Re: Merchant account (VISA) software
Dan Hollis (goemon@sasami.anime.net)
Mon, 14 Sep 1998 22:25:31 -0700 (PDT)
On Mon, 14 Sep 1998, Nicholas J. Leon wrote:
> On Thu, 10 Sep 1998, Dave Cinege wrote:
> # All these transaction terminals are just little modems that feed the info
> # and wait for replies. I'm guessing this is just send-expect ASCII strings.
> # I'm going to look into this and see about writing my own.
> I used to do just this professional: credit card verification and
> transaction recording for gas pumps (I worked for Gilbarco in their
> software verification lab). The protocol is VERY simple, and when I was
> using it (appx 2-3 years ago), the connection was a basic 2400/7E1 type.
> But it is basically just an ASCII stream. (vendor ID->ok, <security
> stuff> -> ok, cc info -> ok, amount -> ok, goodbye -> ok).
Indeed. The hard stuff isnt the protocol itself, but rather the billing
semantics they inflict on the end users, and the mess it creates for the
programmer.
-Dan
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