id
stringlengths
5
12
title
stringlengths
8
250
type
stringclasses
2 values
version
stringclasses
560 values
working_group
stringclasses
30 values
url
stringlengths
67
81
scope
stringlengths
0
65.7k
23.042
Compression algorithm for text messaging services
TS
10.0.0
C1
https://www.3gpp.org/ftp/Specs/archive/23_series/23.042/23042-a00.zip
23.040
Technical realization of the Short Message Service (SMS)
TS
10.0.0
C1
https://www.3gpp.org/ftp/Specs/archive/23_series/23.040/23040-a00.zip
23.067
enhanced Multi-Level Precedence and Pre-emption Service (eMLPP); Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.067/23067-a00.zip
23.072
Call Deflection (CD) supplementary service; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.072/23072-a00.zip
23.078
Customised Applications for Mobile network Enhanced Logic (CAMEL) Phase 4; Stage 2
TS
10.1.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.078/23078-a10.zip
23.079
Support of Optimal Routeing (SOR); Technical realization
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.079/23079-a00.zip
23.081
Line Identification supplementary services; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.081/23081-a00.zip
23.057
Mobile Execution Environment (MExE); Functional description; Stage 2
TS
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.057/23057-a00.zip
23.066
Support of Mobile Number Portability (MNP); Technical realization; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.066/23066-a00.zip
23.082
Call Forwarding (CF) supplementary services; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.082/23082-a00.zip
23.083
Call Waiting (CW) and Call Hold (HOLD) supplementary services; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.083/23083-a00.zip
23.060
General Packet Radio Service (GPRS); Service description; Stage 2
TS
10.14.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.060/23060-ae0.zip
23.088
Call Barring (CB) Supplementary Services; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.088/23088-a00.zip
23.085
Closed User Group (CUG) supplementary service; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.085/23085-a00.zip
23.090
Unstructured Supplementary Service Data (USSD); Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.090/23090-a00.zip
23.086
Advice of Charge (AoC) supplementary services; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.086/23086-a00.zip
23.091
Explicit Call Transfer (ECT) supplementary service; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.091/23091-a00.zip
23.093
Technical realization of Completion of Calls to Busy Subscriber (CCBS); Stage 2
TS
10.0.1
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.093/23093-a01.zip
23.094
Follow-Me (FM); Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.094/23094-a00.zip
23.096
Name identification supplementary services; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.096/23096-a00.zip
23.097
Multiple Subscriber Profile (MSP) (Phase 2); Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.097/23097-a00.zip
23.101
General Universal Mobile Telecommunications System (UMTS) architecture
TS
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.101/23101-a00.zip
23.107
Quality of Service (QoS) concept and architecture
TS
10.2.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.107/23107-a20.zip
23.108
Mobile radio interface layer 3 specification, core network protocols; Stage 2
TS
10.0.0
C1
https://www.3gpp.org/ftp/Specs/archive/23_series/23.108/23108-a00.zip
23.110
Universal Mobile Telecommunications System (UMTS) access stratum; Services and functions
TS
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.110/23110-a00.zip
23.116
Super-Charger technical realization; Stage 2
TS
10.1.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.116/23116-a10.zip
23.119
Gateway Location Register (GLR); Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.119/23119-a00.zip
23.122
Non-Access-Stratum (NAS) functions related to Mobile Station (MS) in idle mode
TS
10.5.0
C1
https://www.3gpp.org/ftp/Specs/archive/23_series/23.122/23122-a50.zip
23.135
Multicall supplementary service; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.135/23135-a00.zip
23.141
Presence service; Architecture and functional description
TS
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.141/23141-a00.zip
23.142
Value-added Services for SMS (VAS4SMS); Interface and signalling flow
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.142/23142-a00.zip
23.153
Out of band transcoder control; Stage 2
TS
10.1.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.153/23153-a10.zip
23.087
User-to-User Signalling (UUS) supplementary service; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.087/23087-a00.zip
23.167
IP Multimedia Subsystem (IMS) emergency sessions
TS
10.11.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.167/23167-ab0.zip
23.172
Technical realization of Circuit Switched (CS) multimedia service UDI/RDI fallback and service modification; Stage 2
TS
10.0.1
C3
https://www.3gpp.org/ftp/Specs/archive/23_series/23.172/23172-a01.zip
23.202
Circuit switched data bearer services
TS
10.0.1
C3
https://www.3gpp.org/ftp/Specs/archive/23_series/23.202/23202-a01.zip
23.204
Support of Short Message Service (SMS) over generic 3GPP Internet Protocol (IP) access; Stage 2
TS
10.2.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.204/23204-a20.zip
The present document specifies the new capabilities and enhancements needed to support SMS over a generic IP Connectivity Access Network (IP-CAN) using IMS capabilities (TS 23.228 [9]). These include (but are not limited) to: 1 Enhancements to the HSS; 2 Communication between the SMS-GMSC/SMS-IWMSC and the HSS; 3 Authe...
23.203
Policy and charging control architecture
TS
10.10.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.203/23203-aa0.zip
The present document specifies the overall stage 2 level functionality for Policy and Charging Control that encompasses the following high level functions for IP‑CANs (e.g. GPRS, Fixed Broadband, EPC, etc.): - Flow Based Charging for network usage, including charging control and online credit control, for service data ...
23.146
Technical realization of facsimile Group 3 non-transparent
TS
10.0.1
C3
https://www.3gpp.org/ftp/Specs/archive/23_series/23.146/23146-a01.zip
23.216
Single Radio Voice Call Continuity (SRVCC); Stage 2
TS
10.6.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.216/23216-a60.zip
23.207
End-to-end Quality of Service (QoS) concept and architecture
TS
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.207/23207-a00.zip
23.218
IP Multimedia (IM) session handling; IM call model; Stage 2
TS
10.0.0
C1
https://www.3gpp.org/ftp/Specs/archive/23_series/23.218/23218-a00.zip
23.226
Global text telephony (GTT); Stage 2
TS
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.226/23226-a00.zip
23.205
Bearer-independent circuit-switched core network; Stage 2
TS
10.2.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.205/23205-a20.zip
23.221
Architectural requirements
TS
10.3.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.221/23221-a30.zip
23.234
3GPP system to Wireless Local Area Network (WLAN) interworking; System description
TS
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.234/23234-a00.zip
This document provides an index to the set of specifications for interworking between 3GPP systems and Wireless Local Area Networks (WLANs). No further changes to this specification are intended. If any future evolution of the procedures in this specification is necessary, it should be documented in other specification...
23.237
IP Multimedia Subsystem (IMS) Service Continuity; Stage 2
TS
10.13.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.237/23237-ad0.zip
23.228
IP Multimedia Subsystem (IMS); Stage 2
TS
10.9.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.228/23228-a90.zip
23.240
3GPP Generic User Profile (GUP); Architecture (Stage 2)
TS
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.240/23240-a00.zip
23.246
Multimedia Broadcast/Multicast Service (MBMS); Architecture and functional description
TS
10.3.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.246/23246-a30.zip
23.251
Network sharing; Architecture and functional description
TS
10.6.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.251/23251-a60.zip
23.259
Personal Network Management (PNM); Procedures and information flows; Stage 2
TS
10.0.0
C1
https://www.3gpp.org/ftp/Specs/archive/23_series/23.259/23259-a00.zip
23.261
IP flow mobility and seamless Wireless Local Area Network (WLAN) offload; Stage 2
TS
10.2.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.261/23261-a20.zip
23.271
Functional stage 2 description of Location Services (LCS)
TS
10.4.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.271/23271-a40.zip
23.272
Circuit Switched (CS) fallback in Evolved Packet System (EPS); Stage 2
TS
10.15.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.272/23272-af0.zip
This document defines the Stage 2 architecture and specification for the CS Fallback and for SMS over SGs for EPS or CS Fallback and SMS over S102. The scope of this document includes the architecture enhancements for functionality to enable fallback from E-UTRAN access to UTRAN/GERAN CS domain access and to CDMA 1x RT...
23.084
Multi Party (MPTY) supplementary service; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.084/23084-a00.zip
23.279
Combining Circuit Switched (CS) and IP Multimedia Subsystem (IMS) services; Stage 2
TS
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.279/23279-a00.zip
23.231
SIP-I based circuit-switched core network; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.231/23231-a00.zip
23.236
Intra-domain connection of Radio Access Network (RAN) nodes to multiple Core Network (CN) nodes
TS
10.3.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.236/23236-a30.zip
23.327
Mobility between 3GPP-Wireless Local Area Network (WLAN) interworking and 3GPP systems
TS
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.327/23327-a00.zip
This document specifies the stage 2 system description for providing mobility between 3GPP Wireless Local Area Network Interworking (I‑WLAN) and 3GPP Systems. The I-WLAN feature defined in TS 23.234 [2] has been discontinued since Release 13 and it is removed from this specification.
23.333
Multimedia Resource Function Controller (MRFC) - Multimedia Resource Function Processor (MRFP) Mp interface: Procedures descriptions
TS
10.5.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.333/23333-a50.zip
23.278
Customised Applications for Mobile network Enhanced Logic (CAMEL) Phase 4; Stage 2; IM CN Interworking
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.278/23278-a00.zip
23.334
IP Multimedia Subsystem (IMS) Application Level Gateway (IMS-ALG) - IMS Access Gateway (IMS-AGW) interface: Procedures descriptions
TS
10.5.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.334/23334-a50.zip
23.292
IP Multimedia Subsystem (IMS) centralized services; Stage 2
TS
10.6.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.292/23292-a60.zip
23.284
Local Call Local Switch (LCLS); Stage 2
TS
10.5.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.284/23284-a50.zip
23.335
User Data Convergence (UDC); Technical realization and information flows; Stage 2
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.335/23335-a00.zip
23.380
IMS Restoration Procedures
TS
10.3.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.380/23380-a30.zip
23.401
General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access
TS
10.13.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.401/23401-ad0.zip
23.402
Architecture enhancements for non-3GPP accesses
TS
10.10.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.402/23402-aa0.zip
23.824
IP-Short-Message-Gateway (IP-SM-GW) enhancements for interworking with Open Mobile Alliance (OMA) Converged IP Messaging (CPM)
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.824/23824-a00.zip
The present document specifies the new capabilities and enhancements needed to support SMS over a generic IP Connectivity Access Network (IP-CAN) using IMS capabilities (TS 23.228 [9]). These include (but are not limited) to: 1 Enhancements to the HSS; 2 Communication between the SMS-GMSC/SMS-IWMSC and the HSS; 3 Authe...
23.829
Local IP Access and Selected IP Traffic Offload (LIPA-SIPTO)
TR
10.0.1
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.829/23829-a01.zip
Support of Local IP access for the Home (e)NodeB Subsystem and of Selected IP traffic offload for the Home (e)NodeB Subsystem and for the macro layer network is required in TS 22.220 [3] and TS 22.101 [2]. This Technical Report describes the following functionalities: - Local IP access – LIPA – to residential/corporate...
23.854
Enhancements for Multimedia Priority Service (MPS)
TR
1.4.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.854/23854-140.zip
MPS will enable National Security/Emergency Preparedness (NS/EP) users (herein called Service Users) to make priority calls/sessions using the public networks. This service needs to be ensured also under special conditions such as network congestion. Service Users are the government-authorized personnel, emergency mana...
23.845
Study on User Data Convergence (UDC) evolution
TR
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.845/23845-a00.zip
The present document is addressing a number of topics regarding User Data Convergence evolution. Some of these topics were identified in the Rel9 work but have been delayed, others are new. These topics are largely independent of each other and are studied separately in this document. They will be normally addressed th...
23.856
Single Radio Voice Call Continuity (SRVCC) enhancements; Stage 2
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.856/23856-a00.zip
SR-VCC has been standardized in Release 8 TS 23.216 [3] to provide seamless continuity when UE handovers from E-UTRAN to UTRAN/GERAN. This document contains the results of feasibility study of the requirements and the alternative solutions to improve the handover performance of SRVCC. The objective of this study is as ...
23.832
IP Multimedia Subsystem (IMS) aspects of architecture for Home Node B (HNB); Stage 2
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.832/23832-a00.zip
This Technical Report describes an IMS capable HNB SubSystem (the HNB and the HNB Gateway) as an optional capability of HNB that allows e.g. an operator to offload CS traffic to the IMS. The HNB and HNB Gateway are described in TR 23.830 [5], and the capabilities of these network elements are assumed by this TR. To ach...
23.860
Enabling coder selection and rate adaptation for UTRAN and E-UTRAN for load adaptive applications; Stage 2
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.860/23860-a00.zip
The system enhancements to enable codec rate adaptation at voice call setup over E-UTRA was standardized in Rel-9 in TS 23.401 [2]. The scope of this document is to study and specify enhancements to existing codec selection and codec rate adaptation based on network loading conditions and operator policies over UTRA an...
23.834
Study on General Packet Radio Service (GPRS) Tunelling Protocol (GTP) based S2b; Stage 2
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.834/23834-a00.zip
The objective of this feasibility study is to investigate solutions and benefits for supporting a new GTP option for S2b network based mobility. The study will develop the stage 2 message flows necessary to support S2b based on GTP and mobility between S5/S8 based on GTP and S2b based on GTP.
23.894
System enhancements for the use of IP Multimedia Subsystem (IMS) services in local breakout and optimal routeing of media
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.894/23894-a00.zip
This study intends to investigate the general problem of system enhancements for the use of IMS services in local breakout and optimal routeing of media. In particular the above issues will be addressed identifying - solutions for the home operator to control - whether the IMS user may connect to a PDN in the visited n...
23.889
Local Call Local Switch (LCLS) system impacts; Feasibility study
TR
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/23_series/23.889/23889-a00.zip
The present document provides a study into the Core Network impacts for providing a solution for Local Call Local Switching. The document analyses and evaluates different solutions to determine the benefits provided compared to the identified impacts. Specific considerations are given to the following areas:- - Sending...
23.831
IP Multimedia Subsystem (IMS) service continuity; Inter-UE transfer enhancements; Stage 2
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.831/23831-a00.zip
This technical report intends to develop enhancements to Rel-9 IMS Service Continuity in TS 23.237 [2], specifically in the functional area of Inter-UE Transfer. The main objective is to provide enhancements to mobility of media flows of a session between different UEs (Inter-UE Transfer) with respect to the following ...
23.886
Feasibility Study of Single Radio Video Call Continuity (vSRVCC); Stage 2
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.886/23886-a00.zip
The objective of the feasibility study is to investigate a solution for supporting single radio the video call continuity from E-UTRAN/HSPA to UTRAN-CS based on the Rel-8/9 Single Radio Voice Call Continuity (SRVCC) architecture as specified in TS 23.216 [2] and TS 23.237 [3], and study the mechanisms to resolve the ke...
23.976
Push architecture
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.976/23976-a00.zip
23.977
Bandwidth And Resource Savings (BARS) and speech enhancements for Circuit Switched (CS) networks
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.977/23977-a00.zip
23.903
Redial solution for voice-video switching
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.903/23903-a00.zip
24.002
GSM - UMTS Public Land Mobile Network (PLMN) Access Reference Configuration
TS
10.0.0
C1
https://www.3gpp.org/ftp/Specs/archive/24_series/24.002/24002-a00.zip
23.981
Interworking aspects and migration scenarios for IPv4-based IP Multimedia Subsystem (IMS) implementations
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.981/23981-a00.zip
23.924
Feasibility study on Non-Access Stratum (NAS) node selection function above Base Station Controller (BSC) / Radio Network Controller (RNC)
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.924/23924-a00.zip
23.919
Direct tunnel deployment guideline
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.919/23919-a00.zip
23.979
3GPP enablers for Open Mobile Alliance (OMA); Push-to-talk over Cellular (PoC) services; Stage 2
TR
10.0.0
S2
https://www.3gpp.org/ftp/Specs/archive/23_series/23.979/23979-a00.zip
24.022
Radio Link Protocol (RLP) for circuit switched bearer and teleservices
TS
10.0.1
C3
https://www.3gpp.org/ftp/Specs/archive/24_series/24.022/24022-a01.zip
24.007
Mobile radio interface signalling layer 3; General Aspects
TS
10.0.0
C1
https://www.3gpp.org/ftp/Specs/archive/24_series/24.007/24007-a00.zip
24.030
Location Services (LCS); Supplementary service operations; Stage 3
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/24_series/24.030/24030-a00.zip
24.067
Enhanced Multi-Level Precedence and Pre-emption service (eMLPP); Stage 3
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/24_series/24.067/24067-a00.zip
24.072
Call Deflection (CD) supplementary service; Stage 3
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/24_series/24.072/24072-a00.zip
24.080
Mobile radio interface layer 3 supplementary services specification; Formats and coding
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/24_series/24.080/24080-a00.zip
The present document contains the coding of information necessary for support of supplementary service operation on the mobile radio interface layer 3. Clause 2 gives the functional definitions and contents of messages for call independent supplementary service operations. Messages necessary for support of call related...
24.081
Line Identification supplementary services; Stage 3
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/24_series/24.081/24081-a00.zip
24.082
Call Forwarding (CF) supplementary services; Stage 3
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/24_series/24.082/24082-a00.zip
24.083
Call Waiting (CW) and Call Hold (HOLD) supplementary services; Stage 3
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/24_series/24.083/24083-a00.zip
24.084
Multi Party (MPTY) supplementary service; Stage 3
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/24_series/24.084/24084-a00.zip
24.085
Closed User Group (CUG) supplementary service; Stage 3
TS
10.0.0
C4
https://www.3gpp.org/ftp/Specs/archive/24_series/24.085/24085-a00.zip