Hello,
I am having 7975G IP phones registered in CUCM but whenever i put POE cable or power cable to power it on, it stucks to "Upgrading" and doen't go further. CUCM version is 8.6 and Device defaults of 7975 is SCCP75.9-2-1S. I have tried doing factory reset (power off then power on # button then 123456789*0#) also but is not working. Can anyone help here?
