hi, I found the configuration under voice-port of my ISR4431 disappeared suddenly after the E1 had down and up last week. anyone encountered this before? can it be avoided? thanks

i have a clutster with 6 CUCM servers, my phones registered to one of the servers before, but i moved them to the new sub recently but strange thing happened, PSTN call out not working for individual extensions but only for prime line, call in withou...

If we want to migrate from CME to CUCM, can the license be transferred as well? or we need to buy new licenses? besides, is co-residency with other 3rd party applications not supported if we will install the CUCM on a non-Cisco hardware? thanks/

hi, I have a cisco 3560-24PS switch acting as the controller with two 2702i AP joining. now that no clients can join the SSID, keep prompting for password even I reset the password already. I found the 802.1a/n/c radio is showing down, is it related?