Mugwump <(E-Mail Removed)> wrote:
> In article <AGLvb.11726$(E-Mail Removed)>, Ian Stirling
> said......
>
>> Do any modems/telecoms equipment support compression over ADSL?
>> Idly wondering after sometimes getting slightly faster downloads
>> than 512K with ISDN during news header downloads.
>>
> ADSL doesn't support compression AFAIK
ADSL doesn't support anything.
ADSL is just the link layer that lets you transfer raw data
between you and the exchange over the copper wires.
Over this is run (in the UK) a virtual pipe from this bit of hardware to
one that implements PPP.
Over the PPP link are transferred TCP/IP packets that implement the
internet as we know it.
The PPP link is more or less seperate from the under(and over)lying layers,
and there is no good reason why it can't support anything that a normal
PPP link using a modem can.
VJ compression (reduces packet header sizes), assorted compression
schemes, ...
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