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Joined: Mar 2005
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Moderator-Mobil Phones, Computers
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Moderator-Mobil Phones, Computers
Joined: Mar 2005
Posts: 588 |
The RJ45 thing isn't an "inside" joke. Its been debated quite publicly on the forums. As a matter of fact its likely to start another lively debate amongst ourselves as it has 4000 other times. That's why we laughed! Search the forums for RJ45.
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Moderator-Nortel, Computers, General
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Moderator-Nortel, Computers, General
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Posts: 8,734 Likes: 5 |
Originally posted by tito1411: ...Search the forums for RJ45. and especially read the posts from Ed. You're in for another EDucation :rofl:
Scientists say that the universe is made up of Protons, Neutron & Electrons. They forgot "Morons". Dave. (CTUB) Canadian Techs Use Bix!
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Telecom RJ45=Registered Jack that uses 2 pair of wires for transmit and receive of a T1 line.
Data RJ45=8P8C plug wired with the T568A or T568B wiring configuration.
I'm sorry Greg if you took that as an inside joke it was not meant to be but was to show that there is a difference between data and telecom.
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Joined: Mar 2012
Posts: 64
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Right on!!!!!
Now THAT is what I was hoping to find on this forum, suggestions of things to research to help educate myself. That's some great bedtime reading... (-:
I have yet to encounter a business that was wired on the T568A standard, seems all the one's I've dealt with have been T568B. Neither one is very conducive to telecom usage, though with VOIP gaining a steady ground that is becoming less of an issue.
By default, whenever I am wiring up a new office install for a client I run a MINIMUM of 3 cables. That gives me the ability to configure 2 as ethernet jacks and one as telecom (or any of those varieties).
One thing I wasn't able to find, and possibly the reason I was sent on that search, is there any particular reason more Telecom manufacturers aren't utilizing a standard plug between data and telecom? Of course with the variety of wiring possibilities for the wall jacks (not to mention the fact that I routinely find people who have plugged in their own devices putting their RJ11 plug into an RJ45 receptacle and then being confused why their phone doesn't work. So lack of knowledge at the end user, as well as confusion between wiring standards. What's the reason for it all? Or have I just not encountered new enough telecom systems as of yet to see the transition taking place?
Seems I went on a bit of a round-a-bout way of trying to ask that, hopefully it makes sense to anyone reading it!
Thanks again, I'm always up for a good education (especially when it isn't attached to some backhanded comments about anyone's abilities. I apologize for spouting off, was just feeling a bit beat on. I think we are all here to both learn from and teach each other.
Greg
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Joined: Jun 2006
Posts: 8,734 Likes: 5
Moderator-Nortel, Computers, General
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Moderator-Nortel, Computers, General
Joined: Jun 2006
Posts: 8,734 Likes: 5 |
568B is mostly used in the Sates. 568A is mostly used in Canada.
Scientists say that the universe is made up of Protons, Neutron & Electrons. They forgot "Morons". Dave. (CTUB) Canadian Techs Use Bix!
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Joined: Mar 2005
Posts: 588
Moderator-Mobil Phones, Computers
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Moderator-Mobil Phones, Computers
Joined: Mar 2005
Posts: 588 |
3 cables is fine. Standards recommend a minimum of 2 Cat5e cables at each jack location.
There is no reason for a standard plug since were talking about two different systems. From this point on refer to a voice plug a 6p6c or 6p4c and a data plug as 8p8c. This is the correct terminology. Not sure what you mean by neither being conducive for telecom standards. The recommended way of wiring jacks nowadays is 568b and that applies to both data and voice. There's not really any confusion at all.
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Joined: May 2009
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On the voice side, consistency is more important than whether you use the A or B standard. As long as all cables are punched the same, you’re in pretty good shape.
I have some buildings that are randomly punched as A or B, even on the same block. That’s a pain in the neck with the Inter-Tel system, which uses pins 3 and 6 for the phone. Sometimes it’s the orange pair, sometimes it’s the green.
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Joined: Mar 2012
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That's really strange. I have a few interns I hire from time to time, and they've been informing me that the local college is teaching them 568A standard. First time they helped with a wiring job, I, thankfully, realized they were wiring it opposite before we started punching down and terminating. Though I suppose as you said, if they had terminated both ends it would have been fine.
The confusion I was referring to (and I would have to search and read a lot of posts again to find exactly what it was mentioning) I thought said that neight 568A or B were used as a standard in telecom. Though I suppose same rule applies, as long as it is matched at both termination points it just becomes a matter of knowing which pair to attach to. That could be quite frustrating, especially as you mentioned, in a building that the 2 standards were used interchangeably. You'd have to test every point to be sure.
My favorite is entering a wiring closet of a multi business building, and seeing that each business has their own tech, and the spaghetti mess that (it seems 90%) of them leave behind. I'm a stickler for clean wiring, and even approached a couple building owners about allowing us to rewire (at a discount since it saves me time in the long run if the client stays with me). Quite a few times that has turned into some of those businesses hiring me to clean up their office wiring as well.
Sorry, got off topic there. Thanks again for the info.
Greg
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