Path: utzoo!utgpu!watmath!clyde!att!mtuxo!qeds
From: qeds@mtuxo.att.com (01226-E.SCHULZ)
Newsgroups: comp.dcom.modems
Subject: Re: ARK LDM-4
Summary: AT&T DSUs work fine on LADC
Message-ID: <3633@mtuxo.att.com>
Date: 8 Dec 88 00:23:32 GMT
References: <8811301805050FA.GUWI@RAI.CC.FSU.EDU> <8157@megaron.arizona.edu> <11@dsinc.UUCP>
Organization: AT&T, Middletown NJ
Lines: 21


If you have a non-loaded metallic 4-wire Local Area Data Channel
(LADC), why use a modem?  Send your data digitally end-to-end.
Our group developed the AT&T 2500/2600 Data Service Units for
DDS, and these things can be used on LADC channels.  Mean time
between DSU failures is around 17 years.  This is the maximum
cable length (in miles) for various speeds and wire gauges:

                              Wire Gauge (AWG)
               DSU Speed    19    22    24    26
               __________________________________
                9.6 Kbps   15.2   9.7   7.3   5.6
               19.2 Kbps   10.7   6.6   5.0   3.9
               56 Kbps      9.2   5.4   3.8   2.8
               64 Kbps      9.2   5.4   3.8   2.8

Call me for more technical info.  1-800-247-1212 should get you to
a sales rep.
-- 
Ed Schulz, AT&T, Middletown, NJ
(201)957-3899 mtdcb!eds