nanog mailing list archives
Re: T1 short-haul vs. long-haul
From: Christopher Woodfield <rekoil () semihuman com>
Date: Fri, 23 Jul 2004 14:50:32 -0400
I think we can probably chalk this up to a difference in dialect, for lack of a better word...what you're calling an NIU is exactly what I would call a smartjack and vice versa. Can you point to any sort of "official" documentation that defines these? I'm looking to see if anyone in my office has a Newton's as I speak...
-C On Jul 23, 2004, at 12:15 AM, Michel Py wrote:
Christopher Woodfield wrote: In the interest of complicating things further, I think you have NIU and smartjack backwards in your explanationYou think, which is a good beginning. Seeing it with your own eyes mightbe of some interest, NTM that doing it for a living for 20+ years may give new an entire new outlook on it. For the entertainment of non-american readers, wannabes, and rookies I stopped by a T1 MPOE on my way home and took a few photos. http://arneill-py.sacramento.ca.us/photos/smartjack1_lr.jpgThese are smartjacks, RJ48. Two are connected (grey cable, on the right,going directly to the CSU/DSU). The red/violet pairs on the right come from the NIU. http://arneill-py.sacramento.ca.us/photos/smartjack2_lr.jpg A little more detailed. As you can see, there is nothing smart about these, it's a glorified patch panel. http://arneill-py.sacramento.ca.us/photos/smartjack3_lr.jpgFrom a distance. The white punch blocks are called "66 blocks".http://arneill-py.sacramento.ca.us/photos/smartjack4_lr.jpg Sometimes the LEC does not install a smartjack, leaving the customerand/or contractor to punch it, which typically produces a smartjack likethis :-) http://arneill-py.sacramento.ca.us/photos/niu1_lr.jpg A very common NIU with the Adtran modules. Each board is basically an HDSL "modem", has lights and can be looped. Also present an RS-232 port for configuring it with a laptop and the drop banana jacks to plug your BERT tester. http://arneill-py.sacramento.ca.us/photos/niu2_lr.jpg Another variation of NIU, very common too. Both NIUs receive power from the telco. Here are the hires: http://arneill-py.sacramento.ca.us/photos/smartjack1_hr.jpg http://arneill-py.sacramento.ca.us/photos/smartjack2_hr.jpg http://arneill-py.sacramento.ca.us/photos/smartjack3_hr.jpg http://arneill-py.sacramento.ca.us/photos/smartjack4_hr.jpg http://arneill-py.sacramento.ca.us/photos/niu1_hr.jpg http://arneill-py.sacramento.ca.us/photos/niu2_hr.jpg If I have time tomorrow I will post some pictures of an extended DS-3 demarc at a remote site. Michel.
Current thread:
- RE: T1 short-haul vs. long-haul, (continued)
- 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)