Motorola MTM5400 Telco Connector Pin Function Description, Audio +, Bus +, Flta +

66 MTM5400 Mobile Terminal Installation Manual INSTALLATION

1	10
	10-Pin Telco Connector

13

1

	25-Pi n Back Connector
			25	14
	Figure 29 View of the Enhanced Control Head’s rear connectors
	Table 14 10-Pin Telco Connector
Telco Connector Pin	Function			Description
1	AUDIO +			Balanced Audio + (Bidirectional)
2	NC			Not Connected
3	BUS +	This is used for communication between the radio and an
				Enhanced Control Head.
4	AUDIO -			Balanced Audio - (Bidirectional)
5	NC			Not Connected
6	GND			Ground
7	Radio On/Off Control	This is the Enhanced Control Head service request input.
		A level of 5 volts indicates that the Enhanced Control Head
		needs to communicate with the radio. In addition it
		switches on the radio's voltage regulators. The idle state is
				a level below 0.6V.
8	SCI_TX	This if for communication between the radio and the
				Enhanced Control Head.
9	FLT_A +	This voltage is at battery voltage level and is available as
		long as the radio is connected to the supply voltage. The
		maximum current is 300mA. A fuse in the radio prevents
		further circuit damage in case of shorting this pin to
				ground.
10	Analog Ground			Analog Ground