scope:

The present document specifies a profile of AT commands and recommends that this profile be used for controlling Mobile Equipment (ME) functions and GSM 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.25ter [14]. The present document has also the syntax details used to construct these extended GSM commands. Commands from ITU-T Recommendation V.25ter [14] and existing digital cellular standard (TIA IS-99 [15] and TIA IS-135 [16] are used whenever applicable. Some of the new commands are defined in such a way that they can be easily applied to ME of networks other than GSM. ITU-T T.31 [11] and T.32 [12] fax AT commands may be used for GSM fax transmission from TE. GSM Short Message Service AT commands are defined in GSM 07.05 [24]. GPRS AT commands are defined in clause 10 of the present document. The present document assumes an abstract architecture comprising a TE (e.g. a computer) and a ME interfaced by a TA. The span of control of the defined commands should allow to handle any physical implementation that this abstract architecture may lead to:

- TA, ME and TE as three separate entities;

- TA integrated under the ME cover, and the TE implemented as a separate entity;

- TA integrated under the TE cover, and the ME implemented as a separate entity;

- TA and ME integrated under the TE cover as a single entity.