User Manual

Appendix C Hayes AT Command Reference

RFI-9256 Radio Modem User Manual Page 75 of 96

Appendix C Hayes AT Command Reference

C.1 Radio Commands

C.1.1 “AT?” Menu Mode

This command enables the menu system on the current Hayes port. When the menu is exited the radio will

return to AT command mode.

C.1.2 “ATD” Dial

This command dials a remote unit. The basic dialling command is:

ATD<address><extension>

Where

is the address of the remote unit, and

is the extension number to dial. For

a list of extension numbers see section 4.3.3.

Hyphens, spaces, and colons can be used to make the command more readable, however these will be

ignored by the radio. For example, the command

ATD30200001

is equivalent to

ATD 30-2000:01

Dial commands cannot be concatenated with other AT commands. More information can be found in the

section Connection Management on page 27.

C.1.3 “ATE” Echo

The echo command enables or disables the echoing of input characters in local command state.

Command Description

ATE0

Disable local command echo.

ATE1

Enable local command echo.

Table 22: ATE Echo commands

C.1.4 “ATH” Hang Up

The hang-up command forces the radio to terminate the current dial-up connection.

C.1.5 “ATI” Information

The information commands can be used to return various information about the radio. The list of commands

are shown in Table 23.

Command Description

ATI

Displays the firmware identifier.