I know when you read that subject everyone thinks NAT, but that isn't the case here. Incoming calls get 2 way audio, but outbound calls do not have incoming audio. below is the flow
callee --> asterisk --> firewall/router --> provider Callee is firewalled, but not NAT. callee is on the same subnet as the asterisk box. Asterisk box has been completely excluded from the firewall rules, and all traffic is being passed to it. Provider says everything is good on their end. Incoming calls work fine. Here is the config from sip.conf for the provider: [general] context=incoming srvlookup=yes canreinvite=no videosupport=yes qualify=yes ; trunk links [provider] type=friend nat=never host=123.123.123.123 disallow=all allow=ulaw dtmfmode=auto context=dids-inbound canreinvite=no Thanks Miles
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