A

Virtual Modem AT

 

Commands

Appendix A

Virtual Modem Initialization Commands

Note: Virtual Modem initialization commands are only supported on IOLAN firmware and configurators version 3.2 or higher.

You can initialize the modem connection using any of the following commands:

Command

Description

Options

 

 

 

ATQn

Quite mode. Determines if result codes will be

n=0, no result codes will be sent.

 

sent to the connected terminal. Basic results

n=1, result codes will be sent.

 

codes are OK, CONNECT, RING, NO

(default)

 

CARRIER, and ERROR.

 

 

Setting quite mode also suppresses the "RING"

 

 

message for incoming calls.

 

 

 

 

ATVn

Verbose mode. Determines if result codes are

n=0, display as numeric values.

 

displayed as text or numeric values.

n=1, display as text. (default)

 

 

 

ATEn

Echo mode. Determines whether characters sent

n=0, disable echo.

 

from the serial device will be echoed back by

n=1, enable echo. (default)

 

the IOLAN when VModem is in "command"

 

 

mode.

 

 

 

 

+++ATH

Hang up. This command instructs the IOLAN to

 

 

terminate the current session and go into

 

 

"command" mode.

 

 

 

 

ATA

Answer call. Instructs the VModem to accept

 

 

connection requests. VModem will give the

 

 

terminal up to 3 minutes to answer the call. If

 

 

the ATA is not received within 3 minutes, all

 

 

pending sync messages will be discarded.

 

 

 

 

ATI0

Return the modem manufacturer name.

 

 

 

 

ATI3

Return the modem model name.

 

 

 

 

ATS0

Sets the value of the S0 register. The S0 register

Register=0, sets "manual answer"

 

controls the "auto answer" behavior.

mode

 

In "manual" mode, the IOLAN will not accept

Register=1-255, "auto answer"

 

incoming sessions until an ATA is issued by the

mode (default)

 

serial device. In "auto answer" mode, the

 

 

IOLAN will automatically accept an incoming

 

 

connection request.

 

 

 

 

IOLAN DS1/TS2 User’s Guide, Version 4.5

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Perle Systems TS2, DS1 manual Virtual Modem Initialization Commands

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