I have a 2811 router which I configured as voice gateway. I have a sip trunk which connects me to a SIP server. My problem is that my router is sending invite request to the SIP server on port 5060 but from a random source port. The SIP server is always replying on 5060 so the communication is aboted.
Is there any way the enforce my router to send SIP invite from 5060 port.