3.3Basic AT Commands

In the following listings, all default settings are printed in bold text.

Command Function

AManually 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

CCITTmode

 

B1

Bell mode

 

B2

V.23 at 1200/75

 

B3

V.23 at 75/1200

C_

C0

Carrier always off

 

C1

Normal transmit carrier

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

F_

F0

Enables online echo

 

F1

Disables online echo

+++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

Reserved

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MaxTech PCI Internal Voice/FAX/Data/Speakerphone Modem user manual Basic AT Commands, Command Function, Bell mode, DS=n