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Chapter 1 – Introduction
The AT command set is one of the main interfaces for the modem to interact with an external application layer. CDMA AT
commands are defined in TIA/EIA/IS707.3. However, as the wireless applications increase, TIA/EIA/IS707.3 is not sufficient. In
addition, a lot of GSM applications already exist and GSM customers would like to maintain the same interface in order to
make no or minimum changes to the applications to be used with CDMA modem. To meet the all these needs, this CDMA AT
command set is designed to cover the following:
IS707.3 AT commands;
1.
GSM 07.07 when applicable;
2.
GSM 07.05 when applicable,
3.
ITU-T v25 when applicable;
4.
Proprietary AT set;
5.
Customer specific AT commands;
6.
Qualcomm defined AT commands.
7.
Please note that in several instances, the GSM 7.07 and 7.05 specifications could not be followed because of fundamental
differences between CDMA and GSM call processing behaviors. In these cases, minimal changes were made to the GSM-
related commands.
Scope of This Document
This document describes CDMA AT commands, their syntax, responses, and result codes. It serves as the reference for
wireless application development based on the CDMA modem and for its integration and testing. The intended audience is
expected to be familiar with CDMA data services protocol and AT modem commands.
Related References
This interface specification is based on the following recommendations or standards:
ETSI GSM 07.05: Digital cellular telecommunications system (Phase 2); Use of DTE-DCE interface for Short
1.
Message Service (SMS) and Cell Broadcast Service (CBS)
ETSI GSM 07.07: Digital cellular telecommunications system (Phase 2); AT command set for GSM Mobile Equipment
2.
(ME)
ITU-T Recommendation V.25 ter: Serial asynchronous automatic dialing and control
3.
ETSI GSM 03.40: Digital cellular telecommunications system (Phase 2); Technical implementation of the Short
4.
Message Service (SMS) Point-to-Point (PP)
ETSI GSM 03.38: Digital cellular telecommunications system (Phase 2); Alphabets and language-specific information
5.
ETSI GSM 04.80: Digital cellular telecommunications system (Phase 2): Mobile radio interface layer 3,
6.
Supplementary service specification, Formats and coding
TIA/EIA/IS-707.3: Data Service Options for Wideband Spread Spectrum Systems: AT Command Processing and the
7.
Rm Interface
IS-131: Data Transmissions Systems and Equipment – Extensions to Asynchronous Dialing and Control.
8.
TIA/EIA-592: Asynchronous Facsimile DCE Control Standard – Service Class 2.
9.
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J)
Chapter 1 – Introduction
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