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Posted by Ron Hunter on September 29, 2005, 4:17 am
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James Knott wrote:
> Hymer wrote:
>
>> Hello,
>>
>> I am looking at speeds for cable, dsl, and T1. I think I have it right
>> based on my reading. But I was not sure if I might be making a mistake
>> about the unit of measure.
>>
>> Does this seem right?
>>
>> Cable: 4.0 Mbsp down, 384 Kbps up
>> DSL: 1.5 Mbps down, 384 Kbps up
>> T1: 1.1 Mbps down, 1.1 Mbps up
>>
>> If these speeds are correct, the fastest would be cable. I was surprised
>> that T1 was not faster.
>>
>> Does this seem right or are my units of measure wrong?
>
> A DS1 (T1) runs at 1.544 Mb/s. ADSL and cable modems can run at a variety
> of speeds, some faster and some slower than a DS1. In my own case, my
> modem runs at 5 Mb/s down and 800 Kb/s up, so it's more than 3x faster than
> a DS1 for downloads, and 1/2 DS1 speed for uploads.
>
And a HECK of a lot cheaper!
--
Ron Hunter rphunter@charter.net
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Posted by James Knott on September 29, 2005, 7:59 am
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Ron Hunter wrote:
>> A DS1 (T1) runs at 1.544 Mb/s. ADSL and cable modems can run at a
>> variety
>> of speeds, some faster and some slower than a DS1. In my own case, my
>> modem runs at 5 Mb/s down and 800 Kb/s up, so it's more than 3x faster
>> than a DS1 for downloads, and 1/2 DS1 speed for uploads.
>>
>
> And a HECK of a lot cheaper!
There is a symmetrical service similar to ADSL, called HDSL, which can also
be configured for the DS1 rate of 1.544 Mb/s. It's cheaper than a standard
DS1, but probably more expensive than ADSL.
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Posted by Reed on September 28, 2005, 1:15 am
If you were Registered and logged in, you could reply and use other advanced thread options
Hymer wrote:
>
> Hello,
>
> I am looking at speeds for cable, dsl, and T1. I think I have it right based
> on my reading. But I was not sure if I might be making a mistake about the
> unit of measure.
>
> Does this seem right?
>
> Cable: 4.0 Mbsp down, 384 Kbps up
> DSL: 1.5 Mbps down, 384 Kbps up
> T1: 1.1 Mbps down, 1.1 Mbps up
>
> If these speeds are correct, the fastest would be cable. I was surprised
> that T1 was not faster.
>
> Does this seem right or are my units of measure wrong?
>
> Thanks,
>
> Bob
A little clarification on T-1 (aka DS-1).
T-1/DS-1 was invented approx. 40 years ago as a method of
transporting 24 analog voice conversations on a 4 wire circuit.
Its raw speed is 1.544 Mbps, bidirectional. Usable speed is 1.536
Mbps as 8Kbps is used for syncronization. (24 x 64Kbps ea =
1.536Mbps) Data capabilities, either Full or Fractional T-1, were
added later.
Typically used by businesses that can afford the cost, and need
the "guaranteed" uptime, and 7x24 repair, that you don't get with
DSL or cable.
--reed
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Posted by Robert L. Haar on September 28, 2005, 6:55 pm
If you were Registered and logged in, you could reply and use other advanced thread options
> Hello,
>
> I am looking at speeds for cable, dsl, and T1. I think I have it right based
> on my reading. But I was not sure if I might be making a mistake about the
> unit of measure.
>
> Does this seem right?
>
> Cable: 4.0 Mbsp down, 384 Kbps up
> DSL: 1.5 Mbps down, 384 Kbps up
> T1: 1.1 Mbps down, 1.1 Mbps up
>
> If these speeds are correct, the fastest would be cable. I was surprised
> that T1 was not faster.
>
> Does this seem right or are my units of measure wrong?
Those numbers are reasonable, but can vary. I get 6 Mbps down on Comcast
cable. DSL can vary depending on the quality and length of the copper line
connecting you to the telephone switch gear. Your mileage may vary.
A T1 has two big advantages - the bandwidth is usually guaranteed while
Cable and DSL guarantee almost nothing.
Second, the bandwidth is symmetric meaning that you get the same for
uploading or running a server. If your usage is web browsing and file
downloads, then this does not do much for you.
Another thing you should check on is the customer service of the companies.
Ask some people who live in the area what their experiences have been.
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Posted by James Knott on September 28, 2005, 9:11 pm
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Robert L. Haar wrote:
> A T1 has two big advantages - the bandwidth is usually guaranteed while
> Cable and DSL guarantee almost nothing.
Actually, DS1 (T1) bandwidth is guaranteed only for the path to the ISP.
Once there, you get into shared systems again. The same thing happens with
ADSL as well. While you may have full bandwidth to the DSLAM, from that
point on, you're on shared resources, with considerably less bandwidth than
the aggregate total of all the ADSL lines.
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