C-DOT DSS MAX - C
Contents
1. NOTE LC CAN BE BRL OR PRL FIG 3 1 ISTU CARD EQUIPAGE DESIGN ISTU AP IST FM 14 C DOT DSS MAX HARDWARE REQUIREMENTS The valid slots are from 5 to 12 and 19 to 26 Each PRI card occupies two consecutive slots PRL card can also be equipped as PRI 16 for supporting 15B D interface In PRI 16 interface all the 16 cards can be equipped the valid slots are 3 to 12 and 19 to 26 Any combination of PRI 30B D z PRI 15B D is feasible 3 Cables No extra cables are required for ISTU to TSU connectivity Existing flat cables used for ATU DTU TSU connectivity can be used 4 Filter Boxes Filter boxes 4 Amp 2 mH 4 Nos Slot No Card 1 PSU II Copy 0 2 3 PSU II copy 1 4 5 Line Card 6 Line Card re Line Card 8 Line Card B Line Card 10 Line Card 11 Line Card 12 Line Card 13 ITC ISDN Terminal Controller Copy 0 14 ICC ISDN Concentration Controller Copy 0 15 16 17 ICC ISDN Concentration Controller Copy 1 18 ITC ISDN Terminal Controller Copy 1 ISDN USER MANUAL 15 Chapter 3 Slot No Card 19 Line Card 20 Line Card 21 Line Card 22 Line Card 23 Line Card 24 Line Card 25 Line Card 26 Line Card Note Line Card Can be BRL or PRL Jumper Settings on ISTU Mother Board At present ISTU can be equipped only as a Principal TU at positions TU11 TU21 and TU31 It cannot be equipped at 4th fram2. Chapter 2 ISTU Architecture INTEGRATED SERVICES DIGITAL NETWORK ISDN The ISDN traffic is of two distinct types 1 Circuit switched voice amp data ii Packet switched data In case of Circuit switched voice amp data the traffic is routed through ISDN PSTN network In case of packet switched data the packet traffic is routed circuit switched to PSPDN where packet processing takes place This is a economical solution and meant for quick implementation and deployment of ISDN Service C DOT has implemented ETSI PHI 300 099 interface to PSPDN Network I NET which is being expanded as overlay network across the country to offer wide range of data communication services including 64 128 kbps frame relay service Both the cases of routing the packet data traffic on Bd and Bb channels are supported in C DOT DSS Architecture of ISDN Terminal Unit Figure 2 1 In C DOT DSS architecture the ISDN interfaces are terminated on a new add on terminal unit as ISTU A max of 256 bearer channels are provided by integrating one ISTU which can be configured to support any combination of BRI or PRI interfaces If the requirement of PRI BRI interfaces are more than 256 bearer channels one or more ISTUs can be integrated in C DOT DSS with the option of equipping them in the same BM or distributed across different BMs in the exchange The architecture also supports different level of concentration ensuring the connectivity of every sub
3. C DOT DSS The TLC is created by using CRP command CRE TST CKT with parameters as TLC TEN TST TEN The basic requirements are 1 The TLC TEN should be the first free circuit i e not associated with DIRNO of any BRL card 2 The status of the BRL card should be INS NRM This can be ensured by executing the command TST TRML CARD The TST TEN should be any free circuit ie not associated with DIRNO of the same BRL card or any other BRL card in the ISTU After executing the command the TLC is created and subjected to functional tests by using the TST TEN as reference circuit Once the functional tests are executed and passed the status of the circuit is marked as INS FREE which be verified using command DISPL TRM STATUS Procedure to Delete a TLC The TLC can be deleted using CRP command DEL TST CKT with parameters as TLC TEN Note Before deleting the test circuit BRL card should be made OOS OPR using CRP command FRC TRM CARD OOS How to Observe the Status of ISDN Interface DISPL TRM STATUS to monitor the status of interface STAT TRM TML TYP TEN DIRNO On execution of the above command the current status of the U interface is displayed which may be as C DOT DSS MAX TESTING OF ISDN FEATURES 0OS SO Fault may be in LT DLL or NT fault is out side OOS SE Out of service due to exchange side fault INS FREE or The interface is activated upto NT and fre
4. ISTU The active standby status of control units is communicated to terminal cards through the status information The control units themselves update the dynamic events at OS application level so that switchovers are handled properly C DOT DSS MAX Chapter 3 Hardware Requirements This section deals with the hardware requirements for installation of an ISTU in terms of motherboard cards and cables Before equipping it is ensured that the following items are available at the site 1 Motherboard ISTU with card frame 1 No 2 Cards PSU A05 2 Nos ITC 2 Nos ICC 2 Nos ISDN line cards As per requirement Details given below ISDN Line Cards There are two types of terminal cards which can be equipped in an ISTU in any combination based on the requirement a BRI Basic Rate Interface The valid slots for BRI cards are from 5 to 12 and 19 to 26 i e total 16 BRI cards can be equipped in an ISTU Each BRL card has got 16 Bearer channels B Channels supporting 8 subscribers each with 2B D channels b PRI Primary Rate Interface A maximum of 8 PRL cards can be equipped in an ISTU Each PRI supports 30 B D channels ISDN USER MANUAL 13 Chapter 3 1234 5 6 9 1011 12 13 14 15 16 17 18 19 2021 22 23 24 25 26 P P 11 5 5 LiL E E TI GITE LoL E U U o o 111
5. SUBSCRIBER NUMBER On successful execution of the command type of DIRNO is changed from NRML to PMSN Note MSN service is activated only when the ISDN equipments being installed in the subscriber premises is also programmed properly For programming of PHILIPS ISDN phone and TA the user manual may be referred However the flexibility of receiving the call in broadcast mode if desired may or may not exist in all the equipments 5 4 4 3 Addition Creation of more Directory Numbers on an ISDN Interface ADD MSN DN This command will be used for adding MSN subscriber after MSN facility has been granted through GRNT MSN command ADD MSN DN ADDITION CREATION OF MORE DIRECOTORY NUMBERS PMSN ISDN DIRNO WITH MSN FACILITY MSN DN ANY FREE DIRNO MAPD NO Same as MSN DN SUB PRI 1 CAL MOD NO INT OPR ACC YES SUB CTG 1 ORG REG NO ORG TRM REG NO TRM MTR CLS NRM MTR DET BLG ORD BLG ACC BAR INCMNG NOT BAR OG UPTO LCL ALL BS B SELECT SEQ BS BS12 CHNL BS 1 ALL_BS CALL BS 1 ALL_BS ISDN USER MANUAL 37 Chapter 5 5 4 4 4 Testing procedure for MSN facility Details of Test Description Expected Response Register the facility MSN with A as TRM REG and programme 5 additional MSNs as A1 to A5 for A using ADD MSN DN commands Programme the user equipment accordingly Verify originating and terminating calls for A amp A1 to A5 Note down meter readings of A amp A1 to A5 Make calls from each of th
6. along with associated circuitry like transformer protection device etc sends and receives 2 B D channels on user NT interface The U line interface also meets ANSI recommendation for return loss and longitudinal balance the timeslot of each subscriber for send and receive of 2 B D channel information towards the ITC The 2 B channels and D channel of each subscriber is separated by the UID The B channels of 8 subscribers are multiplexed over 2 048 Mbps B channel bus towards ITC The separated D channel information is sent to ISDN D Channel Exchange Controller IDEC Monitoring of the U line status and programming of the UID is done by the onboard micro processor C DOT DSS MAX ISTU ARCHITECTURE 2Mbps PCM LINKS FOR 32 B Ch 2B D U INT x D Ch 2B D D Ch P S 1 Mbps SERIAL LINK Y i LCP LCP LINE CARD PROCESSOR P S PACKETS AND SIGNALLING LAPD LINK ACCESS PROTOCOL ON D CHANNEL 2 2 BRI LINE CARD DESIGN ISTU AP IST BLC ISDN USER MANUAL 9 Chapter 2 2 1 2 2 2 1 2 3 2 1 2 4 2 1 2 5 10 IDEC Section The ISDN D channel Exchange Controller IDEC transmits and receives the D channel data of each subscriber handles the basic HDLC functions and supports a standard processor interface Each IDEC supports four D channels hence 2 IDECs are used on each BRL card The Sig
7. call on any other free B channel All other parameters may have default values or modified values as explained previously as part of CRE SUB command Note In case of the member directory nos the characteristics of individual subscriber is valid for originating calls and also for the terminating calls when dialled through its own directory number When dialled through PDN the characteristic of the hunt group are valid for the terminating calls Creation of DDI Group for ISPBX This is valid for ISDN interfaces and same command CRE HGP is used for this purpose as explained earlier for creation of Hunt Group Only the parameters having specific values for DDI are explained For definition and its possible values of remaining parameters the explanation given in part of CRE HGP may be referred i Principle Directory Number of the DDI Group PDDI Any DDI group is recognised by its principle directory number PDDI for i The characteristics of the DDI users for originating as well as terminating calls 11 Cumulative metering against PDDI for all the DDI users Any free directory number can be defined as PDDI 25 Chapter 4 26 11 Number of Digits NUM DGTS This parameter defines the number of DDI digits to be sent towards ISPBX to terminate the call on the DDI user which is also extension of ISPBX 111 Directory Number DIRNO The directory number of the DDI users are allocated from the free list
8. calls Registration Activation Deactivation The facility is automatically assigned to the ISDN number when it is created as Hunt Group with free ISDN interfaces without directory number and or ISDN subscribers as its group members For all the incoming calls the common service profile of the group is effective when dialed through group number The same is valid for outgoing calls if originated from the ISDN interface without DIRNO In case of individual subscriber which is also the part of Hunt Group its own characteristics remain effective when making outgoing calls Commands CRE HGP SETUP A B C D E amp F as ISDN subscriber CCS7 MOD R2 and Decadic signalling loopbacks 55 VIDEO CONFERENCING AND FILE TRANSFER USING VCON SOFTWARE Video conferencing through ISDN line can be done using VCON software and VCON hardware kit provided by VCON International Minimum requirements for this package are 1 2 40 Pentium PC with 200 MHz processor Windows 95 or 98 Loaded on the PC C DOT DSS MAX 3 32 TESTING OF ISDN FEATURES MB RAM 4 PCI Bus interface 5 5 1 VCON Kit Comprises of following items i Cruiser 75 150 PCI card on which one ISDN line can be terminated OR Cruiser 384 PCI card on which 3 lines can be terminated ii Analog desktop camera ii Telephone hand set iv ISDN interface cables v Meeting Point setup CD ROM Note For local testing two VCON hits and two PCs will be requir
9. from A to the network ii Release the call after successful conversation and verify the total charge units being displayed on the LCD display iv Now subscribe AOC D on A and repeat ii and iii The charge units are periodically updated on the LCD display with periodicity defined and controlled by a system parameter AOC D timer Terminal Portability TP This feature is used by the subscriber to suspend the call and resume it later on i Subscribe the facility TP on A ISDN USER MANUAL 35 Chapter 5 5 4 4 5 4 4 1 5 4 4 2 36 ii Make a call to B iii Press SUSPEND on the ISDN terminal equipment iv The call is suspended Now remove S BUS and reconnect Press Resume and A is again connected to B Multiple Subscriber Number MSN This service provides the facility of assigning multiple ISDN numbers to more than one user on a single interface This service allows direct dialling to one of the terminals connected to an access and enables the network to determine ISDN number which is applicable for originating calls for subscriber characteristics and charging services The addressing of terminals is achieved by applying a set of ISDN numbers which need not be consecutive When a call with one of these ISDN numbers is delivered the corresponding MSN number is indicated to the MSN user Grant Multiple Subscriber Number GRNT MSN MSN is one of the most important facility extended to ISDN subscriber
10. of directory numbers It is preferred that such directory nos should be derived in a block e g if 10 000 directory numbers are created on exchange code 548 and they are 548XXXX the DDI users for one ISPBX may be reserved as 5481XXX to 5481YYY for XXX to YYY as DDI users For example 160 DDI users may be created as 5481520 to 5481680 However any block of free directory numbers 548XXXX can be DDI users and depending on the value of the parameter NUM DGTS the last digits are sent to the ISPBX C DOT DSS MAX 5 1 5 2 5 2 1 Chapter 5 Testing of ISDN Features TESTING OF ISDN SERVICES This chapter has been organised in three different sections to ensure complete testing of ISDN services within the exchange as well as across the network The testing of ISDN services require the following add on equipments 1 2 nos of Network Terminator NT 2 2 nos of Terminal Adapter TA 3 2 nos of IBM compatible PC with add on data cards 4 Connecting U and S bus cables Note Connection between ISDN sub line and NT Network Termination is called U interface Connection between NT and the customer premises equipment CPE is called S interface A reference test set up for acceptance testing of ISDN services is shown in figure 5 1 Create the Directory Numbers with service profile as DIGITAL subscribers as explained in the document Exchange Operations and chapter 4 of this document Now the tests on the interfa
11. possible to configure PRI interface as PRI 16 i e 16B D interface so that each terminal group TG consists of one PRL card and one BRL card The basic design of PRL Card and also the implementation of ISDN services in C DOT DSS supports HO and H1 channels in future without adding any additional hardware This will be achieved by concatenating of 64 Kbps B Channels and they need not be contiguous but should be progressive H channels are used for higher bandwidth requirement e g LAN high speed data communication and Video transmission PRI Interface Block The PRI interface forms the most important block of the card doing almost all the main functions of the card The functions performed by this block are as follows Electrical coupling and line impedance matching line access protection for the subscriber line Data and clock recovery from HDB3 coded signals Compliance with input jitter requirements of CCITT I 431 Remote and local loopback Loss of signal indication Transmission of idle channel code HDB3 to NRZ data decoding and encoding Frame alignment multiframe alignment and synthesis CRC Frame alignment and multiframe alignment error logging CRC4 checking and generation Alarm extraction insertion Clock wander and jitter compensation Detection of unframed all ones 5 9 9 e Transmission of unframed all ones ISDN USER MANUAL 11 Chapter 2 2 1 3 2 12 This block i
12. the PSTN feature available for analog subscribers are also available to ISDN subscribers except multi party services For details of supplementary services refer Annexure II of this document The ISDN specific supplementary services are tested as per the procedure explained subsequently in this section Even though the supplementary services DDI and SUB addressing are supported in C DOT DSS and validated by TEC for its functioning it is not feasible to test at site due to unavailability of suitable test equipments The supplementary services as CD UUS CUG CONF and 3 PTY are not supported in C DOT DSS at present Connected Line Identification Presentation COLP and Connected Line Presentation Restriction COLR This facility is used by the subscriber to know that who is the ultimate destination being connected against his dialled number This is important in case of diversion when the call is being diverted to some other number i A has subscribed COLP ii B has subscribed to diversion and diversion is activated with destination directory number C iii A calls to B but the call land on C iv Now C answers the call and A gets the information on the LCD display that the connected number in C and not the dialled number B Advice of Charge AOC This facility is used to know the charge for the call as it is the case of 16 KHz metering pulse in case of Analog line i Subscribe the facility AOC E on A ii Make a call
13. which is very useful in Group or Business Environment The resources of single ISDN interface i e 2B channels can be shared by more than one user with the advantage of its own directory number and service profile For example a subscriber 5481500 is created as ISDN subscriber It is possible to add 6 other directory numbers 5481501 5481555 etc with the advantages as listed below Each subscriber has its own directory number Each subscriber has its own service profile e g different access level for O G calls a set of facilities etc Each subscriber can have specific bearer service Individual detail bill records for long distance calls as well as separate meter readings for each subscriber are available To programme the MSN in C DOT DSS an ISDN subscriber is created with MSN facility If already created the MSN facility can be assigned using command MOD SUB FAC The facility should be granted using CRP command GRNT MSN The parameter MAPD NO can be any coded sequence of digits with the option of retaining subscribers own directory number as mapped number Now one or more MSN subscribers can be added using command ADD MSN DN The command provides the flexibility to define the service profile of the MSN subscribers with unique mapped number To grant MSN facility to a normal ISDN subscriber input parameters for the command GRNT MSN are C DOT DSS MAX TESTING OF ISDN FEATURES GRNT MSN DIRNO MAPD NO GRANT MULTIPLE
14. 0 Chapter 4 Equipage of ISTU PROCEDURE OF EQUIPAGE If an ISTU frame is being added connect flat cables from ISTU to TSU If it is already fitted in a BM then this is not required Switch on the power supply cards after jacking them in Ensure power supply cards are working ok Jack in ITC and ICC cards both copy0 and copy1 To equip ISTU in an MBM Exchange in a principal TU position the following procedure is followed In a working switch if all PTU Principal TU positions are already equipped unequip a non ISTU type TU ATU DTU from the BM Follow the standard procedure for deleting routes subs TGP cards etc and unequip the frame Use the command UNEQ FRAME with following parameters MOD NO BM Number RACK NO 1 FRAME NO 1 2 3 With this the status of the frame becomes unequipped In case of a new BM having ISTU frame a PTU position in the above step may be skipped Insert ISTU frame in place of the ATU DTU removed Complete all physical connections of ISTU Replace 3mH 2A filter boxes on the busbar with 4A 2mH and connect the power supply In case of new BM with ISTU frame this replacement is not required EQUIP the ISTU frame using the following command C DOT DSS MAX 4 2 4 2 1 EQUIPAGE OF ISTU EQUIP FRAME with the following parameters MOD NO BM Number RACK NO 1 FRAME NO 1 2 3 TIC ID TIC ID of the frame to be equipped e g Ti01 or Ti05 or Ti09 FRAME TYPE B ITU Execu
15. 22 Bit 12231 Subscriber has UM activate the facility CALL COMPLETION SUPPLEMENTARY SERVICES Sl Facility Registration Registration Activation Deactivation Remarks as ORG FAC as TRM FAC No 18 Call Waiting CLD CALL 18 195 See Note 2 WTNG Call Hold CH WR or HOLD Only for ISDN CH WOR Terminal TERMPORT SUSPEND Only for ISDN Portability RESUME Hot Line TMD HT LN 20B s 12154 GRNT HTLN to activate Timed the facility first time or when deactivated by the subscriber ISDN USER MANUAL 47 Annexure II as ORG FAC as TRM FAC No LN Un timed Note 2 Invocation procedure for ISDN and PSTN subscribers are different A ISDN subscriber uses functional keys to put the existing call to wait to receive another call in waiting The PSTN subscriber has to invoke the feature by HSF and can toggle between two subscribers repeatedly by using HSF Also for ISDN subscriber CH should also be subscribed on the interface Facility Registration Registration Activation Usage Procedure Remarks as ORG FAC as TRM FAC No 23 HSF 250 B to add B HSF 253 to toggle Only for PSTN HSF 254 B to drop B HSF 254 to drop last party HSF 252 to activate to activate the conference should be followed before attempting to add a new party C using procedure HSF 251 24 As above with difference that dial 251 in place of 250 to add a party B as conference member Subsequently before
16. 431 standard The ISDN terminal cards are Basic Rate Line BRL and Primary Rate Line PRL cards Basic Rate Line BRL Card Figure 2 2 The Basic Rate Line card BRL is an interface to the switching system supporting 8 U interfaces towards the user It interfaces with the ISDN Terminal Controller ITC Switching Network for signalling and switching of voice and packet information The functions of the BRL card include HYBRID for 2 to 4 conversion and echo cancellation monitoring of line status its activation and deactivation over voltage protection to protect the exchange and the BRL card from high voltages test access for testing the line side and exchange side of the U interface power feeding emergency or sealing current feeding and 2B1Q coding for U interface The B and D channels are separated and 2 B channels of each interface total 16 B channels of each BRL Card are multiplexed on 2 048 Mbps link similar to TG of ATU DTU The D channel signalling and packet information is sent on shared signalling link 1 024 Mbps HDLC to the ITC The BRL card can be equipped in any one of the 16 slots assigned for ISDN termination cards in the ISTU U interface Transceiver Sections The U interface is terminated on this block A test access relay is used to isolate line side and exchange side of the U interface for testing purpose Emergency power or sealing current is fed to the NTs over U interface The U Interface Device UID
17. A 27 5 2 ISDN U Interface Testigos edita 21 5 3 ISDN Bearer Services uio citaba d 32 5 4 ISDN Supplementary Services edi trek ada 35 5 5 Video conferencing and file transfer using vcon software 40 Details of test sets tor ISDN terminals rrr i er reet a e taa cies 44 Operation Procedures for Supplementary Services in 46 H HOME MAX WORD APISDNAR doc September 26 2001 Chapter 1 Introduction This document describes about architecture and implementation of the Integrated Services Digital Network capability in C DOT DSS MAX This capability in existing exchanges can be implemented by replacing any one Terminal Unit by Integrated Services Terminal Unit ISTU At present this unit can be equipped only at the Principal Terminal Unit position of TI 01 05 or 09 It cannot have any concentration The ISTU just like any other TU communicates via the ICC ISDN concentration Controller card with the Time Switch Controller TSC This approach makes it easier to the provisioning of ISTU without disturbing exchange operations Chapter 2 explains briefly the architecture of ISDN Terminal Unit and various cards being used in C DOT DSS Chapter 3 describes the hardware requirements and interconnections and chapter 4 describes the procedures for equipping of ISTU and the necessary data creation Testing of various ISDN features is explained in Chapter 5 ISDN USER MANUAL 5 2 1
18. C DOTDSSMAX ISDN USER MANUAL Section 400 027 0777 System Wa Draft 01 3 August 2000 it Practices C DOTDSSMAX ISDN USER MANUAL O 2000 C DOT Printed in India C DOT D5S MAX ISDN USER MANUAL DRAFT 01 AUGUST 2000 BHADRA 2057 SERIES 000 OVERVIEW CSP SECTION NO 400 027 0777 THIS C DOT SYSTEM PRACTICE REFERS TO THE C DOT DIGITAL SWITCHING SYSTEM MAIN AUTOMATIC EXCHANGE ABBREMATED AS C DOT DSS MAX IN THE REST OF THIS PUBLICATION THE INFORMATION IN THIS SYSTEM PRACTICE IS FOR INFORMATION PURPOSES AND IS SUBJ ECT TO CHANGE WITHOUT NOTICE A COMMENT FORM HAS BEEN INCLUDED AT THE END OF THIS PUBLICATION FOR READERS COMMENTS IF THE FORM HAS BEEN USED COMMENTS MAY BE ADDRESSED TO THE DIRECTOR SYSTEMS CENTRE FOR DEVELOPMENT OF TELEMATICS 39 MAIN PUSA ROAD NEW DELHI 110 005 2000 BY C DOT NEWDELH Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Annexure Annexure IT Table of Contents Tr trod HCEIUB ee niti b eun t baee PH ERE EE 5 ISTU Architecture S 6 2 1 Integrated services digital network 6 Hardware Requirements add 13 Equapase OF IST U ii 20 4 1 Procedure of equipage rica dd id uen Pu ta uo Eae RT bac 20 4 2 Data Creation for an ISDN Subscriber nete eie pente 21 Testing of ISDN Features ninia did 27 bulk Testing of ISDN Services io
19. Cs working in hot standby mode If one of them develops a fault it is indicated to the BRL card by the change of the status signal and the BRL selects the other copy through its 2 to 1 selection logic The U Interface card is protected against surges and lightning by providing transit protection on each U line interface Additionally clamping diodes are used to protect the UIDs against surges Primary Rate Interface Line Card PRL The PRL Card is an interface to terminate a 2 048 Mbps link using symmetric twisted pair cable with characteristic impedance of 120 Ohms It conforms to ITU T recommendations 1 431 1 604 G 703 G 704 and G 706 for functional requirements The interface can be configured for applications as 30B D ISDN PRI Interface towards ISDN PBX as well as ETSI PHI Interface towards PSPDN C DOT DSS MAX ISTU ARCHITECTURE Each PRL card forms a terminal group TG and a maximum of 8 PRL cards 2 1 3 1 can be accommodated in each ISTU The PRL Card interfaces to ITC to route signalling and voice information The B channels of PRI interface are mapped on 2 048 Mbps link towards ITC However the procedure to handle signalling information is different for each type of interface In case of PRI 30B D interface the D channel signalling information is extracted from 16th time slot and converted to HDLC format before sending it to ITC card on 1 024 Mbps signalling link shared by all the termination cards of the ISTU It is
20. Only for PSTN adding a new member into the conference the procedure HSF 252 4 48 C DOT DSS MAX OPERATION PROCEDURES FOR SUPPLEMENTARY SERVICES IN C DOT DYNAMIC LOCKING FOR ACCESS LEVELS Facility Registratio Registratio Activation Usage Procedure Remarks n as ORG n as TRM FAC FAC Dynamic 23 ABCD ABCD to select the N 0 for all allowed STD Locking password N 1 for Local Access 23 ABCD PQRS to change the password N 3 for STD Access 24 ABCD N where N is the 4 for 10X Access current access N 5 for Regional i e 90 Access Note 3 The values for N are valid subject to the condition that the access level being selected is allowed by registration MISCELLANEOUS SUPPLEMENTARY SERVICES SI Facility Registration Registration Activation Remarks No as ORG FAC as TRM FAC Alarm ALRM AUTO 16 hh mm 17 hhmm Alternatively a subscriber Once can subscriber can register an alarm call with help of OPERATOR It possible by registering the facility ALRM SEMI and then granting it using command GRNT ALARM Queuing QUING NO Use HSF 7684 4 for DCTV suspending the Queue to make an originating call Or Only for PSTN See QUING DCTV Note 4 16 Khz for Only for PSTN The subscriber should Home created with MTR CLS Meters CHK MTR Note 4 The facility is valid for ISDN interface when configured as Hunt Group However for individual ISDN subsc
21. TST TRML CARD To test the card 12 DEL TST CKT To delete the test circuit if it is faulty 5 3 ISDN BEARER SERVICES 32 Using the setup as shown in figure 5 1 different calls are made to test ISDN to ISDN ISDN to PSTN and PSTN to ISDN interworking tests The details of the tests are given in the following table The successful tests will ensure the ISDN amp PSTN interworking across the network Packet Mode Bearer services need not be tested as they are not available in C DOT DSS at present but likely to be available in immediate future Tests for Teleservices Test Description Expected Result Response ISDN to ISDN Call i Basic ISDN to ISDN local Call The calls should be successful Gi ISDN to ISDN Call through DECADIC routes ISDN to ISDN Call through MOD R2 route iv ISDN to ISDN Call through CCS7 route Two Simultaneous ISDN Calls G The calls are originated from two ISDN subscribers A1 The calls should be successful amp A2 on the same ISDN line and terminated on the two ISDN subscribers B1 amp B2 on another ISDN line The calls are originated from two ISDN subscribers A1 amp Bl on the different ISDN lines and terminated on The calls should be successful the two ISDN subscribers A2 amp B2 on different ISDN lines ISDN Calls with in the Interface The two ISDN phones are connected on the same interface The call is offered to the second using multi drop connector The call is made from B
22. as and when desired A B Channel may or may not be reserved after the call is put on hold to allow the origination or possible termination of other calls The option of reserving or not reserving a B Channel when a call is held is based on the type of registration in the exchange Facility registration activation deactivation The facility call hold with reservation CH WR or call hold without reservation CH WOR is subscribed as REG TRM The existing call is put on hold by pressing Hold key on the ISDN CPE A new call may be received if in waiting or new call can be originated The call put on hold can be retrieved by using Hold key once again Setup Requirement Aand B as ISDN subscriber Cand D as PSTN subscriber CCS7 loopback route Note The facility is tested with both the option as B Channel reservation or without reservation Also the facility is tested by putting the originating as well as terminating call on hold Sub Addressing This feature is offered to the called user to expand its addressing capability beyond that provided by the ISDN number i e the Directory Number The sub address is used by the served user to identify a particular terminal on a multi drop access or a virtual terminal or process within the terminal At the time of offering the call to the user the sub address if received from the calling party is delivered to the user It is the functionality of the user CPE to interpret a
23. by ISDN phone on the same line dialling its own directory number and connection is established on answer Two Simultaneous ISDN Calls with same and different Bearer Services The calls are originated from two ISDN subscribers The calls should be successful Al SPEECH amp A2 3 1 KHz on the one ISDN line and terminated on the two ISDN subscribers BI SPEECH amp B2 3 1KHz on another ISDN line A1 amp B1 are PHILIPS ISDN Phones and A2 amp B2 are TAs Note SPEECH means normal voice call while 8 1 KHz Audio means a FAX call C DOT DSS MAX TESTING OF ISDN FEATURES Tests for G3 FAX Services Test Description Expected Result Response ISDN to ISDN using TA The test set up is made by connecting two TAs on lines A The call should be successful B The Analog Ports at TAs are configured as FAX ports between two FAX machines The call is made from FAX connected to A by dialling the and the FAX transmission is number B also through ISDN to Analog The test set up is made by connecting TA on ISDN line A The call should be successful and its Analog Port is configured as FAX port A FAX and the FAX transmission is machine is connected to TA of ISDN line A and another also through FAX machine is connected to Analog Line C The call is made from FAX connected to A by dialling the number C Analog to ISDN The test set up is made as explained in Step 2 The call is The cal
24. ce can be performed ISDN U INTERFACE TESTING The U Interface LT in C DOT DSS confirms to 2BIQ line coding and Embedded Operational Channel EOC functions are part of 2BIQ line coding The EOC functions are used to support the functional testing on LT in the exchange as well as NT in the customer premises up to S Interface The integrated tests are sufficient to test and isolate the faults in the interface Test Procedures for ISDN U Interface The CRP command TST TRM is used to perform the tests on the U interface in C DOT DSS On execution of CRP command the following parameter entry sheet is displayed on the screen ISDN USER MANUAL 27 Chapter 5 5 2 2 28 RTN COD G RPT FMT NO TML TYP LINE TST SET 60X TEN Circuit Number DIRNO Directory Number Only one of the two parameters as TEN or DIRNO should be specified at a time The command can be executed after defining the parameter values The successful execution of the tests confirm that the line is fault free The valid value for the test sets are 607 608 609 amp 610 The details of the test sets are listed in Annexure I Test set 607 covers Exchange side Tests on ISDN Line Test Sets 608 609 cover outside exchange functional tests for which TTC card is required Activation Deactivation from LT It is possible to activate to deactivate the interface from the exchange side FRC TRM OOS to deactivate the interface
25. d X SNOILOANNOO H3MOd NLSI Old 09 o HOaadg QNO gt 8 QV3H H3AO 1151 aNd AND SIG A8v 2 Bl ema S md PN zas C DOT DSS MAX 18 HARDWARE REQUIREMENTS TT04 TT02 TT03 TTO1 Al B B B B 26 14 13 2 1 TT06 TTO7 TT05 5 A A G B a BOB 26 17 14 2 1 ISTU Trie TT10 TT11 TT09 s A JA B B B B 26 14 13 E 1 TU3 TT16 TT14 TT15 TT13 m A o A 26 14 13 E 1 TU4 BPU A JA B BOB 26 2 1 TTO3 TTO1 TT04 TT02 7 TTO5 1706 6 s A E S JA TSU 2 B 2 B B 19 Q 26 17 10 2 1 TT11 9 2 TT10 TT15 TT13 TT16 TT14 NOTE 1 TU TSU INTERCONNECTIONS ARE SAME FOR DIFFERENT TU gt CONFIGURATIONS DESIGN ISTU AP IST ICTU ISDN USER MANUAL 19 4 1 2
26. e as TU41 in an SBM MBM configuration The reasons for this is the TTC card which is required to be equipped in 24 slot of TU41 for testing of ISDN subscriber lines There are two important id settings on ISTU backplane for ICC and ITC identification They are W1 to W7 for ITC card id settings W9 to W15 for ICC card id setting ISTU Position as ITC id Jumper Settings ICC id Jumper On back plane Settings on back plane TU11 TIO1 W5 W7 short W14 W15 short TU21 TIO5 W3 W5 W short W9 W14 W15 short TU31 1109 W4 W5 W7 short W10 W14 W15 short 16 C DOT DSS MAX 1 e 9 W2 ee W10 W3 ee wil WA W12 W5 ee W13 We W7 W15 ITC ICC ISTU Power Supply Connections Refer Fig 3 2 for Power Connection Details ISTU BM Interconnection HARDWARE REQUIREMENTS The connections of ISTU frame to the Time Switch Unit TSU frame are same as that of any analog TU cables from each copy of ICC will be connected to the TSI card of TSU on the backplane The connections are shown in Fig 3 3 Cables TSU to ISTU connections are given below Example is being taken as ISTU to be equipped in 224 frame of a BM CABLE ISTU Side TSU Side Slot Conn Tab Slot Conn Tab TT06 14 B 1 10 A 3 TTO7 17 B 1 10 A 4 TT08 14 B 2 17 A 3 TTO9 17 B 2 17 A 4 ISDN USER MANUAL 17 Chapter 3 49 LSNdV NLSINOISAC 9i1ns
27. e to INSF FREE provide service CP BUSY The interface is busy and providing service OOS SUS It is transient status and valid for internal use by the system itself The status of the terminal is made OOS SE or OOS SO after verification of fault condition It the fault is found to be transient in nature the status of line is marked as INS FREE and available to the subscribers to provide the service 5 2 6 Summary Sheet of the CRP Commands for O amp M of ISDN Interface in C DOT DSS 1 CRE TST CKT To create a test circuit to simulate the functions of LT and NT for functional testing of ISDN interface 2 DISPL TRM STATUS To display the status of the interface 3 FRC TRM OOS To deactivate the interface from the exchange 4 FRC TRM INS To activate the interface from the exchange without testing 5 PUT TRM INS To activate the interface from the exchange after successful testing of LT 6 TST TRM To test the interface as LT as well as NT up to S Interface at the customer premises 7 DISPL TRML CARD To display the status of the card STATUS 8 FRC TRML CARD OOS To make the card out of service for replacement or as a mandatory requirement to delete the test circuit 9 FRC TRML CARD INS To make the card in service forcibly i e with out performing the detail tests ISDN USER MANUAL 31 Chapter 5 10 PUT TRML CARD INS To make the card in service after performing the detail tests on the card as well as all the 8 LTs 11
28. ed 5 5 2 Hardware Installation 9 9 Insert PCI cruiser card in the free PCI slot at Motherboard of the PC Connect ISDN Line pair to NT and from NT to PCI card jack Connect the Main Analog camera in the designated jack of PCI card Connect the handset to PCI card for speech purpose Switch on the PC to boot it 5 5 3 Installation of Meeting Point Software Package Note down Licence Number of Meeting Point S W as written on the CD ROM provided Insert CD ROM in the CD Drive In D drive select Meeting Point Installation Utility From this window install MSDUN version 1 3 winsock 2 and Meeting Point 4 0 Once Meeting Point 4 0 is installed Welcome Window will open Click Next in this window In User Information window fill the name amp company say Nainital amp DOT respectively In serial No fill Licence No as already noted from CD ROM Click Next In Software Licence Agreement window click NEXT In Setup Type window select Typical and then click next In Start Copying Files window click next ISDN USER MANUAL 41 Chapter 5 5 5 4 42 9 9 o In Setup complete window select yes and click next In configuration wizard User Information window fil up all informations and click next In configuration wizard switch Type window select INDIA and Switch Type EURO ISDN NETS Then click next In configuration wizard phone Nu
29. em and verify the meter readings again Modify the access barring as STD for using command MOD SUB CHAR and also register the facility SUB OG BAR Modify the facility to grant diversion for A5 as DOB SEL NUM Activate the diversion from A5 and verify it by dialling from A to The call should mature on diverted number Modify the subscribed bearer services as BS3 for A5 Make a origination from A5 The calls should be successful indicating that MSNs Al to A5 are configured successfully on interface A The meter readings for A amp 1 to A5 should be incremented for each of them conforming to billing operations for MSN New access barring should be effective conforming to individual service profile of MSN Successful diversion conforms that each MSN can subscriber a set of services individually It should fail as A5 in PHILIPS phone and request SPEECH which is not subscribed by A5 and conforming that each MSN can subscribe BS independently The programming considerations in C DOT DSS is transparent to the type of CPE being used by the user However it is different in CPEs The functioning of MSN depends upon the programming considerations of the CPE to be derived from its user manual 38 C DOT DSS MAX 5 4 5 5 4 6 TESTING OF ISDN FEATURES Call Hold CH WR CH WOR The call hold service allows a user to place a existing call on hold and subsequently re establish communication
30. ember TENs TEN IC TEN BW The member TENs may be defined as incoming only or both way or any combination of them If one or more free TENs are defined as member TENs using parameter TEN IC these TENs are not used to terminate the call on the user In other words the exchange can not use these circuits to terminate the call Only the calls are originated on these circuits by the user For all the calls being received from the user the common characteristics of the hunt group is used to route the call C DOT DSS MAX 4 2 3 ISDN USER MANUAL vi EQUIPAGE OF ISTU Similarly one or more free TENs defined as member TENs using parameters TEN BW these TENs are used to receive or terminate the call as per the characteristic of the hunt group Line Type LIN TYP This parameter may have any one of the values as PBX or PBX REV for Analog lines and ISPBX PTP or ISPBX PTM for ISDN lines For ISDN interfaces the parameter has to be defined as ISPBX PTP or ISPBX PTM When the hunt group in terminated on the ISPBX the parameter should be defined keeping in view the configuration of the terminating interfaces on ISPBX When defined as PTP the call is offered on a B channel and the user CPE or ISPBX has to accept the call on the selected B channel If the call is not accepted on the specified B channel it fails with suitable cause value When defined as PTM the call is offered on a B channel with option to the user to accept the
31. from LT TML TYP TEN DIRNO The command can be executed after defining the parameter values The successful execution of the command confirms that the interface has been deactivate FRC TRM INS to activate the interface from LT without tests TML TYP TEN DIRNO The command can be executed after defining the parameter values The successful execution of the command will result in activation attempt being initiated from LT However in case of fault of LT or NT the interface will be deactivated with its status marked as OOS SO PUT TRM INS to activate the interface from LT after successful testing TML TYP TEN DIRNO C DOT DSS MAX 5 2 3 5 2 4 TESTING OF ISDN FEATURES The command can be executed after defining the parameter values subject to the condition that the TLC is already created The successful execution of the command confirms that there is no fault in LT The line status is marked as INS FREE In case of fault in DLL or NT the interface will be deactivated with its status marked as OOS SO Procedure for Testing of ISDN Termination Card In case more than 50 interfaces corresponding to a Interface Card is reported as faulty it is advised to perform the tests on the BRL card The card can be tested using CRP command TST TRML CARD with parameters as RTN COD G RPT FMT B REPEAT NO TML CRD TYP BRI TST SET 605 or 606 CARD SLOT The status of the BRL card can be displayed by using CRP c
32. given default value or a valid parameter to provide a certain facility to subscriber Creation of Hunt Group for PRI subscriber A hunt group is represented by one Principal Directory Number PDN All its members may be already created directory numbers as member directory numbers free TENs as member TENs or a combination of both Similarly a DDI group is represented by its PDDI Number and all its members as free directory numbers The TENs of DDI group are used as pool C DOT DSS MAX EQUIPAGE OF ISTU of resources to carry the traffic between Local Exchange and ISPBX for DDI Subscribers To create a Hunt Group for ISPBX issue the command CRE HGP and obtain the parameter entry form CRE HGP PDN PDDI NUM DGTS HNT TYP METER NO Q LGT MEM DIRN TEN BW TEN IC LIN TYP INS TYP SUB PRI CAL MOD SUB CTG ORG REG TRM REG MTR CLS DET BLG ACC BAR LIN CAT OPR ACC BS B SELECT ACS OPT CREATION OF HUNT GROUP lt gt Any Free DIRNO 1 SEQ MET 0 NONE 1 TEN of PRI SLOT NONE ISPBX PTP DIGITAL lt gt NO INT 1 NO ORG AS REQUIRED NO TRM AS REQUIRED NRM MTR ORD BLG INCMNG NOT BAR OG UPTO LCL ALL BS AS REQUIRED 1 YES BS123 SEQ TONE ANNC The parameters PDDI and NUM DGTS are used for DDI group ISDN USER MANUAL 28 Chapter 4 24 After obtaining the parameter entry form the different parameters can be defined as per their functi
33. ith C DOT DSS MAX TESTING OF ISDN FEATURES 5 5 5 Data Transfer Using VCON Software In user array select Transfer It will ask for the file name to be transferred Give the file name along with full directory path Click OK Data Transfer will start Speed of Data transfer time taken will be shown ISDN USER MANUAL 43 1 44 Annexure Details of test sets for ISDN terminals TEST SET NO 605 1 Essential and non essential power on tests on the BRI PRI terminal cards TEST SET NO 606 Terminal inside exchange tests for BRL PRI card Test Set No 606 Details im Deo O pr e peo pe B Channel loop back test at LT end D Channel loop back test at LT end Line activation deactivation test IDEC functionality test NT activation deactivation test using TLC CRC generation recognition test using TLC TLC indication bit test or UID event detection test TLC line loop back test Power On test on the terminal card TEST SET NO 607 inside exchange line side tests BRI only and inside exchange TLC functional tests Inside Exchange Line Side Tests 1 2 8 4 5 Constant current limiting circuit test 48 Volt links constant current limiting ckt test B channel loop back test at LT end D channel controller test D channel loop back test with LT C DOT DSS MAX II DETAILS OF TEST SETS FOR ISDN TERMINALS Inside Exchange TLC Functional Tests TLC LIN CKT activation and deactivation tes
34. l should be successful made from FAX connected to C by dialling the number of and the FAX transmission is ISDN line A also through Tests for Misc Services Test Description Expected Result Response ISDN Call to Level 1 Services Level 1 positions 198 as non metered services and 131 as metered services are already created in the Exchange A 18 made from ISDN Phone A to 198 A call is made from ISDN Phone A to 131 The call is put through successfully without incrementing meters The call is put through successfully incrementing the meter of A Tests for Bearer Services Test Description Expected Result Response File Transfer Using PC 64 Kbps UDI data call The test set up is made by connecting two TAs on ISDN The call is put through lines A B The TAs are configured as Synchronous DTEs successfully with bearer The PCs are connected at the asynchronous data ports The service as 64 Kbps UDI and call is made from A by dialling the number B from the the file is transferred from keypad terminal A to B ISDN USER MANUAL 33 Chapter 5 A1 Syne r n ASS Dota Tema i5 Hebron A2 EDH Mer T eil DEDO ia Header H home max word Nisdnbr02 jpg Fig 5 1 ISDN TEST SETUP 34 C DOT DSS MAX 5 4 5 4 1 5 4 2 5 4 3 TESTING OF ISDN FEATURES ISDN SUPPLEMENTARY SERVICES In C DOT DSS all
35. mber window fill up the Number of ISDN Lines 2 and fill up the Phone No of ISDN Line in front of 1 as well as 2 Then click next In configuration wizard H323 window fill all the informations as default and select Allow adaptive Bandwidth Adjustment and Automatic buffering control Then click next In configuration wizard Multi VGA Support window select Disable and click next In On line Directories window select file 755 VCON CO ie DVC server and click next In configuration wizard Dan Zoom Tilt camera window select camera Type as others and Com port as Coml Then click next In configuration wizard MSN window select No and click next In sub Addressing window click next In Confirmation window click finish This will install the Meeting Point Software completely Shut down and reboot the P C Dialling Procedure Click start in windows taskbar Go to programmes and select Meeting Point Switch on the Camera mounted on Top of your PC cabinet Local video image will appear on a window on the Monitor Screen Adjust the camera to get sharp and focussed images On user array select Dial and dial the telephone No of distant end ISDN line or 224 ISDN Line for testing purpose on which similar set up is available Now video images of called party will appear on the Monitor Thus video conference will began One can speak to other end using handset provided along w
36. nalling and D channel packet information between the ITC and the BRL card is exchanged over a 1 024 Mbps HDLC link shared by 16 ISDN termination cards using collision detection through priority mechanism to resolve collision B channel Interface to ITC SN The 32 B channels of 16 BRI subscribers terminated on 2 BRL cards are time multiplexed to 2 048 Mbps serial link TG For 16 termination cards 8 nos 2 048 Mbps serial links are used to carry B channels between termination cards and ITC card The ITC card generates one card select signal for each card which is also fed to all the UIDs and they use it to place the B channels data on 2 048 Mbps bus and extract the B channels data from the 2 048 Mbps bus as per the programmed time slots Between two BRL cards of a TG the first 16 timeslots are allotted to 155 BRL and last 16 time slots to 224 BRL card The 2 048 MHz clock from ITC is used as the B Clock by the UIDs Power Feeding Section Power is fed to the NTs by an ONBOARD Power Supply DC DC Converter The 48 V supply received from the back plane is converted to 96 3 and fed to the NTs The maximum current needed by a NT during emergency for the longest loop is 25mA The current fed sealing or emergency is limited by the current limiting circuit provided by the thermistors on the card Duplication amp Protection To ensure continuous operation of the system in the event of fault all the signals are fed to BRL card from 2 IT
37. nd act on the sub address information Registration Activation Deactivation The facility SUB should be registered as TRM REG i e terminating facility There is no procedure for activation or deactivation as the facility is activated by default on registration Setup Requirement ISDN subscribers A and B CCS7 loopback with route code 02 ISDN USER MANUAL 39 Chapter 5 5 4 7 Test Procedure As there is no terminal to allow interleaving of SUB address at the time of originating the call the facility is tested using protocol tester by originating a call from Protocol tester and monitoring the SUB Address information on the called user interface As per the definition of the service the network has to deliver the information without any processing or action which is the part of functional requirement of CPE The test procedure is sufficient to validate the SUB facility as far as Switching System is concerned Line Hunting for Hunt Group Line Hunting is a supplementary service that distributes all the incoming to a specific ISDN number over a group of ISDN interfaces When dialed through the Group ISDN number one of the free ISDN interface from group of interfaces is identified to put through the call However if the ISDN number of the individual interface in the group is directly dialed the call is terminated if the interface is free otherwise it fails In other words such calls are offered as normal terminating
38. ommand DISPL TRML CARD STATUS with parameter as TML CRD TYP BRI CARD SLT The status of the card can be displayed as INS NRM INS FRC or OOS SE INS NRM Card has been brought INSERVICE after performing the complete tests successfully INS FRC The card has been made INSERVICE forcibly without performing any tests OOS SE 1 The card is faulty The status of a BRL card can be modified to Out of Service by using CRP command FRC TRML CARD OOS Similarly its status can be modified to In service by using CRP command FRC TRML CARD INS without testing or PUT TRML CARD INS after successful testing Creating a Reference Test Circuits TLC in C DOT DSS The TLC is created to simulate the functions of LT when tests set 608 is executed to verify the functioning of NT up to S Interface Similarly it simulates the functions of NT to test the LT in the exchange This helps in integration of all the functional requirements of testing of ISDN Interface in C DOT DSS as the tests are simulated in conformance to actual functional ISDN USER MANUAL 29 Chapter 5 5 2 5 30 requirement This avoids the use of any additional test equipment to isolate and locate the fault Sufficient checks are also incorporated to verify the sanity of TLC time to time This possible by testing the TLC at the time of creation itself The TLC is functionally tested in totality before making it available for testing of other ISDN interfaces in
39. ons explained below 1 1 11 1v v Principal Directory Number PDN A free directory number is assigned to this parameter When dialled to PDN the call is terminated on any one of the free circuit Member TEN or Member Directory Number which is selected using progressive hunting procedure However when the call is made to member directory number it is directly terminated on the dialled number if it is free In case of dialled number is busy faulty or access barred the call fails Note Not required for PRI Hunt Group Hunting Type HNT TYP Only one type of hunting procedure as Progressive is implemented As such this parameter has default value and need not be modified Queuing Length Q LGT This parameter decides the maximum number of calls that can wait in queue if dialled through PDN and all the circuits are already busy The maximum value of this parameter is 200 Member Directory Numbers MEM DIRN One or more directory numbers can be member of the hunt group The directory numbers should have been created and its status should be OOS OPR before they become member of the hunt group Note All the member directory numbers of a hunt group should be either Analog Subscribers or ISDN Subscribers A mix of both the types in single hunt group is not allowed This is also true for member TENs defined as TEN BW or TEN IC All the members of a hunt group should be same type i e PSTN or ISDN M
40. or ISDN GRNT MSN to grant the facility and ADD MSN DN to add additional MSN Subscribers COLP NO NO Only for ISDN Can be used with C DOT TA210 as PHILIPS Phone does not support the feature The facility is available by default to all the subscribers and no registration is required 46 Note 1 The PSTN subscriber can invoke the service just by HSF A ISDN subscriber can invoke the service by 65 after switching over to C DOT DSS MAX OPERATION PROCEDURES FOR SUPPLEMENTARY SERVICES IN C DOT Keypad Dialling Mode from conversation stage Procedure to switch over to Keypad Dialling is specific to the user s equipment e g for PHILIPS Phone the keys lt Memory gt lt Display gt are to be pressed The complete procedure for invocation of MCID service from PHILIPS ISDN Phone is Memory Display 65 In the absence of any procedure from TEC for ISDN Subscribers the in built capability of PHILIPs telephone has been exploited to support the feature A 2 CALL OFFERING SUPPLEMENTARY SERVICE SI Facility Registration Registration Activation Deactivation Remarks as ORG FAC as ORG FAC Applicable to HGP and DDI groups created using command CRE HGP oed E ad FXD GNT ABS SRV CFU SEL oo 14 BH 15 Subscriber has UM activate the facility CFB GRP 66 67 GRNT DIV UM CFB SEL P SEL 220 42214 Subscriber has UM activate the facility UM CFNR SEL 2
41. riber more than one call can wait on an ISDN interface as specified allowed by the administrator for that interface ISDN USER MANUAL 49 System Practices COMMENTS C DOT The following comments pertain to Document Name CSP Section Issue Draft 11 15111111 1 Month Year COMMENTS Use a separate sheet if required Please mail your comments to Your Reference Centre for Development of Telematics Name Attn Mr Y K Pandey Dro Director Systems Company Address 39 Main Pusa Road New Delhi 110 005 Tel 91 11 5740374 Fax 91 11 5756378
42. s implemented using four major functional blocks namely transmitter line interface receiver line interface the transceiver and two frame deep elastic buffer Elastic buffer is able to provide automatic buffer recentering on occurrence of slip due to buffer full empty while controlling jitter and clock wander D Channel Protocol Handling The D channel data is available in the 16th timeslot This block extracts the information of 16th timeslot and performs basic HDLC functions using HDLC controllers The processed information is forwarded towards ITC Main functions of this block are Flag detection generation Zero delete insertion Check for abort Check for idle Maximum frame length checking CRC generation and support collision detection for the sharing of 1 024 Mbps signalling link ISTU Control Unit The control unit interfaces BRL and PRL cards on one end and TSU on the other end It has a 256 x 256 switch The 256 channels are switched on to a 128 channel 8Mbps link towards Time Switch Unit The D channel data traffic is switched towards ISTU where ETS1 PHI interface has been configured Signalling data received from BRL PRL cards is forwarded to BP after LAPD to C 85 conversion The traffic on BP from an ISDN subscriber can be potentially 8 times the traffic of a non ISDN subscriber To reduce the load on BP some of the functions like ISTP terminal process overload and concentration control are shifted to the control unit of
43. scriber for signalling and providing uniform allocation of time slots for switching of Bearer channels carrying data and voice The circuit switched traffic is separated at ISTU and routed towards CS Time Switch Unit of C DOT DSS Similarly packet switched traffic is routed towards PSPDN on ETSI PHI interface C DOT DSS MAX ISTU ARCHITECTURE 8 LINKS Let 7 EACH OF 32 B CHANNELS 2Nos 128 B Ch 8Mbps PCM LINKS AS AND LINK1 256x256 7 7 4 ICC 256 Kbps HDLC ITC1 ICC1 7 _ 1 Mbps SERIAL LINK LC14 T FOR D CHANNEL PS PACKET SWITCH CS CIRCUIT SWITCH PCM SIGNALLING 32 B Ch ONLY IN CASE OF CONCENTRATION FIG 2 1 ISTU ARCHITECTURE DESIGN ISTU AP IST ARCH ISDN USER MANUAL Chapter 2 2 1 2 1 As explained earlier the core switching element of C DOT DSS i e T or T S T functions as CS element for ISDN traffic Basic Rate Interface BRI is through a twisted pair of copper cable conforming to G 961 standard It provides support for continuous powering up of NT and in emergency condition to support one TE for POTS service with current limiting The Primary Rate Interface PRI is standard 2 048 Mbps link driven on symmetric twisted pairs with characteristic impedance of 120 ohms conforming to CCITT 1
44. t TLC CRC generation recognition test 1 2 3 TLC indication bits test 4 TLC line loop back test 5 PRI SYN FAIL Test 4 TEST SET NO 608 Terminal Outside Exchange Functional Tests 1 2 3 4 5 Line circuit activation and deactivation test B1 B2 channel loopback with NT 2B D channel loopback with NT S T interface activation and deactivation test Non destructive test consists of a Block error counter preset test b NT embedded operational channel capability test c NT UID CRC error recognition logic test d LT UID CRC error recognition logic test 5 TEST SET NO 609 Terminal Outside Exchange Electrical Tests 1 2 8 Interference foreign potential voltage test Insulation resistance Insulation capacitance 6 TEST SET NO 610 Inside and Outside Exchange Functional Tests Test 607 608 609 ISDN USER MANUAL 45 EET Il Operation Procedures for Supplementary Services in C DOT NUMBER IDENTIFICATION SUPPLEMENTARY SERVICES Pond Registration Registration Activation umm Remarks as ORG FAC as TRM FAC CLIR CLIR PR CLIP CLIP AM case of PSTN Subscriber the telephone instrument should support CLI display CLIP amp CLIRO MCID MCID See Note 1 is put under malicious observation using command MOD SUB OBS with OBS MALC 2 0 Only for ISDN Applicable to DDI groups created using command CRE HGP NO NO Only f
45. te The command will equip ISTU Check the status of ICC and TIC cards The status of these controller cards will be OOS OPR Do the diagnostics on ICC cards and bring them in service ACT SBY Then do the diagnostics on TIC cards and bring them in service ACT SBY Note For Diagnostics of TIC ICC must be inservice Now line cards BRL PRL cards can be equipped using the command EQUIP TRML CARD with the following parameters HW TYPE The values are BRI PRI PRI 16 Ver No 1 Card Slot BM No Rack No Frame No Slot No Now make the trml equipped inservice by the command PUT TRML CARD INS The card will be brought inservice after diagnosis You can also use the FRC TRML ARD INS command where by dgn of the card will not be done but will be directly brought in service DATA CREATION FOR AN ISDN SUBSCRIBER A typical example of creation of ISDN subscriber Give MMC command cre sub DIRNO a free dirno to be given TEN a free ten from the slot equipped as BRI ISDN USER MANUAL 21 Chapter 4 4 2 2 22 LIN TYPE INS TYP DIGITAL SUB PRI CALL MOD ORG REG TRM REG MTR CLS DET BLG ACC BARR LIN CAT SUB CTG CAB ID OPR ACC BS f BS123 B SELECT CHNL BS 2 All BS CALL BS 2 All BS ACS OPT f TONE ANNC EXECUTE BS12 For speech and audio BS3 For data BS123 For speech audio and data The parameter left blank may be
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