There's this little company in Massachusetts named Codex which makes
a product which will do what you want. It is called the 2680 trellis
coded 19200 bps modem. It's about $30,000 for a pair.
Still think DDS is expensive?
The VT220 keyboard is an <iS<o standard. That means the French can
hate it as well as the Americans.
> In article <2...@halleys.UUCP> dy...@halleys.UUCP (Steve Dyer) writes:
> >I am looking for modems which can support rates higher than 9600 baud
> >over 4-wire full-duplex D1-conditioned analog leased lines, aka 3002
> There's this little company in Massachusetts named Codex which makes
Not so little..... they are part of Motorola
(408) 746 7539
(Disclaimer: even I don't necessarily agree!)
Right now, I'm finding that 56kb digital service, at least between the points
that I'd be interested in, is more than 7X as expensive as analog 9.6kb lines,
and the necessity to keep recurring costs low is a major factor in the design.
While I'll agree that $30K is a bit steep, I've already received pointers to
other modems in the 14.4/16/19.2kb range for a lot less, which information I'll
summarize once I sift through it all.
I was being sarcastic, obviously a mistake on my part.
Also, if you're willing to wait a while, you might be able to use
ISDN. That will give you 2 64K switchable circuits over 4 wires.
In the US I think you have to be on a 5ESS, but I hear our local
5E is scheduled to have ISDN available in 1987 sometime.