sundance-communications.com/forum Forums TDM Business Telephone Systems Inter-Tel Telephones & Systems Inter-Tel VoIP phones and the Internet (No audio)

I'm working on putting some 8622 VoIP phones at end user homes. Both the card and the phone will be behind firewalls.

The phone works locally with no issues.

As of right now the remote end user phone connects to the local IPRC card and they are able to dial extensions. But no audio....

I've opened the port stated by other posts
https://www.sundance-communications.com/forum/ultimatebb.php?/ubb/get_topic/f/4/t/001940.html

As of right now I've got the following ports open:
UDP 6004-8000
UDP 5000-5070
UDP 5566-5567
TCP 5566-5567
TCP 5570
TCP 4000

I've checked the card to make sure the phone is set to NAT/Auto...

What am I missing???

Bump

Here's the ports I have open to my IPRC card..

TCP 5566
UDP 5567
TCP 5570
UDP 5004-5007


I'm running 8660s and 8662s and 770.4500s.
I'm running 8.2 code.


Yours is a superset of my working config.

One thing I seem to remember is the IPRC doesn't work well behind NAT.

As the next step, I'd setup a network sniffer (ie. Wire Shark) and see what the traffic looks like locally as well as remotely. It's not going to be able to decipher the IT control channel, but that just sets up the RTSP streams like any other VoIP control protocol and isn't too important to decipher.

Call setup is going through (control ports), but you're not getting media streams. (High port UDP that frequently doesn't play nicely with NAT.)

Your problem is more likely to be the consumer NAT/PAT routers in those homes. Many of them don't understand VoIP, and therefore, don't open up media ports, and rewrite the call setup packets to use their real, public IP.