sundance-communications.com/forum Forums Wiring - Telecom Carriers - Trunks & Services Telecom Service & Providers verizon opx?

Hmmm. I thought those were called Private Lines.

No "private Lines" are ring down circuits or "p-lines' like between stockbrokers and such, and like RBF say "OPX" is off premis extension.

Well, not all private lines were ring-down; wideband broadcast RPU were private lines, too, for example.

But we didn't disagree on what OPX *stood* for, merely on how it was implemented.

Here in NYC an OPX is an Off Premise Extension: A PBX extension that appears at a remote site (a non co-located location). The circuit is delivered via a conditioned leased line connecting the PBX site with the distant end. The circuit usually but not always goes through one or more Central Offices.

Sam

If the circuit resides within the same central office, Verizon's rates for OPX circuits are very reasonable in these parts (just a loop charge for each address). If it spans between COs or God forbid, between LATAs, then they become difficult, if not impossible to obtain. THAT is when the price gets crazy.

Verizon will also lease dry pairs here in Northern VA, but only in 25 pair binders. They won't do singles anymore.

Call the business office and request an OL13C, not an OPX. If you order it by the USOC number, you'll stand a better chance of getting a correct answer.

Wow … This post kind-a got all over the place.

As pointed out several times OPX is an off premise extension. It’s still a valid service. There is a possibility that “dry pair” or alarm circuits can be used to accomplish this for a cheaper rate BUT, it will NOT work if there is any pair gain devices that serve either location (yes dry pairs can be replicated over pair-gain devises on some systems.) So just ordering a “dry pair” if offered would be a crap shoot at best.

Private Line= There are SOOO many flavors available under that generalized category. Private Line voice, Private Line data, 2-wire, 4-wire, point-to-point, multi-point (bridged,) ring downs (aka bat phones) just to name a few. An OPX is only one of MANY that fit in to that category.

Baylink, What you’re talking about with a number appearing at an address that it would not normally appear at (outside of it’s exchange) is an FX (foreign exchange) circuit if you mean one telephone number is appearing at one location… If you mean one number appearing at it’s normal subscriber location AND at a remote location at the same time. Well those are a very OLD way of doing a bridged service and isn’t really done any more. The “bridge lifters” required to do that properly were very long ago discontinued. …And by the way, that should never have been done at a cross-box unless it was a temporary thing for an emergency situation only.

OPXs can be done wholly though LEC’s, can be done intra-office (same exchange) inter-office (different exchanges within one LATA.) If the circuit crosses LATA boundaries it would have to be ordered though an IXC (inter exchange carrier, a long distance company.) The LEC would only provide the two end-points.

OL13C is a FID code… OP, you will need that piece of information if you’re OPX port of you PBX is for loop-start (almost always) and is a “c class” port. (most are as I understand it.)

Good explanation Bryan.

Used to wire in quite a few of these, they worked well. :toast:

Yeah, Bryan clarified it nicely, and yes, what I was talking about was "the same phone line and number appearing at 2 separate premise locations in the same wire center serving area", which is what *I've* always seen called an OPX. They generally just set it up as a separate service, and then multiple them together at the MDF; both ring simultaneously, and if both ends pick up, all parties can speak.

But, given the way it's constructed, obviously it's only useful for the LECs circuits.

I still think the OP would be best off using wifi to solve his actual problem... :-)

I have a OSNA Circuit (OPX) in the same town in many locations..Yes these Circuits are Pricey..Distance is the issue..and the contract as well...You say you have a Nortel...Well..My opinion is Price out an OSNA 4 wire Circuit ( Point to Point) You will need a Small Nortel at the other end...Stations go to Lines..Meaning You will have to Buy another telephone System..I never read how many Stations you need at the other end..Very important!! The OSNA will have to be designed the Correct way..You can intercom ,Transfer call ETC.. Just Tell Your Verizon Rep to "Blow the Dust off the OSNA Design Books"...They provide the service But they will have to Research the Circuit..

westonjoe, I have a site in Wenatchee, WA, with a Verizon OPX running just fine. A-end was originally connected to a Norstar system, now works fine on a ShoreTel system. Z-end is an employee's home office.