Lenovo 4218, 4155, 4158 manual Appendix A. Manual modem commands, Basic AT commands

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Appendix A. Manual modem commands

The following section lists commands for manually programming your modem.

Commands are accepted by the modem while it is in Command Mode. Your modem is automatically in Command Mode until you dial a number and establish a connection. Commands can be sent to your modem from a PC running communication software or any other terminal devices.

All commands sent to the modem must begin with AT and end with ENTER. All commands can be typed in either upper or lower case, but not mixed. To make the command line more readable, spaces can be inserted between commands. If you omit a parameter from a command that requires one, it is just like specifying a parameter of 0.

Example:

ATH [ENTER]

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.

 

 

 

D_

 

0 - 9, A-D, # and *

 

 

 

 

L

last number redial

 

 

 

 

P

pulse dialing

 

 

 

 

 

Note: Pulse dialing is not supported for

 

 

Australia, New Zealand, Norway, and South

 

 

Africa.

 

 

 

 

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 non-volatile

 

 

memory.

 

 

 

E_

E0

Commands are not echoed

 

 

 

 

E1

Commands are echoed

 

 

 

+++

 

Escape Characters - Switch from Data Mode

 

 

to Command Mode (T.I.E.S. Command)

 

 

 

H_

H0

Force modem on-hook (hang up)

 

 

 

© Copyright Lenovo 2009

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