Call dropped after a minute one direction only
 

Hi all,

I have quite an interesting situation. I've got Linksys SPA3102 on one end and Billion 6404VGP R3 on the other end.

• Linksys has a public routable IP. Voaxalot Symmetric NAT = NO
• Billion sites behind a broadband router with a private IP. Voxalot Symmetric NAT = Yes
• Both devices register with Voxalot fine

Both devices can successfully make calls to PSTN via a provider registered with Voaxalot. Calls from Linksys to Billion work very well also.

The problem is with calls initiated from Billion to Linksys - everything seems fine, but after about a minute (maybe two - it varies it seems) the call is disconnected.

On Billion side one can hear some noise before the disconnect, on Linksys side it just goes quiet before Linksys gives the engaged / call failed tone.

I tried debugging, but don't know enough to understand the output. I can see a SIP BYE packet in Billion Logs (received or sent - I don't understand). Also in Linksys logs it seems that the RTP ports change several times before disconnect.

If anyone knows where to start looking / had a similar problem, please help.

Tks in advance.

PS. I also call another voxalot user, who has X-Lite behind a NAT router. That always works well both ways.

Possibly not a new issue.
I run into a similar problem recent weeks (one-way audio often). not sure what I did wrong. I would guess US server might have a new problem.