Problem:
When user joins in Skype Call using voice bridge the VoIP dial-in users are disconnected.
Issue:
This Occurs because of the RTP time out has been set to 30.
RTP timeout disconnects the call when the user is not speaking , when the call is in Idle state.
Resolution:
Setting –> Chan SIP setting –> Media and RTP setting
Increase the RTP timeout 30 to 1000 and RTP Timeout 300 to 3000