UNIMETRICS
model(s) wire color pin number
DOLPHONE Audio 1
  Ground 2
  N/C n/c
  Common 3
  PTT 2
  receive N/C
model(s) wire color connection
SEA HORSE I Audio M4
  Ground G
(Hi-Z, Use an amplified mic only) N/C N/C
  Common B1
  PTT T2
  receive R3
model(s) wire color pin number
MARLIN I Audio 4
PORPOISE I Ground GND
MAKO I N/C n/c
  Common 1
(Hi-Z, Use an amplified mic only) PTT 2
  receive 3
model(s) wire color pin number
STING RAY II Audio 1
  Ground 4
  N/C N/C
  Common 3
  PTT 2
  receive 5