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7.1 CPM structure
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7.1.1 General structure of a CPM PDU
A CPM is a PDU composed of one common ITS PDU header and multiple containers, which together constitute the CPM payload. ETSI ETSI TS 103 324 V2.1.1 (2023-06) 22 The general structure of a CPM is illustrated in Figure 7. Figure 7: General Structure of a CPM The component header is a common header for facility layer PDU...
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7.1.2 ITS PDU Header
The ITS PDU Header is a common header that includes the information of the protocol version, the message type and the ITS-S ID of the originating ITS-S. The ITS PDU header shall be included as specified in ETSI TS 102 894-2 [3]. Detailed data presentation rules of the ITS PDU header in the context of a CPM shall be as ...
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7.1.3 Management Container
The management container shall include the components referenceTime and referencePosition. For vehicle ITS-Ss, the reference position shall refer to the ground position of the centre of the front of the bounding box of the vehicle. The vehicle reference position is further detailed in ETSI EN 302 890-2 [4]. This positi...
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7.1.4 Originating Vehicle Container
The Originating Vehicle Container shall include the component orientationAngle. The vehicle orientation angle represents the actual orientation of the vehicle opposed to the vehicle heading which references the orientation of the provided velocity vector magnitude only, as depicted in Figure 8 and as defined in ETSI EN...
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7.1.5 Originating RSU Container
The Originating RSU Container may contain the component mapReference if a corresponding MAPEM [i.13] is being transmitted to ITS-S that receive the CPM, otherwise the component mapReference shall be omitted. If mapReference is used, either the IntersectionReferenceID or the RoadSegmentID component of the component mapR...
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7.1.6 Sensor Information Container
The Sensor Information Container shall list information about individual sensors or sensor systems which originated the perceived object information using the type SensorInformation. SensorInformation shall include the component sensorId. This identifier is in turn utilized in the PerceivedObjectContainer to connect in...
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7.1.7 Perception Region Container
A Perception Region Container shall list information about perception regions using the type PerceptionRegion. PerceptionRegion shall include the components measurementDeltaTime, perceptionRegionConfidence and perceptionRegionShape for a specific perception region. A PerceptionRegion can be used to indicate a perceptio...
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7.1.8 Perceived Object Container
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7.1.8.1 General
The Perceived Object Container shall include the component numberOfPerceivedObjects, describing the total number of perceived objects contained in the LDM at the time of generating the CPM. Due to the message generation rules as specified in clause 6.1.1 and the associated object inclusion scheme, the number of include...
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7.1.8.2 Object ID and time management
An objectID shall be assigned to each detected object. This ID is taken from a range of allowed numbers and is maintained per object, as long as an object is perceived and new sensor measurements are assigned to the object and there is no pseudonym change. The range of allowed objectIDs is between 0 and 65535. A new ob...
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7.1.8.3 Kinematic and attitude state description
The full kinematic and attitude state of an object can be represented in a 13-dimensional kinematic and attitude space. The corresponding state vector can be written as: stateObj = $ , , , , , , , , , , , , , , , , (, '  with , ,  representing the position, velocity and acceleration com...
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7.1.8.4 Object dimensions and age
One or more of the components objectDimensionX, objectDimensionY, objectDimensionZ may be included for each object, indicating the size of the bounding box of the perceived object in each direction. The component objectAge may be included for each perceived object. If present, the objectAge shall reflect the time the o...
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7.1.8.5 Link to Sensor Information Container
The component sensorIdList may be included. If present, it shall contain a list of SensorInformation.sensorId values from the Sensor Information Container, corresponding to sensors that provided the measurement data.
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7.1.8.6 Object perception quality
A scalar-value indication about the overall information quality on a perceived object may be provided in the component objectPerceptionQuality. ETSI ETSI TS 103 324 V2.1.1 (2023-06) 31 The object characteristics contributing to the perception quality of an object first detected at time t=0, where t represents discrete ...
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7.1.8.7 Object classification
The component classification may be included for a perceived object to describe the class and associated subclass of a detected object. Several object classes and subclasses associated with a classification confidence level may be reported for the same object, if the disseminating ITS-S is not fully confident on the ob...
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7.1.8.8 Link to MAPEM
The component mapPosition may be included for a perceived object only if the Originating RSU Container is present in the CPM. If mapPosition is present, the component MapPosition.mapReference shall be absent and the component laneId or connectionId shall refer to the MAPEM referenced in the Originating RSU Container.
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7.2 CPM format specification
The CPM format shall be as specified in ASN.1 in Annex A of the present document. DEs and DFs that are not defined in the present document shall be imported from the common data dictionary ETSI TS 102 894-2 [3] as specified in Annex A. Detailed descriptions of all components of CPM are in Annex B of the present documen...
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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) b...
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2 References
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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 a...
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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 i...
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3 Definition of terms, symbols and abbreviations
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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
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3.2 Symbols
Void.
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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 Enhan...
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4 General requirements for AT commands
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4.1 AT command syntax
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4.1.1 Alphabet
Clause 5.1 of Recommendation ITU-T V.250 [2] shall apply.
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4.1.2 Command Lines
Clause 5.2 of Recommendation ITU-T V.250 [2] shall apply.
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4.1.3 Basic Syntax Commands
Clause 5.3 of Recommendation ITU-T V.250 [2] shall apply.
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4.1.4 Extended Syntax Commands
Clause 5.4 of Recommendation ITU-T V.250 [2] shall apply.
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4.1.5 Issuing Commands
Clause 5.5 of Recommendation ITU-T V.250 [2] shall apply.
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4.1.6 Executing Commands
Clause 5.6 of Recommendation ITU-T V.250 [2] shall apply.
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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 ETSI TS 103 368 V1.2.1 (2021-06) 9
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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 ...
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4.2.2 Command line termination character: S3
Description and Operation Clause 6.2.1 of Recommendation ITU-T V.250 [2] shall apply. The default value for operation on Railways shall be set to S3=13 (Carriage return). Implementation Mandatory.
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4.2.3 Response formatting character: S4
Description and Operation Clause 6.2.2 of Recommendation ITU-T V.250 [2] shall apply. The default value for operation on Railways shall be set to S4=10 (Line feed). Implementation Mandatory.
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4.2.4 Command echo: E
Description and Operation Clause 6.2.4 of Recommendation ITU-T V.250 [2] shall apply. The default value for operation on Railways shall be set to E1 (Echo enabled). Implementation Mandatory. ETSI ETSI TS 103 368 V1.2.1 (2021-06) 10
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4.2.5 Result code suppression: Q
Description and Operation Clause 6.2.5 of Recommendation ITU-T V.250 [2] shall apply. The default value for operation on Railways shall be set to Q0 (TA transmit result codes). Implementation Mandatory.
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4.2.6 TA response format: V
Description and Operation Clause 6.2.6 of Recommendation ITU-T V.250 [2] shall apply. The default value for operation on Railways shall be set to V1 (DCE transmits full headers and trailers and verbose response text). Implementation Mandatory. 4.2.7 Defines CONNECT result code format and dial tone and busy detection: X...
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4.2.8 Behaviour of circuit 109 DCD: &C
Description and Operation Clause 6.2.8 of Recommendation ITU-T V.250 [2] shall apply. The default value for operation on Railways shall be set to &C1 (Circuit 109 changes physical layer functions in accordance with the underlying DCE). Implementation Mandatory.
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4.2.9 Behaviour of circuit 108/2 DTR: &D
Description and Operation Clause 6.2.9 of Recommendation ITU-T V.250 [2] shall apply. The default value for operation on Railways shall be set to &D2 (Upon an on-to-off transition of circuit 108/2, the DTE instructs the underlying DCE to perform an orderly clear down of the call). ETSI ETSI TS 103 368 V1.2.1 (2021-06) ...
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4.2.10 Data rate command at which the DCE will accept commands: +IPR
Description and Operation Clause 6.2.10 of Recommendation ITU-T V.250 [2] shall apply. The default value for operation on Railways shall be set to +IPR=9 600. NOTE: The Railway application may have to increase it to a value equal or higher to 19 200 in case of PS-mode operation.
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4.2.11 DTE-DCE character framing: +ICF
Description and Operation Clause 6.2.11 of Recommendation ITU-T V.250 [2] shall apply. The default value for operation on Railways shall be set to +ICF=3 (Sets 8 data bit, no parity, 1 stop bit). Implementation Mandatory.
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4.2.12 Select DTE-DCE flow control mechanism: +IFC
Description and Operation Clause 6.2.12 of Recommendation ITU-T V.250 [2] shall apply. The default value for operation on Railways shall be set to +IFC=2,2 (Hardware (based on RTS and CTS) flow control mechanism enabled). NOTE: The default value for the operation on Railways is similar of the use of the former command ...
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4.3 Result Codes
Table 1 shows the most important result codes, in the call control procedures and during the ME status change: (Information). Result Codes are described in table 1. More details can be found in clause 5.7 of Recommendation ITU-T V.250 [2] and in ETSI TS 127 007 [1] and annex B of ETSI TS 127 007 [1]. Table 1: Result Co...
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4.4 General commands
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4.4.1 Request manufacturer identification: +CGMI
Description and Operation This command allows to get a text string to identify the manufacturer of the MT. This text string and its content is set up at the sole discretion of the manufacturer. Clause 5.1 of ETSI TS 127 007 [1] shall apply. Implementation Mandatory.
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4.4.2 Request model identification: +CGMM
Description and Operation This command allows to get a text string to identify the model of the MT. This text string and its content is set up at the sole discretion of the manufacturer. Clause 5.2 of ETSI TS 127 007 [1] shall apply. Implementation Mandatory.
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4.4.3 Request revision identification: +CGMR
Description and Operation This command allows to get a text string to identify the version, revision level or date of the MT. This text string and its content is set up at the sole discretion of the manufacturer. Clause 5.3 of ETSI TS 127 007 [1] shall apply. Implementation Mandatory. ETSI ETSI TS 103 368 V1.2.1 (2021-...
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4.4.4 Request product serial number identification: +CGSN
Description and Operation This command allows to get a text string to identify the serial number of the MT. This text string and its content is set up at the sole discretion of the manufacturer but shall at least include the IMEI of the MT. Clause 5.4 of ETSI TS 127 007 [1] shall apply. Implementation Mandatory.
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5 AT Commands for voice and CS
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5.1 Call control commands and methods
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5.1.1 Automatic answer: S0
Description and Operation Clause 6.3.8 of Recommendation ITU-T V.250 [2] shall apply. If the implementation is mandatory, the default value for operation on Railways shall be set to S0=1 (ME answers after the first ring). Implementation Mandatory for all except EDOR.
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5.1.2 Dial command: D
Description and Operation Clause 6.2 of ETSI TS 127 007 [1] and clause 6.3.1 of Recommendation ITU-T V.250 [2] shall apply. The Dial command (ATD) instructs the MT to originate a call (see table 2). Table 2: ATD Responses Command Possible Responses D [<dial_string>] CONNECT <data rate> NO CARRIER ERROR BUSY OK The resu...
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5.1.3 Call clearing: H
Description and Operation Clause 6.3.6 of Recommendation ITU-T V.250 [2] shall apply. The Hook Control (ATH) command instructs the MT to clear the call. Implementation Mandatory.
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5.1.4 Select bearer service type: +CBST
Description and Operation The MT shall be capable of selecting the GSM-R bearer services used by ETCS application in conformity to clause 6.7 of ETSI TS 127 007 [1]. Set command selects the bearer service <name> with data rate <speed> and the connection element for mobile originated calls (see table 4). Table 4 :+CBST ...
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5.1.5 Radio link protocol: +CRLP
Description and Operation If the command is implemented, clause 6.8 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.1.6 Extended error report: +CEER
Description and Operation If the command is implemented, clause 6.10 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.1.7 Cellular result codes: +CRC
Description and Operation If the implementation is mandatory, clause 6.11 of ETSI TS 127 007 [1] shall apply. The default value for operation on Railways shall be set to +CRC=0 (Disabled extended format cellular result codes). Implementation Mandatory for all except EDOR.
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5.2 Network service related commands
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5.2.1 Subscriber number: +CNUM
Description and Operation Clause 7.1 of ETSI TS 127 007 [1] shall apply. Action command returns the subscriber MSISDN stored in the EFMSISDN in the SIM Card. Implementation Mandatory. ETSI ETSI TS 103 368 V1.2.1 (2021-06) 17
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5.2.2 Network registration: +CREG
Description and Operation This command enables the presentation of an unsolicited result code +CREG: <stat> when <n>=1 and there is a change in the ME network registration status. Clause 7.2 of ETSI TS 127 007 [1] shall apply. In the case that the ME deregisters from the GSM-R network, an unsolicited +CREG : <stat> res...
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5.2.3 PLMN selection: +COPS
Description and Operation Clause 7.3 of ETSI TS 127 007 [1] shall apply with the restrictions concerning the modes which shall be as specified in the present document. The MT shall select the last mode used, as the default mode, at every switch-on, as specified in ETSI TS 122 011 [4], clause 3.2.1. Manual (1) and Autom...
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5.2.4 Facility lock: +CLCK
Description and Operation If the command is implemented, clause 7.4 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.2.5 Change password: +CPWD
Description and Operation If the command is implemented, clause 7.5 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.2.6 Calling line identification presentation: +CLIP
Description and Operation If the command is implemented, clause 7.6 of ETSI TS 127 007 [1] shall apply. The default value for operation on Railways shall be set to +CLIP=0 (CLIP disabled). ETSI ETSI TS 103 368 V1.2.1 (2021-06) 18 Implementation Mandatory for all except EDOR.
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5.2.7 Calling line identification restriction: +CLIR
Description and Operation If the command is implemented, clause 7.7 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.2.8 Connected line identification presentation: +COLP
Description and Operation If the command is implemented, clause 7.8 of ETSI TS 127 007 [1] shall apply. The default value for operation on Railways shall be +COLP=0 (COLP disabled). Implementation Mandatory for all except EDOR.
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5.2.9 Call forwarding number and conditions: +CCFC
Description and Operation If the command is implemented, clause 7.11 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.2.10 Call waiting: +CCWA
Description and Operation If the command is implemented, clause 7.12 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.2.11 Call related supplementary services: +CHLD
Description and Operation If the command is implemented, clause 7.13 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.2.12 Unstructured supplementary service data: +CUSD
Description and Operation If the command is implemented, clause 7.15 of ETSI TS 127 007 [1] shall apply. ETSI ETSI TS 103 368 V1.2.1 (2021-06) 19 Implementation Optional.
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5.2.13 List current calls: +CLCC
Description and Operation If the command is implemented, clause 7.18 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.2.14 User to user signalling service 1: +CUUS1
Description and Operation If the command is implemented, clause 7.26 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.2.15 Answer: A
Description and Operation Clause 6.3.5 of Recommendation ITU-T V.250 [2] shall apply. The Answer a Call (ATA) command instructs the MT to immediately connect to the line and start the answer sequence. Implementation Mandatory.
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5.3 Mobile termination control and status commands
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5.3.1 Enter PIN: +CPIN
Description and Operation If the command is implemented, clause 8.3 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.3.2 Signal quality: +CSQ
Description and Operation Clause 8.5 of ETSI TS 127 007 [1] shall apply. Implementation Mandatory. ETSI ETSI TS 103 368 V1.2.1 (2021-06) 20
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5.3.3 Restricted SIM access: +CRSM
Description and Operation Action command and response allows to create an ordered list comprising MCC/MNC and alphanumeric network names for all networks read from the EFGsmrPLMN in the SIM Card. Clause 8.18 of ETSI TS 127 007 [1] shall apply. Implementation Mandatory.
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5.3.4 Automatic time zone update: +CTZU
Description and Operation If the command is implemented, clause 8.39 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.3.5 Time zone reporting: +CTZR
Description and Operation If the command is implemented, clause 8.40 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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5.3.6 Phone activity status: +CPAS
Description and Operation Clause 8.1 of ETSI TS 127 007 [1] together with the restrictions defined is the present document shall apply. Execution command returns the activity status <pas> of the ME. It can be used to interrogate the ME before requesting action from the phone. Possible <err> values are described in clau...
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5.4 Mobile termination errors
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5.4.1 Report mobile termination error: +CMEE
Description and Operation Clause 9.1 of ETSI TS 127 007 [1] shall apply. Implementation Mandatory.
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5.4.2 Mobile termination error result code: +CME ERROR
Description and Operation Clause 9.2 of ETSI TS 127 007 [1] shall apply. The default value for operation on Railways shall be set to +CMEE=1 (Presentation of result code enabled). Implementation Mandatory.
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6 AT commands for Packet Switched services
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6.1 General
This clause lists commands that a TE can use to control a MT supporting packet switched services. Functional aspects to support packet switched data services by a MT are described in ETSI TS 127 060 [i.1]. 6.2 Commands specific to MTs supporting the packet Switched services
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6.2.1 Define PDP context: +CGDCONT
Description and Operation If the command is implemented, the command "+CGDCONT" according to ETSI TS 127 007 [1], clause 10.1.1 shall be used to define the packet data protocol (PDP) parameters. Implementation Mandatory for EDOR and PS operation. ETSI ETSI TS 103 368 V1.2.1 (2021-06) 22
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6.2.2 3G Quality of service profile (requested): +CGEQREQ
Description and Operation If the command is implemented, applicable bearer service QoS parameter(s) shall be requested by using the command "+CGEQREQ" as defined in clause 10.1.6 of ETSI TS 127 007 [1]. Implementation Mandatory for EDOR and PS operation.
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6.2.3 3G quality of service profile (negotiated): +CGEQNEG
Description and Operation If the command is implemented, in order to verify the negotiated bearer service QoS parameter per PDP context, the command "+CGEQNEG" shall be used as defined in clause 10.1.8 of ETSI TS 127 007 [1]. Implementation Mandatory for EDOR and PS operation.
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6.2.4 PS attach or detach: +CGATT
Description and Operation If the command is implemented, it is used to enable the access towards GSM PS-mode mobility management node (SGSN), the command "+CGATT" as defined in clause 10.1.9 of ETSI TS 127 007 [1] shall be used. +CGATT parameter command syntax is shown in table 6. Table 6: +CGATT parameter command synt...
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6.2.5 Automatic attachment to the PS network: +RCGATT
Description and Operation This command enables the automatic PS-mode to attach in a home or visiting network when the MT detects the support of PS-mode bearer service i.e. GPRS/EGPRS. The read command returns the current automatic Packet Domain service state. The test command is used for requesting information on the s...
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6.2.6 PDP context activate or deactivate: +CGACT
Description and Operation If the command is implemented, to enable the data exchange between the Mobile and the applicable packet data network, the packet data protocol session (PDP context) shall be established by using the command "+CGACT" as defined in clause 10.1.10 of ETSI TS 127 007 [8]. Implementation Mandatory ...
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6.2.7 PDP context modify: +CGCMOD
Description and Operation The command "+CGCMOD" can be used to modify the specified PDP context (s) with respect to a changed QoS profile related to context ID (cid). It requires a change of the QoS parameters using the "+CGEQREQ". In this case, "+CGEQREQ" command has to be executed before the "+CGCMOD" command. The Qo...
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6.2.8 Enter data state: +CGDATA
Description and Operation If the command is implemented, to establish the communication between the TE and the MT, the command "+CGDATA" as defined in clause 10.1.12 of ETSI TS 127 007 [1] shall be used. The default values for operation on Railways for: • <L2P> shall be "PPP", Point-to-point protocol for a PDP such as ...
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6.2.9 Show PDP address(es): +CGPADDR
Description and Operation The command returns a list of PDP addresses for the specified context identifiers. If the command is implemented, clause 10.1.14 of ETSI TS 127 007 [1] shall apply. Implementation Optional.
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6.2.10 GPRS mobile station class: +CGCLASS
Description and Operation If the command is implemented, to select the appropriate mobile class the command "+CGCLASS" according to ETSI TS 127 007 [1], clause 10.1.17 shall be used. The default value for operation on Railways for <class> (a string parameter which indicates the mode of operation) shall be B. NOTE: <cla...
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6.2.11 Packet domain event reporting: +CGEREP
Description and Operation This command enables or disables sending of unsolicited result codes, +CGEV: XXX. If the command is implemented, ETSI TS 127 007 [1], clause 10.1.18 shall apply. Implementation Optional. ETSI ETSI TS 103 368 V1.2.1 (2021-06) 25