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T1 PRI up/down occasionally

Hi All,

Config: 2821, IOS 12.3(11)T5, 2 Channelized T1/PRI ports

I setup one T1/PRI controlled by CallManager. The linecode is b8zs. But the controller T1 goes up and down occasionally with a reason (AIS detected). Any idea? Thanks a lot.

================================

01:40:40 CCT: %CONTROLLER-5-UPDOWN: Controller T1 0/0/0, changed state to

down (AIS detected)

01:41:12 CCT: %CONTROLLER-5-UPDOWN: Controller T1 0/0/0, changed state to

up

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Re: T1 PRI up/down occasionally

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