Path: utzoo!attcan!uunet!pyrdc!netsys!ames!amdcad!rpw3 From: rpw3@amdcad.AMD.COM (Rob Warnock) Newsgroups: comp.dcom.lans Subject: Re: Any DELNI equivalents? Message-ID: <23009@amdcad.AMD.COM> Date: 23 Sep 88 08:53:01 GMT References: <3340@cs.utexas.edu> <76@billp.pacbell.COM> <902@shark.lamont.Columbia.edu> Reply-To: rpw3@amdcad.UUCP (Rob Warnock) Organization: [Consultant] San Mateo, CA Lines: 28 In article <902@shark.lamont.Columbia.edu> dale@lamont.Columbia.edu (dale chayes) writes: +--------------- | In response to the discussion about "DELNI" equivalents: | We have (at least) four Cabletron MT-800s multi-port transceivers around the | lab (and on our ship.) In general, I like them, but I have some reservations. | LEDS: ...I have grown to distrust the red "CP" led that the manual says is | collisions. We just don't seem to see them in proportion to the activity of | this led... +--------------- The "CP" LED is probably simply reporting activity on the "collision detect" line of the interface. If you have an 802.3 or Ethernet-2 transceiver on the coax, the transceiver will briefly pulse "CP" after every transmission (the so-called "heartbeat"). (EThernet-1 transceivers do not do this.) Don't worry about it. (...except, all your controllers should probably be configured for "heartbeat" -- a.k.a. "SQE" -- or they may get confused. I doubt it is safe to mix 802.3/Ether2 and Ether1 stations on the same multiport.) Rob Warnock Systems Architecture Consultant UUCP: {amdcad,fortune,sun}!redwood!rpw3 ATTmail: !rpw3 DDD: (415)572-2607 USPS: 627 26th Ave, San Mateo, CA 94403