nanog mailing list archives
Re: T1 short-haul vs. long-haul
From: Christopher Woodfield <rekoil () semihuman com>
Date: Thu, 22 Jul 2004 13:43:08 -0400
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 formiles) into the signal you find on the smartjack (that can only go a fewhundred 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.
Current thread:
- Re: T1 short-haul vs. long-haul, (continued)
- Re: T1 short-haul vs. long-haul Wayne E. Bouchard (Jul 21)
- Re: T1 short-haul vs. long-haul Andre Oppermann (Jul 21)
- Re: T1 short-haul vs. long-haul David Lesher (Jul 22)
- Re: T1 short-haul vs. long-haul Mark Radabaugh (Jul 22)
- RE: T1 short-haul vs. long-haul Hannigan, Martin (Jul 21)
- RE: T1 short-haul vs. long-haul Burton, Chris (Jul 21)
- RE: T1 short-haul vs. long-haul Michel Py (Jul 21)
- Re: T1 short-haul vs. long-haul Andre Oppermann (Jul 22)
- RE: T1 short-haul vs. long-haul Williams, Jeff (Jul 22)
- RE: T1 short-haul vs. long-haul Michel Py (Jul 22)
- Re: T1 short-haul vs. long-haul Christopher Woodfield (Jul 22)
- Re: T1 short-haul vs. long-haul Bruce Pinsky (Jul 22)
- RE: T1 short-haul vs. long-haul Michel Py (Jul 22)
- RE: T1 short-haul vs. long-haul Michel Py (Jul 22)
- RE: T1 short-haul vs. long-haul Michael Loftis (Jul 22)
- Re: T1 short-haul vs. long-haul Christopher Woodfield (Jul 23)
- RE: T1 short-haul vs. long-haul Michel Py (Jul 23)
- RE: T1 short-haul vs. long-haul Michel Py (Jul 24)