RYSTAL
model(s) wire color pn number
CBR-1800 Audio 1
CBR-1700 Ground 2
  N/C N/C
  Common 2
  PTT 4
  receive 3
model(s) wire color pn number
CB-523 Audio 1
  Ground 4
  N/C N/C
  Common 2
  PTT 3
  receive N/C