🚀 go-pugleaf

On Wed, 08 Dec 1999 08:51:01 +0000, Paul Black <paul.black@oxsemi.com>
wrote:

>I've been looking at getting another ISDN card/TA as I seem to have trouble
>with my Speedway card (not sure if it's card problems or driver problems
>or something else). I was looking at the Hayes Accura ISDN TA web page and
>have a couple of queries:

Yes.

> - Would external TAs using AT commands just be treated as a modem (i.e. use
>   pppd) and require no special kernel support?

Yes.

> - What about compression? Demon provide STAC and MS-STAC but the web page
>   mentions "V.42bis Data Compression over ISDN using V.120 & X.75", are
>   they different terms for a similar thing or does it mean STAC/MS-STAC is
>   not supported?
>

No, I am sorry, V.42 bis data compression is for modems. Do you
actually know what a modem means? ISDN is completely digital and does
not need a modem unless you want to connect to the old fashioned world
of 2nd generation telecommunications.

Stac is used for ISDN digital networks It is now the de-facto
standard. What you refer to as MS-Stac is someone who thinks he has a
proprietary right to the web and now thinks he is so omni-potent that
he can add his companies initials to the standard.

As to the real question V.120 and  X 75 are not used in  > 99 % 
of any connections.

Hardly, anyone makes connections at V.120 or X75 to IP's as these are
old analogue related formats.

Put it another way ppp sync is how 99% of ISDN dumb or active cards
make their connections to their respective information providers
(IP's).  (Sorry, net police man I now put the full stop outside the 
quotation marks the US way. ( Please discuss)....





Barry Schofield

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