Date: Mon, 23 Sep 1996 08:18:46 -0400 From: "Louis A. Mamakos" <louie@TransSys.COM> To: Julian Elischer <julian@whistle.com> Cc: dennis <dennis@etinc.com>, hackers@freebsd.org Subject: Re: VC support, *BSD and atm/frame/isdn Message-ID: <199609231218.IAA08475@whizzo.transsys.com> In-Reply-To: Your message of "Sun, 22 Sep 1996 22:46:28 PDT." <32462434.4A7B7C1D@whistle.com> References: <199609230411.AAA11548@etinc.com> <32462434.4A7B7C1D@whistle.com>
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> I don't think it's particularly efficient, but it's > not expected to be running under very heavy usage in this version. > I believe that they went out and did a scan of several providers to > see if they could use them but somehow ended up doing it that way. > I do know that they had a hard time trying to work out what pinouts to > use for connecting a V35 connector to a connector small enough for > a back plate, and that they liked your DB25 implimentation. > I've scanned the literature but I haven't found an "Official" > or even "defacto" standard on how to do this.. the V35 connector is SOO > clunky. I've been meaning to ask you... did you find that pinout > somewhere, or did you make it up..? Please, don't invent a new pin out for the connector! Use a DB25 and have it be EIA-530 compatible. This is essentially a superset of the V.35 "spec" in terms of the line drivers and receivers, and using a simple adapter cable, you can get to a V.35. I think that EIA-530 is recommended for new applications, and certainly the cost is lower, too. Though in most cases, your customers can just purchase EIA-530 compatible CSU/DSUs, and use a straight-thru DB25 cable. That way, there are no large, clunky Winchester connectors around at all to cause injury. Louis Mamakos
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