What you say is usually correct, but not always. Dial-up DSL is
available (at a lower price), at least in some parts of the US.
Fact is that "dial-up DSL" is not DSL at all -- it couldn't be further
from DSL if it tried. This term is used to describe a dial-up service
which utilizes a compression/caching/graphics-downgrading kludge to make
the dial-up service seem faster. DSL depends on having a low-RF carrier
superimposed upon existing copper POTS circuits and cannot be dialed into.
Here is an excerpt from one provider's (White Mountains) website which
lets the cat out of the bag:
How does it work?
With traditional dial-up methods, the text and graphics that make up web
pages get sent from the server to you over your phone line. Because of
the large amount of data required to be sent, this process can be
painfully slow. Dial-Up DSL compresses this data using a proprietary
technology, and sends it over your existing dial-up phone line. This
compression process allows a smaller amount data to be sent – up to five
times less – making the download time of your web pages and your online
experience that much faster. As an added download time reducer, Dial-Up
DSL stores elements of the web sites you visit frequently eliminating
the need to re-download them every time you visit these sites.
John McGaw
http://johnmcgaw.com