Been working with Asterisk for a long time but this is the first time I have
dealt with this issue.
I am setting up an Asterisk box (FreePBX not my choice) to interface with an
e911 provider.
They say their switches only listen for RTP on ports 2-21001 which is
outside the normal range
Hi Todd,
From my experience one-way or no-way audio is typically caused by the Asterisk
system being behind a NAT or improperly configured firewall (usually NAT).
The provider you are dealing with is correct when they say it doesn’t matter if
they listen on different RTP ports. That all gets
