From owner-freebsd-isp Sat Apr 17 14:16:29 1999 Delivered-To: freebsd-isp@freebsd.org Received: from picnic.mat.net (picnic.mat.net [206.246.122.133]) by hub.freebsd.org (Postfix) with ESMTP id C3B6A14EAF for ; Sat, 17 Apr 1999 14:16:26 -0700 (PDT) (envelope-from chuckr@picnic.mat.net) Received: from localhost (chuckr@localhost) by picnic.mat.net (8.9.3/8.8.5) with ESMTP id RAA15862; Sat, 17 Apr 1999 17:11:21 -0400 (EDT) Date: Sat, 17 Apr 1999 17:11:21 -0400 (EDT) From: Chuck Robey To: Bill Vermillion Cc: freebsd-isp@FreeBSD.ORG Subject: Re: cheapo 56k hardware In-Reply-To: <199904172102.RAA85032@bilver.magicnet.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-isp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Sat, 17 Apr 1999, Bill Vermillion wrote: > The problem you have is that any digital modem at 56K as the ISP is > going to require a PRI (most probably) and a device that > interfaces. > > 56K modems can't be used at the ISP because 56K to 56K is limited > to 33.3K > > > If this is a multithousand buck answer, it's not gooing to be > > really practical, so please don't make gold plated suggestions > > without awfully good reasons behind it (better than just enhanced > > reliability). > > 56K requires a digital link from the ISP through telco, to > destination so there is no D/A conversion. The home to ISP > is analog and therefore requires a D/A at the home and an A/D at > the ISP. Doing two AtoD and DtoA conversions limits you to 33.3. > > It's not going to be cheapo. You can find all sorts of devices on > the used marked below 56K - but the last time I looked the 56K > devices were still pretty expensive in comparison. Ahh. The ISP in question has a 128K frame relay line, but that would be a drop in the bucket. So he has to go buy the service from the telco? Or he has to have a T1 from the telco, those are the alternatives? Yecch! > > > > -- > bill@bilver.magicnet.net | bv@wjv.com > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-isp" in the body of the message > ----------------------------+----------------------------------------------- Chuck Robey | Interests include any kind of voice or data chuckr@picnic.mat.net | communications topic, C programming, and Unix. 213 Lakeside Drive Apt T-1 | Greenbelt, MD 20770 | I run picnic (FreeBSD-current) (301) 220-2114 | and jaunt (Solaris7). ----------------------------+----------------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message