Denial Event 1220 - PBX Info :: Your Free PBX, PABX and Telephone Information Resource

teledinamica · 11-30-2007, 02:32 PM

Hi
I set up IP Trunks between IP Office and Prologix CM. It work fine until the last week, right now if I call from the Prologix to the IPO the call never establish.

When I trace the call in the PBX a get the next error:
Denial Event 1220

I read the alarm manual and it say is a problem with ISDN and Q.931 protocol. If I don´t change anything in the PBX, where is the problem?
Thank you

***MSYoung*** · 11-30-2007, 08:28 PM

If you made no changes in either PBX then that means that something changed in the network between the machines.

teledinamica · 12-05-2007, 10:43 AM

They don´t tell me if they made changes in the network. I think was a problem with a firewall, that maybe they reject the udp port created in the network region.
But they argue with the same Derfinity make calls to another IPO.

***MSYoung*** · 12-05-2007, 11:49 AM

Can you ping the other machine. Try this from both ends if possible.

teledinamica · 01-10-2008, 06:29 PM

I reach both sides with the command ping. I do the ping from the CM without problems.

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