Release ledger
Canonical Atlas record
TR 26.980
Multimedia telephony over IP Multimedia Subsystem (IMS); Media handling aspects of multi-stream multiparty conferencing for Multimedia Telephony Service for IMS (MTSI)
Responsible WGS4
StatusUnder change control
Initial releaseRel-13
Selected releaseRel-14
Latest indexed version19.0.0
Series26
TypeTR
Release evolution
Compare evidence between releases
Use indexed version, Work Item and Change Request evidence to see what changed around this specification. This is an evidence trail, not a clause-by-clause normative diff.
Rel-14 snapshot
Work affecting this release
21 indexed Change Requests · 0 connected Work Items.
Showing 12 CR records from the available cross-release sample. Browse release CR records (JSON) →
CR 0004 rev.2 — CR 26.980-0004 rev 2 Correction to Compact Concurrent Codec Capabilities SDP ABNF (Rel-14)
CR 0005 — Compact CCC SDP for MMCMH Session Initiation
CR 0005 rev.1 — CR 26.980-0005 rev 1 Compact Concurrent Codec Capabilities SDP Usage for MMCMH Session Initiation (Rel-14)
CR 0001 — Addition of codec migration use case
CR 0002 — CR 26.980-xxxx Querying and Exchanging Codec Capabilities for MMCMH (Rel-14)
CR 0002 rev.1 — CR 26.980-0002 rev 1 Querying and Exchanging Codec Capabilities for MMCMH (Rel-14)
CR 0002 rev.2 — CR 26.980-0002 rev 2 Querying and Exchanging Codec Capabilities for MMCMH (Rel-14)
CR 0003 — CR 26.980-YYYY Compact CCC SDP Attribute (Rel-14)
CR 0003 rev.1 — CR 26.980-0003 rev 1 Compact CCC SDP Attribute (Rel-14)
CR 0003 rev.2 — CR 26.980-0003 rev 2 Compact CCC SDP Attribute (Rel-14)
CR 0004 — Correction to Compact Concurrent Codec Capabilities SDP ABNF
CR 0004 rev.1 — CR 26.980-0004 rev 1 Correction to Compact Concurrent Codec Capabilities SDP ABNF (Rel-14)
Version history
Indexed versions
Showing 11 of 11 indexed versions.
19.0.0Rel-19SA#1092025-10-24
18.0.0Rel-18SA#1032024-05-15
17.0.0Rel-17SA#95-e2022-04-07
16.0.0Rel-16SA#88-e2020-07-21
15.0.0Rel-15SA#802018-06-22
14.2.0Rel-14SA#752017-03-17
14.1.0Rel-14SA#742016-12-16
14.0.0Rel-14SA#732016-09-30
13.0.0Rel-13SA#702015-12-21
1.0.1Rel-13 · pre-approvalSA#702015-12-17
1.0.0Rel-13 · pre-approvalSA#702015-12-10
Atlas classifications
Meaning and provenance
No Atlas classifications have been attached yet.
Work Items
Standards work connected to TR 26.980
MMCMH
Rel-13historical linkMTSI Extension on Multi-stream Multiparty
Historical association · verification pendingKnowledge graph
Related standards
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