[asterisk-users] Upgrade cisco SIP phone 7940

[Adrian Marsh]

Hi All,

 

My current 7940 phones use P0S3-06-3-00.  I'd like to upgrade them so
they're not massively out of date.

I found a page at http://www.voip-info.org/wiki-Asterisk+phone+cisco+79xx
that gives some info, and using the cisco links there have tried to upgrade.

 

According to the procedures, I should be able to upgrade, but once the
phones loaded and reboots it says it downgrades again and reboots, then the
cycle starts again.

 

Anyone had any success in doing this?

 

 

Adrian Marsh 

 

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