Command Line Editing - The backspace can be used to edit a command line before it is

executed. The backspace key, (Control and H simultaneously on some systems), erases

the previous character in the command line. Register S5 allows the user to select a

character other than a backspace to edit the command line.

Re-Execute Last Command - The A/ command causes the modem to reexecute the last

command line. This is the only command which does not require the "AT" prefix.

Ommitted Parameters - Most commands include a parameter which determines how the

functions will be set. When the command parameter is omitted from the command string, it

is assumed to be a 0.

Escape Characters - A 3 character escape sequence maybe entered while in data mode to

switch the modem into command mode while on line. The escape character, set by Register

S2, must be entered 3 times in succession within a 1 second guard time to execute the

escape. The default escape sequence is "+++."

Result Codes - The modem issues a result code after each action. Result codes may be

provided as full words, numeric codes or may be disabled all together. Each result code

ends with a carriage return when numeric resul codes are chosen. When full word result

XE2476

XECOM\5

AT Command List

An asterisk indicates the factory default

A - Answer Command -

Bn - Select Communications Standard

n=0 Selects CCITT standards

n=1 Selects Bell standards*

D - Dial Command -

P = Pulse dial

T =

Tone dial

R =

Connect as an answering modem

W =

Wait for dial tone

,

=

Pause for the duration of S8

@ =

Wait for silence

!

=

Switch hook flash

;

=

Return to the command state

En - Command Echo

n=0 Do not echo commands

n=1 Enable command echo*

Hn - Switch Hook Control -

n=0 Switch hook relay closes*

n=1 The switch hook relay opens

In - Modem Identification

Ln - Speaker Volume -

n=0

Low speaker volume

n=1

Low speaker volume

n=2

Moderate speaker volume*

n=3

High speaker volume