7962 VOIP Phone Dies After switch upgrade/reboot

[dfranz3434]

Hi

Recently I upgraded several access swicthes (2960, 3650's) which have POE and Cisco 7962 phones connected.  After the upgarde and subsequent reboot, the IP phones failed to power up and are effectively dead.

All that happen on the phone now is that when the POE cable is connected, the phones mute button LED light flashes before the spekaer LED lights up and remains lite up.

Approx 5 phones across multiple switches have died this way.

Can anyone tell me if this is a behaviour they have experience and how they may have recovered from it.

[Leo Laohoo]

Disconnect the phone from the network and plug the phone directly into the switch port using a different ethernet cable.

[dfranz3434]

Thanks for the reponse, this has been tried and tested unsucessfully.

Any other tips?

[Aman Soi]

Try connecting Power adaptor , if u have .

Is this happening only for 7962 phones?

u can also run show power inline .what is the version u have upgraded switch to ?

regds,

aman

[dfranz3434]

I am searching for a power adapter now.

Yes - appears to be only 7962

The Watts are displaying as 7.0 as opposed to the normal 6.3 and the Device ID is showing IEEE PD

Version 12.2(55SE9)

[Leo Laohoo]

If you've plugged the phone directly to the switch and using a different patch cable and it still doesn't work.  There's a strong chance your phone is dead.  

[iswift]

There is a field notice -
https://www.cisco.com/c/en/us/support/docs/field-notices/637/fn63772.html
fits the hardware and symptoms.