[Asterisk-Users] Cisco 7960G phone crashes during SIP upgrade

[Rich Adamson]

> I've recently received a Cisco 7960G phone with the factory default
> SCCP firmware on it.
> As we're using SIP on our network, the first things i've done was to
> upgrade but unfortunately the phone just restarted. By looking on the
> TFTP logs and tcpump output, i've seen that the phone crashed and
> restarted just after downloading the OS79XX.TXT file, without
> requesting the image file at any moment.
> 
> If i'm putting a SCCP image file name (without ext.) on the OS79XX.TXT
> (begining with P003), the phone doesn't crash and request the
> respective SEP<mac>.xml file. Unfortunately (again), just after
> downloading the xml configuration it hang and restart. I've checked
> the syntax and they's no error on it, if they's one the phone output
> the error on the display without crashing. Note that i've both put
> with and without the load information statement, with the same result.
> 
> Both statical and DHCP configuration has been tried.
> Maybe it's an hardware failure or i've miss somethings realy important :)

That's been covered at least a 100 times in the last year. Check the
archives and wiki.

Bottom line... on most models of the Cisco phones, you have to upgrade
from sccp to sip in steps. Sip v2, v3, v5, etc. On some, you'll need
to remove a bunch of the comments from the config files during the
upgrade as you'll bump into some sort of buffer overflow that tends
to suggest certain versions of firmware don't allocate enough space
to read the entire config file from tftp. Check the wiki.