atcomsystems.ca/forum Forums Wiring - Telecom Carriers - Trunks & Services Cabling Telephones Systems Wiring 568A vs. 568B

A is better for four wire telephones means the blue is on 4&5 and Orange on 3&6 meaning you can use a standard line cords with the 4 conductors in the centre of the RJ 45 plug.

What’s important is to keep track of the pin numbers as long as you have the voice pair on 4&5 and the Data Pair on 3&6 Who cares if the outlets are A or B. I like to use B because it makes more sense to terminate your cables Blue Orange Green Brown.

Anyway who puts in Analouge 4 Wire handsets anymore?

Anyway who puts in analog 4 Wire [phones] anymore?

A phone is not a handset. A handset is the part of the phone that you hold in your hand. Lets get the terminology correct.

Customer calls and says they have a problem with a handset. I drive out to them bring a handset up to the 35th floor only to find a bad phone. Customer says that's what they were talking about.

Many systems do use 2 pair and there are even more out there that you will have to service.

-Hal

Hal, in many other parts of the world a phone is refered to as a Handset......

If you take notice that the person is from Aussy Land. Maybe, just maybe thats what a phone is referred to down under....

Hal, have a shrimp on the barby and relax......

I like to throw analogue 4 Wire Phones on the TIP.

I hardly see any about now.

Although I have been installing some 4 Wire Phones recently (IP Phones!)

Hbiss Sounds like you have to educate your customers not me. I'm sure you had that other piece of Correctly Named Telecommunications Equipment you needed in your Truck?

568a or 568b?
If it is just an add job follow what standard is already in place.If it is a new construction then you set your standard.568a or 568b

Jamey

I've been in the cabling industry for about 12 years as a tech, PM, estimator, and consultant. In all of this time I have rarely seen a 568A install.

This could be because I'm originally from California (just moved).

I think it is more of a regional thing. I hear that on the East Coast 568A is popular.

Both standards are a straigh-through pinout configuration. As long as both sides are termed the same way you will have connectivity.

Most patch panels and jacks these days have color codes allowing either method. Some of the older patch panels have the color-code on the actual plastic 110 IDC terminals. If you have one of these patch panels then you will want to wire it according to the displayed color code. Flipping the orange and green in this instance could cause confusion to the next person who sees it.

I USE 568B 99.9% OF THE TIME