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extended demarc 1
- Thread starter samuri
- Start date
Normally your Telco places the smart jack at their demarc location and if the customer wants an extended demarc they will run the wire and place an rj48x at your location, or the customer or their vendor will extend from that point.
I've seen it where customers or their vendors have moved it and the local telco has forced them to move it back.
Also depending on what feeds your building, copper/fiber/mux? 750 feet may cause some problems?
I've seen it where customers or their vendors have moved it and the local telco has forced them to move it back.
Also depending on what feeds your building, copper/fiber/mux? 750 feet may cause some problems?
LeeMcCauslin
MIS
I moved a smart jack once. From the front of a strip mall suite to the back. The signal and power were coming in from another suite on cat3 cable. Luckily, the incoming feed was just loose cable strung through the drop ceiling from the back to the front so I had plenty of leeway moving it back. I just looked at how the wires were connected to the jack (if I recall correctly, 3 wires screwed into connectors inside the box) to remember how to put them back, disconnected them and moved everything to the back wall.
But the thing to watch out for is this:
One of those wires is HOT! Shocked the bejeezuz out of my dumb self. My co-worker still laughs at me about that.
But it worked.
But the thing to watch out for is this:
One of those wires is HOT! Shocked the bejeezuz out of my dumb self. My co-worker still laughs at me about that.
But it worked.
strmwalker
Technical User
samuri..GMgerry is once again very right you can not
move a local companys equipment, but you can extend the demarc.by this i mean run a cable from their equipment
to your new location.one problem you can occur by doing this
is if you are moving a special circuit t1,pri .they are
sometimes engineer to only work so far from the central office
and the network eguipment.
no problems only solutions
strmwalker
move a local companys equipment, but you can extend the demarc.by this i mean run a cable from their equipment
to your new location.one problem you can occur by doing this
is if you are moving a special circuit t1,pri .they are
sometimes engineer to only work so far from the central office
and the network eguipment.
no problems only solutions
strmwalker
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1
- #6
mikeydidit
IS-IT--Management
samuri
What I do here is run a 2 pair shielded cable to where I need the circuit. Then i will place the proper ends on the cable (solid cable plugs in this case) RJ-45 to our networking gear. This lets me extend the circuit without actually moving the demark. It is a bit of a pain vs. having the demark in our server room, but these are usually placed in a centrally located location in able to feed more than one place.
Hell, there are no rules here - we're trying to accomplish something.
Thomas A. Edison
For the best response to a question, read faq690-6594
What I do here is run a 2 pair shielded cable to where I need the circuit. Then i will place the proper ends on the cable (solid cable plugs in this case) RJ-45 to our networking gear. This lets me extend the circuit without actually moving the demark. It is a bit of a pain vs. having the demark in our server room, but these are usually placed in a centrally located location in able to feed more than one place.
Hell, there are no rules here - we're trying to accomplish something.
Thomas A. Edison
For the best response to a question, read faq690-6594
- Thread starter
- #7
mikeydidit
IS-IT--Management
I am not sure I would say "it is a must", but IMO it is the best method to help prevent cross talk and noise between circuits.
Hell, there are no rules here - we're trying to accomplish something.
Thomas A. Edison
For the best response to a question, read faq690-6594
Hell, there are no rules here - we're trying to accomplish something.
Thomas A. Edison
For the best response to a question, read faq690-6594
- Thread starter
- #9
EddieDuece
IS-IT--Management
PRI's are 2 pair (4 conductor) connections. They are commonly terminated on RJ48c type ends. The only difference between a RJ48c and RJ 45 is that the RJ48c is a keyed type of connector. Not really that important in the overall scheme of things. A RJ45 can actually plug into a RJ48c type jack. A RJ48c annot plug into a RJ45 though because it has a little plastic piece on the side of the connector. That is the only difference between the two types.
LkEErie, the shorting bars are for fire alarm type jacks, so they can seize the trunk when teh dialer goes off hook.
LkEErie, the shorting bars are for fire alarm type jacks, so they can seize the trunk when teh dialer goes off hook.
EddieDuece ----- For your info there is a big difference in the actual wiring between RJ45's and RJ48's
RJ45's are normally used as subrate digital handoffs 64K and down and are wired on pins 1,2 and 7,8
RJ48's are used for T1's-PRI's etc and are wired on pins 1,2 and 4,5
And the RJ48X has a shorting plug for testing purposes, you remove your cord from it and it places a loopback towards the Telco if they wire the jumpers correctly.
RJ45's are normally used as subrate digital handoffs 64K and down and are wired on pins 1,2 and 7,8
RJ48's are used for T1's-PRI's etc and are wired on pins 1,2 and 4,5
And the RJ48X has a shorting plug for testing purposes, you remove your cord from it and it places a loopback towards the Telco if they wire the jumpers correctly.
Sigh,
Eddie, I know the difference between RJ-31x and RJ-48. I did the homework.
describes the difference between Rj-48c and RJ-48X. I still have a ton of 31x's on the shelf from the old dialer and alarm days.
LkEErie
Eddie, I know the difference between RJ-31x and RJ-48. I did the homework.
describes the difference between Rj-48c and RJ-48X. I still have a ton of 31x's on the shelf from the old dialer and alarm days.
LkEErie
- Thread starter
- #15
Thanks for all the good info. I know most data circuts are two pair 4 wire these are one pair two wire. The telco tech told me to run rj48 two pair 1,2 and 4,5. What i did is run straight form the smartjack instead of to a biscuit i dont know if this makes a difference but the telco tester tells me he cant see past the smartjack. Also the 4 pri,s voltage tests between 128.5 and 185 volts?
EddieDuece
IS-IT--Management
I'm talking the physical end on the extended cable, not wiring schemes guys! The wiring will utilize pins 1&2, 4&5. 7&8 will get you nowhere! Keep up the homework.....you'll get there.
DON'T move the NIU, unless you're the telco. Call the carrier and request they move it. If they want to charge you, call an experienced cabling contractor and have them run a T1 cable for you, it will be cheaper than the carrier.
As far as the "single pair PRI", I'm assuming you mean the telco is using a single pair from the outside world to the smartjack; in which case, they are using a PairGain or similar carrier system to conserve cable pairs in the outside plant (5-10 grand for a PairGain is WAY cheaper than digging up the street). This doesn't change the CPE (your) interface, that's still 2 pairs (T, R, T1, R1).
As far as the "single pair PRI", I'm assuming you mean the telco is using a single pair from the outside world to the smartjack; in which case, they are using a PairGain or similar carrier system to conserve cable pairs in the outside plant (5-10 grand for a PairGain is WAY cheaper than digging up the street). This doesn't change the CPE (your) interface, that's still 2 pairs (T, R, T1, R1).
From what I have seen with Verizon in NYC, they will allow you to extend the DMARC BUT(here is where it gets interesting) they will not support any wiring beyond their original DMARC point. If you have issue with the circuit they will test to the smartjack or perhaps only the T-1 channel bank and declare the circuit is good and perform no other action. Check with your local carrier and ask them what their policy is, and if you have done this in the past follow their requirements. Otherwise have them move the circuit and they will usually take resposibilty for all the wiring.
I wish I knew how to post a picture here. I just had to do an emergency repair at one of our sites under renovation. A backhoe ripped the cable out from the pole to the building. AT&T said it would be about three weeks to replace (*^$#@&%). So I strung a cat 6 about 400 feet into their protector and 200 more feet of a cat 3 25 pair and it works great. Not recommended but it works.
Can someone help with posting a picture? It’s worth the look.
Can someone help with posting a picture? It’s worth the look.
LeeMcCauslin
MIS
the following in your post will put a picture of a frog in it:
(remove all the * - I had to put them in so you could see the code)
Like this: [*img* ]
What you need to do is get your picture online somewhere (I use Imageshack but you can use photobucket or any other free image hosting service) - then substitute the direct link to your image for where the froglink is up there.
your tag would be
(remove all the * - I had to put them in so you could see the code)
Code:
[*img* [URL unfurl="true"]http://www.tipmaster.com/images/frog.gif*[/URL]]Like this: [*img* ]
What you need to do is get your picture online somewhere (I use Imageshack but you can use photobucket or any other free image hosting service) - then substitute the direct link to your image for where the froglink is up there.
your tag would be
Code:
[*img* [URL unfurl="true"]http://www.yourlink.com/yourpicture.jpg[/URL]]- Status
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