spa2102 with 2 voxalot accounts can't hear voice
 

Hi, I've installed a Linksys SPA2102 behind a firewall.
I redirected the followind ports from router configuration to SPA2102:
UDP 2060, UDP 3060 and TCP+UDP 3478.

Then I configured 2 voxalot accounts:
Line1 on UDP2060, Line2 on UDP3060.

Under Voice - SIP - Nat Support Parameters - STUN Server I wrote "stun.voipbuster.com:3478".

Now everything seems working: both accounts can dial external numbers (through dial-out SIP providers like mytcom.it) and can be contacted from external Voxalot users. The voice is clear and the connection never drops.

The problem is that the two phones attached to the SPA2102 cannot talk to each other: when I call one from the other, the phone rings but none of them can hear the other's voice; in other words, they cannot hear each other's voice.

If I use another SIP provider (like utelia or mytcom), it works. It even works if I use one voxalot and another SIP provider. The point is that I need to configure both of them on the same SPA2102 with voxalot.

Thanks for any hints.

mauro

try a different stun server for each of the account

sorry that won't do... only one stun for both lines. try another stun to see: stun.voxalot.com

That's right: just one stun for both lines.
I tried with stun.voxalot.com:3478, it still can't hear voice.
Please note that if I change the Voxalot accounts, it does work with the same stun.
It seems very related to voxalot. If I could find a different sip broker providing free SIP accounts consolidation, I would move to that one.

Thanks again,

mauro

I suspect that you can get the 2 Voxalot accounts on the same ATA to be able to communicate by creating a forwarding account (Eg. with Callcentric), set up to forward the call to the second channel.

From Channel A, call the forwarding account which forwards to Channel B.

To reduce the length of the number to call you can set up a speed dial in the Voxalot dial plan, or a Sipbroker alias.

should be NAT mapping issue. hard to fix.
try to change port#, router, stun... one by one. it's not easy.