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Path: utzoo!linus!security!genrad!decvax!minow
From: minow@decvax.UUCP (Martin Minow)
Newsgroups: net.dcom
Subject: Re: DB-25 Gender - (nf)
Message-ID: <256@decvax.UUCP>
Date: Thu, 3-Nov-83 19:41:53 EST
Article-I.D.: decvax.256
Posted: Thu Nov  3 19:41:53 1983
Date-Received: Sun, 6-Nov-83 18:56:58 EST
References: <3634@uiucdcs.UUCP>
Organization: DEC UNIX Engineering Group
Lines: 22

One of the problems with RS232 gender is that many manufacturers
do not understand how to build RS232 ports, and you can find
all kinds of strange systems floating around.  In my lab
at work, we are blessed with an in-circuit emulator which
needs a male-male null modem to connect it to the outside
world.  In fact, if I look around, I can also find female-female
straight-through cables, too (female-female cables are usually
null-modems).

Even when you understand the problems, you may not be able to
offer correct solutions.  DECtalk has two terminal ports which
connect to a host computer and a local terminal respectively.
Since one port is a DTE (DECtalk is a terminal) and the other
is a DCE (DECtalk is the host), we should have one male and
one female connector.  But the field-service people don't have
a male data loopback connector for testing, so we have two
male connectors and will ship a female-female null modem
cable to simplify connection to a local terminal.

Martin Minow
decvax!minow