3Com ISDN Modem manual 89

Changing the Parameter Settings 5-5

question mark (?) after the particular value. For example, to read the status of S register 63, you would type

AT S63?

and then press [Enter] or [Return].

After completing its tasks, the 3C882 ISDN modem sends a message to the screen followed by a result code. Refer to Appendix B for a complete list of result codes.

5To change another parameter setting, repeat steps 1 through 4. Otherwise, go on to Chapter 7,“Placing and Receiving Calls.”

Table 5-1 Changing Default Settings

Parameter	Default Value	To Change the Default
QuickSelect	Enabled (S71=0)	Send the command ATS71=1 to use Async-Sync
		PPP exclusively or ATS71=2 to use V.120 exclusively.
DBA	Enabled for both	Send the command ATS70=0 to disable DBA.
	incoming and
	outgoing calls
	(S70=3)
Auto Answer	Disabled (S0=0)	Send the command ATS0=(number of rings before
		the ISDN modem answers the call) to enable Auto
		Answer.
Compression	Enabled (%C2)	Send the command AT%C0 to disable compression.
Autobaud	Enabled ($B0)	Send the command AT$B (rate) to set a specific
		baud rate. Acceptable values are 1200, 2400, 4800,
		9600, 19200, 38400, 57600, 115200, and 230400.*
		Send the command AT$B0 to return to Autobaud.
		Autobaud does not exceed 115200. For 230400 you
		must send the command AT $B230400 to the ISDN
		modem.

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