Hi, I have one question wich can not explain. I'm using network recording type to record call, but when i try to sniff traffic with wireshark i can see srtp traffic instead rtp, and this is a little bit strange srtp traffic a can play stream in wires...

Hello.I have a nortel PBX connected to cisco 3745 via E1 channel. I has a one phone connected to PBX and one cisco IP phone connected to 3745 router. All phones are working properly. But when I try dial to cisco ip phone from nortel phone I see next:...