7975 phone will not upgrade after factory reset

[timsoto25]

i have a UC520.  i recently upgraded software pack to 8.2.0.  i received the typical auth fail message so i performed a factory reset of the phone.  now it shows that it is trying to upgrade but remains at 0K when downloading term75.default and moves no further.  i am stuck.  i have tried to load several different phone loads to try to solve the issue to no avail. any help would be appreciated.

[paolo bevilacqua]

Forum should be "IP telephony" as that phone is not really a small business one.

Post "debug tftp events" with "term mon" in there.

[cindy toy]

Per Paolo's suggestion, this thread has been moved to IP Telephony.

Regards,

Cindy Toy

Cisco Small Business Community Manager

for Cisco Small Business Products

www.cisco.com/go/smallbizsupport

twitter: CiscoSBsupport

[Gajanan Pande]

Does the phone now have any firmware in it at all now ? If yes, what's the version.

GP.

[timsoto25]

No, GP, the phone has no firmware at all on it now.  Just reboots and tries to pull it and fails.  I am now catching a glimpse of the "Auth Fail" message when it fails.  Should i try and load the 8.5.2 firmware on the system and see if it will complete the upgrade?  I don't know if that is the issue but it seems to be the next thing that i may attempt.

[paolo bevilacqua]

If you search on the error messages, there are many thread on the matter, indicated the solution.

[Gajanan Pande]

Yes, you can try that. By the way, was there any certificate implementation between phone & CUCM ?

GP.