sundance-communications.com/forum Forums Wiring - Telecom Carriers - Trunks & Services Cabling Telephones Systems Wiring T1 connection help

Hi,

I could use a little help if anyone has info for me. I am a bit of a noob on this.

I have a T1 line that has a RJ48 jack in a telco room. The problem is that I need to connect it to another suite's telco room in another building.

I was told to take the Rj48 jack and wire to the free pairs and then align those pairs with the pairs on the block in the customer suite and just punch it down.

Which wires from the 48 do I connect to the 66 block in the first room and then which ones do I connect to on the other suite? I know which 66 in the first room goes to in the second. I just don't know how to do it and think I may be a little over my head. I am supposed to do this on Thursday.

Thanks for your time.

Can you just run a Cat 5 cable between the two? That is what we would do. That way you want have to worry about someone putting a toner on the 66block or any interference issues.

Unfortunately, No. The buildings are not connected and they are about 200 ft apart.

You use pins 1&2 and 4&5 on the 8pin jack. 1&2 are your receive. Label them good, there used to be some red plastic clips you could put over the pins on the 66 block to let other know they were special pairs, don't know if they are still available or not.

Is this a tagged circuit?

You may want to inform the provider of the move or even let them do it. If there is trouble down the line you might find it hard to get them to work on it.

Just a thought.

I assume you have a cable running to the new location. If so is it buried or aerial? either way you will want to protect your equipment with the proper lightning protection.

Also, make sure that the jack that you install has the appropriate shorting bars to provide a real RJ48X. If you just put a plain jack, there's a risk of the circuit going out of service if a loopback isn't created when the equipment is unplugged.

200+ feet on the output side of the carrier's smart jack might cause problems as well unless the line buildout (LBO) settings are set to compensate for that length. Usually, 133 feet is the maximum set by the carrier. Pushing this limit will likely result in errors and problems that can't easily be identified.

I agree that it's probably going to be best to let the carrier relocate their circuit to the proper building so that they are responsible for it. If you aren't really familiar with T1 circuits, you'll likely be chasing your tail with phantom problems. It's not worth the risk in my opinion.

As ed said above you need to get with the telco and verify the output of the smartjack.

The Limitations of an extension outside of a smartjack are a maximum of 655 feet from the Smartjack. This is direct cable run no terminations in the middle.

The pins you will terminate are 1&2 orange pair and 4&5 blue pair. This is on a 568B head. You will want to put the RJ48X at the far end of the extension.

After you make the extension plug in a banjo and put a multimeter on pins 1&2 and 4&5. You should see a short across the pair to verify connectivity back to the smartjack.

But just to reiterate. Verify the output of the smartjack is set for the footage of the extension. Usually set for 0db in my area but is different for all areas and technicians.

I agree with those of you that said let the telco do it, but they won't. They said that we had to wire it from where it is. So we have to go from the smart jack to the 66 to the other 66 then to a jack to the router.

Thanks for the responses so far, they all have provided me with needed info.

I refuse to believe to telco won't move it..(no disrespect intended), but in our area if nothing else they will 'lay something on the ground' until they can dig.


but like i said... 9yrs and ohh so green.

I can believe it. I've seen many cases where the LEC wouldn't extend the DEMARC or move it.