Release ledger
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-7 snapshot
Work affecting this release
4 indexed Change Requests · 5 connected Work Items.
Showing 0 CR records from the available cross-release sample. Browse release CR records (JSON) →
Version history
Indexed versions
Showing 60 of 72 indexed versions.
Atlas classifications
Meaning and provenance
No Atlas classifications have been attached yet.
Work Items
Standards work connected to TS 23.009
Codec Negotiation between UE and MSC
(Small) Technical Enhancements and Improvements for Rel-4
Transcoder-Free Operation
Out-of-Band Transcoder Control solution
Handling of early Ues
UTRAN Sharing in Connected Mode
FS SRNS Relocation Procedure Enhancement
(Small) Technical Enhancements and Improvements for Rel-5
Rel-5 Terminal interfaces
Switching between voice and video call - Redial solution
Flexible Layer One for GERAN
(Small) Technical Enhancements and Improvements for Rel-6
Stage 3 for Voice Call Continuity between CS and IMS (incl. I-WLAN)
Mp (MRFC - MRFP) interface
(Small) Technical Enhancements and Improvements for Rel-7
Voice Call Continuity between CS and IMS (incl. I-WLAN)
CT4 aspects of Stage 3 for Voice Call Continuity between CS and IMS (incl. I-WLAN)
AoIP (A-interface over IP)
CT1 part of Core Network Impacts for A-Interface User Plane over IP
Core Network Impacts for A-Interface User Plane over IP
Study on 3GPP System Architecture Evolution
Enhancements for Serving Radio Network Subsystem (SRNS) Relocation Procedure
3GPP System Architecture Evolution Specification - Evolved Packet System (non RAN aspects)
Single Radio Voice Call Continuity for 3GPP (SRVCC)
Stage 3 for SRVCC in EPS
Rel-9 RAN improvements
(Small) Technical Enhancements and Improvements for Rel-9
Stage 2/3 for CN aspects of Local Call Local Switch
Deleted - CT1 aspects of Local Call Local Switch
(Small) Technical Enhancements and Improvements for Rel-10
(Small) Technical Enhancements and Improvements for Rel-11
CT1 part for Single Radio Voice Call Continuity from UTRAN/GERAN to E-UTRAN/HSPA
GSM/UMTS interworking
Handover
Lawful Interception for GSM Features transposed to UMTS
MultiCall
Out-of-Band Transcoder
Out-of-Band Transcoder Control
(Small) Technical Enhancements and Improvements for R99
Knowledge graph
Related standards
No graph edges indexed yet. The graph API is available at this JSON endpoint.