[Freeswitch-users] Unexpected silence on the call

[VM Knott]

Note:  My skills with FS are mediocre at best, and my SIP knowledge is
very green, so please bear with me.

We have been experiencing an inconsistent problem with our FS conference server.
On occassion, a person on the call will go silent.
They remain connected to the call, but they have no voice (their
channel does not appear muted in the CLI).
They can hear everyone else on the call.

If they hangup and reconnect to the call everything is okay.

After performing some digging on a recent occurance of this behavior,
it appeared to coincide with re-invites being sent from our platform
back through the SIP Tandem.
>From my understanding, the re-invite is initiated because of the
session_expire parameter having been set to 15 minutes (1800 seconds).

Our current assumption is that the 1800 seconds is expiring, and we
are attempting to initiate the re-invite to the carrier, and the
routing is not executing properly, perhaps?

Has anyone experienced this problem?
Is there a way to override the request to set the session_expire, or something?

VMK