Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site sdcrdcf.UUCP Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!genrad!decvax!ittvax!dcdwest!sdcsvax!sdcrdcf!darrelj From: darrelj@sdcrdcf.UUCP (Darrel VanBuer) Newsgroups: net.dcom,net.lan Subject: DEC's broadband Ethernet tranceivers Message-ID: <1634@sdcrdcf.UUCP> Date: Fri, 4-Jan-85 11:13:05 EST Article-I.D.: sdcrdcf.1634 Posted: Fri Jan 4 11:13:05 1985 Date-Received: Mon, 7-Jan-85 02:12:40 EST Reply-To: darrelj@sdcrdcf.UUCP (Darrel VanBuer) Distribution: net Organization: System Development Corp. R+D, Santa Monica Lines: 27 Keywords: Ethernet broadband Xref: watmath net.dcom:766 net.lan:583 Summary: DEC has announced Ethernet tranceivers for use on broadband networks. They implement the standard 10 M bps in 18MHz of bandwidth. There are configurations for either single or double cable broadband. Maximum distance is 3800 meters. Available in the spring. The bad news is that a DECOM tranceiver costs $4250 (and the accessory for single cable broadband another $4500--but I can't tell from the press release whether that's per node or per net). By way of comparison, baseband Ethernet tranceivers cost as little as $200. The announcement also reminded the existence of the DELNI clustering device which allows up to 8 stations to share one tranceiver (a DELNI costs about $2000, so it clearly pays for a group of machines within 50 meters of a common point!). Comments: cost is negligible for supermini or mainframe systems, rather steep for machines in the PC class (it costs about $1000 to put an IBM PC on baseband Ethernet--and that includes the Ethernet controller and outboard tranceiver, $600 to $4000 more for broadband) -- Darrel J. Van Buer, PhD System Development Corp. 2500 Colorado Ave Santa Monica, CA 90406 (213)820-4111 x5449 ...{allegra,burdvax,cbosgd,hplabs,ihnp4,orstcs,sdcsvax,ucla-cs,akgua} !sdcrdcf!darrelj VANBUER@USC-ECL.ARPA