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Moderator-Vertical, Vodavi, 1A2, Outside Wire
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
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What exactly are these things for? It seems like they come on cables for everything these days. Some of them are just plain bulky and inconvenient especially when they are fixed in place. Anybody know exactly what their purpose is?
Ed Vaughn, MBSWWYPBX
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Arent they supposed to squelch emi's? Could be wrong.
What cables are you noticing them on?
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If only one end of the cable has a ferrite core, which end is it supposed to go near? The phone/peripheral or the switch/PC?
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Joined: Jul 2003
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Ed rusty is right
Comdial used to require one on every 25 cable to every card in the system and one on each power cable. Samsung also has them on the 25 pair cables. We have used them on line cords to phones with great success in reducing RFI
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The PBX/KSU end of the cable is where the ferrite collar should be placed. I have used them on line cords at the jack to reduce RFI. Example, we had a customer that had a floor mounted jack (2nd floor) right above a florescent light fixture (1st floor). We put the ferrite collar on the line cord at the jack and eliminated hum from the florescent light.
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Joined: Jan 2005
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
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Moderator-Vertical, Vodavi, 1A2, Outside Wire
Joined: Jan 2005
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I guess I should have been more specific with my question. I already knew that they are primarily for reduction of RFI, but how do they do it? RFI is a form of energy and energy cannot be destroyed. How do these things dissipate the energy? Do they heat up or something?
Ed Vaughn, MBSWWYPBX
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Great sites guys. :toast: Ed just imagine a funnel and water passing through it. This is the job that ferrite does it takes the rouge signal and pushes it back into an acceptable position for the equipment. You are correct you cant "destroy energy" but you can realign the frequency the energy is producing. Although I am not as smart as the guys that figure this stuff out,  I can dumb down just about anything so that I can understand it. :shhh: Again guys great sites. The quote for the day is "a good engineer understands how to design a thing, a great engineer know's how to find the guy that can build it"
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