From owner-freebsd-isdn Tue Oct 17 23:47:43 2000 Delivered-To: freebsd-isdn@freebsd.org Received: from hcshh.hcs.de (hcshh.hcs.de [194.123.40.1]) by hub.freebsd.org (Postfix) with ESMTP id CA40E37B4E5 for ; Tue, 17 Oct 2000 23:47:41 -0700 (PDT) Received: from hcswork.hcs.de (hcswork.hcs.de [192.76.124.5]) by hcshh.hcs.de (Postfix) with ESMTP id 0C1055D2C; Wed, 18 Oct 2000 08:47:27 +0200 (CEST) Received: by hcswork.hcs.de (Postfix, from userid 200) id A7EFD3E8; Wed, 18 Oct 2000 08:47:26 +0200 (METDST) Subject: Re: ISDN S0 bus wiring configurations In-Reply-To: from Andrew Gordon at "Oct 18, 0 01:33:31 am" To: arg@arg1.demon.co.uk (Andrew Gordon) Date: Wed, 18 Oct 2000 08:47:26 +0200 (METDST) Cc: hm@hcs.de, freebsd-isdn@freebsd.org Reply-To: hm@hcs.de Organization: HCS Hanseatischer Computerservice GmbH X-Mailer: ELM [version 2.4ME+ PL39 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 868 Message-Id: <20001018064726.A7EFD3E8@hcswork.hcs.de> From: hm@hcs.de (Hellmuth Michaelis) Sender: owner-freebsd-isdn@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org From the keyboard of Andrew Gordon: > > > > I have put up a text about ISDN S0 bus wiring configurations at > > > > http://www.freebsd-support.de/i4b/isdn-cabling.txt > > > > Corrections and additions welcome! > > It seems odd that you mention only 75R and 150R cable impedance, when most > people probably use 100R cable (and termination is specified as 100R). This is how it can be read in I.430. As far as i understand it, every type of cable has to be terminated with 100 Ohms but the maximum length varies with the cable impedance. hellmuth -- Hellmuth Michaelis Tel +49 40 55 97 47-70 HCS Hanseatischer Computerservice GmbH Fax +49 40 55 97 47-77 Oldesloer Strasse 97-99 Mail hm [at] hcs.de D-22457 Hamburg WWW http://www.hcs.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message