What is the "demarc"?
The demarc is the service demarcation. On your side of the demarc, things are your responsibility. On the telco side of the demarc, it's your provider and/or the LEC responsibility. http://192.20.13.157/planner/tab003a.pdf look at figure 1 http://192.20.13.157/planner/tab003b.pdf look at figure 1 http://192.20.13.157/planner/ip.html [note: this is for AT&T, but other carriers are similar]
Is it the jack/punch-block where the SmartJack is connected to?
Maybe, maybe not.
What is an "MPOE"?
Minimum Point Of Entry. That's where the LEC brings the cables from the street into the building. Unless you own the entire building, this typically is a closet (on the first floor, no temperature control) that the building manager and/or every tenant will have access to and that is not located in your office.
What is the "NIU"?
The box that converts the signal from the street (that can run for miles) into the signal you find on the smartjack (that can only go a few hundred feet). Although I don't like the term, it's some kind of a digital modem. The smartjack is dumb (no lights); the NIU is the brains of the smartjack, what has the lights and can be looped.
Where is the SmartJack normally located? In your offices or somewhere else in the building (maybe some room where the cable to the CO is terminated)?
- If you don't ask for extended demarc, it will be located in the MPOE room. - If you do ask for extended demarc (which I strongly recommend), either the smart jack will remain in the MPOE and your provider will bring a router (which becomes the demarc) in your office, or your provider will extend the smartjack (which will remains the demarc) in your office. Whether or not they move the NIU (which is preferred since you can look at the lights but will be difficult) or only move the jack itself is not your problem, all you really care is that they move their responsibility line, the demarc. You want the location of the demarc in WRITING. What you want is your provider to be responsible for the circuit coming into YOUR office, not the building. If you don't have this, you will get that:
David Lesher wrote: They all have finger splints from overuse; pointing to each other.
No comment. And some of that:
Mark Radabaugh wrote: The usual method is to declare no trouble found and close the ticket (especially if the ticket is approaching 24 hours....).
a.k.a. "It works on my side". Also common is the "problem fixed while testing": there was never anything wrong but it started working again when they begun to test :-D Michel.
In the interest of complicating things further, I think you have NIU and smartjack backwards in your explanation...the smartjack has alarm lights and can be remotely looped by the telco via ESF loopcodes; the NIU (also known as an RJ48X) is the dumb wiring box. In my experience, smartjacks are placed on the line at the MPOE, and extended demarcs are presented on RJ48X jacks. In the past few years, I've seen more and more T1s delivered without a smartjack; the circuit is simply presented on the RJ48X, which will loop back towards the telco if there's no cable plugged into it. I'm not in provisioning, so I don't know whether or not telcos charge more for smartjacks than they do for RJ48X jacks, but if you can get one, do. Having to drive to the office to yank a cable so the telco can test your line can kinda suck. -C On Jul 22, 2004, at 11:31 AM, Michel Py wrote:
What is the "NIU"?
The box that converts the signal from the street (that can run for miles) into the signal you find on the smartjack (that can only go a few hundred feet). Although I don't like the term, it's some kind of a digital modem. The smartjack is dumb (no lights); the NIU is the brains of the smartjack, what has the lights and can be looped.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Michel Py wrote: |>What is the "demarc"? | | | The demarc is the service demarcation. On your side of the demarc, | things are your responsibility. On the telco side of the demarc, it's | your provider and/or the LEC responsibility. | | http://192.20.13.157/planner/tab003a.pdf look at figure 1 | http://192.20.13.157/planner/tab003b.pdf look at figure 1 | http://192.20.13.157/planner/ip.html | [note: this is for AT&T, but other carriers are similar] | | |>Is it the jack/punch-block where the SmartJack is connected to? | | | Maybe, maybe not. | | | |>What is an "MPOE"? | | | Minimum Point Of Entry. That's where the LEC brings the cables from the | street into the building. Unless you own the entire building, this | typically is a closet (on the first floor, no temperature control) that | the building manager and/or every tenant will have access to and that is | not located in your office. | | |>What is the "NIU"? | | | The box that converts the signal from the street (that can run for | miles) into the signal you find on the smartjack (that can only go a few | hundred feet). Although I don't like the term, it's some kind of a | digital modem. The smartjack is dumb (no lights); the NIU is the brains | of the smartjack, what has the lights and can be looped. | | |>Where is the SmartJack normally located? In your offices |>or somewhere else in the building (maybe some room where |>the cable to the CO is terminated)? | | | - If you don't ask for extended demarc, it will be located in the MPOE | room. | | - If you do ask for extended demarc (which I strongly recommend), either | the smart jack will remain in the MPOE and your provider will bring a | router (which becomes the demarc) in your office, or your provider will | extend the smartjack (which will remains the demarc) in your office. | Whether or not they move the NIU (which is preferred since you can look | at the lights but will be difficult) or only move the jack itself is not | your problem, all you really care is that they move their responsibility | line, the demarc. You want the location of the demarc in WRITING. | | What you want is your provider to be responsible for the circuit coming | into YOUR office, not the building. If you don't have this, you will get | that: | It is also worth noting that in some buildings, the owners or management group will not allow the telco or provider to extend the demarc. This is particularly true in multi-story and high-rises in metro areas where they want to control access to the building risers. This allows them to make money off bringing the circuit from the MPOE to the wiring closet on your floor. Of course they typically hire a company that does that so you have yet another player involved in troubleshooting a faulty circuit and coordination during install. - -- ========= bep -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.2 (MingW32) iD8DBQFA//18E1XcgMgrtyYRAhk4AJ9gs5PIMwOu/EoRa4T/VbraABtyeQCeKyWv 29CxE2vv7fb7GGmQudVFBaE= =4d4I -----END PGP SIGNATURE-----
participants (3)
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Bruce Pinsky -
Christopher Woodfield -
Michel Py