[Elecraft] K3/RemoteRig Serial Question

[Mike Murray]

I've looked thru all of my manuals and still have a question regarding the
serial port on the remote site connection.  Does it use the same basic
connections as the K3 (pins 2,3, &5) or does it also utilize RTS and DTR
(pins 4 & 7)?  I would like to set up a remotely operated switch for the
serial connections as a backup, but want to be certain I get everything
that's needed.

73,
Mike - W0AG