From owner-freebsd-isdn@FreeBSD.ORG Fri Apr 4 11:36:13 2003 Return-Path: Delivered-To: freebsd-isdn@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9C5BA37B401 for ; Fri, 4 Apr 2003 11:36:13 -0800 (PST) Received: from beverly.kleinbus.org (p508E200A.dip.t-dialin.net [80.142.32.10]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6D02F43FBD for ; Fri, 4 Apr 2003 11:36:12 -0800 (PST) (envelope-from is@beverly.kleinbus.org) Received: by beverly.kleinbus.org (Postfix, from userid 1501) id D7F72E96F; Fri, 4 Apr 2003 21:35:55 +0200 (CEST) Date: Fri, 4 Apr 2003 21:35:55 +0200 From: Ignatios Souvatzis To: Helge Oldach Message-ID: <20030404193555.GA9775@beverly.kleinbus.org> References: <200304041022.h34AMi144844@flip.jhs.private> <200304041832.h34IWFJC069324@sep.oldach.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200304041832.h34IWFJC069324@sep.oldach.net> User-Agent: Mutt/1.4i cc: freebsd-isdn@freebsd.org cc: "Julian H. Stacey" Subject: Re: ISDN4BSD Modems & Cards X-BeenThere: freebsd-isdn@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Using ISDN with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 04 Apr 2003 19:36:13 -0000 Hi, On Fri, Apr 04, 2003 at 08:32:15PM +0200, Helge Oldach wrote: > Apart from the issues mentioned already there is a minor encapsulation > gain. While on an external TA you usually can run HDLC encapsulation > with byte stuffing only, an internal card would allow for bit stuffing > which is slightly more efficient. err... sane ISDN TA do (well, can be operated) in a mode where computer-side async HDLC is converted to line-side sync HDLC. Everything else would not interoperate with the PPP over ISDN at the other end. Unless you only want to run V110/V120 instead of full speed, of course. Regards, -is