/* CW keying */
** 5 GND - ground
** 7 RTS - PTT
* '''ttys''' - same as ttys for PTT and CW on single pin (FT8x7 via DATA connector).
* '''davac4''' - USB SSB/CW keyer [[Davac4]] by OK1ZIA. No device is required, it uses USB device A600:E110.
* '''cwdaemon''' - controls [http://cwdaemon.sourceforge.net/ cwdaemon] by Joop PG4I. Obsolete, not fully working (CQ repeat). Please use direct access to keying device.