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Content for  TS 27.007  Word version:  17.2.0

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1  ScopeWord‑p. 10

The present document specifies a profile of AT commands and recommends that this profile be used for controlling Mobile Termination (MT) functions and network services from a Terminal Equipment (TE) through Terminal Adaptor (TA). The command prefix +C is reserved for Digital Cellular in ITU-T Recommendation V.250 [14]. The present document has also the syntax details used to construct extended commands. Commands from ITU-T Recommendation V.250 [14] and existing digital cellular standards (TIA IS-99 [15] and TIA IS-135 [16]) are used whenever applicable. Some of the new commands are defined such way that they can be easily applied to MT of other networks.
ITU-T Recommendation T.31 [11] and ITU-T Recommendation T.32 [12] fax AT commands may be used for GSM/UMTS fax transmission from TE. Short Message Service AT commands are defined in TS 27.005. AT commands for packet systems are defined in clause 10 of this specification. The present document assumes an abstract architecture comprising a TE (e.g. a computer) and a MT interfaced by a TA (see Figure 1). The span of control of the defined commands should allow handling of any physical implementation that this abstract architecture may lead to:
  • TA, MT and TE as three separate entities;
  • TA integrated under the MT cover, and the TE implemented as a separate entity;
  • TA integrated under the TE cover, and the MT implemented as a separate entity; and
  • TA and MT integrated under the TE cover as a single entity.
The commands described in the present document may be observed on the link between the TE and the TA. However, most of the commands retrieve information about the MT, not about the TA.
Reproduction of 3GPP TS 27.007, Figure 1: Setup
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Interface between TE and TA is intended to operate over existing serial (ITU-T Recommendation V.24) cables, infrared link, and all link types with similar behaviour. For correct operation many of the defined commands require eight bit data and therefore it is recommended that TE-TA link is set to eight bits/ byte mode. (For infrared operation implementation, refer informative references IrDA. For embedding AT commands and data during on-line data state, refer TIA-617/ITU-T V.80.) Interface between TA and MT is dependent on the interface in the MT.
The functional blocks shown in Figure 1, using AT commands, shall follow the principles described in the interactions handling framework 3GPP TS 23.227 [63].
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2  ReferencesWord‑p. 11

The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
  • References are either specific (identified by date of publication, edition number, version number, etc.) or non-specific.
  • For a specific reference, subsequent revisions do not apply.
  • For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TS 22.002: "Bearer Services (BS) supported by a GSM Public Land Mobile Network (PLMN)".
[2]
TS 22.003: "Teleservices supported by a GSM Public Land Mobile Network (PLMN)".
[3]
TS 22.081: "Line identification supplementary services - Stage 1".
[4]
TS 22.082: "Call Forwarding (CF) supplementary services - Stage 1".
[5]
TS 22.083: "Call Waiting (CW) and Call Hold (HOLD) supplementary services - Stage 1".
[6]
TS 22.088: "Call Barring (CB) supplementary services - Stage 1".
[7]
TS 23.003: "Numbering, addressing and identification".
[8]
TS 24.008: "Mobile Radio Interface Layer 3 specification; Core Network Protocols-Stage 3".
[9]
GSM MoU SE.13, GSM MoU Permanent Reference Document SE.13: "GSM Mobile Network Codes and Names".
[10]
ITU-T Recommendation E.212: "Identification plan for land mobile stations".
[11]
ITU-T Recommendation T.31: "Asynchronous facsimile DCE control, service class 1".
[12]
ITU-T Recommendation T.32: "Asynchronous facsimile DCE control, service class 2".
[13]
ITU-T Recommendation T.50: "International Reference Alphabet (IRA) (Formerly International Alphabet No. 5 or IA5) - Information technology - 7-bit coded character set for information exchange".
[14]
ITU-T Recommendation V.250: "Serial asynchronous automatic dialling and control".
[15]
TIA IS-99: "Data Services Option Standard for Wideband Spread Spectrum Digital Cellular System".
[16]
TIA IS-135: "800 MHz Cellular Systems, TDMA Services, Async Data and Fax".
[17]
PCCA STD-101 Data Transmission Systems and Equipment: "Serial Asynchronous Automatic Dialling and Control for Character Mode DCE on Wireless Data Services".
[18]
TS 24.022: "Radio Link Protocol (RLP) for data and telematic services on the Mobile Station - Base Station System (MS - BSS) interface and the Base Station System - Mobile-services Switching Centre (BSS - MSC) interface".
[19]
TS 22.030: "Man Machine Interface (MMI) of the Mobile Station (MS)".
[20]
TS 45.008: "Radio subsystem link control".
[21]
TS 22.085: "Closed User Group (CUG) supplementary services - Stage 1".
[22]
TS 22.084: "MultiParty (MPTY) supplementary services - Stage 1".
[23]
TS 22.090: "Unstructured Supplementary Service Data (USSD) - Stage 1".
[24]
TS 27.005: "Use of Data Terminal Equipment - Data Circuit terminating Equipment (DTE - DCE) interface for Short Message Service (SMS) and Cell Broadcast Service (CBS)".
[25]
TS 23.038: "Alphabet and language specific information".
[26]
TS 22.024: "Description of Charge Advice Information (CAI)".
[27]
TS 22.086: "Advice of Charge (AoC) supplementary services - Stage 1".
[28]
TS 51.011: "Specification of the Subscriber Identity Module - Mobile Equipment (SIM-ME) interface".
[29]
TS 22.034: "High Speed Circuit Switched Data (HSCSD) - Stage 1".
[30]
TS 22.091: "Explicit Call Transfer (ECT) supplementary service - Stage 1".
[31]
TS 22.072: "Call Deflection (CD) supplementary service - Stage 1".
[32]
ISO/IEC 10646: "Universal Multiple-Octet Coded Character Set (UCS)"; UCS2, 16 bit coding.
[33]
TS 22.022: "Personalization of GSM Mobile Equipment (ME) Mobile functionality specification".
[34]
TS 27.060: "General requirements on Mobile Stations (MS) supporting General Packet Radio Bearer Service (GPRS)".
[35]  Void.
[36]
CCITT Recommendation V.120: "Support by an ISDN of data terminal equipment with V-Series type interfaces with provision for statistical multiplexing".
[37]  Void.
[38]
TS 45.005: "Radio transmission and reception".
[39]
TS 29.061: "Interworking between the Public Land Mobile Network (PLMN) supporting GPRS and Packet Data Networks (PDN)".
[40]
TS 23.081: "Line identification supplementary services - Stage 2".
[41]
TS 27.001: "General on Terminal Adaptation Functions (TAF) for Mobile Stations (MS)".
[42]
TS 29.007: "General requirements on interworking between the Public Land Mobile Network (PLMN) and the Integrated Services Digital Network (ISDN) or Public Switched Telephone Network (PSTN)".
[43]
Infrared Data Association: Specification of Ir Mobile Communications (IrMC).
[44]
IrDA Object Exchange Protocol:
[45]
TS 27.010: "Terminal Equipment to User Equipment (TE-UE) multiplexer protocol User Equipment (UE)".
[46]
TS 23.107: "Quality of Service, Concept and Architecture".
[47]
TS 23.060: "General Packet Radio Service (GPRS) Service description; Stage 2".
[48]  Void.
[49]
TS 43.068: "Voice Group Call service (VGCS) - Stage 2".
[50]
TS 43.069: "Voice Broadcast Service (VBS) - Stage 2".
[51]  Void.
[52]
TS 44.068: "Voice Group Call service (VGCS) - Stage 3".
[53]
TS 44.069: "Voice Broadcast Service (VBS) - Stage 3".
[54]
TS 22.067: "enhanced Multi-Level Precedence and Pre-emption service (eMLPP) - Stage 1".
[55]
TS 42.068: "Voice Group Call service (VGCS) - Stage 1".
[56]
TS 42.069: "Voice Broadcast Service (VBS) - Stage 1".
[57]  Void.
[58]
TS 22.087: "User-to-User Signalling (UUS) - Stage 1".
[59]
TS 31.102: "Characteristics of the Universal Subscriber Identity Module (USIM) Application".
[60]
ETSI TS 102 221: "Smart Cards; UICC-Terminal interface; Physical and logical characteristics (Release 1999)".
[61]
TS 44.065: "Mobile Station (MS) - Serving GPRS Support Node (SGSN); Subnetwork Dependent Convergence Protocol (SNDCP)".
[62]
TS 25.323: "Packet Data Convergence Protocol (PDCP)".
[63]
TS 23.227: "Applications and User interaction in the UE-Principles and specific requirements", Release 5.
[64]  Void.
[65]
TS 31.101: "UICC-Terminal Interface; Physical and Logical Characteristics."
[66]
ETSI TS 102 310: "Smart Cards; Extensible Authentication Protocol support in the UICC".
[67]  Void.
[68]
RFC 3748:  "Extensible Authentication Protocol (EAP)".
[69]
RFC 3629:  "UTF-8, a transformation format of ISO 10646".
[70]
TS 44.318: "Generic Access (GA) to the A/Gb interface; Mobile GA interface layer 3 specification".
[71]
TS 44.060: "General Packet Radio Service (GPRS); Mobile Station (MS) - Base Station System (BSS) interface; Radio Link Control/Medium Access Control (RLC/MAC) protocol".
[72]
TS 25.308: "High Speed Downlink Packet Access (HSDPA): Overall Description; Stage 2".
[73]
TS 25.319: "Enhanced Uplink; Overall Description; Stage 2".
[74]
TS 25.331: "Radio Resource Control (RRC) protocol specification".
[75]
TS 24.216: "Communication Continuity Management Object (MO)".
[76]
TS 23.032: "Universal Geographical Area Description (GAD)".
[77]
TS 25.305: "User Equipment (UE) positioning in Universal Terrestrial Radio Access Network (UTRAN); Stage 2".
[78]
IEC 61162: "Maritime navigation and radio communication equipment and systems - Digital interfaces".
[79]
TS 44.031: "Location Services (LCS); Mobile Station (MS) - Serving Mobile Location Centre (SMLC), Radio Resource LCS Protocol (RRLP)".
[80]
TS 49.031: "Base Station System Application Part, LCS Extension (BSSAP-LE)".
[81]  Void.
[82]
TS 23.401: "GPRS enhancements for E-UTRAN access".
[83]
TS 24.301: "Non-Access-Stratum (NAS) protocol for Evolved Packet System (EPS)".
[84]  Void.
[85]
TS 23.203: "Policy and charging control architecture".
[86]
TS 36.331: "Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC); Protocol specification".
[87]
TS 24.173: "IMS multimedia telephony communication service and supplementary services; Stage 3".
[88]
RFC 4291:  "IP Version 6 Addressing Architecture".
[89]
TS 24.229: "IP multimedia call control protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP)".
[90]
TS 23.221: "Architectural requirements".
[91]
TS 24.237: "IP Multimedia Subsystem (IMS) Service Continuity".
[92]
TS 31.111: "Universal Subscriber Identity Module (USIM) Application Toolkit (USAT)".
[93]
TS 22.096: "Name identification supplementary services - Stage 1".
[94]
TS 23.096: "Name identification supplementary services - Stage 2".
[95]
TS 25.133: "Requirements for support of radio resource management (FDD)".
[96]
TS 25.123: "Requirements for support of radio resource management (TDD)".
[97]
TS 36.133: "Evolved Universal Terrestrial Radio Access (E-UTRA); Requirements for support of radio resource management".
[98]
TS 31.102: "Characteristics of the Universal Subscriber Identity Module (USIM) application".
[99]
TS 23.040: "Technical realization of the Short Message Service (SMS)".
[100]
TS 23.041: "Technical realization of Cell Broadcast Service (CBS)".
[101]
TS 24.341: "Support of SMS over IP networks".
[102]
TS 24.167: "3GPP IMS Management Object (MO); Stage 3".
[103]
IETF STD 5: "Internet Protocol".
[104]
IETF STD 51: "The Point-to-Point Protocol (PPP)".
[105]
RFC 1144:  "Compressing TCP/IP Headers for Low-Speed Serial Links".
[106]
RFC 2460:  "Internet Protocol, Version 6 (IPv6) Specification".
[107]
RFC 2507:  "IP Header Compression".
[108]
RFC 3095:  "RObust Header Compression (ROHC): Framework and four profiles: RTP, UDP, ESP, and uncompressed".
[109]
TS 24.080: "Mobile radio interface Layer 3 supplementary service specification; Formats and coding".
[110]
TS 29.002: "Mobile Application Part (MAP) specification".
[111]
RFC 3261:  "SIP: Session Initiation Protocol".
[112]
RFC 3966:  "The tel URI for Telephone Numbers".
[113]
RFC 3969:  "The Internet Assigned Number Authority (IANA) Uniform Resource Identifier (URI) Parameter Registryfor the Session Initiation Protocol (SIP)".
[114]
RFC 5341:  "The Internet Assigned Number Authority (IANA) tel Uniform Resource Identifier (URI) Parameter Registry".
[115]
TS 36.355: "Evolved Universal Terrestrial Radio Access (E-UTRA); LTE Positioning Protocol (LPP)".
[116]
RFC 2141:  "URN Syntax".
[117]
RFC 3406:  "Uniform Resource Names (URN) Namespace Definition Mechanisms".
[118]
RFC 5031:  "A Uniform Resource Name (URN) for Emergency and Other Well-Known Services".
[119]
TS 24.607: "Originating Identification Presentation (OIP) and Originating Identification Restriction (OIR) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[120]
TS 24.608: "Terminating Identification Presentation (TIP) and Terminating Identification Restriction (TIR) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[121]
TS 24.654: "Closed User Group (CUG) using IP Multimedia (IM) Core Network (CN) subsystem, Protocol Specification".
[122]
RFC 4715:  "The Integrated Services Digital Network (ISDN) Subaddress Encoding Type for tel URI".
[123]
TS 22.093: "Completion of Calls to Busy Subscriber (CCBS); Service description, Stage 1".
[124]
TS 22.094: "Follow Me service description; Stage 1".
[125]
TS 22.097: "Multiple Subscriber Profile (MSP) Phase 2; Service description; Stage 1".
[126]
TS 22.135: "Multicall; Service description; Stage 1".
[127]
TS 24.182: "IP Multimedia Subsystem (IMS) Customized Alerting Tones (CAT); Protocol specification".
[128]
TS 24.183: "IP Multimedia Subsystem (IMS) Customized Ringing Signal (CRS); Protocol specification".
[129]
TS 24.239: "Flexible Alerting (FA) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[130]
TS 24.259: "Personal Network Management (PNM)".
[131]
TS 24.390: "Unstructured Supplementary Service Data (USSD) using IP Multimedia (IM) Core Network (CN) subsystem IMS".
[132]
TS 24.604: "Communication Diversion (CDIV) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[133]
TS 24.605: "Conference (CONF) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[134]
TS 24.606: "Message Waiting Indication (MWI) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[135]
TS 24.610: "Communication HOLD (HOLD) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[136]
TS 24.611: "Anonymous Communication Rejection (ACR) and Communication Barring (CB) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[137]
TS 24.615: "Communication Waiting (CW) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol Specification".
[138]
TS 24.616: "Malicious Communication Identification (MCID) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[139]
TS 24.629: "Explicit Communication Transfer (ECT) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[140]
TS 24.642: "Completion of Communications to Busy Subscriber (CCBS) and Completion of Communications by No Reply (CCNR) using IP Multimedia (IM) Core Network (CN) subsystem; Protocol specification".
[141]
TS 24.647: "Advice Of Charge (AOC) using IP Multimedia (IM) Core Network (CN) subsystem".
[142]
TS 36.509: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Packet Core (EPC); Special conformance testing functions for User Equipment (UE)".
[143]
TS 25.102: "Multiplexing and channel coding (TDD)".
[144]
TS 25.212: "Multiplexing and channel coding (FDD)".
[145]
TS 36.300: "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description".
[146]
TS 45.001: "Physical layer on the radio path; General description".
[147]
TS 22.101: "Service aspects; Service principles".
[148]
TS 24.090: "Unstructured Supplementary Service Data (USSD); Stage 3".
[149]
TS 23.682: "Architecture Enhancements to facilitate communications with Packet Data Networks and Applications".
[150]
TS 36.443: "Evolved Universal Terrestrial Radio Access Network (E-UTRAN); M2 Application Protocol (M2AP)".
[151]
Wi-Fi Alliance: "Hotspot 2.0 (Release 2) Technical Specification, version 1.0.0", 2014-08-08.
[152]
IEEE Std 802.11™-2012: "Information Technology- Telecommunications and information exchange between systems-Local and metropolitan area networks-Specific requirements-Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications".
[153]
TS 24.312: "Access Network Discovery and Selection Function (ANDSF) Management Object (MO)".
[154]
TS 36.101: "Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) radio transmission and reception".
[155]
RFC 4122:  "A Universally Unique IDentifier (UUID) URN Namespace".
[156]
TS 44.018: "GSM/EDGE Radio Resource Control (RRC) protocol".
[157]
CEN EN 15722:2015 (April 2015): "Intelligent transport systems - ESafety - ECall minimum set of data".
[158]
TS 36.321: "Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification".
[159]
TS 38.300: "NR; NR and NG-RAN Overall Description".
[160]
TS 38.331: "NR; Radio Resource Control (RRC); Protocol specification".
[161]
TS 24.501: "Access-Stratum (NAS) protocol for 5G System (5GS); Stage 3".
[162]
TS 37.340: "Evolved Universal Terresterial Radio Access (E-UTRA) and NR; Multi-Connectivity; Stage 2".
[163]
TS 24.196: "Enhanced Calling Name (eCNAM)".
[164]
TS 22.173: "IP Multimedia Core Network Subsystem (IMS) Multimedia Telephony Service and supplementary services".
[165]
TS 23.501: "System Architecture for the 5G System; Stage 2".
[166]
TS 36.213: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer procedures".
[167]
TS 36.214: "Evolved Universal Terrestrial Radio Access (E-UTRA); Physical layer; Measurements".
[168]
TS 24.250: "Protocol for Reliable Data Service between UE and SCEF; Stage 3".
[169]
TS 38.133: "NR; Requirements for support of radio resource management".
[170]
TS 22.011: "Service accessibility".
[171]
TS 23.216: "Single Radio Voice Call Continuity (SRVCC); Stage 2".
[172]
TS 24.486: "Vehicle-to-Everything (V2X) Application Enabler (VAE) layer; Protocol aspects; Stage 3".
[173]
TS 23.273: "5G System (5GS) Location Services (LCS); Stage 2".
[174]
RFC 3339:  "Date and Time on the Internet: Timestamps".
[175]
TS 24.587: "Vehicle-to-Everything (V2X) services in 5G System (5GS); Stage 3".
[176]
TS 38.321: "NR; Medium Access Control (MAC) protocol specification".
[177]
TS 24.193: "Access Traffic Steering, Switching and Splitting; Stage 3".
[178]
TS 38.509: "5GS; Special conformance testing functions for User Equipment".
[179]
TS 38.215: "NR; Physical layer measurements".
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3  Definitions and abbreviationsWord‑p. 19

3.1  Definitions

For the purposes of the present document, the following syntactical definitions apply (refer also clause 4):
<CR>
Carriage return character, which value is specified with command S3.
<LF>
Linefeed character, which value is specified with command S4.
<...>
Name enclosed in angle brackets is a syntactical element. Brackets themselves do not appear in the command line.
[...]
Optional subparameter of a command or an optional part of TA information response is enclosed in square brackets. Brackets themselves do not appear in the command line. When subparameter is not given in parameter type commands, new value equals to its previous value. In action type commands, action should be done on the basis of the recommended default setting of the subparameter.
underline
Underlined defined subparameter value is the recommended default setting of this subparameter. In parameter type commands, this value should be used in factory settings which are configured by ITU-T Recommendation V.250 [14] command &F0. In action type commands, this value should be used when subparameter is not given.
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3.2  Abbreviations

For the purposes of the present document, the following abbreviations apply:
5GCN
5G Core Network
5GS
5G System
AT
ATtention; this two-character abbreviation is always used to start a command line to be sent from TE to TA
ASCI
Advanced Speech Call Items, including VGCS, VBS and eMLPP
BCD
Binary Coded Decimal
BL
Bandwidth reduced Low complexity
CAG
Closed Access Group
CBR
Channel Busy Ratio
CSG
Closed Subscriber Group
eMLPP
Enhanced Multi-Level Precedence and Pre-emption Service
ETSI
European Telecommunications Standards Institute
FTM
Frame Tunnelling Mode (refer TS 27.001 and TS 29.007)
HRNN
Human-Readable Network Name
HSCSD
High Speed Circuit Switched Data
IMEI
International Mobile station Equipment Identity
IRA
International Reference Alphabet (ITU-T Recommendation T.50 [13])
IrDA
Infrared Data Association
ISO
International Standards Organization
ITU-T
International Telecommunication Union - Telecommunications Standardization Sector
ME
Mobile Equipment
MMTEL
Multimedia Telephony
MoU
Memorandum of Understanding (GSM operator joint)
MT
Mobile Termination
MTU
Maximum Transfer Unit
NB-IoT
NarrowBand Internet of Things
NG-RAN
Next Generation Radio Access Network
NSLPI
NAS Signalling Low Priority Indication
PCCA
Portable Computer and Communications Association
PTT
Push to Talk
RDI
Restricted Digital Information
RLP
Radio Link Protocol
SIM
Subscriber Identity Module
TA
Terminal Adaptor, e.g. a GSM data card (equal to DCE; Data Circuit terminating Equipment)
TE
Terminal Equipment, e.g. a computer (equal to DTE; Data Terminal Equipment)
TIA
Telecommunications Industry Association
UDI
Unrestricted Digital Information
UE
User Equipment
UICC
Universal Integrated Circuit Card
USAT
USIM Application Toolkit
USIM
Universal Subscriber Identity Module
VAE
V2X Application Enabler
VBS
Voice Broadcast Service
VGCS
Voice Group Call Service
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