Card Type	Serial controller
Chipset/Controller	Unidentified UART
I/O Options	Serial I/O ports (2)
Maximum DRAM	N/A

CONNECTIONS
Purpose	Location	Purpose	Location
DB-37 I/O port	CN1	6-pin RJ-11 I/O port	CN2

CHANNEL 1 LOOPBACK CONFIGURATION
Setting		J1
»	RTS/CTS loopback	Pins 1 & 5 closed, 1 & 2 open
	Transmit RTS	Pins 5 & 6 closed, 6 & 7 open
	Receive CTS	Pins 1 & 2 closed, 2 & 3 open
»	RCLK/XCLK loopback	Pins 3 & 7 closed, 2 & 3 open
	Transmit XCLK	Pins 6 & 7 closed, 5 & 6 open
	Receive RCLK	Pins 2 & 3 closed, 1 & 2 open
»	AUX OUT/AUX IN loopback	Pins 2 & 6 closed, 5 & 6, 6 & 7 open
	Half Duplex	Pins 4 & 8 closed
	Full Duplex	Pins 4 & 8 open

CHANNEL 2 LOOPBACK CONFIGURATION
Setting		J2
»	RTS/CTS loopback	Pins 1 & 5 closed, 1 & 2 open
	Transmit RTS	Pins 5 & 6 closed, 6 & 7 open
	Receive CTS	Pins 1 & 2 closed, 2 & 3 open
»	RCLK/XCLK loopback	Pins 3 & 7 closed, 2 & 3 open
	Transmit XCLK	Pins 6 & 7 closed, 5 & 6 open
	Receive RCLK	Pins 2 & 3 closed, 1 & 2 open
»	AUX OUT/AUX IN loopback	Pins 2 & 6 closed, 5 & 6, 6 & 7 open
	Half Duplex	Pins 4 & 8 closed
	Full Duplex	Pins 4 & 8 open

CHANNEL 3 LOOPBACK CONFIGURATION
Setting		J3
»	RTS/CTS loopback	Pins 1 & 5 closed, 1 & 2 open
	Transmit RTS	Pins 5 & 6 closed, 6 & 7 open
	Receive CTS	Pins 1 & 2 closed, 2 & 3 open
»	RCLK/XCLK loopback	Pins 3 & 7 closed, 2 & 3 open
	Transmit XCLK	Pins 6 & 7 closed, 5 & 6 open
	Receive RCLK	Pins 2 & 3 closed, 1 & 2 open
»	AUX OUT/AUX IN loopback	Pins 2 & 6 closed, 5 & 6, 6 & 7 open
	Half Duplex	Pins 4 & 8 closed
	Full Duplex	Pins 4 & 8 open

CHANNEL 4 LOOPBACK CONFIGURATION
Setting		J4
»	RTS/CTS loopback	Pins 1 & 5 closed, 1 & 2 open
	Transmit RTS	Pins 5 & 6 closed, 6 & 7 open
	Receive CTS	Pins 1 & 2 closed, 2 & 3 open
»	RCLK/XCLK loopback	Pins 3 & 7 closed, 2 & 3 open
	Transmit XCLK	Pins 6 & 7 closed, 5 & 6 open
	Receive RCLK	Pins 2 & 3 closed, 1 & 2 open
»	AUX OUT/AUX IN loopback	Pins 2 & 6 closed, 5 & 6, 6 & 7 open
	Half Duplex	Pins 4 & 8 closed
	Full Duplex	Pins 4 & 8 open

INPUT CLOCK FREQUENCY
MHz		J5
»	1.8432	Pins 1 & 2, 3 & 6, 4 & 5 closed
	3.6864	Pins 2 & 3, 4 & 5 closed
	9.216	Pins 1 & 2, 5 & 6 closed
	18.432	Pins 2 & 5 closed