| Call intrusion supplementary service for H.323 |
 |
This Supplementary Service describes the procedures and the signalling protocol for the Call Intrusion supplementary service in H.323 (Packet Based Multimedia Communications Systems) networks.
The Call Intrusion supplementary service (SS-CI) enables a calling user A, encountering a busy destination user B, to establish communication with user B by breaking into an established call between user B and a third user C.
This Recommendation makes use of the "Generic functional protocol for the support of supplementary services in H.323" as defined in ITU-T H.450.1.
This Recommendation requires H.323 version 2 (1998) or later. Version 2 products can be identified by H.225.0 messages containing a protocolIdentifier= {itu-t (0) recommendation (0) h (8) 2250 version (0) 2} and H.245 messages containing a protocolIdentifier= {itu-t (0) recommendation (0) h (8) 245 version (0) x}, where "x" is 3 or higher.
The procedures and the signalling protocol of this Recommendation are derived from the Call Intrusion supplementary service specified in ISO/IEC 14845 and ISO/IEC 14846. |
|
| Citation: |
https://handle.itu.int/11.1002/1000/5422 |
| Series title: |
H series: Audiovisual and multimedia systems
H.200-H.499: Infrastructure of audiovisual services
H.450-H.499: Supplementary services for multimedia |
| Approval date: |
2001-03-01 |
| Approval process: | AAP |
|
Status: |
In force |
|
Maintenance responsibility: |
ITU-T Study Group 21 |
|
Further details: |
Patent statement(s)
Development history
|
|
|
| Ed. |
ITU-T Recommendation |
Status |
Summary |
Table of Contents |
Download |
|
1
|
H.450.11 (03/2001)
|
In force
|
here
|
here
|
here
|
|
|
|
ITU-T Supplement
|
Title
|
Status
|
Summary
|
Table of contents
|
Download
|
|
H Suppl. 6 (04/2006)
|
Control load quantum for decomposed gateways
|
In force
|
here
|
here
|
here
|
|
H Suppl. 9 (05/2008)
|
Gateway control protocol: Operation of H.248 with H.225.0, SIP, and ISUP in support of emergency telecommunications service (ETS)/international emergency preference scheme (IEPS)
|
In force
|
here
|
here
|
here
|
|
H Suppl. 11 (02/2009)
|
Analysis of class-based home network QoS solutions
|
In force
|
here
|
here
|
here
|
|
H Suppl. 12 (11/2013)
|
Gateway control protocol: Priority traffic treatment by ITU-T H.248 gateways
|
In force
|
here
|
here
|
here
|
|
H Suppl. 13 (10/2015)
|
Gateway control protocol: Common ITU-T H.248 terminology - Release 2
|
In force
|
here
|
here
|
here
|
|
H Suppl. 14 (10/2015)
|
Gateway control protocol: SDP codepoints for gateway control - Release 2
|
In force
|
here
|
here
|
here
|
|
H Suppl. 15 (01/2017)
|
Conversion and coding practices for HDR/WCG Y'CbCr 4:2:0 video with PQ transfer characteristics
|
In force
|
here
|
here
|
here
|
|
H Suppl. 17 (11/2014)
|
Guide for addressing accessibility in standards
|
In force
|
here
|
here
|
here
|
|
H Suppl. 18 (10/2017)
|
Signalling, backward compatibility and display adaptation for HDR/WCG video coding
|
In force
|
here
|
here
|
here
|
|
H Suppl. 19 (04/2021)
|
Usage of video signal type code points
|
In force
|
here
|
here
|
here
|
|
H Suppl. 21 (01/2025)
|
Film grain synthesis technology for video applications
|
In force
|
here
|
-
|
here
|
|
Click
here
to download all the modules of this Recommendation (zipped archive)
|
|
Click here to download all the modules needed to compile this Recommendation (zipped archive)
|
| Title |
Approved on |
Download |
|
Testing of personal audio systems for compliance with ITU-T H.870 (2018)
|
2024
|
here
|
|
Testing of personal audio systems for compliance with ITU-T H.870 (2018)
|
2021
|
here
|
|
Telecommunications Accessibility Checklist
|
2006
|
here
|
|
