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9951/9971 Preservation Mode Disconnect

While on conference calls, whether conferenced through the phone or through a toll-free service, our 9951 and 9971 phones often go into Preservation Mode and disconnect the call. Going into Preservation Mode seems to be a known bug, but the call is supposed to stay active, while ours do not.

We have updated to the latest firmware for both models, 9-4-2, and that seemed to help the problem, but it has not gone away completely.

We are on UCM version 9.1.2.10000-28

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what was the outcome of this issue? is it a known bug on this version of call manager (version 9.1.2.10000-28)...

 

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