TS 26.226 – Cellular Text Telephone Modem (CTM)
3GPP TS 26.226 is the 3GPP Technical Specification for Cellular Text Telephone Modem (CTM). It is published in 12 releases (Rel-8 to Rel-19); the latest version is 19.0.0 in Rel-19.
Specifies CTM for reliable text transmission over cellular speech channels, enabling text telephony for emergency calls and accessibility.
Releases and versions of TS 26.226
| Release | Latest version | Links |
|---|---|---|
| Rel-19 | 19.0.0 | Read · Download (3GPP) |
| Rel-18 | 18.0.0 | Read · Download (3GPP) |
| Rel-17 | 17.0.0 | Read · Download (3GPP) |
| Rel-16 | 16.0.0 | Read · Download (3GPP) |
| Rel-15 | 15.0.0 | Read · Download (3GPP) |
| Rel-14 | 14.0.0 | Read · Download (3GPP) |
| Rel-13 | 13.0.0 | Read · Download (3GPP) |
| Rel-12 | 12.0.0 | Read · Download (3GPP) |
| Rel-11 | 11.0.0 | Read · Download (3GPP) |
| Rel-10 | 10.0.0 | Read · Download (3GPP) |
| Rel-9 | 9.0.0 | Read · Download (3GPP) |
| Rel-8 | 8.0.0 | Read · Download (3GPP) |
Scope of TS 26.226
Category: Services (Accessibility). Technology generation: Multi-Gen. Network layer: Services.
Who should read this specification?
- Device manufacturers
- Network operators
- Regulators and standards bodies
Implementation notes
Complexity level: Intermediate. Implementation difficulty: Medium.
Key technologies
Specifications referenced by TS 26.226
Specifications that reference TS 26.226
- TS 24.008 NAS Call, Mobility and Session Procedures
- TS 26.114 IMS Multimedia Telephony Client
- TS 23.002 3GPP System Architecture Overview
- TS 29.163 Interworking between 3GPP IM CN and CS networks
- TS 29.232 Mc Interface Protocol Profile
- TS 29.292 IMS Centralized Services (ICS) Interworking
- TS 29.235 SIP-I CS Core Network Interworking
- TS 23.226 Global Text Telephony (GTT) Stage 2
- TS 26.267 eCall In-band Modem Specification
- TS 29.332 MGCF-IM-MGW Interface Protocol (Mn)
- TR 26.967 eCall via CTM Suitability Analysis
- TR 26.969 eCall In-band Modem Performance Characterization
Other specifications in the 26 series
- TS 26.201 AMR-WB Speech Codec Frame Format
- TS 26.202 AMR-WB Speech Codec Mapping Specification
- TS 26.204 AMR-WB Floating-Point Codec Specification
- TS 26.223 IMS Telepresence Client Specification
- TS 26.230 CTM C Code Implementation for Text Transmission
- TS 26.231 CTM Minimum Performance Requirements Testing
- TS 26.233 3GPP Packet-Switched Streaming Service (PSS)
- TS 26.234 3GPP PSS Protocols and Codecs Specification
Related glossary terms
Related topics
Frequently asked questions
What is 3GPP TS 26.226?
3GPP TS 26.226 is the 3GPP Technical Specification for Cellular Text Telephone Modem (CTM). Specifies CTM for reliable text transmission over cellular speech channels, enabling text telephony for emergency calls and accessibility.
Which 3GPP releases include TS 26.226?
TS 26.226 is published in 12 releases, from Rel-8 to Rel-19. The latest version on 3GPP Explorer is 19.0.0 (Rel-19).
What category does TS 26.226 belong to?
TS 26.226 belongs to the Services (Accessibility) category of 3GPP specifications. It applies to Multi-Gen networks.
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