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Chapter 1 – Introduction
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 9
Chapter 1 – Introduction
Scope of This Document
This document describes the AT-command based messages exchanged between an application and the Multi-Tech Systems,
Inc. products in order to manage GSM-related events or services.
Related Documents
This interface specification is based on the following recommendations:
[1] ETSI GSM 07.05: Digital cellular telecommunications system (Phase 2);
Use of DTE-DCE interface for Short Message Service (SMS) and Cell Broadcast Service (CBS)
[2] ETSI GSM 07.07: Digital cellular telecommunications system (Phase 2);
AT command set for GSM Mobile Equipment (ME)
[3] ITU-T Recommendation V.25 ter: Serial asynchronous automatic dialing and control
[4] ETSI GSM 03.40: Digital cellular telecommunications system (Phase 2);
Technical implementation of the Short Message Service (SMS) Point-to-Point (PP)
[5] ETSI GSM 03.38: Digital cellular telecommunications system (Phase 2);
Alphabets and language-specific information
[6] ETSI GSM 04.80: Digital cellular telecommunications system (Phase 2):
Mobile radio interface layer 3, Supplementary service specification, Formats and coding
Definitions
The words, “Mobile Station” (MS) or “Mobile Equipment” (ME) are used for mobile terminals supporting GSM services.
Terminal Equipment (TE) is the Man-Machine Interface of a GSM device (modem or handset). A TE can be a hanset
MMI or the AT Command interface.
A call from a GSM mobile station to the PSTN is called a “mobile originated call” (MOC) or “outgoing call”, and a call
from a fixed network to a GSM mobile station is called a “mobile terminated call” (MTC) or “incoming call”.
In this document, the word “product” refers to any Multi-Tech product supporting the AT commands interface.