Quick! Whip Out Your Bandwidth Calculators!

Marik_Steele

<div class="IPBDescription">How many kb/second can a T1 line handle?</div> I'm writing an article and need to prove that a significant (or insignificant, I'll find out by the figures) amount of a T1 line's bandwidth is consumed by an unproductive network process. I've found that anywhere from 247,500kb/sec to 2,200,000kb/sec could be demanded from the line. [edit]I'm also not sure if it should be a capital or lowercase "k," it's the unit of measurement for typical IE downloads.[/edit] I've also read that a T1 line is theoretically capable of 1.544 Mbps. However, I seem to remember there being a big difference between "bits" and "bytes," so I don't know if my numbers match up in units; heck, I don't even know if the stat I've found for the T1 line is correct.

Answer and be hailed Todays Mastar of Teh Intarweb.

NumbersNotFound

1byte=8bits so divide 1.544 by 8

Zel

internet explorer uses kB, kiloBytes. bandwidth is generally kb, kilobits because the number looks larger and advertizers get off on that.

roadrunner modems are capped ar 3.0mb, which is 3000 kb, which is 375kB in internet explorer speak.

i dont know about t1s, but i hope that helps.

Rob

These guys generally have it.

Bandwidth is measured in bits, but most everything else on a comp is measured in bytes. I'm sure there's a reasonable explaination for this, but my theory, as is Zel's, is they were just trying to make the transfer speeds look bigger back in the days when 28800 bits per second was consider uber fast.

Anyway, max T1 speed is about 1.5 mega bits, so you have to divide that by 8 to get mega bytes per second, then multiply it by 1024 to get kilo bytes.

That's an interesting note, though. While we seem to use metric system (kilo, mega), they aren't perfect 1000's, they are multiples of 8, so remember to go between em using 1024 bytes or bits = 1 kilobyte or bit, 1024 kilobytes/bits = 1 megabyte/bit, etc.

TenSix

According to the Almighty Google:
2,200,000 kilobits = 275,000 kilobytes
247,500 kilobits = 30,937.5 kilobytes
1.54400 megabits = 0.193 megabytes

If you need any other conversions, simply do a google search in the context of: XXXX <unit of measure> to XXXX <unit of measure>

<a href='http://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&q=1.544+Mb+to+MB&btnG=Google+Search' target='_blank'>Example</a>

As far as I know, a T1 line speed is about equal to Cable. See <a href='http://www.t1-t3-dsl-line.com/solutions.php' target='_blank'>this chart</a> for maximum speeds. There are different types of T1 lines, if your talking about a normal T1 then 1.544 Mbps is the correct maximum value.

Rob

Well, a T1 is a T1, but you can buy partial T1s (basically the ISP limits your bandwidth) in nearly any size, as long as you ISP has a plan for it. T1 is about the fastest basic copper cabling around, a nice mix between speed and cost. T3's are just 3 T1 lines twisted together, etc. But they aren't fiber optics. When you get into fiber optics, you start talking about gigabits per second.

Also, cable's range anywhere from 128kbps to upwards of 2megabits or more, depending on ISP, local demand, distance from ISP, total cabling from house hub to modem, etc.