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The network is using CISCO ASA but if I turn of H323 then the video conference between the sites does not work, and I need that too.

But at that time i am dialling there is another call going on on the SCN meaning the SCN is up.

At site A, I have extenions 551 and 552. At site B i have extensions 351 and 352. I use 551 to call 351. And when they are in the middle of a call that is going on well, I use 552 to call 352 but get "CALL:UNOBTAINABLE". If I keep re-dialling the call will eventually go through. Meanwhile 551...

I have had a closer look at it and it seems like when a SCN extension is dialled, most of the time the system thinks it is an outside line and tries to dial it out through the analogue trunk lines. I thought the system should first match to an extension (including the SCN extensions) before...

Yes the CISCO ASA firewall use fixup and I need to keep using it because if i turn them off the Video Conference stops working. What causes the calls to go through one time and another time does not? Below is a trace of a call that did not go through 12/2/10 6:29:47 PM-886ms Extension = 551...

@Bas1234 - Let me reboot the routers now and see if there is any change. @edmana - We also have Polycom Video Conf. When we turn off H323 Inspection the video conference cannot work. So they are on. But the calls drop after exactly 2 min unless the user presses more buttons during the call. We...

Hi, am setting up a SCN between main office IP500 (v5.0.22) and branch office IP500 (v5.0.22) over a VPN with CISCO ASA5510 firewalls at each site. 1608 phone screen often shows "CALL:UNOBTAINABLE" when SCN extension is dialed. 10% of calls go through on first dial 40% of calls go through on...