T-carrier [rss]

PodSnacks: T-1 vs. PRI

Posted Tuesday, July 08, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q3/t1_vs_pri.mp3
Recently, we posted a few PodSnacks on voice-related issues, including long distance (LD) and switched vs. dedicated access to LD. Today we're going to focus on trunking services and talk about the difference between a T-1 and a PRI trunking service. Read More...

PodSnacks: High-bit-rate Digital Subscriber Line (HDSL)

Posted Thursday, May 29, 2008 6:00 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2008q2/hdsl.mp3
Today we shift our gears a bit to look at a technology that emerged in the late 1980s as a way to reduce the cost of provisioning a T-1 . Known as High-bit rate Digital Subscriber Line (HDSL), this technology, and later versions of it, have made true Read More...

PodSnacks: CSU and DSU

Posted Friday, August 17, 2007 7:35 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/csu-dsu.mp3
And now for something a bit different. I'm getting a little sick of themes, so I thought I'd role the dice this morning and randomly pick a topic. If you use a DS-0, DS-1, or DS-3 service, then somewhere in your network you have a CSU / DSU . Read More...

PodSnacks: Primary Rate Interface

Posted Thursday, July 26, 2007 8:14 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/pri.mp3
Yesterday, Peter gave us the low-down on the Basic Rate Interface (BRI). This is only one of two ISDN interface options. The other one is the Primary Rate Interface (PRI). In North America, the PRI is provisioned over a T-1 . Like the BRI, the PRI supports Read More...

PodSnack: T-3

Posted Tuesday, July 10, 2007 7:20 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/t-3.mp3
Thanks to Paul, we can add one last little snippet of information to that series on T-1 that we did. Anther T-carrier system that is widely implemented and sold by the carriers is T-3 . A T-3 is a higher-speed TDM circuit that has the capacity for 28 Read More...

PodSnacks: Superframe vs. Extended Superframe

Posted Wednesday, July 04, 2007 8:13 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/t-1_framing.mp3
Happy 4th (if you're from the U.S.)! Yes, yes, I know you're impressed that we keep plugging on even on holidays. That's just the way we are here at Hill Associates. Actually, we're smarter than that. We prepare the snack in advance so Read More...

PodSnacks: Robbed-bit Signaling

Posted Tuesday, July 03, 2007 8:01 AM by mgilbert :: 5 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/robbed-bit.mp3
Yesterday we talked about the difference between in-band , and out-of-band signaling. This concept sets the stage for talking about a particular form of in-band signaling used on a T-1 . This form of signaling is called robbed-bit signaling and it is Read More...

PodSnacks: In-band vs. out-of-band signaling

Posted Monday, July 02, 2007 8:09 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q3/in-band_out-of-band.mp3
You still with us? Today, we continue the series on the T-1 with a look at the general notion of how signaling can be related to the transmission system and the user's data. Because a T-1 is so often used as a trunking facility between a CO switch Read More...

PodSnacks: ZCS vs. B8ZS

Posted Friday, June 29, 2007 8:55 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q2/zcs_b8zs.mp3
Yesterday, we spent some time looking at the requirements for ones density on a T-1 . We saw that this requirement is met by the voice encoding process when the T-1 is carrying voice, but we noted it is problematic when the T-1 is carrying data. Today Read More...

PodSnack: Ones Density

Posted Thursday, June 28, 2007 8:53 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q2/ones_density.mp3
We are in the midst of a series on the T-1 transmission system. Today we tackle the concept of ones density . In a nutshell, ones density is a requirement that the transmission stream on a T-1 always maintain at least a minimum percentage of ones. There Read More...

PodSnacks: T-1

Posted Wednesday, June 27, 2007 9:10 AM by mgilbert :: 0 Comments
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Attachment(s): http://podcast.hill-vt.com/podsnacks/2007q2/t-1.mp3
Today we start a new series, and it will be focused on the T-carrier transmission systems, beginning with the T-1 . This series is inspired by some of the questions that arose last week in a class that I taught. Today we'll start with an overview Read More...