In message <ftsokn$scd$1@energise.enta.net>, Gordon Henderson
<gordon+usenet@drogon.net> writes
>They went by various names - eg. Livingston Portmonster, or "not
>modems" .... They plumbed into the PSTN via E1 / ISDN30 lines and took
>the data digitally with no intervening analogue conversion stage, other
>than the modem at the customers end. (hence the term "not modem")
Sort of a Mod without the EM
>They
>did clever DSP type work internally to recreate the original digital
>data out of the digitally encoded analogue data, ran the other end of
>the (usually) PPP link, then presented it as an IP connection out on an
>Ethernet line.
>
>Gordon

--
Clint Sharp