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BSS6011: ISDN Abis (ETSI)

dn9812761Issue 6-0 en

# Nokia CorporationNokia Proprietary and Confidential

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2003330

Nokia BSC S10.5 ED, Vers. 2, ProductDocumentation

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The information in this documentation is subject to change without notice and describes only theproduct defined in the introduction of this documentation. This documentation is intended for theuse of Nokia's customers only for the purposes of the agreement under which the documentationis submitted, and no part of it may be reproduced or transmitted in any form or means without theprior written permission of Nokia. The documentation has been prepared to be used byprofessional and properly trained personnel, and the customer assumes full responsibility whenusing it. Nokia welcomes customer comments as part of the process of continuous developmentand improvement of the documentation.

The information or statements given in this documentation concerning the suitability, capacity, or performance of the mentioned hardware or software products cannot be considered binding butshall be defined in the agreement made between Nokia and the customer. However, Nokia hasmade all reasonable efforts to ensure that the instructions contained in the documentation areadequate and free of material errors and omissions. Nokia will, if necessary, explain issueswhich may not be covered by the documentation.

Nokia's liability for any errors in the documentation is limited to the documentary correction of errors. NOKIA WILL NOT BE RESPONSIBLE IN ANY EVENT FOR ERRORS IN THISDOCUMENTATION OR FOR ANY DAMAGES, INCIDENTAL OR CONSEQUENTIAL(INCLUDING MONETARY LOSSES), that might arise from the use of this documentation or the

information in it.This documentation and the product it describes are considered protected by copyrightaccording to the applicable laws.

NOKIA logo is a registered trademark of Nokia Corporation.

Other product names mentioned in this documentation may be trademarks of their respectivecompanies, and they are mentioned for identification purposes only.

Copyright © Nokia Corporation 2003. All rights reserved.

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Contents

Contents 3

List of tables 4

List of figures 5

Summary of changes 7

1 Overview of BSS6011: ISDN Abis (ETSI) 9

2 Activating and testing BSS6011: ISDN Abis (ETSI) 112.1 Network elements involved 112.2 Hardware effects 11

2.3 Installation and activation 112.4 Testing of activation 192.4.1 Test environment 192.4.2 Prerequisites for testing 192.4.3 Test execution and expected results 19

3 Deactivating and testing BSS6011: ISDN Abis (ETSI) 213.1 Testing of deactivation 21



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Contents

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List of tables




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List of figures



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List of figures

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Summary of changes

Summary of changes

Changes between document issues are cumulative. Therefore, the latest document issue contains all changes made to previous issues.

Changes made between issues 6 and 5

The information in this document has been marked ETSI specific and theGlossary has been removed.

Chapter 2, section Installation and activation

Clarified the instructions for creating DSS1 interfaces.


Activating and testing BSS6011: ISDN Abis:

. Create circuit group and the circuits: ZRCC:NA0:NCGR=ISDNABIS,DIR=BI,CGR=100,CRCT=72-1&&-15&-17&&-31, LSI=DSS01,DCS=ISDN1; changed to ZRCC:NCGR=ISDNABIS,CGR=100,TYPE=DCS:LSI=DSS01;

. Add circuits to the circuit group: ZRCA:GSW:NCGR=ISDNABIS,CRCT=73-1&&-15&-17&&-31,DCS=ISDN2; changed to ZRCA: NCGR=ISDNABIS:CRCT=72-1&&-15&-17&&-31,DCS=ISDN1; TheET must be connected and the D-channel created before this command:ZRCA:NCGR=ISDNABIS:CRCT=73-1&&-15&-17&&-31,DCS=ISDN2;

. Change the state of the D-channel: ZDTC:ISDN1:P,WO; changed toZDTC:ISDN1:WO;

. Creation of a circuit group for the time slot 0-1: ZRCG:GSW:TYPE=S,CGR=99,NCGR=TONES,CRCT=0-1; changed to ZRCC: NCGR=TONES,CGR=99,TYPE=SPE: FORMAT=0,HUNTED=Y; Addcircuit to the circuit group: ZRCA:NCGR=TONES:CRCT=0 1;

.

Creation of ISDN Abis BTS: BAND=GSM changed to BAND=900. Creation of ISDN Abis TRX: ERC:BTS=7,TRX=1:TRA=ISDN,:53,0:

DNAME=T0701:SIGN=2,TLOC=0,OLOC=2, TEL=123456789,CH0=MBCCHC,CH1=NOTUSED; changed to ZERC:BTS=7,TRX=1:TRA=ISDN,:FREQ=53,TSC=0:DNAME=T0701:SIGN=2,TLOC=0,OLOC=2, TEL=123456789,CH0=MBCCHC,CH1=NOTUSED:;

. Testing of deactivation: DTI:T0701; changed to ZDTI:NAME=T0701 andZDTI:BCF07 changed to ZDTI:NAME=BCF07



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Summary of changes

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In addition, the document has been revised throughout to comply with the latest documentation standards.


Chapter Installation and testing, section Test environment

The BSC's software build has been changed from S8 to S8 or later.




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1 Overview of BSS6011: ISDN Abis (ETSI)The ISDN Abis feature utilises the existing ISDN network, which can be used toestablish an ISDN connection between the BTS and the BSC. The BTS uses a 2 B+ D interface to connect to the ISDN network, and the BSC uses a 30 B + Dinterface.

The ISDN connection is dialled up under the control of the BSC based on thestate of the TRX .

When the state of the TRX is UNLOCK, the connection between the BSC and theBTS always exists. When the state of the TRX is changed to LOCK, all channelsof the TRX are blocked (also possible BCCH channel) and the ISDN connectionis released.

GSM calls are established inside these established ISDN calls. The maximumnumber of GSM calls is seven full-rate or fourteen half-rate calls per TRX, if a 16kbit/s TRX link and 2 * 64 kbit/s ISDN connection are in use.

This feature is optional.

For more information on the feature, see ISDN Abis (ETSI) .

. Activating and testing BSS6011: ISDN Abis (ETSI)

. Deactivating and testing BSS6011: ISDN Abis (ETSI)



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Overview of BSS6011: ISDN Abis (ETSI)

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2 Activating and testing BSS6011: ISDNAbis (ETSI)

The BTS must be able to use the 2 B + D interface.

The OMC interface changes for this feature (only creating the ISDN Abis TRX

and statistical functions).

2.1 Network elements involved

The feature does not involve the MSC.

2.2 Hardware effects

Hardware changes are not needed for the ISDN Abis feature in the BSC.

The new interface card is needed in the BTS.

2.3 Installation and activation

This is an example of activating the feature in the Nokia Talk-family of basestations (which may also be referred to with the letter D). The extra parameters of the ISDN Abis feature are the same also in the Nokia PrimeSite BTS.

Creation of DSS1 interface

The DSS1 (30 B + D) interface is created with the following MML commands:

Connect ET, command WUC , interface DSS1.

ZWUC

:ET,72:ET2E,0: IF=DSS1:BCSU,0: ;



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where

. ET,72 is the index of the ET

. ET1E,0 are the plug-in unit type and index

. IF=DSS1 is the interface type

. BCSU,0 are the controlling unit type and index

Change the state of the ET to SE-OU, TE-EX and WO-EX.

ZUSC

:ET,72:SE;

ZUSC:ET,72:TE;

ZUSC:ET,72:WO;

Create the D-channel with the command DSC .

ZDSC

:ISDN1:BCSU,0:72-16:U;

where

. ISDN1 is the name of the D-channel


. 72-16 are the external PCM line and the time slot of the D-channel

. U is the interface side, the user side.

Create the circuit group and the circuits with the command RCC .

ZRCC

:NCGR=ISDNABIS,CGR=100,TYPE=DCS:LSI=DSS01;

where

. NCGR=ISDNABIS is the name of the circuit group

. CGR=100 is the circuit group number

. TYPE=DCS is the circuit group type

. LSI=DSS01 is line signalling

Add circuits to the circuit group with the command RCA .

ZRCA

:NCGR=ISDNABIS:CRCT=72-1&&-15&-17&&-31,DCS=ISDN1;




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where


. CRCT=72-1&&-15&-17&&-31 are circuits to be added

. DCS=ISDN1 is the name of the D-channel in the concerned PCM line.

If several DSS1 (30 B + D) interfaces are used in the BSC, they must be managed by different BCSUs. Circuits can be added to the same circuit group. The ETmust be connected and the D-channel created before this command.

ZRCA

:NCGR=ISDNABIS:CRCT=73-1&&-15&-17&&-31,DCS=ISDN2;

where


. CRCT=73-1&&-15&-17&&-31 are circuits to be added

. DCS=ISDN2 is the name of the D-channel in the concerned PCM line.

Create the route with the command RRC .

ZRRC

:EXT:ROU=1,OUTR=DSS01,STP=1,NCGR=ISDNABIS;

where

. EXT is the route type, EXTERNAL

. ROU=1 is the index of the route

. OUTR=DSS01 is outgoing register signalling

. STP=1 is the starting point for outgoing dialling, not significant

. NCGR=ISDNABIS is the name of the circuit group.

Change the state of the circuit group with the commandCRM

.ZCRM

:CGR=100:WO;

where


. WO is the new state of the circuit group, WORKING.



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Change the state of the external route with the command CRC .

ZCRC:ROU=1:WO;

where

. ROU=1 is the route number

. WO is the new state of the route, WORKING.

Change the state of the D-channel with the command DTC .

ZDTC

:ISDN1:WO;

where. ISDN1 is the name of the D-channel

. WO is the new state of the D-channel, EXECUTE.

Change the state of the circuits with the command CEC .

ZCEC

:CRCT=72-1&&-15&-17&&-31:BA;

(ZCEC:CRCT=73-1&&-15&-17&&-31:BA;)

ZCEC:CRCT=72-1&&-15&-17&&-31:WO;

(ZCEC:CRCT=73-1&&-15&-17&&-31:WO;)

where

. CRCT=72-1&&-15&-17&&-31 are circuits, the state of which is to bechanged

. BA and WO are new states of circuits, BARRED and WORKING.

Creation of a circuit group for the time slot 0-1

Create the circuit group for the time slot 0-1 with the command RCC .

There is no need to create this circuit group if the time slot 0-1 is already situatedin a circuit group.

ZRCC

:NCGR=TONES,CGR=99,TYPE=SPE: FORMAT=0,HUNTED=Y;

where




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. NCGR=TONES is the name of the circuit group


.

TYPE=S is the circuit group type, semipermanent . FORMAT=0 is the circuit format

. HUNTED=Y is circuit hunted

Add circuit to the circuit group with the command RCA .

ZRCA

:NCGR=TONES:CRCT=0 1 ;

where

. NCGR=TONES is the name of the circuit group

. CRCT=0 1 is circuit to be added

Creation of ISDN Abis BCF and TRX D-channels

Create the BCF D-channel with the command DSE .

ZDSE

:BCF07:BCSU,0:62,1 :16,0-0 ,0 ;

where. BCF07 is the name of the D-channel


. 62 is the service access point identifier for the BCF D-channel

. 1 is the terminal end point identifier

. 16 is the bit rate of the D-channel

. 0-0,0 are the external PCM line, TSL and SUB_TSL, always 0-0,0 for

ISDN BCF.

Create the TRX D-channel with the command DSE .

ZDSE

:T0701:BCSU,0:0 ,1 :16,0-0 ,0 ;

where



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. T0701 is the name of the D-channel


.

0 is the service access point identifier for the TRX D-channel. 1 is the terminal end point identifier for the first TRX D-channel of the

BCF

. 16 is the bit rate of the D-channel; can also be 32 for an ISDN TRX if half rate is used

. 0-0,0 are the external PCM line, TSL and SUB_TSL, always 0-0,0 for anISDN TRX.

Create the TRX D-channel for the second ISDN Abis TRX with the commandDSE .

This is needed if the second ISDN Abis TRX exists at the BTS.

ZDSE

:T0702:BCSU,0:0 ,2 :16,0-0 ,0 ;

where

. T0702 is the name of the second D-channel


. 0 is the service access point identifier for the TRX D-channel

. 2 is the terminal end point identifier for the second TRX D-channel of theBCF

. 16 is the bit rate of the D-channel; can also be 32 for an ISDN TRX if half rate is used

. 0-0,0 are the external PCM line, TSL and SUB_TSL, always 0-0,0 for anISDN TRX.

Creation of ISDN Abis BCF

Create the BCF with the command EFC .

ZEFC

:7,D:DNAME=BCF07:TEST=NOT:BBU=NONE:;

where




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. DNAME=BCF07 is the name of the BCF D-channel, which is located inthe ISDN connection

. other parameters are as normal BCF parameters.

Creation of ISDN Abis BTS

Create the BTS with the command EQC. (See also Base Transceiver StationHandling in BSC (EQ).)

ZEQC

:BCF=7,BTS=7,NAME=ISDN7, :CI=507,BAND=900:NCC=0,BCC=0:

MCC=520,MNC=18,LAC=5:HOP=N,UHOP=N:;

where all parameters are as in a normal BTS.

Creation of ISDN Abis TRX

Create the ISDN Abis TRX with the command ERC .

ZERC

:BTS=7,TRX=1:TRA=ISDN,:FREQ=53,TSC=0:DNAME=T0701:SIGN=2,

TLOC=0,OLOC=2,TEL=123456789,CH0=MBCCHC,CH1=NOTUSED:;

where

. TRA=ISDN is the transmission type, ISDN

. FREQ=53 is absolute radio frequency number

. TSC=0 is the training sequence code

. DNAME=T0701 is the name of the TRX D-channel, which is located inthe ISDN connection

. TLOC=0 is the location of the TRX D-channel

. OLOC=2 is the location of the BCF D-channel (only if the BCF D-channelis located in the ISDN connection)

. TEL=123456789 is an ISDN telephone number in the TRX

. other parameters as in a normal TRX.

Create the second ISDN Abis TRX to the BTS with the command ERC .

ZERC

:BTS=7,TRX=2:TRA=ISDN,:FREQ=54,TSC=0:DNAME=T0702:SIGN=1,

TLOC=0,TEL=1122334455,CH0=NOTUSED:;

where



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. TRA=ISDN is the transmission type, ISDN

. DNAME=T0702 is the name of the TRX D-channel, which is located inthe ISDN connection

. TLOC=0 is a location of the TRX D-channel

. TEL=1122334455 is an ISDN telephone number in the second TRX

. other parameters as in a normal TRX.

Definition of BSC call number

Set the BSC call number with the command EEM .

This is a BSC parameter and must be defined only once.

ZEEM

:BCN=987654321: ;

where BCN=987654321 is the BSC call number.

Other radio network parameters

Set other parameters as for a normal BCF, BTS and TRX.

State changes of BCF, BTS and TRX

Change the state of the TRX from LOCKED to UNLOCK.

ZERS

:BTS=7,TRX=1:U;

If the second TRX exists:

ZERS:BTS=7,TRX=2:U;

Change the state of the BTS from LOCKED to UNLOCK.

ZEQS

:BTS=7:U;

Change the state of the BCF from LOCKED to UNLOCK. (See also BaseControl Function Handling (EF).)

ZEFS

:7:U;




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2.4 Testing of activation

This feature can be tested by setting the state of the ISDN TRX from LOCKED to

UNLOCK. After that, normal GSM calls should be performed via the ISDNTRX.

2.4.1 Test environment

MSC : one MSC

BSC : one S8 or later BSC

BTS : one BTS with the ISDN interface card

MS : two MSs

2.4.2 Prerequisites for testing

Make sure that the MSs perform calls only via the ISDN TRX.

2.4.3 Test execution and expected results

Change the state of the ISDN TRX from LOCKED to UNLOCK. The BCF andthe BTS must be in the UNLOCK state and the second TRX must be in theLOCKED state before the following command:

ZERS

:BTS=7,TRX=1:U;

Check the states of the TRX and BCF links:

ZDTI

:NAME=T0701;

ZDTI:NAME=BCF07;

where

. T0701 is the name of the TRX D-channel

. BCF07 is the name of the BCF D-channel.

They must be in the EXECUTE state.

Check the state of the ISDN TRX:



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ZERO

:BTS=7,TRX=1;

. The state of the TRX must be UNLOCK.

. The state of the channels must be WO.

Make a GSM call.

If the GSM call succeeds, the ISDN Abis feature is activated.

Check that radio resources have been reserved for GSM calls from the ISDNTRX concerned.

ZERO:BTS=7,TRX=1;




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3 Deactivating and testing BSS6011: ISDNAbis (ETSI)

Check the reserved DSS1 interface circuits:

ZCEL

:CGR=100;

where

. CGR=100 is the index of circuit group

Change the state of the ISDN TRX from UNLOCK to LOCKED:

ZERS

:BTS=7,TRX=1:L;

3.1 Testing of deactivation

Check the reserved DSS1 interface circuits:

ZCEL

:CGR=100;

The number of the reserved circuit must be two less than in the sectionDeactivation of feature . (This means that DSS1 circuits are released).

Check the data of the BCF and TRX D-channels :

ZDSB

:NAME=T0701;

ZDSB:NAME=BCF07;

PCM and TSL data must be zero - zero.

Check the states of the BCF and TRX D-channels:



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ZDTI

:NAME=T0701;

ZDTI:NAME=BCF07;

BCF link only if it is located in the ISDN TRX.

The states must be AD, DENY ACTIVATION.

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