dya@unc-c.UUCP (03/24/84)
<9 Wives presents....Norris>
In response to Mike Samuels request, here are some (
admittedly biased ) reviews on ultra-high speed modems...
The ULTIMATE dial up modem is the Universal Data Sys-
tems 9600 A/B ( which also works over 2 and 4 wire leased
circuits, but for 4 wire leased, use the 9600 Plain -- it's
probably cheaper ). This half-duplex insturment costs about
what the 2400 full duplex did about two years ago ( $ 2200 )
.
Unless you have AGC amplifiers which munch on the ini-
tal training burst, these modems connect and work every sin-
gle time. They have been successfully used over the entire
U.S. ( with the exception of a certain finicky area near
Buffalo, N.Y. -- see last article )and are more trouble-free
than my trusty Penril 212. UDS has a unique adaptive
equaliser which readjusts itself on the incoming data 9600
times per second. In addition, their product support is EX-
EMPLARY.
You may have seen a Prentice 9600 dial up modem
featured in Mini-Micro Systems ( or Electronic Design ? )
this month. It is, in fact, a UDS 9600 A/B with a new front
panel decal. They want $ 2995, UDS seems to want consider-
ably less.
OH yes, there is supposedly another 9600 bps dial-
through, they want $ 7,200 bucks for it, and all it does
more is that it is allegedly "intellegent" a la Hayes.
9600 A/B will fall back to either 7200 or 4800 by com-
mand from the host computer, ( of course, from 7200 to 4800
) and is settable to any of these rates.
The second modem which is high speed is the General Da-
taComm 208 A/B, which is 4800 bps only. They work, but their
product support is not nearly what UDS's is.
If you use async/sync converter, UDS's doesn't support
7200 bps. They do have one which uses ECC in addition, it
is highly recommended for the 9600 A/B by its manufacturer,
and not a bad deal for $ 600.
Views, etc. to ( akgua, decvax!mcnc!urp!dya )
David "Last of the Analog....."