off No Power On Power Available Status Green Off No Power Winking MAU is functioning normally Test Pair Yellow Off MAU not accessing Test Jack On MAU accessing Test Jack Metallic Access Unit GTD 5 Installation 2 7 This page intentionally left blank 2 8 Installation Metallic Access Unit GTD 5 Administrative Reports Contents Description Procedures MAU Access Procedure To Read or Clear Counters To Read All Counters To Clear All Counters To Clear An Individual Counter To Read or Clear Timers To Read All Timers To Clear All Timers To Clear An Individual Timer To Perform All Diagnostics To Perform An Individual Diagnostic Test To Display Version Information To Disconnect Metallic Access Unit GTD 5 3 2 3 2 3 2 3 3 3 4 3 5 3 5 3 6 3 7 3 7 3 9 3 9 Administrative Reports 3 1 Description Various MAU administrative reports may be obtained by dialing the individual MAUs with a data terminal or personal computer using a 300 or 1200 baud modem Obtaining these reports will not restrict access to the RT System by the technicians These reports provide individual job access and function counter and timer information and may be reset after each reading Additionally the MAU can be instructed to perform self diagnosis and report the results to the data terminal Procedures MAU Access Procedure 1 Utilize a da
15. ntial damage or for loss damage or expense directly or indirectly arising from the use of the products or any liability using materials or from any other cause Harris electronic products are not field serviceable and customers are encouraged to return them directly to Harris Customer Service for all repairs Certain selected products because of their applications can be supported for non warranty maintenance by our customers Some documentation and replacement components are available for purchase from Harris Please contact Harris Customer Service for ordering information and availability Harris Corporation 809 Calle Plano Camarillo CA 93012 Telephone 805 987 9511 Metallic Access Unit GTD 5 Return of Equipment Products returned for in warranty and out of warranty repair must be shipped prepaid to Harris Products returned for warranty repair are subject to handling charges if no defects are found during our inspection All products returned to Harris should be packaged to prevent damage during shipment Harris will return repaired units by prepaid freight Equipment returned for out of warranty repair which is found to be damaged beyond repair will either be returned to the user as is or scrapped by Harris at the user s option Equipment returned for repair whether in or out of warranty which has failed due to misuse or negligence or has components removed will be repaired in accordance with our standard out
16. of warranty charge To return the MAU to Harris first obtain a Return Authorization RA Number from our Customer Service This RA number must be clearly marked on the shipping label or the container will not be accepted by Harris See the sample label below To Harris Corporation 809 Calle Plano Camarillo California USA 93012 8516 Attention Customer Support RA XXXXXX Metallic Access Unit GTD 5 Warranty 5 3 This page intentionally left blank 5 4 Warranty Metallic Access Unit GTD 5 Communications Product Division 809 Calle Plano Camarillo CA 93012 8519 USA IS www harris com 1 800 437 2266 1991 Harris Corporation Written Printed in USA 01I 724840 005 Issue 2 May 2000 next level solutions
17. pair Policy Contents Warranty 5 2 Non Warranty 5 2 Return of Equipment 5 3 Metallic Access Unit GTD 5 Warranty and Repair Policy 5 1 5 2 Warranty Non Warranty Warranty Harris Corporation guarantees equipment of its manufacture and each part or component thereof against all defects in material and or workmanship and agree to remedy any such defect at no charge provided that the defective unit is returned transportation prepaid to the factory or to an authorized repair center The warranty for this electronic product extends for a period of one year from the date of installation or initial use provided that this period shall not exceed 18 months from the date of manufacture Some specific products have different periods of warranty consult the Harris quotation or order acknowledgment for specific details Any product which has been repaired or replaced shall be similarly warranted as to such repair or replacement for the remaining warranty period of the product as originally installed or 90 days from date of repair or replacement whichsoever expires last This warranty does not extend to products which have been subjected to neglect accident or improper use nor to units which have been altered by other than authorized personnel No warranties other than those set forth in this section article are given or implied with respect to the equipment furnished hereunder and Harris shall in no event be liable for conseque
18. ta terminal or personal computer along with a communications program to dial the telephone number assigned to the MAU Configure the communications program for 8 data bits no parity and 1 stop bit 2 Modem answer and handshake tones will be heard 3 The following message will be displayed if the 1200 baud rate was previously selected CONNECT 1200 or if 300 baud was selected CONNECT 300 4 Enter the factory provided permanent password of 4372266 5 The Log In screen and Main Menu will be displayed Metallic Access Unit Model 24845 001 Copyright c Harris Corporation 1989 1991 All Rights Reserved Main Menu a Read or Clear Counters b Read or Clear Timers c Display Version Information d Perform Diagnostic Functions e Disconnect Enter command or lt cr gt for menu 3 2 Administrative Reports Metallic Access Unit GTD 5 To Read or Clear Counters 1 From the Main Menu press A 2 The Counter Menu will be displayed Counter Menu a Read All Counters b Clear All Counters c Clear Open Line Counter d Clear Short Line Counter e Clear Short to Ground Counter f Clear Tip Ground Counter g Clear Ring Ground Counter h Clear Tip Tone Counter i Clear Ring Tone Counter j Clear Tip and Ring Tone Counter k Clear Low Level Tone Counter l Clear Audio Monitor Counter m Clear Hold Test Counter n Clear MAU Access Counter o Return to Main Menu p Disconnect Enter command or cr for menu To Rea
19. unting Brackets to Cabinet Rack One MAU Service Manual Metallic Access Unit GTD 5 MAU Installation Kit The MAU installation kit includes the following items a One Cable Assembly with Connector twelve 24 AWG solid and three 22 AWG solid 12 feet long connected to fifteen wire Male Connector or equivalent cable assembly m Fifteen 19 24 AWG Pressure Crimping Connectors m Three 3B2E Green Protectors m Installation instructions One MAU Bypass Connector Hand Tools Required The following hand tools will be needed to complete the installation of MAU wm One Standard Installation Tool Kit m One Handset to make test calls One Multimeter to measure voltages and continuity Installation The following information is intended to be general in nature and to provide general MAU mechanical and electrical installation instructions Mechanical Installation Use the following procedure for installation 1 There are no MAU options to be set by the technician 2 The front or fuse side of the MAU should be mounted towards the front of the cabinet Note Mount the first short 3 Attach mounting brackets to opposite sides of MAU and secure with two bracket with it s shorter arm on screws on each side the side of MAU opposite the connectors 4 Plug the connector into the receptacle on the MAU and secure in place with the two connector screws Metallic Access Unit GTD 5 Installation 2 3 Note Mount
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