01-31-2013 07:03 PM - edited 03-16-2019 03:28 PM
The phone model 7975 having problem with registering in call manager.
when connecting phone in the network.
first it is getting power
then on the scrren showing UPGRADING.
Tthen showing AUTHENTICATION FAIL.
What could be the cause?
thanks
kavi
01-31-2013 10:19 PM
Wrong forum, post (and search) in "voice - IP telephony". You can move your post using the Actions panel on the right.
02-01-2013 01:26 AM
Hi,your issue is related to firmware upgrade issue. you need to check the current firmware of your on phone and ccm.you need to upgrade the phone to firmware version 8.5.2. then upgrade to latest one in ccmHTHAnasSent from Cisco Technical Support Android App
02-01-2013 06:33 PM
Thanks Anas.Let me try.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide
Log in to Community
