SIST-TS ETSI/TS 101 773 V1.2.1:2005

• Abstract:

  Add a new clause 5.3 in order to mention the request of ATM Forum for a block of codepoints within a specific information element (the Control function element).

• Status: Published
• Publication Date: 31-Dec-2004
• ICS: 33.040.35 - Telephone networks
• Technical Committee: SPN - Services and Protocols for Networks
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jan-2005
• Due Date: 01-Jan-2005
• Completion Date: 01-Jan-2005
• Ref Project: ETSI TS 101 773 V1.2.1 (2002-08) - Services and Protocols for Advanced Networks (SPAN); Codepoints for V5 and derived protocols

SIST-TS ETSI/TS 101 773 V1.2.1:2005 is the Slovenian adoption of ETSI TS 101 773 V1.2.1 from ETSI's Services and Protocols for Advanced Networks (SPAN) committee. It specifies codepoints for messages and information elements used in V5 based standards, and it also reserves some Control function element codepoints for bodies other than ETSI. Engineers working on V5.1, V5.2, NMDS or ATM Forum interworking use it to assign and interpret signaling identifiers consistently.

What does SIST-TS ETSI/TS 101 773 V1.2.1:2005 specify?

SIST-TS ETSI/TS 101 773 V1.2.1:2005 is ETSI's master list of codepoints for V5 based standards. Its purpose is to avoid duplicate assignments and to support the allocation of new unique codepoints.

The document is organized into clauses 1 to 6, followed by history:

• Scope
• References
• Abbreviations
• Message type codepoints
• Information element identifier codepoints
• Information element codepoints reserved to bodies other than ETSI

Clause 4 covers message types, Clause 5 covers information element identifiers, and Clause 6 covers codepoints reserved to external bodies, including the ATM Forum.

What are the key requirements of SIST-TS ETSI/TS 101 773 V1.2.1:2005?

Clause 4 and Clause 5 are mainly allocation rules. The standard tells implementers how to assign new codepoints so that each protocol keeps its own unique space and future expansion remains possible.

• Clause 4.1 says new message type codepoints are to use the next available value for the related protocol. In practice, this prevents local, ad hoc assignments that could collide with future messages.
• Clause 4.1 also says that when both a new protocol and a new message are needed, the protocol identifier should be chosen so it remains unique and leaves room for more messages later.
• Clause 4.2 and Table 4.1 list the currently defined message types for PSTN, Control, Protection, BCC and Link control. For users, this table is the reference for what can be encoded on V5 based interfaces.
• Clause 5.1 says new information element identifier codepoints are taken from the next available value in the sequence for the protocol that carries them. That matters because the same identifier must not mean different things in different protocols.
• Clause 5.1 also allows a new block to be started when needed to preserve uniqueness and future growth.
• Clause 5.2 and Table 5.1 list the defined information element identifiers for variable-length and single-octet information elements. Implementers use this table when building or parsing signaling messages.
• Clause 6.2 reserves part of the Control function element coding for bodies other than ETSI. In practice, those values are not to be used for ETSI-defined functions.
• Clause 6.2 specifically shows the modified coding for octet 3 of the Control function element in EN 300 347-1, including values reserved to the ATM Forum. That is the key interworking point for implementers sharing the code space.

What terms does SIST-TS ETSI/TS 101 773 V1.2.1:2005 define?

• Asynchronous Transfer Mode (ATM) - the packet transfer technology referenced by the document and by the ATM Forum reservation.
• Access Network (AN) - the network side that connects access systems to the local exchange in V5 based arrangements.
• Local Exchange (LE) - the exchange side of the interface that the V5 standards support.
• Narrowband Multi-service Delivery System (NMDS) - one of the V5 based interfaces covered by the codepoint lists.
• Public Switched Telephone Network (PSTN) - the protocol family for which several message and information element codepoints are listed.
• Voice and Multimedia Over ATM (VMOA) - the ATM Forum service area referenced through the Loop Emulation Service using AAL2.

Who uses SIST-TS ETSI/TS 101 773 V1.2.1:2005?

SIST-TS ETSI/TS 101 773 V1.2.1:2005 is used by telecom protocol engineers, switch and access network implementers, and standards editors working on V5 based signaling. It also matters to test labs and quality teams that verify message encoding, reserved values, and interoperability between V5.1, V5.2, NMDS and LES using AAL2.

What changed in SIST-TS ETSI/TS 101 773 V1.2.1:2005 from the previous edition?

The scope states that this version adds a new Clause 5.3 to mention the ATM Forum request for a block of codepoints within the Control function element. The document history records publication as V1.1.1 in June 2000 and V1.2.1 in August 2002.

Which standards are used with SIST-TS ETSI/TS 101 773 V1.2.1:2005?

• ETSI EN 300 324-1 - defines the V5.1 interface specification for the Access Network.
• ETSI EN 300 347-1 - defines the V5.2 interface specification for the Access Network.
• ETSI EN 301 141 - defines Narrowband Multi-service Delivery System (NMDS).
• af-vmoa-0145 (2002) - defines Voice and Multimedia Over ATM - Loop Emulation Service Using AAL2.
• ETSI TS 100 347 (V1.1.1) - provides V5.2 release notes.

What does the SIST-TS ETSI/TS 101 773 V1.2.1:2005 document contain?

The document contains allocation rules and reference tables rather than protocol procedures. Table 4.1 lists message type codepoints, Table 5.1 lists information element identifiers, and Table 6.1 gives the coding of the Control function element.

It also distinguishes between variable-length and single-octet information elements and identifies reserved values. For implementers, those tables are the practical reference for encoding, decoding and assigning V5 based signaling codepoints without collisions.

SLOVENSKI STANDARD
01-januar-2005
6WRULWYHLQSURWRNROL]DQDSUHGQDRPUHåMD63$1±.RGLUQHWRþNH]D9LQ
L]SHOMDQHSURWRNROH
Services and Protocols for Advanced Networks (SPAN); Codepoints for V5 and derived
protocols
Ta slovenski standard je istoveten z: TS 101 773 Version 1.2.1
ICS:
33.040.35 Telefonska omrežja Telephone networks
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

Technical Specification
Services and Protocols for Advanced Networks (SPAN);
Codepoints for V5 and derived protocols

2 ETSI TS 101 773 V1.2.1 (2002-08)

Reference
RTS/SPAN-130310
Keywords
NMDS, VB5 interface, V5 interface
ETSI
650 Route des Lucioles
F-06921 Sophia Antipolis Cedex - FRANCE

Tel.: [phone]  Fax: [phone]

Siret N° 348 623 562 00017 - NAF 742 C
Association à but non lucratif enregistrée à la
Sous-Préfecture de Grasse (06) N° 7803/88

Important notice
Individual copies of the present document can be downloaded from:
http://www.etsi.org
The present document may be made available in more than one electronic version or in print. In any case of existing or
perceived difference in contents between such versions, the reference version is the Portable Document Format (PDF).
In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive
within ETSI Secretariat.
Users of the present document should be aware that the document may be subject to revision or change of status.
Information on the current status of this and other ETSI documents is available at
http://portal.etsi.org/tb/status/status.asp
If you find errors in the present document, send your comment to:
[e-mail]
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 2002.
All rights reserved.
TM TM TM
DECT , PLUGTESTS and UMTS are Trade Marks of ETSI registered for the benefit of its Members.
TM
TIPHON and the TIPHON logo are Trade Marks currently being registered by ETSI for the benefit of its Members.
TM
3GPP is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners.
ETSI
3 ETSI TS 101 773 V1.2.1 (2002-08)
Contents
Intellectual Property Rights.4
Foreword.4
Introduction .4
1 Scope.5
2 References.5
3 Abbreviations.5
4 Message type codepoints.6
4.1 Guidance rules.6
4.2 Currently defined codepoints .6
5 Information element identifier codepoints .7
5.1 Guidance rules.7
5.2 Currently defined codepoints .8
6 Information element codepoints reserved to bodies other than ETSI .9
6.1 Introduction.9
6.2 Control function element information element.9
History .10

ETSI
4 ETSI TS 101 773 V1.2.1 (2002-08)
Intellectual Property Rights
IPRs essential or potentially essential to the present document may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
server (http://webapp.etsi.org/IPR/home.asp).
Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web
server) which are, or may be, or may become, essential to the present document.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Services and Protocols for
Advanced Networks (SPAN).
Introduction
The narrowband V5.x interface signalling protocol standards were the original documents which defined a set of
message and information element codepoints. Subsequently other standards have re-used and extended the set. The
present document contains a consolidated list of the superset of message and information element codepoints. Its
purpose is to maintain the current styles and make allocating new unique codepoints easier. It was for this reason that
the work was initiated by the ETSI Technical Working Group SPAN.
ETSI
5 ETSI TS 101 773 V1.2.1 (2002-08)
1 Scope
The present document specifies the codepoints for messages and information elements used in V5 based standards. It is
the ETSI master list and as such its purpose is to avoid duplication and aid in the correct allocation of new codepoints.
The present document is initially applicable to V5.1 [1], V5.2 [2], NMDS [3] and the ATM Forum LES using
AAL2 [4].
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
• References are either specific (identified by date of publication and/or edition number or version number) or
non-specific.
• For a specific reference, subsequent revisions do not apply.
• For a non-specific reference, the latest version applies.
[1] ETSI EN 300 324-1 (V1.2.3): "V interfaces at the digital Local Exchange (LE); V5.1 interface for
the support of Access Network (AN); Part 1: V5.1 interface specification".
[2] ETSI EN 300 347-1: "V interfaces at the digital Local Exchange (LE); V5.2 interface for the
support of Access Network (AN); Part 1: V5.2 interface specification".
[3] ETSI EN 301 141: "Integrated Services Digital Network (ISDN); Narrowband Multi-service
Delivery System (NMDS)".
[4] af-vmoa-0145 (2002): "Voice and Multimedia Over ATM - Loop Emulation Service Using
AAL2".
[5] ETSI TS 100 347 (V1.1.1): "Services and Protocols for Advanced Networks (SPAN); V5.2
interface for the support of Access Network (AN); Release notes for V5.2".
3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AAL2 ATM Adaption Layer number 2
AN Access Network
ATM Asynchronous Transfer Mode
BCC Bearer Channel Control
CID Channel IDentifier
ISDN Integrated Services Digital Network
LE Local Exchan
...