IP Telephony and Phones

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I have a big problem with IP Phone when I configure forward for it.On CUCM , I configure one IP phone with Noanswer External forwarding to a mobile.When I Call from PSTN to this IP Phone but no ones answer , it is going to forward the call to my mobi...

Is there a way to speed up the upgrade installation in a production environment?In my lab, I installed 6.1(5) in the inactive partition the following order:-          Publisher-          TFTP -          Subscriber (backup)-          Subscriber (prima...