14 min read
SIP and NAT explained: STUN, TURN, ICE, rport and SIP ALG
SIP NAT traversal explained: why NAT breaks SIP calls, how rport, STUN, TURN and ICE help, why SIP ALG hurts, and the Asterisk PJSIP settings.
NAT
Posts about NAT, newest first.
11 min read
One-way audio or no audio on VoIP calls: causes and step-by-step fixes
Fix one-way or no audio on VoIP calls by checking SDP addresses, SIP ALG, blocked RTP ports, symmetric RTP, codecs and hold, with captures and Asterisk fixes.