RE: T1 short-haul vs. long-haul
Christopher Woodfield wrote: In the interest of complicating things further, I think you have NIU and smartjack backwards in your explanation
You think, which is a good beginning. Seeing it with your own eyes might be 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.jpg These 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.jpg
From 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 customer and/or contractor to punch it, which typically produces a smartjack like this :-) 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.
hate to say it but what is pictured is not a smart jack, it is as you say a glorified patch. a *TRUE* smart jack DOES have the tiny bit of circuitry necess'y to cause it to loop the line back when nothing is connected to it, some can do it via line signaling as well. in some telco territory what they call a smart jack is, most certainly, NOT. as always, YMMV, SBC/PacBell in SFO area usually does use a true smart jack, but not always. out of a number of t-1s installed for both voice and data while working at 2 Connecticut i was about 80/20 in favor of smart jacks. --On Thursday, July 22, 2004 21:15 -0700 Michel Py <michel@arneill-py.sacramento.ca.us> wrote:
Christopher Woodfield wrote: In the interest of complicating things further, I think you have NIU and smartjack backwards in your explanation
You think, which is a good beginning. Seeing it with your own eyes might be 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.
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 explanation
You think, which is a good beginning. Seeing it with your own eyes might be 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.jpg These 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.jpg
From 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 customer and/or contractor to punch it, which typically produces a smartjack like this :-)
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.
participants (3)
-
Christopher Woodfield -
Michael Loftis -
Michel Py