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5.2.25 Facility Confirmation Parameter
Facility Confirmation Parameter (struct) The purpose of the parameter facility confirmation parameter is to offer additional information concerning the message FACILITY_CONF. This parameter is coded depending on facility selector as a structure with following elements: Facility selector:
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5.2.26 Facility Indication Parameter
Facility Indication Parameter (struct) The purpose of the parameter facility indication parameter is to offer additional information con­cerning the message FACILITY_IND. This parameter is coded depending on facility selector as a structure with following elements: Facility selector: 0 reserved
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5.2.27 Facility Response Parameter
Facility Response Parameter (struct) The purpose of the parameter facility respond parameter is to offer additional information concerning the message FACILITY_RESP. This parameter is coded depending on facility selector as a structure with following elements: Facility selector:
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5.2.28 Flags
Flags (word) The purpose of the parameter flags is to exchange additional protocol dependent information about the data. Bit 0 qualifier bit Bit 1 more data bit Bit 2 delivery confirmation bit Bit 3 expedited data bit Bit 15 framing error bit, data may be invalid (only with corresponding B2 protocol) This information e...
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5.2.29 HLC
HLC (struct) reserved, shall be ignored This information element appears in: CONNECT_IND CONNECT_REQ
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5.2.30 Info
Info (word) The purpose of the parameter info is to provide error information to the application. For each error which can be detected by the controller a unique code is defined, independent from the con­text of the error. Profile B shall not generate other information values as defined below. In case of future extensi...
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5.2.31 Info Element
Info Element (struct) The purpose of the parameter info element depends on the value of the parameter info number. If the info number specifies an information element, the info element contains that information element with the coding as defined in ETS 300 102‑1 [15] / Q.931 [16]. If the info number specifies a chargin...
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5.2.32 Info Mask
Info Mask (dword) The parameter info mask specifies which type of information for a physical connection or controller shall be provided by Profile B. The selected information shall be indicated within the message INFO_IND to the application. A given info mask (set in LISTEN_REQ) is valid until it is superseded by anoth...
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5.2.33 Info Number
Info Number (word) The purpose of the parameter info number specifies the coding of the parameter info element and the type of information which is carried by this INFO_IND message. The high byte is structured as a bit field and indicates which type of information is held in the low byte. Bit 15 If this bit set to 1 th...
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5.2.34 LLC
LLC (struct) The purpose of the parameter Low Layer Compatibility (LLC) information element is to provide a means which should be used for compatibility checking by an addressed entity (e.g. a remote user or an inter working unit or a high layer function network node addressed by the calling user). The Low Layer Compat...
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5.2.35 Manu ID
Manu ID (dword) The purpose of the parameter Manu ID is to exchange a dword inside MANUFACTURER‑Messages which identifies the manufacturer. Every manufacturer offering MANUFACTURER‑Messages should choose a unique value (e.g. shortcut of company name). This information element appears in: MANUFACTURER_REQ MANUFACTURER_R...
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5.2.36 Manufacturer Specific
Manufacturer Specific The purpose of the parameter manufacturer Specific is to exchange manufacturer specific information. This information element appears in: MANUFACTURER_REQ MANUFACTURER_RESP MANUFACTURER_CONF MANUFACTURER_IND
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5.2.37 NCCI
NCCI (dword) The purpose of the parameter NCCI is to identify a logical connection. The NCCI is given by Profile B during creation of the logical connection. Depending on the layer 3 protocol selection (e.g. ISO 8208 [24]), it is possible to have multiple NCCIs based on one PLCI. The NCCI is a dword with a range from 1...
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5.2.38 NCPI
NCPI (struct) The purpose of the parameter NCPI is to provide additional protocol specific information. For the layer 3 protocols ISO 8208 [24] and X.25 the parameter data of structure NCPI are coded as follows: Byte 0 Bit field [0]: Enable the usage of the delivery confirmation procedure in call set‑up and data pack­e...
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5.2.39 PLCI
PLCI (dword) The purpose of the parameter PLCI is to describe a physical connection between two endpoints. The PLCI is given by Profile B during creation of the physical connection. The PLCI is a dword with the range from 1 to 255 (0 reserved), coded as described below, and additionally in­cludes the controller. Format...
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5.2.40 Reason
Reason (word) The purpose of the parameter reason is to provide error information to the application regarding the clearing of a physical connection . The defined values are: 0 normal clearing, no cause available; 0x3301 protocol error layer 1; 0x3302 protocol error layer 2; 0x3303 protocol error layer 3; 0x3304 anothe...
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5.2.41 Reason_B3
Reason_B3 (word) The purpose of the parameter reason is to provide error information to the application regarding the clearing of a logical con­nection . The defined values are: protocol independent: 0 normal clearing, no cause available; 0x3301 protocol error layer 1 (broken line or B channel removed by signalling pro...
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5.2.42 Reject
Reject (word) The purpose of the parameter reject is to define the action of Profile B for incom­ing calls. The defined values are
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6 GSM specific part of GSM‑API (addition to ETS 300 838profile A)
For further study.
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7 GSM specific part of GSM‑API (addition to ETS 300 838profile B)
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7.1 Overview
Clause 5 of this ETS contains the description of the part of GSM‑API, which is compatible to ETS 300 838 [14] Profile B (COMMON‑ISDN‑API). Following this approach, existing applications of this ETS are able to be used in a GSM environment. However, to use GSM specific features new GSM‑API applications need extensions t...
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7.2 GSM specific functionality
The following GSM specific functionality is offered by GSM‑API: Registration of GSM support: Support of GSM Tele and Bearer Services: ‑ Modem (usage of modem of the Inter Working Function); ‑ Telephony; ‑ Alternate speech fax (TS 61); ‑ Emergency Calls. Control of Short Message Service (SMS) and Cell Broadcast Servic...
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7.3 Extension mechanism
The extension of ETS 300 838 [14] profile B is done in two ways: 1) Some of the existing parameters of ETS 300 838 [14] profile B are extended by GSM specific values. These extensions are described in the subclause 5.1 of this ETS. 2) The FACILITY mechanism of ETS 300 838 [14] profile B will be used to extend this (ISD...
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7.4 Registration of GSM support
A function for the FACILITY mechanism of ETS 300 838 [14] profile B is defined to register GSM support:
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7.4.1 Register GSM support facility message parameter
Register GSM support The application uses this message to enable GSM functionality. The parameter "GSM Services" is a bit field, which is used to select the GSM services. If a GSM service is selected, the application has to be able to handle the asynchronous events, coming from the network side. The following rules app...
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7.5 Support of GSM Tele and Bearer Services
New CIP values are defined to handle the following tele/bearer services - modem calls (control of the modem of the Inter Working Function); - Support of Telephony; - Support of TS 61(Alternate Speech Fax); These new values are defined in subclause 5.1.1.4.
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7.5.1 Emergency Calls
According to GSM 02.30 [3], a GSM emergency call will be set up if the parameter Called Party Number of the CONNECT_REQ message is equal to "112".
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7.6 Basic GSM functions
Basic Functions defined for GSM‑API (Facility selector 256):
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7.6.1 Facility message parameter
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7.6.1.1 Send Short Messages
Send Short Messages The application uses this message to send a TPDU, which contains a Short Message (SMS‑SUBMIT‑REQUEST) or a SMS‑COMMAND. The destined Service Centre is defined by the Service Centre Address. The TP Message Reference of the Short Message which is placed within the TPDU is handled by GSM‑API. To handle...
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7.6.1.2 Receive Short Message
Receive Short Message This Message is used to handle delivered short messages and SMS‑STATUS‑REPORTS. If the application has selected the GSM service "Short Message Received Indication", only the class and the storage location of the message will be indicated. If the application has enabled the GSM service "Transfer of...
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7.6.1.3 Receive Cell Broadcast Messages
Cell Broadcast Messages These message are used to handle the Cell Broadcast service. With the request, the application can restrict the receipt of Cell Broadcast messages to a limited number of Message Identifiers (parameter MI list) or/and Data coding schemes (parameter DCS list). The indication is sent for each page ...
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7.6.1.4 In Call Modification
In Call Modification The application uses this message to send a Modify to the network. The CIP value is used, to create the GSM HLC and BC to be sent to the Network. The CIP value can be 16(Telephony) or 17(Fax). The In Call Modification Indication can be initiated by: - The result of a modify request, which can be a ...
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7.6.1.5 Read SIM Data
Read SIM Data The SIM data consists of transparent, linear fixed and cyclic files. GSM‑API offers a similar way to access all these types of files. Within the request, the application gives the identifier of the file. An immediate local confirmation is given and the result is sent within one or several indications. Th...
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7.6.1.6 Update SIM Data
Update SIM Data Using these messages, an application can update all types if files, (transparent linear fixed or cyclic files) of the SIM. In case of a linear fixed file, the application sends one request per record. The request contains the record number which may vary from 1 to 255 (according to GSM 11.11 [13]). When...
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7.6.1.7 Invalidate SIM file
Invalidate SIM file These messages are used to invalidate a file of the SIM according to GSM 11.11 [13]. After the request, the application receives a local confirmation. The result of the SIM is given in the subsequent indication for this function. Facility Request Parameter: Facility selector word 256: GSM Support Fu...
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7.6.1.8 Rehabilitate SIM file
Rehabilitate SIM file These messages are used to rehabilitate a file of the SIM according to GSM 11.11 [13]. After the request, the application receives a local confirmation. The result of the SIM is given in the subsequent indication for this function. Facility Request Parameter: Facility selector word 256: GSM Suppor...
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7.6.1.9 Get SIM File Status
Get SIM File Status These messages are used to get the status and additional information of a file. If the status of a dedicated file or of the main file is requested, the parameter SIM_EF_ID is empty. Facility Request Parameter: Facility selector word 256: GSM Support Function word 10 SIM_DF ID word directory, accordi...
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7.6.1.10 Handle PIN code
Handle PIN code The request to handle the PIN code offers different operations. For each operation, dependent of the value of parameter SIM PINOperation the other parameter have different meaning (all coded according to GSM 11.11 [13]): Facility Request Parameter: Facility selector word 256: GSM Support Function word 1...
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7.6.1.11 Get available PLMNs
Get available PLMNs With these messages the application requests a list of currently available GSM networks (PLMNs). For each PLMN additional information is given (if the PLMN is forbidden, allowed or if it is the PLMN the MS is currently registered on). In case of a rejection of the available PLMN request, this will b...
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7.6.1.12 Set PLMN Mode
Set PLMN Mode The application uses this message to select the mode of registration to a network. If the PLMN is not given, automatic mode is selected. In this case, the MS tries to register: 1) to the home PLMN. If this is not possible; 2) to one of the selected PLMN (given on the SIM). If this is not possible; 3) to a...
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7.7 GSM Supplementary Service functions
This subclause describes the extension of ETS 300 838 [14] profile B (COMMON‑ISDN‑API) to control GSM Supplementary Services. The ASN1 coder/decoder is placed below the GSM‑API.
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7.7.1 Overview
The extension for GSM Supplementary services offers the control of call independent and call related supplementary services. Only one SS transaction can take place in each direction at the same time. Whenever an application will try to start a second Mobile Originated SS transaction, it will be rejected with the info v...
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7.7.2 Enable GSM Supplementary Service Functionality
The Facility messages to "Register GSM Support are used to enable GSM supplementary services.
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7.7.3 GSM Supplementary Services Parameters
The following subclauses describe parameters, which are used in the Facility messages for GSM Supplementary Services. 7.7.3.1 ss_operation ss_operation (word) This parameter describes the content of the GSM Supplementary Services related Facility messages or the Info Element parameter in case of a GSM facility. Defined...
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7.7.3.2 Forwarding Feature
Forwarding Feature (struct) The forwarding feature contains an optional basic_service_code, optional ss_status, optional forw_to_num, optional forw_to_subadr and optional no_reply_cond_time. It appears in the forw_feat_list parameter of the FACILITY_CONF message (function 257 Mobile Originated SS transaction). Forwardi...
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7.7.4 Facility message parameter
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7.7.4.1 Restrict SS Information
Restrict SS Information This message is sent from the application to the protocol to restrict SS‑related information from the protocol to the application. If the protocol receives from the network information related to Basic Service Codes of the last request to restrict SS information , (e.g. "forw_feat" in the "forw_...
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7.7.4.2 Mobile Originated SS Transaction
Mobile Originated SS Transaction These messages are used to start and end a Mobile originated SS transaction. Facility Request Parameter: Facility selector word 256: GSM Support Function word 257 ss_ussd_string struct ss_ussd_coding_ scheme struct Byte 0 CellBroadcastDataCodingScheme as defined in GSM 03.38 [4] Facilit...
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7.7.4.3 Clear Mobile Originated SS Transaction
Clear Mobile Originated SS Transaction These messages are used to clear a Mobile originated SS transaction. Facility Request Parameter: Facility selector word 256: GSM Support Function word 258 Facility Confirmation Parameter: Facility selector word 256: GSM Support Function word 258
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7.7.4.4 Receive SS Message
Receive SS Message These messages are used to handle: 1) The spontaneous reception of an incoming SS transaction (Forward check indication). 2) The message transfer for unstructured SS data. Facility Indication Parameter: Facility selector word 256: GSM Support Function word 259 ss_operation word ss_code struct Byte 0 ...
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7.7.4.5 Call Hold
Call Hold These messages are used to handle the call related part of the Call Hold Supplementary service. The PLCI of the FACILITY messages describes the identifier of the call, which will be put on "Hold". Facility Request Parameter: Facility selector word 256: GSM Support Function word 260 Facility Confirmation Param...
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7.7.4.6 Call Retrieve
Call Retrieve These messages are used to handle the call related part of the Call Retrieve Supplementary service. The PLCI of the FACILITY messages describes the identifier of the call, which will be retrieved. Facility Request Parameter: Facility selector word 256: GSM Support Function word 261 Facility Confirmation P...
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7.7.4.7 Call Related Ussd
Call Related Ussd These messages are used to handle the Call Related Ussd Supplementary service. The PLCI of the FACILITY_REQ/CONF/IND/RESP messages describes the identifier of the call. Facility Request Parameter: Facility selector word 256: GSM Support Function word 262 ss_ussd_string struct Facility Confirmation Par...
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7.7.4.8 Receive Call Related Facility
Receive Call Related Facility These messages are used to receive the information of a call related facility. The related call is identified by the PLCI of the FACILITY_IND and FACILITY_RESP message. Facility Indication Parameter: Facility selector word 256: GSM support Function word 263 ss_operation word ss_code struct...
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7.8 Extended GSM functionality
This subclause defines additional functions for GSM‑API (Facility selector 256):
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7.8.1 Facility Message parameter
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7.8.1.1 Get Service State
Get Service State These messages are used, to get information of the current Service State. An application may use the request of this function to ask for the information. If the application asked for the GSM service "enable Service State indication", the indication of this function will be sent whenever the Service St...
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7.8.1.2 RX Level and RX Quality
RX Level and RX Quality These messages are used, to get information of the current receiving field strength and receiving quality. An application can only request for this information. An automatic indication is not defined. Facility Request Parameter: Facility selector word 256: GSM Support Function word 513 Facility ...
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7.8.1.3 Get SIM Present Info
Get SIM Presence Info These messages are used, to get information if the SIM card is physically present and ready for access. An application may use the request of this function to ask for the information. If the application asked for the GSM service "enable SIM presence indication", the indication of this function wil...
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0 UDI mode with ISO3309 HDLC framing. This is the default B1 protocol;
1 analogue mode;
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2 UDI mode without any additional framing;
3 reserved, shall be rejected; 4 fax G3 mode;
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5 UDI mode with ISO3309 HDLC framing (for compatibility to existing applications);
6 analogue mode (for compatibility to existing applications). protocol 0 and 5 shall establish an UDI connection where layer two frames additionally are encapsulated by an HDLC framing structure with byte stuffing according to ISO 3309. This sub parameter appears in parameter: B protocol
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1 Transparent;
2 SDLC [18]; 3 LAPD according Q.921 [19] for D channel X.25; 4 T.30 [20] for fax group 3; 5 Point to Point Protocol (PPP [21] [22]); 6 Transparent (ignoring framing errors of B1 protocol). This sub parameter appears in parameter: B protocol
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0 Transparent. This is the default B3 protocol;
1 T.90NL with compatibility to T.70NL according to T.90 Appendix II [23]; 2 ISO 8208 [24] (X.25 DTE‑DTE);
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3 X.25 DCE;
4 T.30 [20] for fax group 3. This sub parameter appears in parameter: B protocol
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4 For calls from the analogue network. (not necessary in GSM‑API)
17 For calls within ISDN. Non standard 64 kBit/s data applications 2 No checking of High Layer Compatibility information is provided. The application should verify that no High Layer Compatibility information is received. Non standard 56 kBit/s data applications 8 No checking of High Layer Compatibility information is ...
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1 DTMF (Dual Tone Multi Frequency);
256 GSM specific functions. GSM specific functions identified by this facility selector are described in clause 7. This information element appears in: FACILITY_REQ FACILITY_CONF FACILITY_IND FACILITY_RESP
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0 Parameter does not apply (coded as empty structure);
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1 DTMF (Dual Tone Multi Frequency):
DTMF digits byte array Received characters, coded as IA5‑char. "0" to "9", "*", "#", "A", "B", "C" or "D" This information element appears in: FACILITY_IND
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0 Parameter does not apply (coded as structure with a length of 0);
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0 Parameter does not apply (coded as structure with a length of 0)
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1 Parameter does not apply (coded as structure with a length of 0)
This information element appears in: FACILITY_RESP
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0 Accept the call;
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1 Ignore the call;
2 reject call, normal call clearing; 3 reject call, user busy; 4 reject call, requested circuit/channel not available; 5 reject call, facility rejected; 6 reject call, channel unacceptable; 7 reject call, incompatible destination; 8 reject call, destination out of order; 0x8xxx GSM‑API specific reason. Used only, if GS...
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1 Register GSM support
The facility message parameter for this function are described below.
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1 Register GSM Support (as described above);
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2 Send Short Message;
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3 Receive Short Message;
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4 Receive Cell Broadcast Message;
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5 In Call Modification;
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6 Read SIM Data;
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7 Update SIM Data;
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8 Invalidate SIM File;
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9 Rehabilitate SIM File;
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10 Get SIM File Status;
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11 Handle PIN code;
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12 Get available PLMNs;
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13 Set PLMN mode;
14 ‑ 255 reserved for basic GSM functions. The facility message parameter for these basic functions are described in the following subclauses.
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256 Restrict SS information;
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257 Mobile originated SS transaction;
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258 Clear Mobile originated SS transaction;
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259 Receive SS message;
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260 Call Hold;
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261 Call Retrieve;
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262 Call Ussd;
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263 Receive Call related Facility;
264 ‑ 511 reserved for GSM Supplementary Services functions;
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512 Get Service State;
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513 Get RX Level and RX Quality;
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514 Get SIM Presence Info;
515 ‑ ... reserved.