ETSI TS 103 368 V1.2.1 (2021-06)

ETSI TS 103 368 V1.2.1 (2021-06)






TECHNICAL SPECIFICATION
Rail Telecommunications;
Commands necessary for mobile
radio equipment operation on railways

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2 ETSI TS 103 368 V1.2.1 (2021-06)

Reference
RTS/RT-0072
Keywords
GSM-R, radio, railways

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© ETSI 2021.
All rights reserved.

ETSI

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3 ETSI TS 103 368 V1.2.1 (2021-06)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 5
1 Scope . 6
2 References . 6
2.1 Normative references . 6
2.2 Informative references . 7
3 Definition of terms, symbols and abbreviations . 7
3.1 Terms . 7
3.2 Symbols . 7
3.3 Abbreviations . 7
4 General requirements for AT commands . 8
4.1 AT command syntax . 8
4.1.1 Alphabet . 8
4.1.2 Command Lines . 8
4.1.3 Basic Syntax Commands . 8
4.1.4 Extended Syntax Commands . 8
4.1.5 Issuing Commands . 8
4.1.6 Executing Commands . 8
4.1.7 MT Responses . 8
4.2 TE-TA interface commands . 9
4.2.1 Escape code character used to switch from Online Data state to Online Command state: S2 . 9
4.2.2 Command line termination character: S3. 9
4.2.3 Response formatting character: S4 . 9
4.2.4 Command echo: E . 9
4.2.5 Result code suppression: Q . 10
4.2.6 TA response format: V . 10
4.2.7 Defines CONNECT result code format and dial tone and busy detection: X . 10
4.2.8 Behaviour of circuit 109 DCD: &C . 10
4.2.9 Behaviour of circuit 108/2 DTR: &D . 10
4.2.10 Data rate command at which the DCE will accept commands: +IPR . 11
4.2.11 DTE-DCE character framing: +ICF . 11
4.2.12 Select DTE-DCE flow control mechanism: +IFC . 11
4.3 Result Codes . 11
4.4 General commands . 13
4.4.1 Request manufacturer identification: +CGMI . 13
4.4.2 Request model identification: +CGMM . 13
4.4.3 Request revision identification: +CGMR . 13
4.4.4 Request product serial number identification: +CGSN . 14
5 AT Commands for voice and CS . 14
5.1 Call control commands and methods . 14
5.1.1 Automatic answer: S0 . 14
5.1.2 Dial command: D . 14
5.1.3 Call clearing: H . 15
5.1.4 Select bearer service type: +CBST . 15
5.1.5 Radio link protocol: +CRLP . 16
5.1.6 Extended error report: +CEER. 16
5.1.7 Cellular result codes: +CRC . 16
5.2 Network service related commands . 16
5.2.1 Subscriber number: +CNUM . 16
5.2.2 Network registration: +CREG . 17
5.2.3 PLMN selection: +COPS . 17
5.2.4 Facility lock: +CLCK . 17
5.2.5 Change password: +CPWD . 17
ETSI

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4 ETSI TS 103 368 V1.2.1 (2021-06)
5.2.6 Calling line identification presentation: +CLIP . 17
5.2.7 Calling line identification restriction: +CLIR . 18
5.2.8 Connected line identification presentation: +COLP . 18
5.2.9 Call forwarding number and conditions: +CCFC . 18
5.2.10 Call waiting: +CCWA . 18
5.2.11 Call related supplementary services: +CHLD . 18
5.2.12 Unstructured supplementary service data: +CUSD . 18
5.2.13 List current calls: +CLCC . 19
5.2.14 User to user signalling service 1: +CUUS1 . 19
5.2.15 Answer: A . 19
5.3 Mobile termination control and status commands . 19
5.3.1 Enter PIN: +CPIN . 19
5.3.2 Signal quality: +CSQ . 19
5.3.3 Restricted SIM access: +CRSM. 20
5.3.4 Automatic time zone update: +CTZU . 20
5.3.5 Time zone reporting: +CTZR . 20
5.3.6 Phone activity status: +CPAS . 20
5.4 Mobile termination errors . 21
5.4.1 Report mobile termination error: +CMEE . 21
5.4.2 Mobile termination error result code: +CME ERROR . 21
6 AT commands for Packet Switched services . 21
6.1 General . 21
6.2 Commands specific to MTs supporting the packet Switched services . 21
6.2.1 Define PDP context: +CGDCONT . 21
6.2.2 3G Quality of service profile (requested): +CGEQREQ . 22
6.2.3 3G quality of service profile (negotiated): +CGEQNEG . 22
6.2.4 PS attach or detach: +CGATT . 22
6.2.5 Automatic attachment to the PS network: +RCGATT . 22
6.2.6 PDP context activate or deactivate: +CGACT . 23
6.2.7 PDP context modify: +CGCMOD . 23
6.2.8 Enter data state: +CGDATA . 24
6.2.9 Show PDP address(es): +CGPADDR . 24
6.2.10 GPRS mobile station class: +CGCLASS . 24
6.2.11 Packet domain event reporting: +CGEREP . 24
6.2.12 GPRS network registration status: +CGREG . 25
6.2.13 Multiplexing mode: +CMUX . 25
7 AT Commands for eREC, VGCS and VBS Services . 26
7.1 AT+CGIPC - Group Id prefixes capability . 26
7.2 Request and termination of VGCS or VBS service: 'D' and 'H ' . 27
7.3 AT+CSCB - Select Cell Broadcast Message Indication . 27
7.4 AT+CNMI - New short Message Indication . 27
7.5 eMLPP subscriptions: +CPPS . 27
7.6 Fast call setup conditions: +CFCS . 27
7.7 Automatic answer for eMLPP Service: +CAAP . 27
7.8 AT+CGCS - VGCS subscriptions and GId status . 28
7.9 AT+CBCS - VBS subscriptions and GId status . 28
7.10 AT+CAJOIN - Accept an incoming VGCS or VBS Call . 28
7.11 AT+ CAREJ - Reject an incoming VGCS or VBS Call . 28
7.12 AT+ CAHLD - Leave an ongoing VGCS or VBS Call . 28
7.13 AT+ CAPTT - Talker Access for VGCS . 28
7.14 AT+ CAULEV - VGCS Uplink Status Presentation . 29
7.15 AT+ CALCC - List current VGCS and VBS Calls . 29
7.16 AT+ CACSP - VGCS or VBS Call State Attribute Presentation . 29
7.17 AT+ CANCHEV - NCH Support Indication . 29
7.18 AT+ COTDI - Originator to Dispatcher Information . 29
History . 30


ETSI

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5 ETSI TS 103 368 V1.2.1 (2021-06)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI Web server (https://ipr.etsi.org/).
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
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ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no
right to use or reproduce any trademark and/or tradename. Mention of those trademarks in the present document does
not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its

Members. 3GPP™ and LTE™ are trademarks of ETSI registered for the benefit of its Members and of the 3GPP
Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of the
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oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This Technical Specification (TS) has been produced by ETSI Technical Committee Railway Telecommunications
(RT).
Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.

ETSI

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6 ETSI TS 103 368 V1.2.1 (2021-06)
1 Scope
The present document defines the minimum set of commands necessary for mobile radio systems operation on
Railways. The following operational cases are addressed within the present document:
• GSM-R Circuit Switched Voice (including ASCI calls, Enhanced Railway Emergency Call, etc.).
• GSM-R Circuit Switched Data (CS) bearer service.
• GSM-R Packet Switched (PS) bearer service.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found at
https://docbox.etsi.org/Reference/.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are necessary for the application of the present document.
[1] ETSI TS 127 007 (V4.7.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); LTE; AT command set for User Equipment (UE)
(3GPP TS 27.007 version 4.7.0 Release 4)".
[2] Recommendation ITU-T V.250 (07/2003): "Serial asynchronous automatic dialling and control".
[3] Void.
[4] ETSI TS 122 011 (V4.8.0): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Service accessibility (3GPP TS 22.011
version 4.8.0 Release 4)".
[5] ETSI TS 127 010 (V4.2.0): "Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); Terminal Equipment to Mobile Station
(TE-MS) multiplexer protocol (3GPP TS 27.010 version 4.2.0 Release 4)".
[6] ETSI TS 127 005 (V4.2.1): " Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Use of Data Terminal Equipment - Data Circuit
terminating Equipment (DTE-DCE) interface for Short Message Service (SMS) and Cell
Broadcast Service (CBS) (3GPP TS 27.005 version 4.2.1 Release 4)".
[7] ETSI TS 122 030 (V4.1.0): " Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); Man-Machine Interface (MMI) of the
User Equipment (UE) (3GPP TS 22.030 version 4.1.0 Release 4)".
[8] ETSI TS 127 007 (V13.4.0): " Digital cellular telecommunications system (Phase 2+) (GSM);
Universal Mobile Telecommunications System (UMTS); LTE; AT command set for User
Equipment (UE) (3GPP TS 27.007 version 13.4.0 Release 13)".
ETSI

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7 ETSI TS 103 368 V1.2.1 (2021-06)
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long term validity.
The following referenced documents are not necessary for the application of the present document but they assist the
user with regard to a particular subject area.
[i.1] ETSI TS 127 060 (V4.3.1): "Digital cellular telecommunications system (Phase 2+); Universal
Mobile Telecommunications System (UMTS); Packet domain; Mobile Station (MS) supporting
Packet Switched services (3GPP TS 27.060 version 4.3.1 Release 4)".
[i.2] EIRENE SRS: "System Requirements Specification", version 16.0.0".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the following terms apply:
ETCS application(s): application(s) comprising the EuroRadio protocol suite
non-ETCS application(s): application(s) comprising any other protocol suites than EuroRadio
3.2 Symbols
Void.
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
APN Access Point Name
ASCI Advanced Speech Call Items
AT ATtention
CS Circuit Switch
CTS Clear To Send
DCD Data Carrier Detect
DCE Data Circuit Equipment
DTE Data Terminal Equipment
DTR Data Terminal Ready
EDOR ETCS Data Only Radio
EGPRS Enhanced GPRS
ERTMS European Rail Traffic Management System
ETCS European Train Control System
ETSI European Telecommunication Standardisation Institute
GMM GPRS Mobility Management
GPRS General Packet Radio Service
GSM Global System Mobile
GSM-R lobal System for Mobile - Railways
HLR Home Location Register
IMEI International Mobile Equipment Identifier
IP Internet Protocol
ITU-T International Telecommunication Union - Telecommunications Standardization Sector
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8 ETSI TS 103 368 V1.2.1 (2021-06)
ME Mobile Equipment
MOC Mobile Originated Call
MSISDN Mobile Station International Subscriber Directory Number
MT Mobile Termination
NCH Notification CHannel
PDP Packet Data Protocol
PLMN Public Land Mobile Network
PPP Point to Point Protocol
PS Packet Switched
QoS Quality of Service
RTS Ready To Send
SGSN Serving GPRS Support Node
SIM Subscriber Identity Module
TA Terminal Adaptor
TA/TE Terminal Adapter / Terminal Equipment
TE Terminal Equipment
UE User Equipment
VBS Voice Broadcast Service
VGCS Voice Group Call Service
4 General requirements for AT commands
4.1 AT command syntax
4.1.1 Alphabet
Clause 5.1 of Recommendation ITU-T V.250 [2] shall apply.
4.1.2 Command Lines
Clause 5.2 of Recommendation ITU-T V.250 [2] shall apply.
4.1.3 Basic Syntax Commands
Clause 5.3 of Recommendation ITU-T V.250 [2] shall apply.
4.1.4 Extended Syntax Commands
Clause 5.4 of Recommendation ITU-T V.250 [2] shall apply.
4.1.5 Issuing Commands
Clause 5.5 of Recommendation ITU-T V.250 [2] shall apply.
4.1.6 Executing Commands
Clause 5.6 of Recommendation ITU-T V.250 [2] shall apply.
4.1.7 MT Responses
MT Responses shall be as defined in clause 5.7 of Recommendation ITU-T V.250 [2] with the exception of
DIALTONE and NO ANSWER result codes which are not applicable.
ETSI

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9 ETSI TS 103 368 V1.2.1 (2021-06)
4.2 TE-TA interface commands
4.2.1 Escape code character used to switch from Online Data state to
Online Command state: S2
Description and Operation
S2 register defines the character used to build the escape sequence to exit from online data state and return to command
state or online command state. The escape sequence is built by repeating three time the escape character defines by the
S2 register (e.g. if the escape character is '+ ', the escape sequence will be "+++").
The escape character code shall be comprised between 0 and 127. Values from 128 to 255 are reserved to disable the
escape sequence mechanism.
Define value:
S2=0.127 Define
...