Call Forward unregistred Problem with MGCP and CUCM 6.1(2)
i have a CUCM 6.1(2) with one 2811 router.
In this router (IOS c2800nm-ipvoice-mz.124-22.T5.bin) there are 2 PRI, 2 BRI configured with MGCP (one for PSTN and one for communicate with one PBX).
In general all works fine, but there is a problem: when i call one IP Phone through one of the two PRI or BRI (external call through direct number or call from PBX), if this Phone is unregistred, the Call Forward Unregistred doesn't work, but if i call this phone from another IP Phone it works.
It isn't a problem of CSS because if i put the same CSS in Call Forward All and i try to put the same call (through PRI or BRI) it works.
It seems like that the CUCM can't communicate the correct indication for Call Forward Unregistred through MGCP, and i hear fast busy. I have the same scenario with CUCM 7.0 and it works fine.
I've already change the IOS of the router without good news and i wouldn't upgrade the CUCM for the moment.
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