Help in understanding why concurrent video calls limit in my system is 80

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Hi,

today I run in a limit I was not prepared to encounter.

I was managing a large videoconference and I could not go past 80
concurrent calls. I understood that because I had one set top box who
could not join the conference: I tried everything that I could to make
it so but it succeeded only when I had the idea of disconnecting my
own client, the one I use for monitoring. Once the set top box was
able to join the conference, it was the turn for my endpoint to be
unable to join the conference.
The error I received back was "Error Q.931" and on the status port it
was listed that the call was normally dropped.

I cannot read the log file to give more precise insight about the
problem cos it's 446Megs (I guess it's becouse I had some issues with
an ISDN gateway which resulted in massive output to the status port
and so to the log file) and any software I normally use to view log
files refuse to open it due to memory limits.

May it be something related to GnuGk configuration? As far as I can
tell, it's set so that only signalling is routed thru the GnuGk (to be
able to disconnect calls between endpoints via telnet), so I don't
think it's bandwidth related (moreover cos there were 5 mcus cascaded
in the conference so that connections were balanced among them and I
had troubles with connecting to any of the 5 mcus once concurrent
calls reached the 80 limit).

Do you have any suggestion of what I may look into to go past this
limit? I can reproduce this situation only during a real meeting, it's
impossible to arrange a test with more than 80 clients, so I need to
have an idea of what this problem may be before allowing again a
conference with more than 80 clients.

I'm using GnuGk 2.3.3 (it works well and I try to stick to the "if it
ain't broke don't fix it" rule).

The relevant sections of the ini file are listed below. I have to
mention that I am no expert in h.323 so I have taken the routed
directives from the examples found in the online manual.

Thanks for any help.

Cheers, pierlu

----------------------------------------------------------------------------------------------------------

[Gatekeeper::Main]
FortyTwo=42
Name=GnuGk
Home=10.1.12.43
Bind=10.1.12.43
TimeToLive=600
StatusTraceLevel=2
TraceLevel=5

[RoutedMode]
; enable gatekeeper signaling routed mode, route H.245 channel only if
neccessary (for NATed endpoints)
GKRouted=1
H245Routed=1
AcceptNeighborsCalls=1
AcceptUnregisteredCalls=1
CallSignalPort=1720

; proxy calls only for NATed endpoints
[Proxy]
Enable=0
; if port forwarding is correctly configured for each endpoint, you
can disable ProxyForNAT
ProxyForNAT=1
ProxyForSameNAT=0

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