sundance-communications.com/forum Forums Wiring - Telecom Carriers - Trunks & Services Cabling Telephones Systems Wiring different wiring standards for different pbx's?

I came across this recently when one of the telcom contractors had a PBX installed and it was wired differently to the bix then what it should have been. He was not aware of this and we kept getting no line battery or tone when terminating it.

So what brands have a different wiring standards to the bix?

Unfortunately, many systems have different wiring schemes. Some may have as few as eight station ports per 25 pair cable. Others may have as many as 24 stations. Some have trunks and stations shared on the same cable. Some use two or even three-pair station outputs.

With that being said, there really isn't a true uniform cabling method for system cables. It all depends upon the system and even the types of cards or modules that are installed.

Even though the acronym "PBX" is often used for a phone system, this is often not the case. Most smaller systems are actually referred to as key systems or hybrids where wiring outputs are anyone's guess.

Ed, are we sure that he's asking about the system cables, and not the station wiring? There are "telcom contractors" out there who are just as clueless about station wiring/jack protocols as are the EC, CG, and RS who plague us.

Interesting thought, Arthur. I didn't think about the station cabling part since so many systems only use one pair. That part would be hard to screw up, but nothing surprises me anymore. I agree that it is much more likely that a contractor is doing the station cabling and not the switch.

You mean, other than using the Green/Orange pair for line 1 and the Blue/Brown pair for line 2?

And twisting all the white ("neutral") wires together in a big wirenut and grounding them?

Are you talking about a BIX demarc or the BIX for the telephone equipment or the order of the way the pairs are tied down?

A BIX block is is BIX block PERIOD.

Wiring of such is the SAME as it would be for a 66 type block.

The order of the pairs is the same as 66 type blocks.

Same way as well for the station pairs.

The only difference for ANY type of block, whether it be a BIX, 66, 110, Krone, or whatever is the "System" blocks. Wiring of the blocks is the same as well. It's just the "Order" or the "Pair Designation" upon the system blocks of the X-connects to which pair of the system blocks, be it for lines or stations.

In other words, it's like Ed stated above, it's the "System" that's connected to the blocks that determines the pair designation...plain & simple. You can't remove a Nortel from the wall and replace it with some other brand without expecting to redo the X-connects.

keystone like nortel or panasonic.

Some tech wired it from the keystone that was wired differently then for that make of unit. The telco contractor had to redo it all over again when our ends never got the battery or tone signal.

Do the varios mfgs such as panasonic have there wiring info in there web sites?

I doubt it. Most likely you'd find the system wiring schematic in the "Installer's manual" for each system.

If you're a 569B guy, then I'd say that Panasonic phones use the green pair (or whatever color pair that flanks the innermost pair).

As a man who has trouble seeing color correctly, I couldn't give a rat if all wires were gray.

Position and function is more important than color, but you're a hero in my book if you can make each element match up.