ISO/IEC ISP 10609-20:1995

INTERNATIONAL
ISO/IEC
STANDARDIZED
PROFILE
10609-20
First edition
1995-12-15
Information technology - International
Standardized Profiles TB, TC, TD and
TE - Connection-mode Transport Service
over connection-mode Network Service -
Part 20:
Overview of the generalized multi-part ISP
structure for TC and TD Group profiles for OSI
usage of ISDN
Technologies de Unformation - Profils normalk& interna tionaux TB, TC,
TD et TE - Service de transport en mode connexion sur Service de
rbseau en mode connexion -
Partie 20: Introduction 3 Ia structure g&GraMe ISP multipartite pour /es
profils de groupes TC et TD
Reference number
ISO/IEC ISP 10609-20:1995(E)

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ISO/IEC ISP 10609-20: 1995(E)
Page
Contents
. . .
111
. . . . . . . . . . . “.~
Foreword
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .~. vi
Introduction
1
1 Scope .
1.1 General . 1
.................................................................................................................. 1
1.2 Position within the taxonomy
2
1.3 Scenario . .*.*.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .~. 3
2 Normative references
4
3 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5 Overview of multi-part structure for OSVISDN T-profiles . 5
5.1 Description of the multi-part OSUISDN T-Profile architectural structure . 5
........................................................................................................... 12
5.2 B and D-channel protocol Stacks
5.3 Architectural simplicity of the multi-part OSUISDN T-Profile structure . 12
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Annex A: Charme1 selection through cal1 offering
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Annex B: Titles of profiles and all ISP Parts referenced in the OSVISDN T-profiles
0 ISO/IEC 1995
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
means, electronie or mechanical, including photocopying and microfilm, without permission in writing from the publisher.
ISO/IEC Copyright Office l Case postale 56 l CH-121 1 Geneve l Switzerland
Printed in Switzerland

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0 ISO/IEC ISO/IEC ISP 10609-20: 1995(E)
Foreword
ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission)
form the specialized System for worldwide standardization. National bodies that are members of ISO or IEC
participate in the development of International Standards through technical committees established by the respective
organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in
fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO
and IEC, also take part in the work.
In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1.
In addition to developing International Standards, ISOLIEC JTC 1 has created a Special Group on Functional
Standardization for the processing of International Standardized Profiles.
An International Standardized Profile is an i nternationally agreed, harmonized document which
identifies a Standard
or group of Standards, together with Options and Parameters, necessary to accomplish a function
or set of functions.
Draft International Standardized Profiles are circulated to national bodies for voting. Publication as an International
Standardized Profile requires approval by at least 75% of the national bodies casting a vote.
International Standardized Profile of ISO/IEC ISP 10609-20 was prepared with the collaboration of
- Asia-Oceania Workshop (AOW);
- European Workshop for Open Systems (EWOS);
Open Systems Environment Implernentors’ Workshop (OIW).
ISOAEC ISP 10609 consists of the following parts, under the general title Information technology - International
Standardized Profiles TB, TC, TD and TE - Connection-mode Transport Service over connection-mode Network
Service:
Part 1: Subnetwork-t-ype independent requirements for Group TB
Part 2: Subnetwork-type independent requirements for Group TC
Part 3: Subnetwork-type independent requirements for Group TD
Part 4: Subnetwork-type independent requirements for Group TE
Part 5: Definition of profiles TBl 11 l/TBll21
Part 6: Definition of profiles TC1 11 l/TCll21
Part 7: Definition of profiles TDlll l/TDll21
Part 8: Definition of profiles TE1 11 l/TEll21
Part 9: Subnetwork-type dependent requirements for Network Layer, Data Link Layer and Physical
Layer concerning permanent access to a packet switched data network using virtual calls
Part 10: LAN subnetwork-dependent, media-independent requirements
. . .
111

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ISO/IEC ISP 10609-20: 1995(E) 0 ISO/IEC
Part 11: CSMAKD LAN subnetwork-dependent, media-dependent requirements
Part 12: Definition of Profile TC51, Provision of the QSI connection-mode Transport Service using
the OSI connection-mode Network Service in an End System attached to a CSMAKD LAN
Part 14: Definition of Profile TC53, Provision of the OSI connection-mode Transport Service using
the OSI connection-mode Network Service in an End System attached to a Token Ring LAN
Part 15: Definition of Profile TC54, Provision of the OSI connection-mode Transport Service using
the OSI connection-mode Network Service in an End System attached to an FDDI LAN
Part 20: Overview of the generalized multi-part ISP structure for TC and TD Group profiles for 057
usage of ISDN
Part 2 1: Subnetwork-type dependent requirements for Network Layer and Data Link Layer for ISDN
B-channel X.25 DTE to DTE Operation
Part 22: Subnetwork-type dependent requirements for Network Layer and Data Link Layer for ISDN
B-channel X.25 DTE to DCE Operation
Part 23: Subnetwork-type dependent requirements for Network Layer and Data Link Layer for Data
Transfer concerning a packet switched mode Integrated Services Digital Network using virtual calls:
B-channel access case
Part 24: Subnetwork-type dependent requirements for Network Iayer and Data Link Layer for Data
Transfer concerning a packet switched mode Integrated Services Digital Network using virtual calls:
D-channel access case
Part 25: Subnetwork-type dependent requirements for Q.931 circuit-switched Operation
Part 26: Subnetwork-type dependent requirements for Network Layer for Cal1 Control procedures
concerning the outgoing cal1 of a packet switched mode Integrated Services Digital Network in case
B using virtual calls
Part 27: Subnetwork-type dependent requirements for Network Layer for Cal1 Control procedures
concerning the incoming cal1 of a packet switched mode Integrated Services Digital Network in case
B using virtual calls
Part 28: Subnetwork-type dependent requirements for Data Link Layer for end Systems attached to
an ISDN subnetwork
Part 30: De$nition of Profile TC1 131
Part 31: DeBnition of Profile TC1 231
Part 32: Definition of Profile TC41 11
Part 33: DeBnition of pro$le TC421 1
Part 34: Definition of Profile TC431 11
Part 35: Definition of Profile TC431 12
iv

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0 ISO/IEC
ISO/IEC ISP 10609-20: 1995(E)
Part 36: Definition of Profile TC4321 1
Part 37: Definition of Profile TC43212
Part 38: Definition of Profile TC4331
Part 40: Definition of Profile TDI 131
Part 41: Definition of Profile TDI 231
Part 42: Definition of Profile TD4111
Part 43: Definition of Profile TD4211
Part 44: DeBnition of Profile TD43111
Part 45: Definition of projZe TD43112
Part 46: Definition of Profile TD43211
Part 47: Definition of projile TD43212
Part 48: DeBnition of Profile TD4331
Annexes A and B of this part of ISO/IEC ISP 10609 are for information only.

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0 ISO/IEC
ISO/IEC ISP 10609-20: 1995(E)
Introduction
This International Standardized Profile (ISP) is defined in accordance with the principles specified by ISO/IEC
Technical Report 10000, “Information technology - Framework and taxonomy of International Standardized
Profiles ”.
The context of Functional Standardization is one area in the Overall field of Information Technology (IT)
standardization activities, covering base Standards, profiles, and registration mechanisms. A Profile defines a
combination of base Standards that collectively perform a specific well-defined IT function. Profiles standardize
the use of Options and other variations in the base Standards, and provide a base for the development of uniform,
internationally recognized System tests.
ISPs are produced not simply to “legitimize” a particular choice of base Standards and Options, but to promote
real System interoperability. One of the most important roles for an ISP is to serve as the basis for the
development (by organizations other than ISO and IEC) of intemationally recognized test methods. The
development and widespread acceptance of tests based on this and other ISPs is crucial to the successful
realization of this goal.
ISO/IEC ISP 10609 consists of several Parts of which this is part 20. This part of ISO/IEC ISP 10609 provides
information on the structure and relationship of the ISDN based Profile Parts to each other and to other Parts of
ISO/IEC ISP 10609. There are further Parts which specify Profile requirements that are subnetwork-independent
or specific to particular types of subnetwork. In addition, for each individual Profile there is a part of ISO/IEC
ISP 10609 which identifies the specific requirements of that Profile, making reference to appropriate material
from Parts 2 or 3, and from the subnetwork dependent Parts of ISO/IEC ISP 10609.
Vl

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ISO/IECISPl0609-20:1995(E)
INTERNATIONAL STANDARDIZED PROFILE 0 ISO/IEC
International Standardized
Information technology -
Connection-mode
Profiles TB, TC, TD and TE -
Transport Service over connection-mode Network
Service -
Part 20:
Overview of the generalized multi-part ISP structure for TC
and TD Group profiles for OS1 usage of ISDN
1 Scope
General
11 .
ISO/IEC ISP 10609 is applicable to end Systems concemed with operating in the Open Systems Interconnection
(OSI) environment. It specifies a combination of OS1 Standards, which collectively provide the connection-mode
Transport Service using the connection-mode Network Service.
This part of ISO/IEC ISP IO609 provides an overview of the multi-part structure for the ISDN TA profiles
(which provide the Connection-mode Transport Service (COTS) using the Connectionless-mode Network
Service (CLNS)) and for the ISDN TC and TD profiles (which provide the Connection-mode Transport Service
(COTS) using the Connection-mode Network Service (CONS)).
12 . Position within the taxonorny
This part of ISO/IEC ISP 10609 covers the taxonomy elements using an ISDN subnetwork with Transport
Groups TA, TC and TD as described in the ISO/IEC TR 10000-2. In particular, it provides an overview and
description of a generalized multi-part structure covering the following ISDN ISPs:
0
Tx 1131,Tx 1231,Tx411I,Tx42lI,Tx431Iq,Tx4321qandTx4331 (Tx=TA,TCandTDandq=l or
.
2)
0
TA => COTS over CLNS (to be developed)
e
TC => COTS over CONS with Mandatory Transport Protocol Classes 0 and 2
0
TD => COTS over CONS with Mandatory Transport Protocol Class 0

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ISO/IEC ISP 10609=20:1995(E) 0 ISO/IEC
13 . Scenario
Figure 1 illustrates the seven access seenarios’ relevant to the ISDN based ISPs, as contained in ISOAEC TR
10000-2. Figure 2 Shows the end System configuration applicable to the seven access seenarios illustrated in
figure 1.
B
: Tx 1131
i ; +x 1231 ! ]
B ; Tx4111 / 1
1 *wi:F;% T. [ PSDN )
Remote DTE
B ‘Tx4331 \ 1
X.75 or internal
, ‘Network Protocol
S/T Reference Point
PR1 or BR1 (1)
(1) => An S/T Reference Point designates a “T reference point ”, an “S reference point” or
a “coincident S and T reference point.”
Figure 1 - Illustration of the acsess seenarios
t ,
Tx nnnn or (1)
(1)
Remote
(2)‘
Tx nnnnq
‘8 ISDN ‘r
. I(*) ’
’ End System
Reference
,
End System
(3)
S/T Reference Point
PR1 or BR1
Any of the Profile numbers shown in Figure 1
nnnn =>
=
>
X A, C, or D
=>
Takes the value 1 or 2 in Tx 43 1 lq and Tx 4321q profiles to indicate whether Q.93 1 is needed
9
=
The end System supports appropriate Stack of protocols
(1)
(2) == Virtual circuit or circuit switched bearer Service, permanent* or demand access channel.
X.25 Permanent Virtual Circuits (PVCs) are outside the scope of ISO/IEC ISP 10609.
(3) => An S/T Reference Point designates a “T reference Point ”, an “S reference Point” or
a “coincident S and T reference Point.”
* =
>
This tan be an ISDN or a PSPDN sub-network or other OS1 relays or null
( )
* Permanent and Semi-Permanent accesses are the same from the view of a DTE and as such, the usage
“Permanent” is used throughout this part of ISO/IEC ISP 10609.
Figure 2 - Scenario of applicability of the COTSKONS and COTSKLNS Tx profiles
’ Five of these access seenarios (i.e., Tx 1131, Tx 1231, Tx 4311q, Tx 4321q and Tx 4331) are defined in CCITI
Recommendations X.3 1 and X.612, and ISO/IEC 9574. The two remote access to DTE seenarios (i.e., Tx 4111 and Tx
4211) are defined in ISO/IEC 9574/DAM 1 and draft revision of CCITT Recommendation X.612 (but not described in
CCITT Recommendations X.3 1). Profiles Tx 43 1 lq and Tx 4321q are further sub-classified by use of a fifth digit “q” (q = 1
or 2) depending on the need for using the signaling protocol Q.93 1 (e.g., for Tx 43 1 lq, the fifth digit “1” in Tx 43 111
represents no need for the use of Q.93 1 whereas the fifth digit “2” in Tx 43 112 represents the need for the use of the
signaling protocol Q.93 1).
2

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ISO/IEC ISP 10609-20: 1995(E)
0 ISO/IEC
2 Normative references
The following documents contain provisions which, through reference in this text, constitute provisions of this
part of ISO/IEC ISP 10609. At the time of publication, the editions indicated were valid. All documents are
subject to revision, and Parties to agreements based on this part of ISO/IEC ISP 10609 are warned against
automatically applying any more recent editions of the documents listed below, since the nature of references
made by ISPs to such documents is that they may be specifk to a particular edition. Members of IEC and ISO
maintain registers of currently valid International Standards and ISPs, and ITU-T maintains published editions of
its current Recommendations.
ISOIIEC 7776: 1995, Information technology - Telecommunications and information exchange between Systems -
High-level data Zink control procedures - Description of the X. 2.5 LAPB-compatible DTE data link procedures.
ISO/IEC 8073: 1992, Information technology - Telecommunications and information exchange between Systems -
Open Systems Interconnection - Protocol for providing the connection-mode transport Service.
Data communications - X.25 Packet Layeu Protocol for
ISO/IEC 8208: 1995, Information technology - Data
Terminal Equipment.
ISO/IEC 8348: 1993, Information technology - Open Systems Interconnection - Network Service Definition.
ISO/IEC 8473- 1: 1994, Information technology - Protocol for providing the connectionless-mode network
Service: Protocol specification. [See also ITU-T Recommendation X.233 (1993)]
NOTE - ISO/IEC 7776: 1995, ISO/IEC 8073: 1992, ISO/IEC 8208: 1995, ISO/IEC
8348: 1993 and ISO/IEC 8473-1: 1994
supersede ISO 7776: 1986, ISO 8073: 1988, ISO/IEC 8208: 1990, ISO
8348: 1987 and ISO 8473: 1988 respectively. However,
when this part of ISO/IEC ISP 10609 was under development, the previous editions were valid and this part of ISO/IEC ISP
10609 is therefore based on these editions. The new editions give extensions and incorporate all of the amendments and
corrigenda to the previous editions, which are listed below.
ISO 7776: 1986, Information processing Systems - Data communications - High-level data link control procedures -
Description of the X.25 LAPB-compatible DTE data linkprocedures.
Information processing Systems - Open Systems Interconnection - Connection-mode transport protocol
ISO 8073: 1988,
specification.
ISO 8073: 1988lAdd. 2: 1989, Information processing Systems - Open Systems Interconnection - Connection-mode transport
network Service.
protocol specification, Addendum 2: Class four Operation over connectionless
ISO/IEC 8208: 1990, Information technology - Data communications - x.25 Packet Layer Protocol for Data Terminal
Equipment.
ISO 8348: 1987, Information processing Systems - Data communications - Network Service definition.
ISO 8348: 1987lAdd. 1: 1988, Information processing Systems - Data communications - Network Service definition,
Addendum 1: Connectionless-mode transmission.
ISO 8473 : 1988, Information processing Systems - Data communications - Protocol for providing the connectionless-mode
network Service.
ISO/IEC 8878: 1992, Information technology - Telecommunications and information exchange between Systems -
Use of X. 2.5 to provide the OSI Connection-mode Network Service.
ISOIIEC 8878: 1992Kor. 1: 1993, Information technology - Telecommunications and information exchange
Use of X 25 to provide the OSI Connection-mode Network Service, Technical Corrigendum 1.
between Systems -
ISO/IEC 8878: 1992lCor.2: 1993, Information technology - Telecommunications and information exchange
between Systems - Use of X. 25 to provide the OSI Connection-mode Network Service, Technical Corrigendum 2.
3

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0 ISO/IEC
ISO/IEC ISP 10609=20:1995(E)
Telecommunications and information exchange between
ISO/IEC 9542: 1988, Information processing Systems -
Systems - End System to Intermediate System routing exchange protocol for use in conjunction with the Protocol
.
for providing the connectionless-mode network Service (ISO 8473).
CCITT Rec. X.612 (1992) 1 ISOIIEC 9574: 1992, Information technology - Provision of the OSI connection-mode
network Service by packet mode terminal equipment connected to an integrated Services digital network (ISDN).
ISOIIEC TR 1 OOOO- 1: 1992, Information technology - Framework and taxonomy of International Standardized
Profiles - Part 1: Framework.
ISOIIEC TR 10000-2: 1994, Information technology - Framework and taxonomy of International Standardized
Profiles - Part 2: Principles and Taxonomy for OSI Profiles.
CCITT Rec. 1.430 (1988), Basic User-Network Interface - Layer I SpeciJication.
CCITT Rec. 1.43 I (1988), Primary Rate User-Network Interface - Layer I Specijication.
CCITT Rec. Q.92 1 (1988), ISDN User-Network Interface Data Link Layer Specijication.
CCITT Rec. 4.93 1 (1988), ISDN User-Network Interface Layer 3 SpeciJication for Basic Cal1 Control.
CCITT Rec. X.25 (1988), Interface between Data Terminal Equipment (DTE) and Data Circuit-Terminating
Equipment (DCE) for terminals operating in the Packet Mode and connected to Public Data Networks by
dedicated circuit.
CCITT Rec. X.3 1 (1992), Support of Packet Mode Terminal Equipment by an ISDN.
CCITT Rec. X.32 (19921, Interface between Data Terminal Equipment (DTE) and Data Circuit-Terminating
Equipment (DCE) for terminals operating in a Packet Mode and accessing a Packet Switched Public Data
Network through a Public Switched Telephone Network or an Integrated Service Digital Network or a Circuit
Switched Public Data Network.
CCITT Rec. X.2 13 (1988), Network Service Definition for Open Systems Interconnection for CCITT
Applications.
CCITT Rec. X.223 (1988), Use of X.25 to provide the OSI Connection-mode Network Service for CCITT
Applications.
CCITT Rec. X.224 (1988) Transport protocol spec$cation for Open Systems Interconnection for CCITT
applications.
3 Definitions
All the terms used in this part of ISO/IEC ISP 10609 are defined in the referenced base Standards (see clause 2).
4 Abbreviations
The following abbreviations are used in this part of ISO/IEC ISP 10609:
AU Access Unit
Basic Rate Interface
BRI
CLNP Connectionless-mode Network Protocol
CLNS Connectionless-mode Network Service
Circuit Mode
CM
CONS Connection-mode Network Service
4

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ISO/IEC ISP 10609-20: 1995(E)
0 ISO/IEC
COTS Connection-mode Transport Service
Circuit Switched
CS
CSPDN Circuit Switched Public Data Network
DA Demand Access
DCE Data Circuit-terminating Equipment
DTE Data Terminal Equipment
ET Exchange Termination
ISDN Integrated Services Digital Network
LAPB Link Access Protocol - Balanced
LAPD Link Access Protocol on the D-channel
NL Network Layer
PH Packet Handler
PLP Packet Layer Protocol
PM Packet Mode
PRI Primar-y Rate Interface
PSPDN Packet Switched Public Data Network
Packet Switched
PS
PVC Permanent Virtual Circuit
vc Virtual Circuit
Overview of multi-part structure for OSUISDN T-profiles
5
The multi-part ISP structure described in this clause for the OSI/ISDN T-profiles, corresponding to the seven
access seenarios shown in figure 1, has two purposes.
1. The multi-part ISP structure provides a “roadmap” in terms of the common Parts in figure 3-2 to specifl an
OSI/ISDN T-Profile.
2. The multi-part structure also Points out an architectural simplicity, from a DTE view Point, for the
implementation of multiple profiles.
One of the principal differentes among the various access seenarios is the use of the signaling protocolQ.93 1 for
the B-channel setup and its use in channel selection through cal1 offering. The relationship between Q.93 1 cal1
offering procedures and notification classes is described in annex A.
Subclause 5.1 describes how a roadmap, in terms of the common Parts, tan be constructed to specifl an
OSI/ISDN T-Profile. Subclause 5.2 describes a general arrangement for the B and D-channel protocol Stacks that
are applicable to all the access seenarios described in figure 1. Subclause 5.3 illustrates the architectural
simplicity of the multi-part OSI/ISDN T-Profile structure from a DTE view Point.
51 . Description of the multi-part OWISDN T-Profile architectural structure
The multi-part OSI/ISDN T-Profile architectural structure for the seven access seenarios in figure 1 is shown in
table 1. The rows of table 1 show the access seenarios identified by the ISP # that is specified in ISO/IEC TR
10000-2 (see also figure 1). The three major columns (i.e., Access Attributes Description, D- and B-Charme1
columns) describe various characteristics associated with the access seenarios. The group of sub-columns under
the “Access Attributes Description” column specify the attributes (e.g., type of ISDN bearer Service) pertaining
to a particular access scenario. The group of sub-columns under the D- and B-channel columns specifies
significant components of the protocol Stacks for each scenario and, in particular, identifies the significant
common part (e.g. 10609-25 for Q.93 1 Circuit Mode) referenced by each resulting OSI/ISDN T-Profile.
The “D-CHANNEL” column is sub-divided into two sub-columns as 4.93 1 and X.25 PLP representing whether
the D-channel is used for 4.93 1 signaling or X.25 PLP or both. The 4.93 1 channel setup is further sub-divided
into the circuit mode (CM) and packet mode (PM) sub-columns. The need for the use of the 4.93 1 signaling
protocol for setting up a B-channel is indicated by “YES” in the appropriate “CM ”, “PM-OUT” or “PM-IN” sub-
5

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ISO/IEC ISP 10609-20: 1995(E)
0 ISO/IEC
columns. A “YES” in Q.931 “CM” or “PM-IN” sub-columns may also indicate the use of 4.93 1 on the D-
channel for the cal1 offering procedures when they are applicable. The seenarios in which the cal1 offering
procedures are applicable are the virtual circuit bearer Service (i.e. Case B) seenarios. Tx 4331 Profile is an
example case in which 4.93 1 is used for the outgoing calls.
When X.25 PLP is used on a B-channel, a further distinction must be made as to whether X.25 PLP and ISO
7776 operate in a DTE/DCE or DTE/DTE mode. Note 1 in the DTE/DTE and DTE/DCE sub-columns under the
B-channel column in table 1 indicates the common Parts used corresponding to the use of X.25 PLP and ISO
7776 protocols.
Figure 3-l Shows the general layout of the multi-part OSVISDN T-Profile structure. The “Common Parts” shown
in figure 3-2 are used by two or more access seenarios. The items on the left represent common Parts for TA
(COTS over CLNS) profiles in support of the protocols in the ISDN bearer channel (e.g., ISO 8473, ISO 7776 or
Q.921) while those on the right represent the same aspects for TC/TC (COTS over CONS) profiles. Figures 3-3,
3-4 and 3-5 show protocols at each layer up to the Transport Layer and indicate the common part numbers
applicable for a particular Profile. These figures cover all the Tx nnnnq (where x = A, C and D) profiles. The
notation “9-r&’ used in the D-channel sub-columns in table I , for example, denote the comrnon Parts “ 10609-nn”
in figure 3-2. Annex B lists the titles of all of the Parts referenced in figures 3-l through 3-5.
NOTE - Although references are made in figures 3-l through 3-5 to Parts of ISO/IEC ISP 10608, there is no effort at this
time to develop these profiles. The purpose of the references in the figures is to provide the structure of the T-
profiles.
Table 1 - Multi-part OWISDN T-Profile structure for the access seenarios in figure 3
Access Attributes Description D-Channel
B-Channel
ISDN ISDN Q.931
x.25 X.25PLP/
Service Channel Access To CM PM PLP
ISO 7776
PH in Remote
CM VC B B D AU 9-25 OUT IN DTE/ DTE/
9-24
ISP #
DTE
in ISDN 9-26
Perm. DA 9-27 DCE DTE
Note 1 Note 1
ISDN
YES YES
Tx 1131 YES
YES YES
Tx 1231 YE$
Note 2
I YES
1 Tx4111 YES
I YES I
YES
Tx4211 YES
YES
Tx43111
YES
YES
YES
NOTE 1 - The common Parts corresponding to the use of X.25 PLP and ISO 7776 in B-Channel in the DTE/DCE and
DTE/DTE mode of Operation are shown in figures 3-3 through 3-5. These protocols operate over the ISDN Layer
1 protocols (i.e., 1.430/1.43 1).
NOTE 2 - Rec. X.3 1 allows use of 4.93 1 cal1 offering for the conditional notification class.
NOTE 3 - The need for the cal1 offering procedures in virtual circuit configuration depends on provisioning of D- and B-
channels and provisioning of notification class (for q=2).
=>
CM Circuit Mode
=>
DA Demand Access
=>
PM Packet Mode
=>
Perm. Permanent
=>
vc Virtual Circuit
6

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ISO/IEC ISP 10609-20: 1995(E)
0 ISO/IEC
COTSKONS
COTWCLNS
10609-20
10608-20
.
1.
1
1 THIS DOCUMENT 1
[
TD 10609-3
I
TC 10609-2
ISO 8073
j ~so*073aAdd~1, /
r Se;?;;.; 3-3 ,~
See Figure 3-3
TA 1131
I l
TA1231 1,
I
X.3 1 CASE A
X.31 CASE A ’
See Figure 3-4
TA4111
1
l
TA4211
I
COMMON PARTS
CM DTE/DTE CM DTE/DTE
See Figure 3-2
See Figure 3-5
TA43111
I 1
Tx 43112
TA43112
I 1
I
TA43211
I 1
TA 43212
I
TA 433 1
I 1
X.31 CASE B X.31 CASE B
x=C,D
Figure 3-l - Multi-part OSUISDN T-Profile structure

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0 ISO/IEC
ISO/IEC ISP 10609-20: 1995(E)
10609-9 DTE/DCE
DTE/DCE
10608-5
ISO 8878
ISO 8473, ISO 9542
l
l /
ISO 8208
I I
ISO 7776
I I
X.2UX.2 1 bisN-series
r- /
10609-21 DTE/DTE
10608-2 1 DTE/DCE
ISO 9574 AM 1
with ISO 8878
ISO 8208
ISO 8208*
~~ ~~
I
I I
10609-25 ISO 7776
ISO 7776 10609-26
I I
10608-22 DTE/DCE
1 10608-22 DTE/DCE
lys,lo/
ISO 8473, ISO 9542
c
ISO 8208
I
10609-27 10609-28
B-Ch. 10608-23 B-Ch.
10608-23
ISO 9574 with
ISO 8473, ISO 9542
ISO 8878
ISO 8208 ISO 8208
I I I
ISO 7776 ISO 7776
r- I
I
c
D-Ch. 10608-24 D-Ch.
10608-24
ISO 9574 with
ISO 8473, ISO 9542
ISO 8878
ISO 8
...