I have a setup with a SPA9000, SPA400 and several phones (962,942 and 922). All phones and the 9000 are flashed to firmware 6.1.5.
My problem is that after some time (didnt figure out how much time) outgoing calls only have one way audio.
I can hear the other party fine but they can't hear me.
The second call (redial) within seconds always works fine.
Incoming calls are fine.
Internal calls are OK
The SPA9000 works as a gateway (Force Media Proxy = Yes) and registration is fine I think (register expire = 3600, just like my provider states) and connection is being made right away after dialing.
- No firewall issue because second call succeeds
- No codec issue because second call succeeds
- No hardware issue because more phones have the same problem
The 9000 is directly connected to a router/firewall which has been replaced with another brand without improvement.
The phones are connected to a managed Nortel PoE switch
Any suggestion is welcome :)