7975 IP phone keeps rebooting

Answered Question
May 20th, 2008

We just brought a new 7975 IP phone and the phone keeps rebooting. checked the firmare version and the image on callmanager. not quite sure why this is happenning. BTW, the CCM version is 4.2Sr3a

I have this problem too.
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Correct Answer by thisisshanky about 8 years 6 months ago

can u answer my second question. Are you able to add a device as 7975 ? or have u added this phone as 7970 ?

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Overall Rating: 4 (1 ratings)
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thisisshanky Tue, 05/20/2008 - 09:29

What are the sequence of display msgs u get on the phone ?

Are u able to add the phone in Callmanager as a 7975 phone?

Naveen Raj Janardhan Tue, 05/20/2008 - 09:33

on the phone downloading image screen , it comes up with "auth fail" and before it goes through the reboot phase it comes up with "Registration rejected : error mismatch"

Correct Answer
thisisshanky Tue, 05/20/2008 - 09:35

can u answer my second question. Are you able to add a device as 7975 ? or have u added this phone as 7970 ?

thisisshanky Tue, 05/20/2008 - 10:51

Have you tried resetting the phone to factory defaults..

what is the default firmware on the phone (you can go to settings-> option 5-> option 3.

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