SS7 MTP-L3 and M3UA IETF ETSI 2003

1	GENERAL
1.1	Introduction
1.2	Concept
2	Compliance Lists
2.1	ETS 300 008-1
2.2	EN 301 004-1
2.3	ITU-T Q.701
2.4	ITU-T Q.704
2.5	ITU-T Q.705
2.6	ITU-T Q.707
2.7	ITU-T Q.2210
3	Notes and Comments
Glossary
Reference List

1 GENERAL

1.1 Introduction

This document details how the Ericsson SS7 MTPL3& M3UA IETF signaling component conforms with the ETSI standards Reference [1] and Reference [2].

Since the ETSI standards frequently references the ITU-standards Reference [3], Reference [4], Reference [5], and Reference [6], this document also shows how the Ericsson SS7 MTPL3& M3UA IETF signaling component conforms with these standards.

1.2 Concept

The terms that are used are:

C		The Ericsson signaling component complies with the specified section in the standard.

N		The Ericsson signaling component does not comply with the specified section in the standard.

P		The Ericsson signaling component complies partly with the specified section in the standard.

-		There is nothing to implement in the referred section (always placed in column C).

2 Compliance Lists

2.1 ETS 300 008-1

Table 1
References	C	Comments
Intellectual Property Rights	-
Foreword	-
Endorsement notice	-
1. Scope	-
2. References	-
3. Abbreviations	-
4. Modifications to ITU-T Recommendations Q.701 to Q.708	-
4.1 National options	X
4.2 Signaling data links	X
4.3 Network Indicator	X
5. Modifications to ITU-T Recommendation Q.701	X	General compliance to ITU-T Q.704 is described in Section 2.3
6. Modifications to ITU-T Recommendation Q.703	-
7. Modifications to ITU-T Recommendation Q.704	-	GeneXal compliance to ITU-T Q.704 is described in Section 2.4
7.1 Signaling link management	X
7.2 Subclause 14.2.1	X
7.3 Table 1/Q.704	X
7.4 Subclause 15.17.4	X
7.5 SDL changes	X
8. Modifications to ITU-T Recommendation Q.705	X	General compliance to ITU-T Q.705 is described in Section 2.5
9. Modifications to ITU-T Recommendation Q.706	-
Annex ZA (normative): Specific requirements	-
ZA.1 Signaling link loading	-
ZA.1.1 Basic definition	-
ZA.1.2 Maximum signaling link load during normal operation	-
ZA.1.3 Minimum signaling link load handling capability	-
ZA.1.4 Message length influence	-
ZA.1.5 Graphic representation	-
Bibliography	-
History	-

2.2 EN 301 004-1

Table 2
References	C	N	P	Comments
Clause 1	-
Clause 2	-
Clause 3	X
Annex ZA (normative): Additional Requirements	-
Annex ZB (informative): Applicability	-

2.3 ITU-T Q.701

Table 3
References	C	N	P	Comments
1. Introduction	-
2. Signaling system structure	-
3. Message Transfer Part and the signaling network	-
3.1 General	-
3.1.1 Signaling network components			X	Note 1 on note1
3.1.2 Signaling modes	X
3.1.3 Signaling point modes	X
3.1.4 Message labelling	X
3.2 Signaling message handling functions	X
3.3 Signaling network management functions	X
3.4 Testing and maintenance functions	X
3.5 Use of signaling network	X
4 Message transfer capability	X
5 Differences from Blue Book	-			See Section 2.4
6 Compatibility in the Message Transfer Part	X
7 Interworking of yellow, red and blue MTP implementation	-
7.1 Yellow Book to Red Book interworking		X
7.1.1 Level 2 flow control		X
7.1.2 Transfer restricted and Transfer controlled procedures		X
7.1.3 Transfer allowed/Transfer prohibited acknowledgments		X
7.1.4 Management inhibiting procedure		X
7.2 Red Book to Blue Book interworking	-
7.2.1 Signaling Point Restart		X
7.2.2 Q.703 and Q.704 timer values	X
7.2.3 User flow control	X
7.2.4 Management inhibit test procedure		X
7.2.5 SIF length increase		X
7.2.6 SIF length increase (National networks option)		X
7.2.7 Processor outage		X
7.3 Yellow Book to Blue Book interworking		X
7.4 Blue Book to the present version interworking	X
7.5 Red Book to the present version interworking	X
8 Primitives and parameters of the Message Transfer Part	X

2.4 ITU-T Q.704

Table 4
References	C	N	P	Comments
1 Introduction	-
1.1 General characteristics of the signaling network functions	X
1.2 Signaling message handling	X
1.3 Signaling network management			X	Note 2 on note2
2 Signaling message handling	X
3 Signaling network management	-
3.1 General			X	Note 2 on note2
3.2 Status of signaling links	X
3.3 Procedures used in connection with link status changes	-
3.3.1 Signaling link failed	X
3.3.2 Signaling link restored	X
3.3.3 Signaling link deactivated	X
3.3.4 Signaling link activated	X
3.3.5 Signaling link blocked			X	Note 6 on note6
3.3.6 Signaling link unblocked	X
3.3.7 Signaling link inhibited	X
3.3.8 Signaling link uninhibited	X
3.4 Status of signaling routes	X
3.5 Procedures used in connection with route status changes	X
3.6 Status of signaling points	X
3.7 Procedures used in connection with point status changes	X
3.8 Signaling network congestion	X
4 Signaling traffic management	-
4.1 General	-
4.2 Normal routing situation	X			Note 7 on note7
4.3 Signaling link unavailability	X
4.4 Signaling link availability	X
4.5 Signaling route unavailability	X
4.6 Signaling route availability	X
4.7 Signaling route restriction	X
4.8 Signaling point availability	X
5 Changeover	-
5.1 General	X
5.2 Network configurations for changeover	X
5.3 Changeover initiation and actions	X
5.4 Buffer updating procedure	X
5.5 Retrieval and diversion of traffic	X
5.6 Emergency changeover procedures			X	Note 4 on note4
5.7 Procedures in abnormal conditions	X
6 Changeback	X
7 Forced rerouting	X
8 Controlled rerouting initiation and actions	X
9 MTP restart	X			Note 8 on note13
10 Management inhibiting	X
11 Signaling traffic flow control	X
12 Signaling link management	-
12.1 General			X	Note 2 on note2
12.2 Basic signaling link management procedures	X
12.3 Signaling link management procedures based on automatic allocation of signaling terminals		X
12.4 Signaling link management procedures based on automatic allocation of signaling data links		X
12.5 Automatic allocation of signaling terminals		X
12.6 Automatic allocation of signaling data links		X
12.7 Different signaling link management procedures at the two ends of a link set	X
13 Signaling route management	-
13.1 General	X
13.2 Transfer prohibited	X
13.3 Transfer-allowed	X
13.4 Transfer-restricted (National option)			X	Note 3 on note3
13.5 Signaling-route-set-test	X
13.6 Transfer-controlled (International network)	X
13.7 Transfer-controlled (National option with congestion priorities)	X
13.8 Transfer-controlled (National option without congestion priorities)	X
13.9 Signaling-route-set-congestion-test (National Option)	X
14 Common characteristics of message signal unit formats	X
15 Format and codes of signaling network management messages	-
15.1 General	X
15.2 Label	X
15.3 Heading code (H0)	X
15.4 Changeover message	X
15.5 Changeback message	X
15.6 Emergency changeover message	X
15.7 Transfer-prohibited message	X
15.8 Transfer-allowed message	X
15.9 Transfer-restricted message (national option)	X
15.10 Signaling-route-set-test message	X
15.11 Management inhibit message	X
15.12 Traffic restart allowed message	X
15.13 Signaling-data-link-connection-order message		X
15.14 Signaling-data-link-connection-acknowledgement message		X
15.15 Transfer-controlled message	X
15.16 Signaling-route-set-congestion-test message (national option)	X
15.17 User Part unavailable message	X
16 Static transition diagrams, abbreviations and timers	-
16.1 General	-
16.2 Drafting conventions	-
16.3 Signaling message handling	-
16.4 Signaling traffic management	-
16.5 Signaling link management	-
16.6 Signaling route management	-
16.7 Abbreviations used in Figures 23 onwards	-
16.8 Timers and timer values			X	Note 5 on note5

2.5 ITU-T Q.705

Table 5
Reference	C	N	P	Comments
1. Introduction	-
2. Network components	X
3. Structural independence of international and national signaling networks	X
4. Consideration common to both international and national signaling networks	-
4.1 Availability of the network	X
4.2 Message transfer delay	X
4.3 Message sequence control	X
4.4 Number of signaling links used in load sharing	X
4.5 Satellite working			X	Note 5 on note5
5. International signaling network	X
6. Signaling network for cross-border traffic	-
6.1 General	X
6.2 Use of international hierarchical level	-
6.2.1	X
6.2.2		X		Note 9 on note14
6.2.3	X
6.2.4	-
6.3 Integrated numbering of national signaling networks	-
6.4 Interworking of national signaling networks	-
7. National signaling network	-
8. Procedures prevent unauthorized use of an STP (optional)	-
8.1 General	-
8.2 Identifying unauthorized SS No. 7 messages	X			Note 10 on note15
8.3 Treatment of unauthorized SS No. 7 messages			X	Note 11 on note16
8.4 Measurements			X	Note 12 on note17
8.5 Notification to unauthorized user			X	Note 13 on note18
9. SS No. 7 Planning Tools	-
A.1. General	X
A.2. Basic network structure (example)	X
A.3. Routing	X
A.4. Action relating to failure conditions	X
A.5. Explanatory note from the implementors forum for clarification of load sharing	X

2.6 ITU-T Q.707

Table 6
References	C	N	P	Comments
1 General	-
2 Testing	X
3 Fault location	-
4 Signaling network monitoring	-
5 Formats and codes of signaling network testing and maintenance messages	X
6 State transition diagrams	X

2.7 ITU-T Q.2210

Ericsson SS7 MTP-L3 M3UA IETF is compliant with ITU-T Q.2210 except for the deviations from ITU-T Q.704 (see Section 2.4).

3 Notes and Comments

Note 1		Link groups not supported.

Note 2		Automatic allocation or reconfiguration of signaling equipment is not supported.

Note 3		This module never initiates sending of TFR. However, an incoming TFR may lead to TFRs being broadcasted.

Note 4		No difference between long- and short-term processor outage. All emergency changeovers are treated as being initiated by a long-term processor outage.

Note 5		The following timers are not implemented: T7, T9, T11, T24.

Note 6		Timer T24 not used. Signaling traffic management commences without interruptions.

Note 7		Priorities are not set on a per linkset basis, instead priorities are set on routes in routesets.

Note 8		Blue book restart is supported according to Q.704 (1988).

Note 9		A signaling point is able to be involved in signaling of both national and international traffic. However, a signaling point is not able to relay traffic in between a national and international network.

Note 10		Standard compliant behavior is a configurable option. M3-IETF will be considered fully compliant with chapter 8.2 iii) that is inhibit/allow STP access by examination of OPC and DPC combination in the incoming STP message, if the feature ”Forbid messages from unknown DPC” is enabled. Point 8.2 ii) is not applicable as according to the latest version of ETS 300 008-1, v. 1.3.2, 2003 Point 8.2 ii) shall not apply.

Note 11		OPC and DPC combination in the incoming STP message. An STP is only able to discard unauthorized SS7 messages on a SPC basis, not on a per linkset basis. Furthermore, STPs only permit discard of all unauthorized SS7 messages or all STP messages outside designated ranges (see Section 8.2 in Reference [7] and Note 15 on note15).

Note 12		Only monitoring of unauthorized messages on a SPC basis is supported.

Note 13		Restriction of the number of violation reports is not supported.

Glossary

DPC

Destination Point Code

ISDN

Integrated Services Digital Network

ISDN-UP

ISDN User Part

M3-IETF

MTPL3&M3UA IETF

MSU

Message Signal Unit

MTP

Message Transfer Part

OPC

Originating Point Code

SCCP

Signaling Connection Control Part

SIF

Signaling Information Field

SIO

Service Information Octet

Signaling Link

SPC

Signaling Point Code

STP

Signaling Transfer Point

Transaction Capability

TFA

Transfer Allowed

TFC

Transfer Controlled

Reference List

ETSI standards
[1] ETS 300 008-1, ISDN SS7 MTP to support international interconnection, V1.3.2, June 2003
[2] EN 301 004-1, B-ISDN SS7 MTP-L3 to support international interconnection, V1.1.3, 1998-02

ITU standards
[3] ITU-T Recommendation Q.701 Functional Description of the Message Transfer Part (MT) of Signaling System No. 7, 03/93
[4] ITU-T Recommendation Q.704 Signaling System No. 7 - Signaling Network Functions and Messages, 07/96
[5] ITU-T Recommendation Q.707 Testing and Maintenance, 11/88
[6] ITU-T Recommendation Q.2210 MTP level 3 functions and messages using the services of ITU-T recommendation Q.2140, 07/96
[7] ITU-T Recommendation Q.705 Signaling System No. 7 - Signaling Network Structure, 03/93

Copyright	© Ericsson AB 2008, 2011, 2013. All rights reserved. No part of this document may be reproduced in any form without the written permission of the copyright owner.
Disclaimer	The contents of this document are subject to revision without notice due to continued progress in methodology, design and manufacturing. Ericsson shall have no liability for any error or damage of any kind resulting from the use of this document.