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Telco companies are using outside NID's as T1 Smart Jacks more and more. This cuts down on the Telco installers time from installing inside wiring, but it leaves the end user to finish the job.

Below is a how to for extending the T1 from the NID to the Demark inside the building. I will use the Westell DuetPak as the NID example.

Here is a picture of the Westell NID:


Here is a Spec Sheet for this NID.

As you can see the T1 boards are installed in the left side of the NID and routed through to the right side via an RJ45 jack.

The first thing you should do is grab a pencil and paper and mark down which pair will be the Rx and Tx to extend. What colors are going from the NID and what color the 25 pair will be spliced to. I also recommend killing the extended current by removing the RJ45 male end that is between the right and left side of the 4 posts you will be working with.

Before you start the run make sure to trace all your pair and mark them.

Using 1 and 2 (Black and Yellow) on the right side of the NID as Rx and 4,5 (Green and Red) as the Tx end.

Here is a drawn picture of the NID above with extended pair that will be spliced to the Telco 25 twisted pair and will run to the Demark 66 block inside the building.


This is with the 25 twisted pair spliced:


From here you will continue the run to the 66 Block at the demarcation point. This is what it will look like with the left side being the Telco side and the right side will run to your T1 Jack.

The right side of this 66 block will run to your T1 Jack and in the end will look like this:

In the end what is being accomplished is an extension of electricity from the origin (or close enough) to the end point. So just try to keep all the wire colors consistent so you can follow them start to finish. Mark your wires at the NID, 66 Block and label the jack when you are finished then hook it up to your router and you should be good to go.

JS

There are multiple ways to install a NID splitter, but they all come down to the same thing. You want to separate the Voice, Data, and Network signals.

Sometimes there is static on the phone line or the fax machine will knock off the DSL connection among a host of other things that could confirm a reason to installing a NID Splitter.

I am using a scenario that involves a generic 66 block that you find on most Demarks, a Suttle Outdoor NID Splitter and a 4 post telephone jack or biscuit.

First thing you need to do is find the circuit that the DSL line is sharing. Sometimes it's marked and sometimes it is not. That is when you need a butt set to test the circuit. Connect your alligator clips to the 66 Block and get a drop tone and verify the circuit by calling 1-800-444-4444. This number will spit back the phone number MCI sees on their end.

If you are on the correct circuit and there is no dial tone verify with the Internet Service Provider (ISP) that you are not using dry loop DSL. If you are using a dry loop DSL there should be no reason to install a splitter, but I've seen crazier things happen.

Please take a look at my other posting on how to make a homemade Lineman's head set or butt set in one of my earlier posts if you don't have one or yours is out of commission for the moment.

Once you find the circuit take a look at how it is being used. It could be used for just the main land line or possibly the fax line. Then you will want to run this first to your voice side in the splitter all the way down to the biscuit.

Verify that you have connectivity at the splitter on the Voice Posts with another phone or your butt set. This way you know you are getting an electrical current all the way from start to finish.

After that it is all down hill. Connect a run from the 66 block to the Data posts and connect your last run from the 66 block down to the network posts.

Below is a picture of one type of proper split set up.
I hope this makes some sense to those reading. It looked much better when I created it...

The 66 Block is labeled. The NID is between the two with the 6 posts on it. Those are the Network, Voice and Data posts.

Row 1 Column 2 on the 66 Block is using a Blue and White cable and Row 1 Column 3 is using an Orange and White cable. Row 2 Column 2 is using a solid Blue cable and Row 2 Column 3 is using a solid Orange cable. (Just for clarification)

The color of the cable DOES NOT MATTER. Just keep them the same for simplicity and future use. Make sure you label the jacks if they were not before. Remember this is just ONE of many ways to install a NID Splitter. It all depends on the situation presented to you at time of install.

JS