[Asterisk-Users] Cisco 7960 Locking Up

[Mark Johnson]

Ok...  I asked a question a few months back about a 7960 that a user 
claims to be "shocking" her in her ear from time to time.  A few others 
indicated they had similiar issues and alot of them seemed to stem from 
power over ethernet.  Here's what we've done...  We replaced the phone, 
ran two new cat5 cables to a different switch, put in a power brick and 
disabled power over ethernet.

Over the last few months, the number of incidents of her getting shocked 
have reduced to almost never, but the phone is displaying the same 
symtoms as when she was getting the shock.  The phone seems to lock up.  
We can not establish any type of pattern as to what causes it, but 
here's what we do know.  She can be on a call and not touch any 
buttons.  The soft keys will blank out and she loses audio as does the 
person on the other end.   This has happened over both Zap and Sip 
channels.  The strange thing is that if she waits about 20 seconds, the 
LCD panel will sort of flash and she gets the call back!!  I never see 
anything in the CLI that makes me think Asterisk is even aware it is 
happening.

I've done some research and I found some people have had issues with 
cell phone radiation locking up or rebooting a 7960.  Has anyone else 
experienced this?  We tried removing her cell phone from the room and it 
doesn't seem to make any difference.  We do, however, have a cell phone 
repeater set up, but it's closer to alot of other users than her.  
Anyone have any suggestions on how to debug this?  Is there some type of 
logging meter we can buy or rent that we could stick over there and 
monitor the environment for a week or so?

As always, thanks for the help!!

Mark