At Command Set - ActionTec 56K USB Call Waiting Modem User Manual

AT Command Set

There may be times when you need to access the modem manually with AT com-
mands. These commands may be sent to your modem from a PC running commu-
nications software such as Hyper Terminal.
Command Format
All commands must begin with the AT prefix, followed by the parameter and
ending with the ENTER key. All commands may be typed in either upper or
lower case, but not mixed. A command without any parameters will be consid-
ered as specifying the same command with a parameter of "0". The maximum
command length is eight (8) characters. The modem does not count the AT prefix,
carriage returns, or spaces.
Example: ATH [ENTER]
This command causes your modem to hang up.
Basic AT Commands
In the following listings, all default settings are printed in bold text.
Command
A/
A
D
P
T
En
E0
E1
Hn
H0
H1
Ln
L0
L1
L2
L3
Function
Repeat last command. Do not precede A/ with
AT or follow with ENTER
Answer
Dial command
Select pulse dialing; affects current and subsequent dialing
Select tone dialing; affects current and subsequent dialing
Command echo
Disables echo
Enables echo (default)
Switch hook Control
Hangs up the telephone line (default)
Picks up the telephone line
Speaker volume
Off or low speaker volume
Low volume
Medium volume (default)
High volume
23