[cisco-voip] Radio caused reboot of IP phones

[Matt Slaga (US)]

The 7940 and 7960s both have 400mhz processors.  If you place excessive
radio frequencies in that range near one of these phones, yes it will
confuse the poor thing.

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Brad Rogers
Sent: Tuesday, March 11, 2008 9:49 AM
To: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Radio caused reboot of IP phones

 

From what I understand, this is specific to a certain manufacturing run
of 7940's and 7960's.    When they were manufactured they left out the
RF shield.  When this happened to us we replaced some phones with new
ones and it fixed the problem.

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of JASON BURWELL
Sent: Monday, March 10, 2008 9:59 PM
To: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Radio caused reboot of IP phones

 

It seems to me the more urgent concern in this situation might be the
radio's user being exposed to that level of RF radiation on a daily
basis. If it is sending out enough TX wattage to make a 7941 reset, that
can't be good for the body. 

 

Jason

 

________________________________

From: cisco-voip-bounces at puck.nether.net on behalf of Wes Sisk
Sent: Mon 3/10/2008 4:53 PM
To: Scott Voll
Cc: cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Radio caused reboot of IP phones

Known issue and not much we can do about it.  Phone has to be
susceptible to RF interference by FCC rqmt.  Some phone models are
more/less susceptible by housing insulation, but all do reset with
enough RF close enough.

/Wes

Scott Voll wrote: 

Has anyone seen this before.

 

one of our sites uses Kenwood ProTalk radios.  if you key the radio the
IP phone (794x) phone reboots.  Totally reproducable.  Key the button
reboot.  

 

Is this a know bug?  anyway to fix it?  in the event of an emergency
when both phone an radio are needed, this could be really bad news!

 

TIA

 

Scott

 
 


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