UTAC
model(s)	wire color	pin number
MICROMINI 23	Audio	1
ST-23	Ground	6
	N/C	2
(not compatible with silver eagle plus)	Common	4
	PTT	5
	receive	3
model(s)	wire color	pin number
TRX-30	Audio	1
TR-18M	Ground	2
	N/C	N/C
	Common	2
	PTT	3
	receive	N/C
model(s)	wire color	pin number
STUDIO-4000	Audio	1
	Ground	3
(Hi-Z, Use an amplified mic only)	N/C	n/c
	Common	3
	PTT	2
	receive	n/c
model(s)	wire color	pin number
TRX-2000	Audio	3
	Ground	2
(Hi-Z, Use an amplified mic only)	N/C	N/C
	Common	2
	PTT	1
	receive	N/C
model(s)	wire color	pin number
TRX-400	Audio	1
TRX-500	Ground	3
	N/C	N/C
(Hi-Z, Use an amplified mic only)	Common	3
	PTT	2
	receive	4