Maulik Shah Tue, 04/21/2009 - 18:17
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Do a show controller t1 - check for items based on flow chart at link below:

If there is a remote alarm - it implies the far end is at fault i.e. your provider. Another test to ensure its not a HW issue is to create a hardware loopback plug and check if the controller comes up if loopback cable is in - if it comes up then you know its not the UC520


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