Multiplexer

4 Channel Multiplexer Card,
BA-6500-068

The Multiplexer card controls the connection between the handset pair and the particular shelf requested by the keypanel when a line is selected. The Multiplexer can control the connection to any one of up to four shelves according to the system configuration.

When the push-button for a line is pressed, the Telephone Interface Card (TIF) on the appropriate shelf is informed. The TIF requests the Multiplexer to select the handset pair for the appropriate shelf. The Multiplexer makes the connection and informs the TIF that the connection is satisfactory.

Multiplexer LEDS

	Handset 1
	LED1		Handset Off-Hook
	LED2		Handset Request - TIF 0 (Shelf 1)
	LED3		Handset Request - TIF 1 (Shelf 2)
	LED4		Handset Request - TIF 2 (Shelf 3)
	LED5		Handset Request - TIF 3 (Shelf 4)
	Handset 2
	LED6		Handset Request - TIF 0
	LED7		Handset Request - TIF 1
	LED8		Handset Request - TIF 2
	LED9		Handset Request - TIF 3
	LED10		Handset Off-Hook