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

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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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Contents Contents Hardware Installation Unpacking Your ModemSoftware Installation/Configuration Fasten the retaining bracketPage COM Port and Interrupt Settings Devices in your computer cannot share an IRQ withTesting Your Modem After Installation Using Your ModemCommand Structure Where To Go From HereExecuting Commands Basic AT Commands Extended AT Commands Mode after DTR toggle Guard tone disabledForce DSR Signal High on Enable Trellis Coding @22bis auto-retrain disabled 22bis auto-retrain enabledEnable Auto Fall Forward/Back Disable Auto Fall Forward/BackFax Class 1 Commands Voice Mode Commands S Registers Function Range/units Default Basic Response Codes Modem dials but does not connect Modem does not respond to commandsModem does not dial Modem exhibits poor voice record or playback Modem makes a connection but no data appears on your screenHigh pitch tone is heard whenever you answer the phone FCC Compliance UartFCC Class B Statement DOC Compliance InformationDisclaimer, Copyright, And Other Notices Section One Introduction Software Installation/Configuration COM Port and Interrupt Settings Switch Block SW-1 Location Switch Block Settings Testing Your Modem After Installation Bold text Command Function Manually answer incoming call Ccitt modeOriginate calls in answer mode With AT or follow with EnterCommands are not echoed Resets modem after DTR toggle Recall factory default configurationToggle Hz guard toneMNP/V.42/V.42bis Commands \A3\Q3 Switch to reliable link from normal link Register Function Range/units Default S RegistersSection Five Result Codes Section Six Troubleshooting Modem does not dial Power 75 W Section Eight Support and Service DOC Compliance Information Disclaimer, Copyright, And Other Notices