From owner-freebsd-multimedia Mon Feb 10 00:06:14 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.5/8.8.5) id AAA17265 for multimedia-outgoing; Mon, 10 Feb 1997 00:06:14 -0800 (PST) Received: from hcshh.hcs.de (hcshh.hcs.de [194.49.17.1]) by freefall.freebsd.org (8.8.5/8.8.5) with SMTP id AAA17260; Mon, 10 Feb 1997 00:06:08 -0800 (PST) Received: from hcswork.hcs.de by hcshh.hcs.de with smtp (Smail3.1.28.1 #9) id m0vtqkF-000TKNC; Mon, 10 Feb 97 09:05 MET Received: by hcswork.hcs.de (Smail3.1.29.0 #12) id m0vtqkA-0000EWC; Mon, 10 Feb 97 09:05 MET Message-Id: From: hm@hcs.de (Hellmuth Michaelis) Subject: Re: Re(2): isdn cards To: smp@csn.net (Steve Passe) Date: Mon, 10 Feb 1997 09:05:42 +0100 (MET) Cc: Andrew.Gordon@net-tel.co.uk, hardware@FreeBSD.ORG, multimedia@FreeBSD.ORG In-Reply-To: <199702100104.SAA28311@clem.systemsix.com> from "Steve Passe" at "Feb 9, 97 06:04:05 pm" Reply-To: hm@hcs.de Organization: HCS Hanseatischer Computerservice GmbH X-Mailer: ELM [version 2.4ME+ PL15 (25)] Content-Type: text Sender: owner-multimedia@FreeBSD.ORG X-Loop: FreeBSD.org Precedence: bulk >From the keyboard of Steve Passe: > Anyone care to speculate exactly how much work it would be to start > with the existing BISDN driver and one of these cards and get to the > point of having a working ISDN for FreeBSD solution? In case you want to buy a Teles or AVM and use BISDN as a starting point, you will have to add support for the North American Layer 3 protocol on the D channel. Layer 1 and 2 should be the same as far as i know, but Layer 3 seems to be special. BISDN already supports 2 of those protocols, the old german-special 1TR6 and the very common DSS1 or "Euro-ISDN" protocol. > Where could one find the protocal specs for "the D channel"? I have no idea, ask your ISDN/Telephone company. For DSS1 the relevant standards are I.430 (Layer 1), Q.920/Q.921 (Layer 2) and Q.930/Q.931/Q.932 (Layer 3). They are sold by the ITU (www.itu.ch) but can also be found for much less money on the Infomagic "Standards CDROM". hellmuth -- Hellmuth Michaelis HCS Hanseatischer Computerservice GmbH Hamburg, Europe In their infinite wisdom, the folks at HP have decided that mere mortals such as you and I don't need to know what the kernel's proc structure looks like. (William LeFebvre, top 3.4 README, HP-UX 10.10)