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Phone line busy when dialing after 3 connects and 3 hang ups

Dec 1, 2011 at 3:32 PM


we are using DotRas to manage a GPRS connection of a mobile device running Windows XP embedded.  The GPRS connection is dialed if WLAN connections are not available and disconnect if a WLAN connection becomes available. This works fine, but only for the first three dials. Every successive connection attempt results in a DotRas.RasDialException: The phone line is busy.

Dialing the connection per Control Panel -> Network Connections always works fine.

The RasDialer used to dial the connection is always the same. Can anybody help?



Dec 2, 2011 at 10:51 AM

Reinstallation of the GPRS modem solved the problem, but the exact cause of the described problem is unknown.