Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!amdahl!sjl From: sjl@amdahl.amdahl.com (Steve Langdon) Newsgroups: comp.dcom.modems Subject: Twisted Pair Ethernet Message-ID: <18015@amdahl.amdahl.com> Date: Tue, 10-Nov-87 02:58:32 EST Article-I.D.: amdahl.18015 Posted: Tue Nov 10 02:58:32 1987 Date-Received: Thu, 12-Nov-87 05:29:09 EST References: <16064@topaz.rutgers.edu> Reply-To: sjl@amdahl.amdahl.com (Steve Langdon) Organization: Amdahl Corp, Advanced Systems Planning Lines: 16 Keywords: Ethernet LAN FCC Summary: It works without violating FCC regulations In article <16064@topaz.rutgers.edu> ron@topaz.rutgers.edu (Ron Natalie) writes: >Foo. Note that twisted pair Ethernet is a kludge. This high-speed >(Radio Frequency) unshielded twisted pair stuff is going to be put >to an end as this stuff is not going to comply with FCC regulations >on emissions. Ron is usually sensible but this time he shot from the hip and missed. Careful attention to impedance matching makes it possible to avoid the RF emission you would expect. The stunt boxes that real twisted pair Ethernet products use are there to do dynamic impedance matching. -- Steve Langdon sjl@amdahl.amdahl.com +1 408 746 6970 ...!{decwrl,sun,seismo,ihnp4,cbosgd}!amdahl!sjl [I speak for myself not others.]