I am facing a strange problem with the disconnect. My voice setup is having an 1861 router with CME and 7942 IP Phones. The below given is how it has been configured,
# The Router has been integrated to PBX through 4 FXO ports
# Analog phones are terminated to 4 FXS ports
# 7942 IP phones are terminated to switch port on Router
# IP phones are configured using SIP protocol
Previously when it was in SCCP, the calls were getting disconnected. Now after i changed to SIP protocol, and when we are calling from a PBX extension to a phone connected to voice router, and before answering if we are disconnecting => the Analog phones connected to FXS port will get disconnected. But on the other hand IP phones will keep on ringing. If we are attending the call, then it will get disconnected when the phone goes on hool. Is this disconnect issue a bug in SIP or is there any change to be made in the configuration.
I am attaching the show run and the debug output along this post. Would really appreciate your valuable opinions.
Thanks in advacne