Release Rel-15
5G NRThe foundational 5G New Radio release, defining the NR air interface and 5G core.
Frozen 2018-06-14137 specifications in series 26
Key features: First 5G NR specifications, NSA and SA architectures
All SeriesSeries 21Series 22Series 23Series 24Series 26Series 27Series 28Series 29Series 31Series 32Series 33Series 34Series 35Series 36Series 37Series 38
TS 26.231
Cellular text telephone modem; Minimum performance requirements
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.233
Transparent end-to-end Packet-switched Streaming service (PSS); General description
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.234
Transparent end-to-end Packet-switched Streaming Service (PSS); Protocols and codecs
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.237
IP Multimedia Subsystem (IMS) based Packet Switch Streaming (PSS) and Multimedia Broadcast/Multicast Service (MBMS) User Service; Protocols
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.238
Uplink streaming
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.243
ANSI-C code for the fixed-point distributed speech recognition extended advanced front-end
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.244
Transparent end-to-end packet switched streaming service (PSS); 3GPP file format (3GP)
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.245
Transparent end-to-end Packet switched Streaming Service (PSS); Timed text format
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.246
Transparent end-to-end Packet-switched Streaming Service (PSS); 3GPP SMIL language profile
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.247
Transparent end-to-end Packet-switched Streaming Service (PSS); Progressive Download and Dynamic Adaptive Streaming over HTTP (3GP-DASH)
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.259
Subjective test methodologies for the evaluation of immersive audio systems
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.260
Objective test methodologies for the evaluation of immersive audio systems
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.267
eCall data transfer; In-band modem solution; General description
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.268
eCall data transfer; In-band modem solution; ANSI-C reference code
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.269
eCall data transfer; In-band modem solution; Conformance testing
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.273
ANSI-C code for the fixed-point Extended Adaptive Multi-Rate - Wideband (AMR-WB+) speech codec
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.274
Audio codec processing functions; Extended Adaptive Multi-Rate - Wideband (AMR-WB+) speech codec; Conformance testing
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.281
Mission Critical Video (MCVideo); Codecs and media handling
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.290
Audio codec processing functions; Extended Adaptive Multi-Rate - Wideband (AMR-WB+) codec; Transcoding functions
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26
TS 26.304
Extended Adaptive Multi-Rate - Wideband (AMR-WB+) codec; Floating-point ANSI-C code
Codecs & Media
Rel-15TSCodecs & MediaUpdated 2026-07-26