Hi,
I set up a home voip phone system. I use ipkall and forward to voipdiscount and ring my cisco 7940. The problem is that the first incoming call will get busy signal. If the following incoming call is place within short of time, then the incoming call can ring the cisco 7940 phone. If there is no incoming call for a long time ( a few minutes), then the first incoming call will get busy signal again. Here is the link that I followed to setup my system.
http://afxa9.comxa.com/
Thanks!