Terminal Server User Guide, Version 3.3
119
Virtual Modem AT
Commands
Appendix A
A
Virtual Modem Initialization Commands
You can initialize the modem connection using any of the following commands:
Note:
Virtual Modem initialization commands are only supported on Terminal Server firmware
and configurators version 3.2 or higher.
Command
Description
Options
ATQn
Quite mode. Determines if result codes will be
sent to the connected terminal. Basic results
codes are OK, CONNECT, RING, NO
CARRIER, and ERROR.
Setting quite mode also suppresses the "RING"
message for incoming calls.
n=0, no result codes will be sent.
n=1, result codes will be sent.
(default)
ATVn
Verbose mode. Determines if result codes are
displayed as text or numeric values.
n=0, display as numeric values.
n=1, display as text. (default)
ATEn
Echo mode. Determines whether characters sent
from the serial device will be echoed back by
the Terminal Server when VModem is in
"command" mode.
n=0, disable echo.
n=1, enable echo. (default)
+++ATH
Hang up. This command instructs the Terminal
Server 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
controls the "auto answer" behavior.
In "manual" mode, the Terminal Server will not
accept incoming sessions until an ATA is issued
by the serial device. In "auto answer" mode, the
Terminal Server will automatically accept an
incoming connection request.
Register=0, sets "manual answer"
mode
Register=1-255, "auto answer"
mode (default)
