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Guest Message by DevFuse

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cat 5 wire question

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55 replies to this topic

#51 OFFLINE   harsh


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Posted 31 October 2008 - 11:28 AM

Many PBXs are made to work on standard phone lines, but most commercial and even some residential guys are just opting to use all RJ45 jacks so they do not have to stock/carry both. Also many home phone blocks are starting to use RJ45 for the jumpers so they can be dual use (like the structured boxes from leviton, etc.)

Mixing connectors is a bad idea. Imagine some idiot plugging a VOIP phone into a conventional phone wired outlet because it used RJ45 instead of RJ48 and you begin to understand why the distinction is important. Ethernet equipment typically isn't designed to handle the 90+ VAC ring voltages of a POTS line. Gigabit Ethernet voltages go as high as 4V.

Then there is the separate issue of PoE that may find its way up to 57VDC.

Know that if the connector fits, someone somewhere is going to plug something into it that it wasn't anticipated. If you do just a little research, you'll find out quickly why they stopped using telephone handset connectors for keyboards.

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#52 OFFLINE   David MacLeod

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Posted 31 October 2008 - 12:03 PM

2 years ago lost a $ 3k dollar cisco switch at work due to this. if plug fits it will be used.
Dave MacLeod

#53 OFFLINE   Nabisco



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Posted 03 November 2008 - 06:57 PM

The easiest way to make patch cables is with the EZ-RJ45 connectors:

Posted Image

These things work great! You insert the wires into the connector and they stick out the end! Verify you have the proper order, pull the connector down tight, trim them off then crimp.

http://rover.ebay.co...02&toolid=10001 EZ-RJ45

Also, keep in mind that cat5 has four pairs of wires, you only need two pairs for ethernet. The blue and brown pair are not normally used so you can use them for a phone circuit or if you have a bad wire in the green or orange pair, you can use them instead.

so is this the best type to use i want all the wires to be used so no matter what i use the wire for it is the right wire combo, so i can just sit at home and make lots of different ones lengths. i am goint to use it for anything cat 5 is made for. do you have to strip the ends when you use those ez fittings? or does it strip them when you crimp them? i tried to use the cat 5 fittings i got from home depot but not good, those ez fittings look to be good, can i get them at home depot or radio shack


#54 OFFLINE   houskamp


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Posted 03 November 2008 - 06:59 PM

You don't have to strip the wires for any of them..

MRV was all that's left on my wishlist (wishlist done) :D

#55 OFFLINE   Grentz


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Posted 03 November 2008 - 10:48 PM

telephone and network connectors have prongs that crimp into the wires, no stripping required except to remove the main outer cover.
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#56 OFFLINE   Nabisco



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Posted 05 November 2008 - 09:12 PM

works a lot better when you dont strip the wires, i didnt know that you dont strip them i like those ez fittings so you can get the jacket to the fitting

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