From owner-freebsd-questions Wed May 26 3:35:56 1999 Delivered-To: freebsd-questions@freebsd.org Received: from probity.mcc.ac.uk (probity.mcc.ac.uk [130.88.200.94]) by hub.freebsd.org (Postfix) with ESMTP id E7D7214DDE for ; Wed, 26 May 1999 03:35:50 -0700 (PDT) (envelope-from ip@albatross.mcc.ac.uk) Received: from albatross.mcc.ac.uk ([130.88.202.16]) by probity.mcc.ac.uk with esmtp (Exim 1.92 #3) id 10mb2K-000BPj-00; Wed, 26 May 1999 11:35:48 +0100 Received: (from ip@localhost) by albatross.mcc.ac.uk (8.9.3/8.9.1) id LAA36678; Wed, 26 May 1999 11:35:47 +0100 (BST) (envelope-from ip) From: Ian Pallfreeman Message-Id: <199905261035.LAA36678@albatross.mcc.ac.uk> Subject: Re: console terminal server and power loss In-Reply-To: <199905251634.MAA07355@lakes.dignus.com> from Thomas David Rivers at "May 25, 1999 12:34:57 pm" To: rivers@dignus.com (Thomas David Rivers) Date: Wed, 26 May 1999 11:35:47 +0100 (BST) Cc: rivers@dignus.com, terry@program-products.co.uk, freebsd-questions@freebsd.org Reply-To: ip@mcc.ac.uk X-Mailer: ELM [version 2.4ME+ PL43 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > I think the difference must be on the Sun side Sorry for dropping in so late, but I had to get this back from the guy who makes up my cables. As an ex-Sun admin I've a (slowly decreasing) pile of Sun boxes which are attached to a mixture of dumb terminals and both Sun and FreeBSD console servers. I got this trick somewhere off the net back in the late 80's. It's mainly to avoid a Sun dropping into the prom when a terminal dies or is unplugged, but seems to work just as well for hanging a Sun on a console server. Sun Box Console Server 2 Tx ------------------------- ------------------------- 2 Tx \/ /\ 3 Rx ------+------------------ ------------------------- 3 Rx | Z 4.7K resistor | 25 -5v ------+ 25 -5v 7 GND ---------------------------------------------------- 7 GND 4 RTS --+ 4 RTS | 5 CTS --+ 5 CTS 6 DSR --+ 6 DSR | 20 DTR --+ 20 DTR YMMV & FWIW, Ian. -- Network Unit, SNOT Team, Manchester Computing, The University, Manchester, UK. mail: ip@mcc.ac.uk | phone: +44-161-275-6006 | fax: +44-161-275-6040 Where once we had dragons to slay, now we just sacrifice chickens. 39,000 users, 622Mb/s networking, and a 486. :-( To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message