INTERNATIONAL TELECOMMUNICATION UNION
COM 11-R 211-E
February 2000
Original: English
TELECOMMUNICATION
STANDARDIZATION SECTOR
STUDY PERIOD 1997 - 2000
Question: 16/11
Texte disponible seulement en 

Text available only in
E
Texto disponible solamente en 

STUDY GROUP 11 - REPORT R 211
SOURCE*:
STUDY GROUP 11
TITLE:
IMPLEMENTORS' GUIDE (12/99) FOR RECOMMENDATION Q.2210 (07/96)
________
Summary
This document contains the revised version of the Implementors’ Guide which was originally
published as version (03/99).
* Contact:
Michael A. McGrew,
Lucent Technologies
SG11\REPORT\R211E.WW9
(102332)
Tel: +1 614 860 3585
Fax: +1 614 868 3998
E-mail: mmcgrew@lucent.com
10.02.00
-2COM 11-R 211-E
1
Introduction
1.1
References
[1]
ITU-T Recommendation Q.2210 (07/96), Message Transfer Part Level 3 Functions and
Messages using the services of ITU-T Recommendation Q.2140.
[2]
ITU-T Recommendation Q.2150, AAL Type 2 Signalling Transport Converter on
Broadband MTP.
[3]
ITU-T Recommendation Q.1901, Bearer Independent Call Control.
[4]
ITU-T Recommendation H.248, Media Gateway Control Protocol.
1.2
Background
This document is a compilation of two minor upgrades to the 1996 edition of ITU-T
Recommendation Q.2210. New text is double underlined and deleted text is shown strikethrough.
1)
The revised SDLs were agreed in the May 1998 meeting. Also, the new text for
section I.3.3.2 is necessary to align with the SDL revisions.
2)
Revise the applicable User Parts. These changes affect two sections of Q.2210,
• 9.5
Service Indicator Values
• 9.8.2 User Part Unavailable messages
Q.2210 does not track all the SI values in Q.704. The only SI values included are those for
broadband; therefore, the SI value regarding satellite ISDN User Part is deleted from Q.2210.
The guide is intended to be an additional authoritative source of information for implementors to be
read in conjunction with the Recommendation itself.
1.3
Scope of the guide
This guide records minor enhancements to the Recommendation in the following categories:
•
deployment possibility in new environments;
•
corrections of misalignment between text and figures.
1.4
Contacts
Rapporteur Q.16/11:
(MTP Part)
1.5
Michael McGrew
Lucent Technologies
6200 East Broad Street
Columbus, Ohio 43213
United States
Tel.: +1 614 860 3585
Fax: +1 614 868 3998
Email: mmcgrew@lucent.com
Document History
Version
Summary
03/1999
New Implementors' Guide
12/1999
Add new User Part Code values 13 and 14 and reserve value 15 for
extension
SG11\REPORT\R211E.WW9
(102332)
10.02.00
-3COM 11-R 211-E
2
Changes in Q.2210 User Parts as defined in Q.704 (3/93)
9.5
Service indicator
The following codes of the service indicator are additionally used:
Bits
9.8.2
D
C
B
A
1
0
0
1
Broadband ISDN User Part
1
1
0
0
AAL type 2 Signalling Transport Converter
on Broadband MTP
1
1
0
1
Bearer Independent Call Control (Q.1901)
1
1
1
0
Gateway Control Protocol (H.248)
1
1
1
1
Reserved for extension
User part unavailable message
The user part identity field within the user part unavailable message can additionally include the
following codes:
Bits
3
D
C
B
A
1
0
0
1
Broadband ISDN User Part
1
1
0
0
AAL type 2 Signalling Transport Converter
on Broadband MTP
1
1
0
1
Bearer Independent Call Control (Q.1901)
1
1
1
0
Gateway Control Protocol (H.248)
1
1
1
1
Reserved for extension
Modified text and figures in Appendix I
I.3.3.2 State transition diagrams
The MTP-3 user which wants to use MTP-3 services shall support the abstract upper MTP-3
boundary which includes the repertoire of MTP-primitives, and the layer interactions at a signalling
point-to-point MTP connection endpoint specified in this subclause.
The state transition diagram, as seen by the MTP User, is shown in Figure I-4/Q.2210. One
individual state transition diagram exists per MTP-3 connection, which is conceptually identified by
a Connection Endpoint Suffix with the identifier "OPC/DPC". Associated with each MTP-3
connection is one signalling relation.
This section defines the constraints on the sequences in which the primitives may occur. The
sequences are related to the states at one MTP connection endpoint and apply to the method of
congestion control indicated in the title of the Figure I-4/Q.2210.
The following states are defined:
State 1
MTP signalling relation not initialized
SG11\REPORT\R211E.WW9
(102332)
10.02.00
-4COM 11-R 211-E
State 2
MTP signalling relation available
State 3
MTP signalling relation unavailable
State 4
MTP signalling relation congested
Failure
(NOTE 2)
MTP-RESUME.indication
MTP signalling relation
available
2
MTP-RESUME
.indication
MTP-PAUSE.indication
MTP-PAUSE.indication (NOTE 2)
Failure
MTP signalling relation
not initialized
1
MTP signalling relation
unavailable
3
MTP-TRANSFER.request
MTP-TRANSFER.indication
MTP-STATUS.indication
(for a remote unavailable MTP user
or to indicate MTP congestion) (NOTE 3)
MTP-TRANSFER.indication (NOTE 1)
MTP-STATUS.indication (for a remote unavailable MTP user or to indicate MTP congestion)
NOTE 1 – MTP-TRANSFER.indication in state 3 is a result of the availability of the signalling relation towards the local
MTP, but the unavailability of the signalling relation towards the remote MTP.
NOTE 2 – These transitions are implicity triggered by the MTP restart procedure.
NOTE 3 – The MTP itself does not keep track of the status of the remote MTP users, so that each user is responsible for
detecting the availability of its remote peer.
FIGURE I.4/Q.2210 (part 1 of 3)
State transition diagram for sequence of MTP-primitives for one MTP signalling relation
for the international method of congestion reporting
SG11\REPORT\R211E.WW9
(102332)
10.02.00
-5COM 11-R 211-E
Failure
(NOTE 2)
MTP-RESUME.indication
MTP signalling relation
available
2
MTP-RESUME
.indication
MTP-PAUSE.indication
MTP-PAUSE.indication (NOTE 2)
Failure
MTP signalling relation
not initialized
1
MTP signalling relation
unavailable
3
MTP-TRANSFER.request
MTP-TRANSFER.indication
MTP-STATUS.indication
(for a remote unavailable MTP user
or to indicate MTP congestion + level) (NOTE 3)
MTP-TRANSFER.indication (NOTE 1)
MTP-STATUS.indication (for a remote unavailable MTP user or to indicate MTP congestion + level)
NOTE 1 – MTP-TRANSFER.indication in state 3 is a result of the availability of the signalling relation
towards the local MTP, but the unavailability of the signalling relation towards the remote MTP.
NOTE 2 – These transitions are implicity triggered by the MTP restart procedure.
NOTE 3 – The MTP itself does not keep track of the status of the remote MTP users, so that each user is
responsible for detecting the availability of its remote peer.
FIGURE I.4/Q.2210 (part 2 of 3)
State transition diagram for sequence of MTP-primitives for one MTP signalling relation
(multiple congestion levels without congestion priorities)
SG11\REPORT\R211E.WW9
(102332)
10.02.00
-6COM 11-R 211-E
Failure
Failure
(NOTE 2)
MTP-RESUME.indication
MTP signalling relation
available
2
MTP-STATUS.indication,
level = 0
MTP-STATUS.indication,
level 
MTP-RESUME
.indication
MTP-PAUSE.indication
MTP-PAUSE.indication (NOTE 2)
Failure
MTP signalling relation
not initialized
1
MTP-TRANSFER.request
MTP-TRANSFER.indication
MTP-STATUS.indication
(for a remote unavailable MTP user)
(NOTE 3)
MTP signalling relation
unavailable
3
MTP-PAUSE.indication
MTP-TRANSFER.indication (NOTE 1)
MTP-STATUS.indication (for a remote
unavailable MTP user or to indicate
MTP congestion level 0)
MTP signalling relation
congested
4
MTP-TRANSFER.request
MTP-TRANSFER.indication
MTP-STATUS.indication (for a remote unavailable
MTP user or MTP congestion level 0) (NOTE 4)
NOTE 1 – MTP-TRANSFER.indication in state 3 is a result of the availability of the signalling relation towards the local MTP,
but the unavailability of the signalling relation towards the remote MTP.
NOTE 2 – These transitions are implicity triggered by the MTP restart procedure.
NOTE 3 – The MTP itself does not keep track of the status of the remote MTP users, so that each MTP user is responsible for
detecting the availability of its remote peer.
NOTE 4 – Further study is required to take into account the MTP level congestion procedure into the MTP user’s congestion
procedures.
FIGURE I.4/Q.2210 (part 3 of 3)
State transition diagram for sequence of MTP-primitives for one MTP signalling relation
(multiple congestion levels with congestion priorities)
_____________________
SG11\REPORT\R211E.WW9
(102332)
10.02.00