From owner-freebsd-questions Wed Jun 16 3:42:39 1999 Delivered-To: freebsd-questions@freebsd.org Received: from titan.metropolitan.at (mail.metropolitan.at [195.212.98.131]) by hub.freebsd.org (Postfix) with ESMTP id 6BE2C14F46 for ; Wed, 16 Jun 1999 03:42:35 -0700 (PDT) (envelope-from mladavac@metropolitan.at) Received: by TITAN with Internet Mail Service (5.0.1458.49) id ; Wed, 16 Jun 1999 12:45:03 +0200 Message-ID: <55586E7391ACD211B9730000C1100276179677@r-lmh-wi-100.corpnet.at> From: Ladavac Marino To: 'Jonathon Doran' , freebsd-questions@freebsd.org Subject: RE: Host-based modems Date: Wed, 16 Jun 1999 12:38:42 +0200 X-Priority: 3 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.0.1458.49) Content-Type: text/plain Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > -----Original Message----- > From: Jonathon Doran [SMTP:doranj@Colorado.EDU] > Sent: Wednesday, June 16, 1999 6:35 AM > To: freebsd-questions@freebsd.org > Subject: Re: Host-based modems > > > Have drivers been written to support 'host-based' modems (also known > > as 'Winmodems"? > > > > Even if its built in, why would anyone want a modem which requires a > power > cycle of the box in order to reset? Externals are great in this dept: > when > they get wedged, just toggle power on the modem. [ML] No, no, no, a winmodem is worse than that; an internal modem that emulates/has an UART and behaves like something behind a serial port is supported. But your typical winmodem does not *have* an UART; most of them do not even have the DSP chip required for bit extraction from the line "noise"--they let CPU do everything (the DSP algorythms are implemented in the driver). Since the line protocols are patented, there is no possibility for a (distributable) free software implementation thereof. Not to mention the fact that the access to the AD/DA circuitry is not documented and varies from model to model of a winmodem. They are cheap junk, the winmodems. However, there are internal modems which do provide their own UARTs and behave as normal modems behind a serial port. Sometimes these modems are also called winmodems, even though they are not and are supported. /Marino > Jon Doran > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message