What is the different between DSL and T1 Internet connection ?

Question

What is the different between DSL and T1 internet connection ? Other than the speed, that T1 has faster speed than DSL.
What it has to do with the bandwidth? Why there is an explanation that the bandwidth on T1 are guaranteed and not on DSL.

Answer 1

DSL:
DSL or xDSL, is a family of technologies that provide digital data transmission over the wires of a local telephone network. DSL originally stood for Digital Subscriber Loop, although in recent years, many have adopted Digital Subscriber Line as a more marketing-friendly term for the most popular version of DSL, ADSL over UNE.

Typically, the download speed of DSL ranges from 128 kilobits per second (kbit/s) to 24,000 kbit/s depending on DSL technology and service level implemented. Upload speed is lower than download speed for Asymmetric Digital Subscriber Line (ADSL) and equal to download speed for Symmetric Digital Subscriber Line (SDSL).

T1:
Digital signal 1 (DS1, also known as T1, sometimes "DS-1") is a T-carrier signaling scheme devised by Bell Labs.[1] DS1 is a widely used standard in telecommunications in North America and Japan to transmit voice and data between devices. E1 is used in place of T1 outside of North America and Japan. Technically, DS1 is the transmission protocol used over a physical T1 line; however, the terms "DS1" and "T1" are often used interchangeably.

A DS1 circuit is made up of twenty-four 8-bit channels (also known as timeslots and DS0's), each channel being a 64 kbit/s DS0 multiplexed pseudo-circuit. A DS1 is also a full-duplex circuit, meaning, in theory, the circuit can send 1.544 Mbit/s and receive 1.544 Mbit/s concurrently. A total of 1.536 Mbit/s of bandwidth is achieved by sampling each of the twenty-four 8-bit DS0's 8000 times per second. This sampling is referred to as 8-kHz sampling (See Pulse-code modulation). An additional 8 kbit/s is obtained from the placement of a framing bit, for a total of 1.544 Mbit/s, calculated as follows:

(8 bits/channel * 24 channels/frame + 1 framing bit) * 8000 frames/s = 1.544 Mbit/s

Answer 2

IF your business is located two miles or less away from the local phone company's Central Office (usually found in "downtown") you should be able to get DSL service either from the phone company or from a Competitive Local Exchange Carrier (CLEC) IF a DSLAM has been installed in that central office.

SDSL is the same speed in both directions - pricing is based on the bit rate of the connection - anywhere from 128 Kb/sec to perhaps 1.5 Mb/second (the speed of a T1 line). The speed possible is limited by your distance from the CO, the quality of the copper wire pair, and your budget. SDSL is usually less expensive than a comparable T1 circuit.

Answer 3

OK, Broadband is a general term used to refer to a fast Internet connection whether it is DSL (phone companies fast Internet) or Cable (cable companies fast Internet) T1/LAN is usually used to refer to an office Internet connection. a T1 connection as a line that is leased from a telecommunication provider like SprintLink, AT&T or MCI. T1 connections typically operate at only 1.54MB per second whereas cable and DSL operate in the 4 to 8 MB per second range. Hope that helps

Answer 4

DSL and T1 are classifications of the bandwidth (and therefore speed) of a network connection. In general, here is the basic run up of speeds in order from slowest to fastest
56k
DSL
Satellite
Cable
T1, T2, T3, - usually only used for large company networks.

Bandwidth is essentially the amount of data that can pass through network. The greater the bandwidth, the great amount of data can travel through and therefore the speed is greater.

Hope this helps!

Answer 5

I believe that DSL speed varies depending on how many people are actually logged on to the network. There are these things called Nodes that runs anywhere from 50-200 or so peoples connections. If all 200 are logged on to the internet, then your speed will be slower, if only a few are logged on then it will be faster. T1 must be a dedicated stream so no matter how many user are online within the node, it will not affect your speed.

I hope this makes sense.