Changing firmware revs did not help, so that left the LAN.
I looked long and hard at the LAN and it was basically narrowed down to the
switches. In this smaller install, several cheapo Dlink ($30) switches
de-aggregate a Cisco Catalyst switch. What I noticed was that any phone
plugged direcly into the Catalyst did *not* lock up or reboot. Any phone
plugged into the crap switches experienced the lockup. So now we are down to
the cheap switches themselves. We are nuking the Dlink switches and
replacing them with 3com workgroup switches, same as what we use in the
large install to good effect, and I fully expect the problem to dissapear.
It's unfortunate that Snoms have a propensity to freak out in certain
environments but I don't think it would preclude me from using Snom in the
future. As long as one is aware of this issue, it should be easy enough to
work around.
Thanks for your input!
Previously I was using Nortel 10/100 switches, I replaced them some
weeks ago with 3C16479 gbit switches. The phones are connected directly to
the gbit switches. By coincidence I dit notice on one phone that in a
split second a message appeared 'Ethernet cable disconnected'. Because I
have cable unplug set to ignore the conversation was not interrupted and
the conversation could continue.
But that still doesn't solve the occasional lockup.
One phone was giving me *lots* more reboots than others but that was due
to it running firmware 6.0.4 without having the ramdisk converted to jffs.
Apparently the firmware didn't like that at all or just runs out of
memory and decides to reboot.
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