I've got 2 polycom video conferencing appliances and setup static nats and basic h.323 and h.225 inspection for them.
They work fine for about 13 minutes then disconnect! I can reconnect then they work again for 13 minutes! Any Idea's?
The only reason I can think of is timeout values, either on the ASA or Polycom device. I will start checking the timeout values and also ASA logs so we can see what is happening at the moment of the disconnection.
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As Juan suggested, review the logs, probably you will find some of them saying that the connection was closed due a "pinhole" timeout. This means that no traffic was traversing the secondary link and it was closed. Not the ASA's fault.
Also, have you tried disabling the H323 inspection?
funny ... I have the exact same issue, but just on one of my end-points.
Did you manage to resolve your issue ?
If so what did you do ?
I run a ASA 5520 version 8.2(4) and a polycom HDX 6000 HD version 3.1.2
the strange part is i have two polycoms, the older one works and has firmware 3.0.3
how about that ..