[cisco-voip] Strike 3 - Dead 7940G IP Phones - Update (Jason Aarons (US))

[Micah Bennett]

Thanks everyone.

 

Yes, we have no way to test, and even if we did, it seems to be
intermittent.  Like I said earlier, we went 4 months with no issues and
then 5 more phones died during our testing.  I have removed the phone
from this station and I am looking at the options to move that printer
somewhere else if they decide they need a phone there. 

 

Micah Bennett 



  _____  

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Fuermann, Jason
Sent: Monday, January 05, 2009 9:52 AM
To: 'FrogOnDSCP46EF'; 'jason.aarons at us.didata.com';
cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] Strike 3 - Dead 7940G IP Phones - Update
(Jason Aarons (US))

 

We had a similar problem with improperly shielded 7940's. Our mobile
radios would cause the phone to reset when we PTT. Never had any phones
completely dead from it though. I wouldn't count on a cable tester to
pick up this RF interference because it could be well out of range from
the frequency the cable tester is using. Cisco replaced all our phones
as they said this was a defect in earlier versions. Your best bet is
probably going to be to move phone and printer as far away from each
other as possible. In our case this was about 6 ft. Hope this helps

 

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of FrogOnDSCP46EF
Sent: Tuesday, December 30, 2008 9:06 PM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Strike 3 - Dead 7940G IP Phones - Update (Jason
Aarons (US))

 

Hi Jason,
Good recap!! Thanks for sharing this on this forum.

To check EMI, you can use a good CAT5/6 cable tester.

1. Check EMI of your bad cable - make a note of all parameters, there
are more than EMI.
2. Check EMI of your any of other good cable - and then compare the
parameter, at least you can show that comparative to your customer.

HTH


-- 
Smile, you'll save someone else's day!
Frog

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