3.3 Basic AT Commands

In the following listings, all default settings are printed

in bold text.

Command

Function

A

 

Manually answer incoming call

A/

 

Repeat last command executed. Do not precede

 

 

A/ with AT or follow with ENTER

AT

 

Appears at the beginning of every command

 

 

line

B_

B0

CCITT mode

 

B1

Bell mode

D_

 

0 - 9, A-D, # and *

 

P

pulse dialing

 

R

originate calls in answer mode

 

T

touch-tone dialing

 

W

wait for second dial tone

 

,

pause

 

@

wait for five seconds of silence

 

!

flash

 

;

return to Command Mode after dialing

DS=n

 

Dial one of the four telephone numbers (n=0-

 

 

3) stored in the modem’s non-volatile memory

E_

E0

Commands are not echoed

 

E1

Commands are echoed

+++TIES Escape Characters - Switch from Data Mode to Command Mode

H_

H0

Force modem on-hook (hang up)

 

H1

Force modem off-hook (make busy)

I_

I0

Display product-identification code

 

I1

Factory ROM ID

 

I2

Internal memory test

 

I3

Device ID

 

I4

Internal ID

L_

L0

Low speaker volume

 

L1

Low speaker volume

 

L2

Medium speaker volume

 

L3

High speaker volume

M_

M0

Internal speaker off

 

M1

Internal speaker on until carrier detected

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MaxTech V.42bis, V.32bis user manual Basic AT Commands