Viva Series, AT Commands 1817
Appendix G AT Commands
AT commands Hayes Microcomputer Products is a leading manufacturer of modems that has developed a
language called the AT command set for controlling digital cellular phones and modems. This
AT command set has become the de facto standard.
List of selected AT
commands
The characters in this table are the most commonly used AT commands when configuring a
digital cellular phone or modem. Refer to the manual of the used digital cellular phone or
modem for information on which AT commands to use.
AT command Description
~ Inserts a delay of 1/4 second.
^# Inserts the phone number as defined in digital cellular phone connection.
^^ Inserts character ^.
^C Bearer Service: Connection Element.
^M Inserts a carriage return and send command.
^S Bearer Service: Speed including Protocol and NetDataRate.
AT Starts a command line to be sent to phone.
AT&F[<value>] Sets the configuration parameters to default values specified by manufac-
turer of phone.
<value>:
• 0 = Factory default configuration profile
ATD<number> Starts a call to the phone number given as parameter. If “;” is present, a
voice call to the given number is performed.
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