ITU-T Recommendation V.250 [14] includes "Generic DCE Control" commands with the prefix +G. These commands are for the identification of the TA. Four of those commands are adapted here to be the identification commands of the MT. Syntax is otherwise similar, but the prefix is +CG. TIA IS-99 [15] uses same commands for base station identification.

Description Defined values Implementation

Description Defined values Implementation

Description Defined values Implementation

Description Defined values Informative examples Implementation

Description Defined values Implementation

Description Defined values Implementation

Description Defined values Implementation

PCCA STD-101 [17] includes a command to select the cellular network (Wireless Data Service; WDS) to operate with the TA. PCCA calls this WDS-Side Stack Selection. This command may be used when TA is asked to indicate the networks in which it can operate.

Description Defined values for Query Defined values for Set Implementation

Description Defined values Implementation

Description Defined values Implementation

When beginning to build a communication link, a general TE application controlling a TA needs to determine the TA and the MT to which it is connected. ITU-T Recommendation V.250 [14] has seven commands for TA identification from which four are mandatory to be implemented in a TA. An example of this command sequence requesting manufacturer (+GMI), model (+GMM), revision (+GMR) and serial number (+GSN) information would be: The maximum lengths of the information responses are defined to be 2048 characters, but it is recommended that they are kept as simple as in the example. The serial number command is defined as optional. Another optional command is Global Object Identification command (+GOI) which should return the object identifiers of ITU-T Recommendation X.208 as numeric strings delimited by periods. The Complete Capabilities List command (+GCAP) indicates the major capability areas of the TA. The support of different areas is presented in the response of +GCAP command. Each area can be presented by the selection command name of a specific capability area (e.g. +FCLASS for fax support) or some other predefined response. For instance, a GSM TA with fax capabilities could respond as follows: The first supported area in the response is presented with +CGSM. It is the response text to show that some or all GSM commands of the present document are supported. Second response text (+FCLASS) informs that some fax or voice capabilities are present, and the third text (+W) about the presence of wireless commands as specified by PCCA STD-101 [17]. Command +FCLASS=? (refer e.g. ITU-T Recommendation T.31 [11] and ) can be used to query the supported fax capabilities and +WS46=? to query the wireless data services available: The TA of this example supports GSM data services, and fax service class 1 (TIA-578-A), 2 (manufacturer specific) and 2.0 (ITU-T Recommendation T.32 [12] / TIA-592). The present document defines commands for MT identification which are similar to those for TA identification in ITU-T Recommendation V.250 [14], for an example: Manufacturer, model and version commands work similarly as for TA, except that the serial number query returns the International Mobile Station Equipment Identity (IMEI) number. IMEI is fifteen digits long and consists of a type approval code, a final assembly code, a serial number and a spare digit (refer TS 23.003). When the TA is implemented inside MT, the responses for both TA and MT queries will most likely follow the responses of MT identification.