RoIP: URI pin

Table 1. Connector Pin Assignments

Pin No.	Name	Description
1	PTT	Push to talk, open collector output to radio transmitter, maximum off state voltage 45V, maximum on state current 0.75 amps
2	GPIO1	General purpose input or output (note 1)
3	GPIO2	General purpose input or output (note 1)
4	GPIO4	General purpose input or output (note 1)
5	GPIO5	General purpose input or output (note 1)
6	GPIO6	General purpose input or output (note 1)
7	CTCSS_DET Input, diode isolated, continuous tone-coded squelch system detect (note 2)
8	COR_DET	Input, diode isolated, receive (carrier operated relay) detect (note 2)
9	MIC_IN	Direct low-level audio input to CM119, must be AC coupled (note 3)
10	GPIO7	General purpose input or output (note 1)
11	GPIO8	General purpose input or output (note 1)
12	AOUT	AC coupled output from 6dB gain amplifier
13	GND	Ground
14	+5V	5 volts DC power output from USB bus
15	EEP_CS	EEPROM chip select control
16	EEP_CK	EEPROM serial clock	17	EEP_DI	EEPROM data input
18	EEP_DO	EEPROM data output
19	GND	Ground
20	GND	Ground
21	MIC_AC	Audio input, line level, AC coupled
22	LEFT_OUT	AC coupled left audio output, 4KHz bandwidth
23	RIGHT_OUT AC coupled right audio output, 4KHz bandwidth
24	AIN	AC coupled input to 6dB gain amplifier
25	AVDD	12 volt DC power input required for 6dB gain amplifier