3Com S27x, S26x, S24x installation manual Run, Sysfail

Hardware Components

Required cables The following cables, including two pigtail cables, ship with the E1 dual port digital PBX interface card and are required to cable the E1 card to the DSPM/SM cards in the PathBuilder S24x, 26x, and 27x switch node.

	Cable Description			Function
	One 4-position 40-pin		Connects up to three DSPM/SM cards to
	MVIP ribbon cable		interconnect digital voice traffic between individual
			cards in the same PathBuilder S24x, 26x, and 27x
			switch node.
	One 8-position, 40-pin		Connects four or more DSPM/SM cards to
	MVIP ribbon cable		interconnect digital voice traffic between individual
			cards in the same PathBuilder S24x, 26x, and 27x
			switch node.
	Two 8-pin modular to DB15		For 120Ω connection.
	cables
	Two 8-pin modular to BNC		For 75Ω connection.
	cables
LED Status
	The E1 dual port digital PBX interface card contains four LEDs that can be viewed
Indicators	through the rear bracket:
	LED	Color	LED is...	...Indicating
	Port 49	Yellow	OFF	Normal operation
			ON	Carrier failure on Port 49 span
	Port 50	Yellow	OFF	Normal operation
			ON	Carrier failure on Port 50 span
	RUN	Green	OFF	Card failure
			ON	Microprocessor Activity
	SYSFAIL	Yellow	OFF	Normal operation
			ON	Card failure

1-22 About the PathBuilder S24x, 26x, and 27x switch