broadbrand-adsl modem/lease line what's the difference 1

[Guest_imported]

We are using adsl modem (6M) to access the internet.
We have heard of lease line (256k) can be used but
at a very costly price. What is the major difference
between the two (other than price) Tks for any
comment.

 

[rtaylor]

one is dedicated just to you and the other is shared with everyone in your area. The leased line will be faster. If this is a business, check out a full T1...they are very cheap now when you get them through the major players like SPrint, MCI, ATT...big price war out there. I have 4 T-1's in each of my offices and am paying around $1800 a month for all of them...including loop back.

 

[Guest_imported]

Just curious. The ad said that the adsl is dedicated and
not share. Strange enough. If it is as ad. it would be
faster than the lease line, wouldn't it be? I have heard of
the lease line some 15 years ago but the internet would
just in the last 10 years (or should I say popular). Are
they using different tech. or similar stuff.

 

[MattWray]

Check out these 2 links. A leased line is normally a high speed link between 2 sites. Office A has a leased line connection to office b. DSL is just a connection to the internet, and it is usually slower than T-1.

http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212470,00.html

http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci213915,00.html

Matt Wray
CCNA, MCP
mwray77518@yahoo.com

 

[Guest_imported]

Thanks mattwray,

It reminds me of what lease lines are. What a jerk to
have forgotten our college stuff. Very inspirational
on ADSL. This forum is such a nice place and guys
are so willing to help (and of course capable to do so)

 

[Speccie]

Hi, This is two different protocols. ADSL, Internet etc use packet switching. This has an overhead. Packets contain addressing so they know where they are going and coming from, also they use start/stop bits on each byte, usually just the stop bit.
Point to point (leased lines) have no need of this as they know what is at the other end so the usual protocol is bi-synchronous transmission. This needs no addressing just a few control characters at the beginning to synchronise both ends in the data stream. It has no start/stop bits but sends a CRC character at the end of each block to check for data validity. Very similar to disk drive operation, it has limited capability to correct the datastream on the fly.
i.e. Packet switching data is at least 9 bits to the byte.
Bi-sync is 8 bits to the byte. (or less if 7 bit data is being used). Obviously both systems speed is dependant on the modem speed & line speed.

regards Michael