foley@phoebus.meteor.wisc.edu (Jonathan Foley) (06/28/91)
A friend needs this info. Please email me and I'll forward it along: He wants to hook up a NeXT to our building's twisted pair ethernet. The software configuration looks okay, but there no connections are present...what's the deal? Are there some funny hardware requirements for hooking a NeXT to the ethernet? Any information would be most appreciated. Thanks! -- ----------------------------------------------------------------------------- Jonathan Foley | email: foley@meteor.wisc.edu | Center for Climatic Research and ------------------------------- Department of Atmospheric & Oceanic Sciences University of Wisconsin 1225 West Dayton Street (608) 262-0794 Madison, WI 53706 - United States (608) 262-2839 -----------------------------------------------------------------------------
louie@sayshell.umd.edu (Louis A. Mamakos) (06/28/91)
My 68040 NeXT cube is plugged right into our 10Base-T Ethernet network with just a simple twisted-pair jumper between the back of the machine and the wall. It works just fine. Is you're twisted-pair ethernet 10Base-T compatible? If its older Starlan-10 or early synoptics you'll likely have problems as they were not 10Base-T compatible. louie
cnh5730@calvin.tamu.edu (Charles Herrick) (06/28/91)
In article <1991Jun27.231434.8578@ni.umd.edu> louie@sayshell.umd.edu (Louis A. Mamakos) writes:
Is you're twisted-pair ethernet 10Base-T compatible? If its older Starlan-10
or early synoptics you'll likely have problems as they were not 10Base-T
compatible.
Isn't this further complicated by the fact that while 10-Base-T is
twisted-pair compatible, twisted-pair is _NOT_ necessarily 10-Base-T
compliant?
--
"I am walking on the wire
and the wire is what the whole thing is about."
-- John Stewartcoco@cbnewsl.cb.att.com (felix.a.lugo) (06/29/91)
In article <1991Jun27.210746.15069@meteor.wisc.edu> foley@meteor.wisc.edu writes: | He wants to hook up a NeXT to our building's twisted pair ethernet. | The software configuration looks okay, but there no connections | are present...what's the deal? Are there some funny hardware requirements | for hooking a NeXT to the ethernet? Any information would be | most appreciated. | | Thanks! | -- I experienced the same problem when connecting my cube to a Starlan-10 HUB using 10baseT. It turned out to be caused by an incorrect configuration in the HUB itself. Here's some info ... The standard 10baseT includes a "link-integrity" feature which is used to determine if the other side of a connection is active. This is required at both ends of a twisted-pair cable (i.e. in my case, from my NeXT to a port on the Starlan-10 HUB). The NeXT adheres to this standard, and thus requires that the other side of your friend's connection enable "link-integrity". In my case, link- integrity was switch-selectable on a port basis in the Starlan HUB. Have your friend (or building management) check the configuration of the hardware he connects to. If link-integrity cannot be enabled, then I suggest that he obtain a 10base2 (thin ethernet) to 10baseT converter with switch-selectable link-integrity (~ $500.00). He can then connect this box to the NeXT's thin port and DISABLE link-integrity at the converter. Or better yet, have building management replace their outdated hardware. 8^) If link-integrity is enabled, but he still can't get it working, then he probably has a problem with his system (assuming his software configuration is correct as you mentioned)! =============================================================================== Felix A. Lugo E-Mail: (NeXTmail preferred) AT&T Bell Laboratories, Naperville, IL Felix_A_Lugo@ATT.COM coco@ihcoco.att.com AT&T NeXT User Group nug@ihcoco.att.com T.Y.C. Software, Lisle, IL coco@ihtyc.att.com ===============================================================================