Disconnect computer from network and plug into switch (Switch should only have computer and phone.To be safe, setup configuration files to have SIP.cnf and (Check website above if you don't know how to setup configs) Unzip firmware and configuration files to a folder. Download TFTpd32 at and firmware and configuration files.If you do not know how to setup config files, check out the site Cisco IP Phone firmware (I used P0S3-8-12-00).I was able to recover the phones by doing the following:ĬAUTION: The instructions configure phone to work as SIP Phones not Skinny SCCP. The other was a Cisco 7960 and gave an error Application Protocol Invalid. On the Cisco 7940 we received TFTP timeout o / A and just remained there. Out of the batch 2 did not boot up to the point where we could access the settings. I was given the task to setup 6 Cisco IP phones. These Cisco IP phones are a pain to setup.
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