[asterisk-users] Dry Copper Pair

[Jon Pounder]

Quoting Greg Oliver <greg.oliver at cistera.com>:

> On Fri, 2007-05-11 at 18:44 -0400, Jon Pounder wrote:
>> > On 5/11/07, Alex Balashov <abalashov at evaristesys.com> wrote:
>> >> On Fri, 11 May 2007, C F said something to this effect:
>> >>
>> >> > Not according to Verizon (in my area anyhow), We tried it and it
>> >> didn't
>> >> > work. The verizon technician insisted it wasn't real PTP copper and
>> >> > therefore anything but analog voice might/should not work.
>> >>
>> >>    What is "PTP copper"?  Unless it's an issue of gauge.  But as far as
>> >> I
>> >> know, it's not.  All the standard copper used for POTS can be used for a
>> >> T1 from a physical point of view, other aspects of conditioning/load
>> >> coils/etc/etc not withstanding.
>> >
>> > You are right, but that was not what I meant, in order for one to be
>> > able to provision their own T1 over a pair of copper, the line has to
>> > allow all traffic over all frequencies pass thru it. Which these lines
>> > do not, since they are simply not just one long copper pair simply
>> > cross connected.
>>
>> that's what "dry copper" is supposed to be, just a cross connect between 2
>> pairs out of the CO. ie not even battery, line test equipment, or anything
>> else hanging off it at the CO. any restriction should be purely a function
>> of the inductance/capacitance of the wire and the connections and nothing
>> else - anything else and you didn't get "dry copper" in the first place.
>>
>>
>> just out of curiousity - anyone ever hijack pairs and get away with it ?
>> (do your own cross connects on the street and utilize some crossconnect
>> all within one branch of F1 cable out of the CO ?)
>>
>> I've been tempted in the past, and know that at least around here I would
>> probably get away with it for quite some time before anyone actually cared
>> enough to investigate.
>>
>
> Hmmm, I can see cross connecting an F1 to the F2 to your home/business,
> but you would have to have a friend @ the CO to make anything of use on
> it right?  Someone has to connect it to their frame in the CO, or
> xconnect it to another F1 out??  If there is a telco with "live"
> dialtone on F1 unprovisioned pairs, I would be shocked (or want to move
> there :)  )

well actually there is dialtone on the unprovisioned pairs for the  
most part, but you can only dial repair, the telco office or 911 on  
them. I am not sure if its all pairs or just pairs that had a line  
provisioned at one time. ANAC just replys with some error message if  
you try to determine the phone number of the line.

What I am talking about though is if you want to run dsl or some other  
highspeed type of thing or just an analog pair to a neighbour, or  
another office in the same neighbourhood, complex etc. All you do is  
put your tone generator on an empty pair at both locations trace down  
till you find them in the same F1/F2 box, and jump across them. (no  
connection to or through the CO, but only possible if both areas are  
served by the same F1 cable.) Around here at least, the worker who  
actually gets the work order for an analog install is told the frame  
port and corresponding F1 pair, and they just find a free F2 pair and  
use it, so unless they happened to notice the cross connect between 2  
F2 pairs, or even noticed it and cared, who would know ? Actually it  
would probably take some investigation to even tell if its a  
legitimate bridge tap or the left overs of one or just something that  
is not supposed to be there at all. In a world of if its not broke  
don't touch it, it would likely never get touched.

Even on a lower level, if you want cable between immediate neighbours,  
just make a cross connect at the nearest pedestal or overhead box if  
you both are served from it and have a spare pair in your lateral  
cables.



Here's some food for thought - around here at least where there is  
buried telco fibre, the splices are done in pedestals that don't even  
have locks on the doors, just a screen door type latch, might keep a  
racoon out but that would even be pushing it. The copper is a little  
more secure, you have to carry a  nutdriver to give the latch a  
quarter turn. I guess if you are resourceful enough to have a  
nutdriver, they trust you poking around in their boxes.

Wear a hardhat and toolbelt with a butt set hanging off it, and you'll  
easily penetrate the collective :) I've had many a conversation with a  
telco installer and for the most part if you know what you're talking  
about they practically invite you to help yourself if you want to poke  
around, modify your cabling etc., just don't say they told you that or  
complain if you break it ....









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Jon Pounder

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