[net.dcom] RS232 Gender

zben@umcp-cs.UUCP (10/26/83)

[From the virtual flamethrower of ZBEN]
 Yes, the standard states that the modem shall have a female connector.
It says nothing about the gender at the terminal.  I suppose you could
build a cheap terminal like my cheap casette deck.  There are no connectors
at the back panel, four cables are *attached* from the rear of the unit
and terminate in the standard RCA plugs.
 One of the standards used in connector design is that if possible the
connector that has power should be female.  Examine a home extension cord.
Note that the plug is mail and the socket is female.  Now consider what
would happen if the cord had two males.  When one end is plugged in and
the other is not it becomes quite a hazard.  A secondary consideration is
preventing damage to the equipment should the exposed male pins contact a
shorting substance such as metal.  Note also that all hot plates and other
cooking equipment with removable cords use the same standard, albeit with
a non-compatable (usually round pin) connector.
 In the case of RS232 both could have power, so the argument weakens.  But
the DB25 has a protective rim around the pins, so the problem should be
much less important.  The only way I could explain the brain-damaged 
current state of things is that perhaps cabinet mounted males were thought
to be more fragile, as the pins could be bent or broken off while moving
the equipment.
zben