Path: utzoo!utgpu!watmath!clyde!att!rutgers!mailrus!ames!ncar!noao!arizona!joel From: joel@arizona.edu (Joel Snyder) Newsgroups: comp.dcom.modems Subject: Re: ARK LDM-4 Message-ID: <8157@megaron.arizona.edu> Date: 2 Dec 88 17:30:12 GMT References: <8811301805050FA.GUWI@RAI.CC.FSU.EDU> Reply-To: jms@mis.arizona.edu (Joel Snyder) Organization: U of Arizona MIS Dept, Tucson Lines: 32 In article <8811301805050FA.GUWI@RAI.CC.FSU.EDU> James@FSU.BITNET (James Messer) writes: asks about the ARK LDM-4. This is not designed to work with the PSTN; the LDM-4 requires a dedicated copper-only (LATA) 4-wire circuit between the two points you want to connect. This is slightly different from a V.29-type modem, which requires an LADA type of circuit. I'm not sure about the phone company in whatever city you're writing from, but you probably can get a LATA circuit between your home and office for only a few dollars a month, assuming that you live a mile away or less. For some reason, the LATAs seem to have been glossed over in the pricing war to make data users pay through the nose---in Tucson, I can get an LATA in the same CO for $20/month. I don't have the latest information on ARK modems here, but there's a fifty-fifty chance the modem you have is synchronous only as well, which means you'll need to make sure that your home and office equipment are matched to talk synchronous (hint: most aren't). On the bright side, we use ARK short-hauls (LDM stands for "Limited Distance Modem") at 14.4 over local loops all the time, and they work great! Every six months, you have to tweak the pots in the front to bring it back into coordination with the one on the other end, but it's sturdy gear. Joel Snyder PS: I know that an LADA circuit is a 3004, or 2 of the 3002. But is there a common nomenclature for LATA circuits? It usually takes 3 to 4 people before I can find one who knows what I'm talking about. jms