You cannot modify the number of rings after which Dial-Up Networking Server answers incoming calls. Dial-Up Networking Server always answers incoming calls after one ring.

Because Dial-Up Networking Server answers incoming calls on the first ring, other fax and communications programs may be unable to answer incoming calls when Dial-Up Networking Server is installed and configured to allow caller access. To allow other fax or communications programs to answer incoming calls, disable Dial-Up Networking Server by configuring it not to allow caller access. To do so, follow these steps:

1.	Click the Start button, point to Programs, point to Accessories, and then click Dial-Up Networking.
2.	On the Connections menu, click Dial-Up Server.
3.	If only one modem is installed in Windows, skip to step 4. If more than one modem is installed, click the tab that corresponds to the modem being used with Dial-Up Networking Server.
4.	Click No Caller Access, and then click OK.

For information about other problems with Microsoft Fax and other communications programs that can be configured to answer incoming calls automatically that can occur when you use Dial-Up Networking Server, please see the following article in the Microsoft Knowledge Base: