Difference between ADSL line and T1 line?

June 23, 2010 at 04:10:35
Specs: Windows 2003
Hello all,

My company is using ADSL connection of 3 Mbps but our Network Engineer want to move to 1.5Mbps T1 line.

what is the defference to move from 4 Mbps ADSL line to 1.5 T1 line........and it is more expensive.

please tell me that difference clearly?


See More: Difference between ADSL line and T1 line?

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June 23, 2010 at 06:30:04
T1 is an optical cable, or occasionally a big copper cable,
directly into your office from a main server. The main pros are
reliability and available bandwidth - it can handle far more data
and voice calls than an ADSL line and speeds are the same in
both directions (probably the main reason your network guy
wants it). The downside is, as you say, the cost...

"I've always been mad, I know I've been mad, like the most of us..."

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June 23, 2010 at 08:07:34
There are two types of T1, dedicated/point to point/leased line [number of terms to describe the same thing] and frame relay.

A PTP T1 is a line from site to site
Frame Relay T1 is a shared line with a CIR [committed information rate] which is usually half of port speed.

T1's do not go to servers but to the CO [central office] of the phone company [who owns the lines] or to the co-location [isp leases resell lines] at the CO.


If you are using the present ADSL for internet access it will be a bandwidth LOSS to go to a T1. That is 4mbps of bandwidth compared to 1.5mbps bandwidth.

We use PTP T1's between our sites so we can channelize them and run voice as well as data over dedicated channels on our T1s would be one example of how you can use a PTP T1 vs ADSL.

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July 9, 2010 at 01:52:21
Thanks for your reply! You people gave me very good examples and explanation!

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