8 Mbps ADSL format

[rookie1010]

hello

My ISP virgin.net recently upgraded my ADSL link from 2 Mbps to 8 Mbps (sometimes it connects at 4 Mbps, sometimes at 5 Mbps, sometimes at 6 Mbps)

i have looked around and have seen this d-link adsl modem/router
DSL-G604T > Wireless G ADSL Router Modem

it says it can handle
DMT full rate downstream (up to 8Mbps)
DMT full rate upstream (up to 640Kbps)

there is only one flavour of 8Mbps ADSL correct, that is DMT, correct?

 

[imported_Ned Flanders]

Speeds will always depend of the distance from your ADSL exchange.

 

[rookie1010]

thanks for the reply

so depending on the distance from the exchange, the modulation technique will be changed and hence the speed (data rate) will be varied, correct?

is there a single ADSL standard, which guarantees all ADSL equipment to interwork with each other?

 

[Mark R]

There is one standard for ADSL (which is what BT use, and is what they supply to most broadband resellers like Demon, pipex, Tiscali, etc.).

There is also ADSL2 and ADSL2+ which are used by companies that take over the line (under the local loop unbundling agreement) e.g. Bulldog and Be Internet, respectively supply ADSL2 and ADSL2+ services.

I don't know how virgin.net works - but if you keep your phone service from BT then you will be getting your broadband from BT (which is ADSL). If, as part of signing up for broadband, your phone service gets taken over by the same company then you have an LLU provider and they supply their own ADSL equipment (so you could get ADSL, ADSL2 or ADSL2+).

If in doubt, get a router that support ADSL2+ because then it will work with all types of line. Additionally, the higher performance electronics needed to make ADSL2 work, may also improve performance on a normal ADSL line.

 

[rookie1010]

thanks for the reply

i get my phone service from BT, but broadband is supplied by virgin.net, so i guess my ADSL is plain ADSL. you mean

the higher performance electronics needed to make ADSL2+ work