sundance-communications.com/forum Forums General General Telephone & Systems Information New Digital system on older JK or D station Wire?

Does anyone have any experience installing a modern digital PBX on older JK or D type station cable. I have a 100 phone prospect with an older Rolm that is using JK wire. They really don't want to re-wire for all of the stations and they will not consider IP as an option.

Apparrently we are the only dealer that has expressed any concern with the existing station cable.

If there is any handbook or whitepaper or other resources out there that I can point the prospect to with regards to potential problems using a modern digital PBX on JK wire, I would love to know about it.

Handbook or white paper? You're kidding me right? Nobody else has a concern because they know there should be no problem assuming the wiring is in decent shape.

The world did function before CAT5 you know.

-Hal

CAT 3 cable will support digital phones quite nicely.

If it's true 4 conductor JK wire that's not twisted as much as Cat 3, will that matter for single pair digital phones? I doubt it.

Probably Depends on the system...ESI and Comdial(Vertical) would probably be ok.

I would not guarantee it. Just because.

Brian, You are an old Executone guy. Remenber the old Gateway system? Matsushita sent an engineer to the states to help the dealers with trouble sites. We were all informed then that we had to quit using quad and switch to twisted pair. The twisted pair in '83 was probably only Cat 1 at the time, but it corrected some problems that various sites had.

Now on the other hand, the old digital SRX we also sold worked just fine on anything. I think it would have even worked on lamp cord! So bottom line, is that it probably depends on the system.

It depends upon what kind of station sets are being used, but I still doubt that JK would cause an issue with even the most sensitive sets. Digital systems are a LOT more tolerant of wiring issues than the manufacturers lead us to believe. They build in limitations in their specifications in order to minimize nuisance technical support calls.

There are literally thousands of motels/hotels in this country that are wired with JK for the room and administrative phones. Rolm phones, especially back in the 7000/8000/9000 days were extremely tolerant to even thousands of feet of bad cable, be it aerial, underground, along a fence, in a ditch, etc.

Brandon, you mentioned a digital system, but didn't mention what type of station sets are being used. If they are analog single-line sets, like Dave said, you can even run those with lamp cord or speaker wire.

We are looking to replace an old Rolm with a new NEC. A majority of the handsets (approx 100) will be digital (6 buton, 12 button, 24 button). All of the current JK cable is untwisted 2 pair (red, green, black, red).

I've had no problem installing Panasonic, ESI, and Nec Dsx on jk cable. But I would ask the manufacturer and see what they say, especially with 100 phones.

Why don't you go out there with a little ksu and one phone and try it out?