i'm testing bladeware vs. cisco gw. If i try fax trough t.37 all is fine. But if i send fax through t.38, i have trouble with ports.
First is opened RTP stream and then is negotiated fax transmition with t38. All is fine, but my gw chose new port for this communication stream, send it in SDP(packet no.481) to the fax machine, but is still listening on the old port for t38. Every time if fax machine try to communicate to the new port recieve message with destination unreachable.
I have pcap from bladeware and detail sip log from cisco gw. Can you help me?
I tried more ios, last was 12.424T4. But nothing.