3Com ISDN Modem manual T0 disables inactivity timer default, Displays connection speed, Reset AT Z

		AT Command Set	B-3
Table B-1 AT Command Set Summary (continued)
Command	Function (Example)	Description
Sn=	Write configuration register	Writes to a specific S register.
	(AT S60=64)
\S	Read on-line status: command	Reads the status of any parameters that
	settings (AT \S)	have been modified through AT
		commands and provides call status
		information.

\T Link inactivity timer (AT \T1)

V Result code format (AT V0)

\T0 disables inactivity timer (default).

\Tn link inactivity timer in minutes. The ISDN modem automatically disconnects the call if no activity is sensed within n (n = 0–255) minutes.

V0 enables short form result codes.

V1 enables long form result codes (default).

%V	Show version number (AT %V)	Displays ISDN modem firmware version.
W	Displays connection speed	W0 displays COM port rate only (default)
		W1 displays COM port and ISDN data rate
		W2 displays ISDN data rate only
&W	Stores configuration (AT &W)	Stores the configuration of all S registers
		that are not part of the ISDN modem
		initial configuration set.
Z	Reset (AT Z)	Disconnects all calls in progress and
		performs a complete ISDN modem
		system reset.
+++	Enter command state	Causes ISDN modem to enter the
		command state if it is currently in the
		on-line state.

* To access the Configuration dialog box, the baud rate must be set to Autobaud.