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

[Fuermann, Jason]

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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