VoIP FAQS Ports

IPBRICK 6

SIP
5060/udp

RTP Audio
50000/udp a 55000/udp (when the IP PBX is connected to the Internet using eth0 as gateway)
55000/udp a 60000/udp (CAFE Phone webRTC2SIP)
60000/udp a 65000/udp (when the IP PBX is connected to the Internet using eth1 or other interface rather then eth0 as gateway - rtpproxy utilization)

RTP Fax T38
40000/udp a 45000/udp (when the IP PBX is connected to the Internet using eth0 as gateway)