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AT Command Set and S-Registers
Table 4-1. AT Command Reference (12 of 18)
AT
Command Description
\T n
Set Inactivity Timer
During a normal or reliable connection, this command forces
the modem to disconnect if no data is transmitted or received
within a specified time period.
\T0
\T1 – 90
\V n
Change Response Code Set
This command is used to select which modem response codes
are supported. Refer to Appendix C for more information.
\V0
\V1
\V2
\X n
XON/XOFF Passthrough Flow Control
If software flow control is enabled (\Q1), this command
determines whether XON and XOFF characters received from
the DTE are sent to the remote modem. In addition, if flow
control is enabled (\G1) in normal mode, the command
determines whether the XON and XOFF characters received
from the remote modem are sent to the DTE. In both cases,
flow control operation is not affected.
\X0
\X1
\Y
Reserved.
Reserved.
\Z
&C n
Data Carrier Detect (DCD) Control
This command controls the Data Carrier Detect signal.
&C0
&C1
Disable inactivity timer.
Length in minutes.
Enables Basic response codes (see Table C-2).
Enables Modified MNP response codes (see
Table C-3).
Enables Extended V.42 response codes
(see Table C-4).
Processes flow control characters and removes
them from the data stream.
Processes flow control characters and passes them
through to the local or remote modem to be processed
as characters.
State of carrier from the remote modem is ignored.
DCD is always on.
State of carrier from the remote modem is
tracked. DCD reflects the state of the received
carrier.
Issue 1 November 1994
4-13
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