HOW PREMAN 69 CAN SAVE YOU TIME, STRESS, AND MONEY.

For anyone who is shedding audio mid-phone It really is highly not likely to be a firewall or port blocking issue. You can see the RTP ports truly used by looking at a capture on the SIP signalling, notably the SDP headers, try to find the "m=" header that give port number. You could have to resort to a Wireshark seize at your stop Along with the I