Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!zaphod.mps.ohio-state.edu!ncar!midway!linac!att!cbnews!cbnewsl!coco
From: coco@cbnewsl.cb.att.com (felix.a.lugo)
Newsgroups: comp.sys.next
Subject: Re: hooking up a NeXT with 10baseT connector
Message-ID: <1991Jun28.174345.26638@cbnewsl.cb.att.com>
Date: 28 Jun 91 17:43:45 GMT
References: <1991Jun27.210746.15069@meteor.wisc.edu>
Organization: AT&T Bell Laboratories
Lines: 44

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	better yet, have building management replace their outdated hardware.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
===============================================================================