question about phone lines

[Xpressah]

if im on 56k(which i am) and have it on a adsl phone line(which i think are different to normal phone lines?) should i be connecting at higher speeds than a normal phone line?

i would've thought so, but im sure the line at my new house is an adsl one, and i was connecting at higher speeds on the older normal phone line at the old house....

EDIT: grammer

[Valium]

there is no physical difference between an adsl enabled line and a normal phone line.

You will not connect any faster than normal, well unless you use an adsl modem...

[Grrr!!]

Not at all.

DSL and 56k are totally different technologies. They do not connect in the same way, and therefore cannot be seen as the same.

It's a bit like driving a car over the tracks of a bullet train, and expecting the car to go faster then it would on the road.

[Spoon]

Well if you got a bullet train up the ass (or nose for that matter) you would be moving pretty quick

[Xpressah]

Originally posted by Grrr!!
It's a bit like driving a car over the tracks of a bullet train, and expecting the car to go faster then it would on the road.

so what your saying is it would be better to run 56k on normal lines, but it shouldnt affect it?

still makes me wonder why im getting crap connect speeds and random d/c's then...the lines are newer and therefore should be in better condition, and no i havent complained yet ;)

EDIT: cheers for the help aswell

[Grrr!!]

Lines being newer does not necessarily make them better. The dumb arse electrician that put our phone lines through our house was kind enough to short two wires together ... result = no connections above 28k.

[Oblivian]

You can get worse rates on a modem if your line has been jumpered for someone else in the house to use DSL.

The higher frequencies that are used for the DSL signal split by the filter loweres the upper end on voice, causing your modem to not be able to reach full signal pitch/speeds.

I went from being able to connect at around 54kpbs solid to 52 or below when in the change over period to DSL (IE when it was installed but no DSL router)

[Bung]

Don't forget that the connect speed displayed on mouse-over the Win modem symbol is the initial rate which can be pretty meaningless because it doesn't update. A check of the modem log can show that the speed just before disconnect is much slower.

[Oblivian]

By 'initial' rate I'll assume you mean DTS rater than CTS. This can be changed to reflect CTS easily.

But yes, of couse linespeed is varied dependant on noise and how much the error correcting changes carrier speed.

Thats kinda independant to his 1st query with if a jumpered line or one that has the ability to have DSL set at the exchange makes a diff.

[whetu]

dsl enabled lines can usually be of better quality because telecom guarantees at least 2meg connectivity (digital). On POTS you are guaranteed 9.6k(analogue)... so if your line is capable of 2meg, they more than likely leave it alone, if it isnt capable of 2meg they give it a small overhaul.

It doesnt take much to overhaul a line, myself and my father got the line at my parents place from 5meg capability up to 7.6meg..

The difference in connection speed on dial up over a dsl line could also be considered to be due to the fact that you've got a new card in the exchange for your line

[Bung]

Originally posted by Oblivian
By 'initial' rate I'll assume you mean DTS rater than CTS. This can be changed to reflect CTS easily.

No, I meant that Windows displays the Data rate contained in the Connect message from the Modem and this doesn't change even if the rate drops during the session.

[/QUOTE][/B]But yes, of couse linespeed is varied dependant on noise and how much the error correcting changes carrier speed.[/B][/QUOTE]

Small changes to a line can affect whether you connect at 50-54K.
In most cases the initial connect at greater than 50K is optimistic and the rate drops back to 48-49K. Querying the modem with ATI6 (for USR modems) or the Connexant equiv will show thge rate at disconnection.

[/QUOTE][/B]Thats kinda independant to his 1st query with if a jumpered line or one that has the ability to have DSL set at the exchange makes a diff. [/B][/QUOTE]

Most improvements involve line balance, changing from 3 wired to 2 wired jacks. This is a good idea for any line.

Then the addition of DSL to the line is more likely to degrade the 56K modem and voice performance than improve anything as the filters and DSL modems will alter the line impedance and there may be some noise increase.

[astro-g]

the higher impedence will decrease noise levels,
of course, it will also make it harder for the modem to send so strong a signal......

[Bung]

Originally posted by astro-g
the higher impedence will decrease noise levels,
of course, it will also make it harder for the modem to send so strong a signal......

No, in this case the 2 things aren't related. Even with a splitter or filters the ADSL signal will be unwanted noise as far as the V90 modem is concerned.

On a voice call things like echo on long distance calls are affected by impedance matching that the filters alter. Neither the telephones or the ordinary phone circuit were designed with ADSL in mind, it's all a compromise.

[dumass]

On the back of ADSL filter packets it says that you will get slightly slower 56k dialup connections.