Path: utzoo!attcan!uunet!pyrdc!netsys!vector!nobody From: roy@phri (Roy Smith) Newsgroups: comp.dcom.telecom Subject: Re: Metallic circuits Message-ID: Date: 15 Nov 88 17:31:39 GMT Sender: chip@vector.UUCP Lines: 24 Approved: telecom-request@vector.uucp X-Submissions-To: telecom@bu-cs.bu.edu X-Administrivia-To: telecom-request@vector.uucp X-TELECOM-Digest: volume 8, issue 181, message 8 > I've got a metallic (LADS) circuit between my house and my Internet site. > I am presently running at 19.2kb with a pair of Gandalf LDS309a limited > distance modems. What are my chances of ekeing any additional bandwidth > out of this line We have a LADC (is that the same as LADS?) circuit. About a mile total loop length of 26 gauge wire (2 pairs). Using either Black Box V.35-LDM's or Rad ASM-20's we manage to run 56 kbps with no problems (well, no problems after many fights with NY Tel to get the bugs out of the line, which included 2 bad house pairs and a pair with polarity not observed). Actually, I think the LDM's are running at 64 kbps. Rad supposedly has a flavor of the ASM-20 which will run at 128 kbps, as does Black Box. VIR has a modem whch will supposedly do 230 kbps over that line, but we havn't gotten it to work at anything faster than 19.2 kbps. Most of the units I mentioned are V.35 modems, but that's a trivial problem. I'm sure they can be bought with RS-232 interfaces, and if not, RS-232 to V.35 converters are trivial. All the above-mentioned modems are about $600-700 each. -- Roy Smith, System Administrator Public Health Research Institute {allegra,philabs,cmcl2,rutgers}!phri!roy -or- phri!roy@uunet.uu.net "The connector is the network"