HP Pavilion Desktop xv886 PC User Manual

Page 3

Section Three - AT Command Set

Executing Commands

Your modem is in Command Mode upon power-on and is ready to receive and execute “AT"
commands. The modem remains in Command Mode until it makes a connection with a remote
modem.

AT Commands & Format

All commands must begin with the AT prefix, followed by the command letter and ended with the
ENTER key. All default settings are printed in bold text. Spaces are allowed in the command
string to increase command line readability but are ignored by the modem during command
execution. All commands may be typed in either upper or lower case, but not mixed. A command
issued without any parameters is considered as specifying the same command with a parameter
of “0”.

Example: ATL [ENTER]

This command causes your modem to lower its speaker volume.

Command

Function

Answer incoming call

Repeat last command. Do not precede A/ with AT
or follow with Enter.

CCITT mode@ 1200 bps

Bell mode @ 300/1200bps

0-9, A-D, # and *
L last number redial
P pulse dial
T tone dial
W wait for second dial tone
, pause
@ wait for five seconds of silence
! flash
; return to command mode after dialing
$ wait for AT&T “Bong” tone

E0 Echo

disabled

E1 Echo

enabled

+++

Switch from data mode to command mode

Modem goes on hook

Modem goes off hook

Returns default speed and controller firmware
version

ROM Checksum code

I2 ROM

Test

Returns default speed and controller firmware
version

Returns country code

Low speaker volume

Medium speaker volume

High speaker volume

Speaker always off

Speaker on until carrier detected