Path: utzoo!attcan!uunet!husc6!ukma!rutgers!elbereth.rutgers.edu!zydeco.rutgers.edu!latzko From: latzko@zydeco.rutgers.edu (Alexander Latzko) Newsgroups: comp.periphs Subject: Re: 2400 baud modems Message-ID: Date: 12 Dec 88 21:18:57 GMT References: <2623@m2-net.UUCP> Distribution: na Organization: Rutgers Univ., New Brunswick, N.J. Lines: 39 In article <2623@m2-net.UUCP> mju@m-net.UUCP (Marc Unangst) writes: > Also: Right now in the 9600-baud modem market, there are 4 "standards" - > The Ven-Tel Pathfinder 18K, the US Robotics 9600 Courier HST, the > Telebit Trailblazer (popular with Unix sites), and the Hayes V-Series > 9600. Is there any sort of evolving standard? Actually, there are two real 9600 bps ( not baud ) standards and two popular alternates. The two real standards are V.29 which is 9600 bps synchronous and requires a leased line for full duplex and V.32 which is the real dialup/asynch/9600 standard. The two alternates are PEP and V.29/asymetrical. PEP is what the Telebit and Ven-Tel (Ven-Tel licenses it from Telebit) and it is really spiffy using multiple frequency bands to get through. A variation on PEP will probably become V.34 when it finally hits. The HST uses a slow reverse channel along with a 9600 bps forward channel. I am not 100% sure but I believe the HST uses a variant of V.29 for its fast channel. It then turns around the channels when need changes. Really not a bad set up. The Telebit has been embraced by Usenet and UNIX sites and the HST seems to be the choice of MS-DOS/AMIGA/ST/MAC bboard operators. The Hayes V-Series are somewhat bogus using V.32 in a half duplex scheme. Hayes has a real V.32 modem in the works but I haven't been able to get a price for it yet. It is supposed to be in the $1,595 range and only do V.32 which means it will be on the very high end of the price range. Look at the UDS V.32 for just V.32 and the Penril Alliance V.32 for 300/1200/2400(w/MNP)/V.32. The last time I looked the UDS was $1,195 and the Penril was $1595 list. > "Don't find a fault, | Marc Unangst > find a remedy." | UUCP: mju@m-net.ann-arbor.mi.us > -Henry Ford | UUCP path: ...!uunet!mailrus!clip!m-net!mju > ---------------------+ Internet: mju%m-net%clip@umix.cc.umich.edu /S* latzko@rutgers.edu {backbone}!rutgers!latzko