Cat 5 Wiring

Noevo · Post by **Noevo** » Tue Dec 11, 2007 10:59 am

Who has a good color diagram of B scheme? I'm tired of googling lol

Post by **Philip** » Tue Dec 11, 2007 11:03 am

http://www.speedguide.net/read_articles.php?id=118

Noevo · Post by **Noevo** » Tue Dec 11, 2007 11:04 am

Thanks P. I knew I had seen one here but couldn't remember where

that's perfect

morbidpete · Post by **morbidpete** » Tue Dec 11, 2007 11:06 am

as long as both ends are the same dosnt really matter i think.
anyways whats the point in the a/b scheme? like whats the application for each scheme?

Noevo · Post by **Noevo** » Tue Dec 11, 2007 11:13 am

pete, I've always heard some areas of the country use A while others use B. Don't know if it's a myth or not, but East is allegedly A, West is supposedly B.

morbidpete · Post by **morbidpete** » Tue Dec 11, 2007 11:15 am

hmm weird,

A-side yo! lol

so the people in Colorado and Kansas get to pick, thats not fair

Post by **Philip** » Tue Dec 11, 2007 11:15 am

Just standard color-coding... If you have "a" on one end, and "b" on the other you get a crossover cable, where the transmit/receive pairs are switched.

YARDofSTUF · Post by **YARDofSTUF** » Tue Dec 11, 2007 11:30 am

Noevo wrote:pete, I've always heard some areas of the country use A while others use B. Don't know if it's a myth or not, but East is allegedly A, West is supposedly B.

I thought b was US and A was european.

Comtrad · Post by **Comtrad** » Tue Dec 11, 2007 11:35 am

568A used to be the standard, but was overtaken by 568B.

Sava700 · Post by **Sava700** » Tue Dec 11, 2007 2:11 pm

http://www.lanshack.com/make-cat5E.aspx

TonyT · Post by **TonyT** » Tue Dec 11, 2007 2:20 pm

A & B are just standards, nothing to do w/ geographic locations.
Anyway, only 4 wires are ever used in networking, the other 2 pairs don't get used.

Blisster · Post by **Blisster** » Tue Dec 11, 2007 2:49 pm

TonyT wrote:A & B are just standards, nothing to do w/ geographic locations.
Anyway, only 4 wires are ever used in networking, the other 2 pairs don't get used.

not nescessarily true with 1000-BaseT and PoE applications.

hoss · Post by **hoss** » Tue Dec 11, 2007 4:02 pm

Philip wrote:Just standard color-coding... If you have "a" on one end, and "b" on the other you get a crossover cable, where the transmit/receive pairs are switched.

great, now he's just going to use his crayons to make the wires the right color

CableDude · Post by **CableDude** » Tue Dec 11, 2007 6:27 pm

Sup Noevo.

Noevo · Post by **Noevo** » Tue Dec 11, 2007 8:39 pm

Hey CD, who's new?

Post by **YeOldeStonecat** » Wed Dec 12, 2007 6:19 am

Noevo wrote:pete, I've always heard some areas of the country use A while others use B. Don't know if it's a myth or not, but East is allegedly A, West is supposedly B.

The majority anywhere is "B". I don't think I've ever come across a place wired with A.

Post by **Philip** » Wed Dec 12, 2007 8:19 am

Well, you need both "A" and "B" for a crossover cable. the "A" is just a "B" with crossed transmit and receive pairs.

Comtrad · Post by **Comtrad** » Wed Dec 12, 2007 9:04 am

Philip wrote:Well, you need both "A" and "B" for a crossover cable. the "A" is just a "B" with crossed transmit and receive pairs.

Well you could go as far as saying that "B" is just a "A" that has a crossed pair, since "A" was around first.

Joint Chiefs of Staff · Wed Dec 12, 2007 9:08 am

YeOldeStonecat wrote:The majority anywhere is "B". I don't think I've ever come across a place wired with A.

K-Mart I integrated 16 of the US distribution centers back in 1998 and they did not want to change with 568B. Their reasoning....

it would confuse the on-site technicians.

Comtrad · Post by **Comtrad** » Wed Dec 12, 2007 9:11 am

Joint Chiefs of Staff wrote:K-Mart I integrated 16 of the US distribution centers back in 1998 and they did not want to change with 568B. Their reasoning....

it would confuse the on-site technicians.

Joint Chiefs of Staff · Wed Dec 12, 2007 9:12 am

Noevo wrote:pete, I've always heard some areas of the country use A while others use B. Don't know if it's a myth or not, but East is allegedly A, West is supposedly B.

IBM token ring/coax RG59 and ever twin-ax cabling were in place years before 568A and then 568B came along. I started structured cabling back in the token ring/coax days as it advanced to 10baseT and then 100baseT networks.

I haven't touched a cat5e cable in over 3 years.

Comtrad · Post by **Comtrad** » Wed Dec 12, 2007 9:19 am

Joint Chiefs of Staff wrote:IBM token ring/coax RG59 and ever twin-ax cabling were in place years before 568A and then 568B came along. I started structured cabling back in the token ring/coax days as it advanced to 10baseT and then 100baseT networks.

I haven't touched a cat5e cable in over 3 years.

We have a customer that bought old cash registers, that require Token Ring. So instead of paying a little extra for new registers, they have to pay a lot more for us to custom make cables for them. We have to bring in the connectors from Israel because nobody stocks the keyed type they need. A real pain in the ass, but a nice $ from it.

Joint Chiefs of Staff · Wed Dec 12, 2007 9:27 am

Comtrad wrote:We have a customer that bought old cash registers, that require Token Ring. So instead of paying a little extra for new registers, they have to pay a lot more for us to custom make cables for them. We have to bring in the connectors from Israel because nobody stocks the keyed type they need. A real pain in the ass, but a nice $ from it.

There are a few sites in Canada that sell the connectors and even the matrix's. hmmmm That was a few years ago tho.

I use to love terminating token ring connectors. It was a good change at the time from terminating coax BNC connectors.

Post by **YeOldeStonecat** » Wed Dec 12, 2007 9:48 am

Joint Chiefs of Staff wrote:It was a good change at the time from terminating coax BNC connectors.

Heh..coax...yuck....hated troubleshooting large networks of coax....T-bars or term caps...process of elimination sucked.

Joint Chiefs of Staff · Wed Dec 12, 2007 9:52 am

YeOldeStonecat wrote:Heh..coax...yuck....hated troubleshooting large networks of coax....T-bars or term caps...process of elimination sucked.

This was the reason inductive amplifiers (tone generators) were invented!

Blisster · Post by **Blisster** » Wed Dec 12, 2007 12:36 pm

lol, whats up cable nerds. JCOS, you shoud see the wire plant on one of the sites at the company i work for now, its a 200 year old chateau and the cabling would make you faint.

RoscoPColtrane · Post by **RoscoPColtrane** » Wed Dec 12, 2007 7:36 pm

B std : White Orange, Orange, White Green, Blue, Wh Blu, Green, Wh Brwn, Brwn.

A Std : Wh Green, Green, Wh Orange, Blue, WH Blue, Orange, Wh Brn, Brn.

and yes the orders do matter. Some devices no, some yes. Only ran into a few times. Pinned out to a straight through but didn't have either std. Reterminated to B std (FTW!) and it came right up. I think longer the distance and faster the speed more it matters!

1,2,3,6 matter for the 10/100

RoscoPColtrane · Post by **RoscoPColtrane** » Wed Dec 12, 2007 7:37 pm

Joint Chiefs of Staff wrote:This was the reason inductive amplifiers (tone generators) were invented!

Warble, warble,warble....

Joint Chiefs of Staff · Thu Dec 13, 2007 6:32 am

Blisster wrote:lol, whats up cable nerds. JCOS, you shoud see the wire plant on one of the sites at the company i work for now, its a 200 year old chateau and the cabling would make you faint.

Hiya Jack! My specialty was cleanups and upgrades/integrations on Networks/PBX. I swear I miss it! The trick is keeping systems up and running when rewiring. skillllzzzz brother

Joint Chiefs of Staff · Thu Dec 13, 2007 6:34 am

RoscoPColtrane wrote:I think longer the distance and faster the speed more it matters!

It's all in the UTP BABY! The tighter the twist yada yada yada