I have a couple of Cisco 7821s manually adopted without CUCM or any other software  Their clock are hours behind and minutes don't matchI tried different NTP pools as well as directedbroadcast mode and hard power reset  It responds to time zone chang...

Hello allI recently got my first VoIP phone the Cisco 7821 and I have zero experience with VOIP phones From what I know I need to enter the sip settings to configure the phone but after some googling, I found out that I got the enterprise version for...