[Elecraft] RJ-11 connector on bottom of the Front Panel

[Brian Moran]

What signals are available on the RJ-11 connector on the bottom of the front panel?  I see some lines on the schematic that indicate the data bus is available.

Can the signals on the RJ-11 be controlled via macros, or can I cause a front-panel button to put something on those control lines without otherwise performing an in-radio operation?

I have an external switching matrix for listening antennas that I'd like to control via the front-panel; I theorize that I could build something that snoops the data bus via the RJ11 and then use M1-M4 to control which RX antenna I'm listening to....

Brian N9ADG