ETSI ETS 300 100 ed.1 (1992-01)

Integrated Services Digital Network (ISDN); Routing in support of ISUP Version 1 services

T/N 23-03

Digitalno omrežje z integriranimi storitvami (ISDN) – Usmerjanje kot pomoč storitvam ISUP, različica 1

General Information

• Status: Published
• Publication Date: 21-Jan-1992
• Technical Committee: NA 2 - Numbering, Addressing, Routeing & Interworking
• Current Stage: 12 - Completion
• Due Date: 12-Jul-1991
• Completion Date: 22-Jan-1992
• Ref Project: SIST ETS 300 100 E1:2003 - Integrated Services Digital Network (ISDN); Routing in support of ISUP Version 1 services

Standards Content (Sample)

SLOVENSKI STANDARD
SIST ETS 300 100 E1:2003
01-december-2003
'LJLWDOQRRPUHåMH]LQWHJULUDQLPLVWRULWYDPL,6'1±8VPHUMDQMHNRWSRPRþ
VWRULWYDP,683UD]OLþLFD
Integrated Services Digital Network (ISDN); Routing in support of ISUP Version 1
services
Ta slovenski standard je istoveten z: ETS 300 100 Edition 1
ICS:
33.080 Digitalno omrežje z Integrated Services Digital
integriranimi storitvami Network (ISDN)
(ISDN)
SIST ETS 300 100 E1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ETS 300 100 E1:2003

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SIST ETS 300 100 E1:2003
EUROPEAN ETS 300 100
TELECOMMUNICATION January 1992
STANDARD
Source: ETSI TC-NA Reference: T/N 23-03
ICS: 33.080
ISDN, routing
Key words:
Integrated Services Digital Network (ISDN);
Routing in support of ISUP version 1 services
ETSI
European Telecommunications Standards Institute
ETSI Secretariat
F-06921 Sophia Antipolis CEDEX - FRANCE
Postal address:
650 Route des Lucioles - Sophia Antipolis - Valbonne - FRANCE
Office address:
c=fr, a=atlas, p=etsi, s=secretariat - [e-mail]
X.400: Internet:
Tel.: [phone] - Fax: [phone]
Copyright Notification: No part may be reproduced except as authorized by written permission. The copyright and the
foregoing restriction extend to reproduction in all media.
© European Telecommunications Standards Institute 1992. All rights reserved.
New presentation - see History box

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ETS 300 100: January 1992
Whilst every care has been taken in the preparation and publication of this document, errors in content,
typographical or otherwise, may occur. If you have comments concerning its accuracy, please write to
"ETSI Editing and Committee Support Dept." at the address shown on the title page.

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Contents
Foreword.5
1 Scope .7
2 Normative references .7
3 Symbols and abbreviations.8
4 Additions and/or clarifications to CCITT Recommendation E.172 [1].9
4.1 Paragraph 6: Signalling Capability .9
4.2 Annex A to E.172 .9
4.3 Annex B to E.172 .9
5 Additional information on parameters used for routing .9
5.1 Use of the Transmission Medium Requirement parameter .9
5.2 Capability of signalling systems to support various TMRs .10
5.3 Relationship between requested service and TMR values.11
5.4 ISUP preference indicator values for ISDN services .11
5.4.1 General . 11
5.4.2 Services requiring "ISUP Required".12
5.4.3 Services requiring "ISUP Preferred".12
5.4.4 Services requiring "ISUP Not Required".12
6 Interworking requirements for the support of PSTN/IDN services in ISDN .12
6.1 Interworking between TUP/channel associated signalling and ISUP.12
6.1.1 Interworking from TUP/channel associated signalling to ISUP .12
6.1.2 Interworking from ISUP to TUP/channel associated signalling systems .12
6.2 Interworking between TUP+ and ISUP.13
6.2.1 Interworking from TUP+ to ISUP .13
6.2.2 Interworking from ISUP to TUP+ .14
6.3 Interworking impact on supplementary services .15
6.4 Service interworking/intercommunication and fall back.16
6.4.1 Impact on service interworking and intercommunication on routing.16
7 Selection of path/traffic distribution .18
Annex A (normative): Support of supplementary services in ISDN by ISUP version 1.19
Annex B (informative): Bibliography.19
History.20

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Foreword
This European Telecommunication Standard (ETS) has been produced by the Network Aspects (NA)
Technical Committee of the European Telecommunications Standards Institute (ETSI), in co-operation with
the Signalling Protocols and Switching Sub-Committee, and with the T/SF Committee of the Conference of
European Posts and Telecommunications.
This ETS is based on CCITT Recommendation E.172 [1] as given in the CCITT Blue Book, Volume II,
Fascicle II.2, 1988. The requirements of this CCITT Recommendation shall apply together with the
additional elements, and subject to the clarifications identified in this ETS.
CCITT Recommendation I.335 [2], as given in the CCITT Blue Book, Volume II, Fascicle III.8, 1988
describes the use of the ISUP Transmission Medium Requirement for routing.
This ETS has been prepared in support of the ISDN, as defined in ETSI Technical Report ETR 010 "The
ETSI Basic Guide on the European Integrated Services Digital Network (ISDN)", which contains a
complete list of services which the ISDN will provide. This ETS also supports services and capabilities as
specified in ETS 300 121 [3].

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1 Scope
This standard gives guidance on call routing during the implementation of ISDN in Europe, as defined by
the Memorandum of Understanding on the Implementation of the ISDN in Europe in 1992.
It is applicable to the functions required at ISDN international gateways and international transit exchanges
for routing and network planning in order to achieve practical international interconnection of networks.
The relevant CCITT routing recommendations are identified and clarifications and additions to them are
provided where necessary.
This standard is produced in connection with the implementation of ISDN services, using either ISUP
version 1 or CEPT No. 7 TUP+ in the international network. This standard covers the services which are
supported by ISUP version 1.
The following bearer and teleservices are not within the scope of this standard:
- 2 X 64 kbit/s circuit mode bearer service;
- videotex photographic mode;
- computerised communication;
- teleaction;
- audiographic teleconferencing;
- 7 kHz telephony;
- videotelephony.
2 Normative references
This standard incorporates, by dated or undated reference, provisions from other publications. Those
normative references specific to this part are cited at the appropriate places in the text and listed below.
For dated references, subsequent amendments to, or revisions of these publications will apply to this
standard only when incorporated in it by amendment or revision. For undated references the latest edition
of the publication referred to applies.
[1] CCITT Recommendation E.172 (1988): "Call Routing in the ISDN Era".
[2] CCITT Recommendation I.335 (1988): "ISDN Routing Principles".
[3] ETS 300 121: "Integrated Services Digital Network (ISDN); Application of the
ISDN user part of CCITT Signalling System No.7 for international ISDN
interconnections; CCITT Recommendation Q.767 draft edition 3: 1990 -
modified".
[4] CCITT Recommendation I.530 (1988): "Network Interworking between an ISDN
and a PSTN".

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3 Symbols and abbreviations
BC Bearer Capability
CCITT Comité Consultatif International Telegraphic et Telephonique
CEPT Conférence des Administrations Européenes des Postes et Télécommunications
CLIP Calling Line Identification Presentation
CLIR Calling Line Identification Restriction
COLP Connected Line Identification Presentation
COLR Connected Line Identification Restriction
CUG Closed User Group
DDI Direct Dialling In
ETSI European Telecommunications Standards Institute
IDN Integrated Digital Network
IPI ISUP Preference Indicator
ISDN Integrated Services Digital Network
ISUP ISDN User Part
ITC Information Transfer Capability
MSN Multiple Subscriber Number
PSPDN Public Switched Packet Data Network
PSTN Public Switched Telephone Network
R2 Signalling System R2
SC Signalling Capability
SUB Subaddressing
TMR Transmission Medium Requirement
TP Terminal Portability
TUP Telephone User Part
TUP+ Enhanced Telephone User Part
UUS User-to-User Signalling

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4 Additions and/or clarifications to CCITT Recommendation E.172 [1]
4.1 Paragraph 6: Signalling Capability
Subclause 5.4 of this standard contains the application of the criteria for setting the IPI parameter for the
implementation of the ISDN in Europe.
In table 3 of the CCITT Recommendation, the cases "64 kbit/s unrestricted" and "ISUP not required" are
characterised by "Not applicable". The conjunction of these two values could nevertheless be used,
according to bilateral agreements, in order to provide an international digital connectivity service (see also
subclause 5.4 of this standard and Note 11 to table 4 of the CCITT Recommendation).
4.2 Annex A to E.172
The information contained in this annex is extended in subclauses 5.1 to 5.3 of this standard, to cover the
implementation of the ISDN in Europe. The interworking situation from PSTN to ISDN is further detailed in
Clause 6 of this standard.
4.3 Annex B to E.172
The application of the criteria defined in this annex to the implementation of the ISDN in Europe is specified
in subclause 5.4 of this standard.
5 Additional information on parameters used for routing
5.1 Use of the Transmission Medium Requirement parameter
The use of the ISUP Transmission Medium Requirement (TMR) parameter for routing is described in:
- CCITT Recommendation E.172 [1], paragraph 5 (h); and
- CCITT Recommendation I.335 [2], paragraphs 4.2.1 (e) and 4.4.4.4.
In addition to the statements made in the above mentioned paragraphs, the following shall apply:
The TMR shall be used for routing in the international network;
The TMR parameter shall be conveyed unchanged in the international network.
For a specific service request, one TMR value shall be used in the international network and across
internetwork boundaries. For its value see subclause 5.3.
It is recommended that national networks use the same TMR values as the international network.
Conversion from the requested service to the TMR value can then be performed in the originating local
exchange. If not done there, then the TMR information must be available from the outgoing international
gateway onwards. It is then forwarded to following exchanges, if possible even up to the destination
exchange.
At transit international exchanges as well as at incoming international gateway exchanges, the TMR shall
be examined for routing purposes, irrespective of the service requested. This does not preclude that
incoming gateway exchanges may need to examine additional information available to determine national
routing.

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5.2 Capability of signalling systems to support various TMRs
Table 1 indicates, for the different values of TMR, which international signalling systems have the capability
of carrying implicitly or explicitly the TMR information (or request):
Table 1
�˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜´˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¿
‡          ‡         Signalling systems         ‡
‡  Transmission  ˆ˜˜˜˜˜˜˜˜´˜˜˜˜˜˜˜˜´˜˜˜˜˜˜˜˜´˜˜˜˜˜˜˜˜´˜˜˜˜˜˜˜˜´˜˜˜˜˜˜˜˜·
‡ medium required ‡ CCITT ‡ CEPT  ‡ CCITT ‡ CCITT ‡    ‡ CCITT ‡
‡          ˆ˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜· No.6 ‡  R2  ‡ No.5 ‡
‡          ‡ ISUP ‡ TUP+ ‡  TUP ‡    ‡    ‡    ‡
ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜·
‡  64 kbit/s   ‡  V  ‡  V  ‡  V  ‡    ‡    ‡    ‡
‡  unrestricted  ‡    ‡(NOTE 1)‡(NOTE 3)‡(NOTE 2)‡(NOTE 2)‡(NOTE 4)‡
ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜·
‡  3,1 kHz audio  ‡  V  ‡  V  ‡  V  ‡  V  ‡  V  ‡  V  ‡
‡          ‡    ‡(NOTE 1)‡    ‡    ‡    ‡(NOTE 4)‡
ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜·
‡   speech    ‡  V  ‡  V  ‡  V  ‡    ‡    ‡    ‡
‡          ‡    ‡(NOTE 1)‡    ‡(NOTE 2)‡(NOTE 2)‡(NOTE 4)‡
ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜`˜˜˜˜˜˜˜˜`˜˜˜˜˜˜˜˜`˜˜˜˜˜˜˜˜`˜˜˜˜˜˜˜˜`˜˜˜˜˜˜˜˜`˜˜˜˜˜˜˜˜·
‡                                     ‡
‡ V:   The explicit or implicit transfer of the TMR information is   ‡
‡    possible. The signalling system definitely can be used.     ‡
‡                                     ‡
‡ NOTE 1: The TUP+ uses the Information Transfer Capability (ITC) to   ‡
‡     indicate the requested TMR (see subclause 6.2).        ‡
‡                                     ‡
‡ NOTE 2: The explicit transfer of the TMR information is not      ‡
‡     possible. This does not preclude the use of the        ‡
‡     signalling system, if:                     ‡
‡                                     ‡
‡     a) information is made available by other means        ‡
‡       (specialised trunk, particular numbering method); or    ‡
‡                                     ‡
‡     b) the configuration of the network can guarantee the     ‡
‡       provision of the requested TMR; or             ‡
‡                                     ‡
‡     c) there is further enhancement of the signalling systems   ‡
‡       in question.                        ‡
‡                                     ‡
‡ NOTE 3: The TUP provides for a possibility to indicate 64       ‡
‡     kbit/s connectivity.                      ‡
‡                                     ‡
‡ NOTE 4: CCITT Signalling system No. 5 links may not support 64 kbit/s ‡
‡     unrestricted and 3,1 kHz audio bearer service         ‡
‡     because of the splitting function.               ‡
‡                                     ‡
‡     CCITT Signalling system No. 5 does not support all kinds of  ‡
‡     modem operation e.g., V.22bis is not supported. Therefore,   ‡
‡     CCITT Signalling system No. 5 only supports the TMR speech.  ‡
‡                                     ‡
�˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜�

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5.3 Relationship between requested service and TMR values
The following table gives TMR values for ISDN services to be used across international and internetwork
boundaries:
Table 2
�˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜´˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¿
‡                 ‡      TMR value      ‡
‡   Requested service      ˆ˜˜˜˜˜˜˜´˜˜˜˜˜˜˜˜˜´˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡                 ‡speech ‡ 3,1 kHz ‡  64 kbit/s ‡
‡                 ‡    ‡ audio  ‡ unrestricted ‡
ˆ˜˜˜˜˜˜˜˜˜´˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡     ‡64 kbit/s unrestricted ‡    ‡     ‡ X      ‡
‡     ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡     ‡3,1 kHz audio      ‡    ‡  X  ‡       ‡
‡     ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜‡
‡     ‡speech         ‡  X  ‡     ‡       ‡
‡     ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡ Bearer ‡Packet Mode Case A:   ‡    ‡     ‡ X (NOTE 1) ‡
‡ Service ‡B-Channel        ‡    ‡     ‡       ‡
‡     ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡     ‡Packet Mode Case B:   ‡    ‡     ‡ X      ‡
‡     ‡B-Channel        ‡    ‡     ‡       ‡
‡     ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡     ‡Packet Mode Case B:   ‡    ‡     ‡   (NOTE 2) ‡
‡     ‡D-Channel        ‡    ‡     ‡       ‡
ˆ˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡     ‡Telephony 3,1 kHz    ‡  X  ‡     ‡       ‡
‡ Tele-  ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡services ‡Telefax Group 4     ‡    ‡     ‡ X      ‡
‡     ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡     ‡Teletex         ‡    ‡     ‡ X      ‡
‡     ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡     ‡ ISDN Syntax      ‡    ‡     ‡ X      ‡
‡     ‡ Based Videotex     ‡    ‡     ‡       ‡
ˆ˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡     ‡Telephony        ‡    ‡  X  ‡       ‡
‡PSTN/  ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡ IDN   ‡Facsimile Group 3    ‡    ‡  X  ‡       ‡
‡services ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡     ‡Voice Band Data     ‡    ‡  X  ‡       ‡
‡     ˆ˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜¯˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡     ‡Digital Connectivity  ‡    ‡     ‡ X      ‡
ˆ˜˜˜˜˜˜˜˜˜`˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜`˜˜˜˜˜˜˜`˜˜˜˜˜˜˜˜˜`˜˜˜˜˜˜˜˜˜˜˜˜˜˜·
‡ NOTE 1:  If implemented through the use of an on-demand or a   ‡
‡      semipermanent connection basis between the X.25     ‡
‡      terminal and the packet handler.            ‡
‡                                  ‡
‡ NOTE 2:  The packet mode case B D-channel does not use TMR.   ‡
‡                                  ‡
�˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜˜�
5.4 ISUP preference indicator values for ISDN service
...