Date: Sat, 17 Apr 1999 17:11:21 -0400 (EDT) From: Chuck Robey <chuckr@picnic.mat.net> To: Bill Vermillion <bill@bilver.magicnet.net> Cc: freebsd-isp@FreeBSD.ORG Subject: Re: cheapo 56k hardware Message-ID: <Pine.BSF.4.10.9904171710010.15061-100000@picnic.mat.net> In-Reply-To: <199904172102.RAA85032@bilver.magicnet.net>
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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
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