Specifications

Chapter 2 – At Command Features
Multi-Tech Systems, Inc. CDMA AT Commands Reference Guide (PN S000294K) 13
Chapter 2 – AT Command
Features
Serial Interface Settings
A module serial interface is set with the following default values (factory settings):
115,200bps
8 bits data
1 stop bit
no parity
RTS/CTS flow control.
Note: Some models may have a different value for the default baud rate.
The +IPR, +IFC and +ICF commands can be used to change these settings, if required. Changes made using these
commands become effective immediately following the transmission of the successful command result (OK).
Command Line
Commands always start with AT (which means ATtention) and finish with a <CR> character.
For example:
ATI3<cr> Display the model and software revision information.
AT+CGSN<cr> Display the electronic serial number (ESN).
AT+CMEE=1<cr> Enable extended AT command results.
ATD5551212<cr> Initiate a voice call.
Information Responses and Result Codes
Command responses start and end with <cr><lf>, unless the ATV0 (DCE response format) and the ATQ1 (result code
suppression) commands have been entered.
• If the command has been performed successfully, an OK is returned following any command-related output.
• If command syntax is incorrect, an ERROR string is returned.
• If extended error reports are enabled (+CMEE), the +CME ERROR: <Err> or +CMS ERROR: <SmsErr> strings
are returned with different error codes. Refer to the appendix for a definition of error codes and their meanings.
• If the command line has been performed successfully, an OK string is returned.
• In the following examples <CR> and <CR><LF> are intentionally omitted.