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Chapter 1 – Introduction

CDMA 1xEV-D0 AT Commands Reference Guide (Document S000482B) 7

Chapter 1 – Introduction

Document Structure

Following this introduction is a section on basic elements important to understanding and communicating with the

modem. This includes discussions of the QNC (Quick Net Connect) call setup process and interaction with the

CDMA Interworking Function (IWF), as well as notes on the connection between the host (DTE) and the Wireless

modem (DCE).

The document then presents the commands, registers, result codes, and defaults provided in the command state

of the modem.

Commands are often termed AT commands since this character sequence (originated by Hayes™) is used to

prefix each specific command.

In addition to the commands, the definitions and use of status registers are also described.

Commands are referenced in strict alphabetical order. This facilitates searches for the syntax, parameters, and

operation of specific commands. To help locate whether or not a command exists to perform a desired function,

tables organize the commands into these groups:

• Basic modem operation actions – commands that make the modem execute an immediate action,

such as dialing, or restoring settings.

• Basic modem configuration – settings governing the modem’s behavior when executing basic

operations.

• Advanced modem configuration – settings governing the modem’s behavior related to advanced

operations (for example, Mobile IP).

• Account activation and management commands.

• Device and service interrogation commands – commands to determine the services available,

information about and the status of the modem.

• Voice operation – related to configuring, making, and controlling voice calls.

• SMS operations – commands to check, receive, and delete, incoming messages, and to originate

outgoing messages.

• GPS – commands (See Universal IP AT Commands Guide).

In addition to the commands, the definitions and use of status registers are also described. The factory / reset

defaults are listed in a separate table.

Result codes, both numeric and verbose, are provided in a separate table.

Extended Cellular Result Codes are also listed separately.

Conventions

The following format conventions are used in this reference.

Character codes or keystrokes that are described with words or standard abbreviations are shown within angle

brackets using a different font: such as <CR> for Carriage Return and <space> for a blank space character.

Numeric values are decimal unless prefixed as noted below.

Hexadecimal values are shown with a prefix of 0x, i.e. in the form 0x3D.

Binary values are shown with a prefix of 0b, i.e. in the form 0b00111101.

Command and register syntax is noted using an alternate font: !DSMS=<i>[,m].

The "AT" characters are not shown, but must be included before all commands except as noted in the reference

tables.

Characters that are required are shown in uppercase; parameters are noted in lowercase. Required parameters

are enclosed in angle brackets (<i>) while optional parameters are enclosed within square brackets ([m]). The

brackets are not to be included in the command string.

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