ETSI - PRETS 300 642
Digital Cellular Telecommunications System (Phase 2); AT Command Set for GSM Mobile Equipment (ME)
|Publication Date:||1 November 1998|
This European Telecommunications Standard (ETS) 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 . This ETS has also the syntax details used to construct these extended GSM commands. Commands from ITU-T Recommendation V.25ter  and existing digital cellular standards (TIA IS-99  and TIA IS-135 ) are used whenever applicable. Some of the new commands are defined such way that they can be easily applied to ME of networks other than GSM. ITU-T T.31  and ITU-T T.32  fax AT commands may be used for GSM fax transmission from TE.
This ETS assumes an abstract architecture comprising a TE (e.g. a computer) and a ME interfaced by a TA (see figure 1). 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.