3Com S24x, S27x, S26x installation manual Hardware, Components, Component Description, Dspm/Sm

Hardware Components

Hardware	This table lists and briefly describes the hardware components that make up the
Components	PathBuilder S24x, 26x, and 27x switch. More detailed descriptions of these
	components follow.
	Component	Description
	Enclosure	A rack-mount unit that contains all the PathBuilder S24x,
		26x, and 27x switch processor cards.
	Back Panel	Contains power outlets, power switch, communication ports,
		and slots for I/O cards.
	Motherboard	Contains five data ports:
		• Ports 1 and 2 are DIM ports
		• Port 3 is a high-speed/V.36 DTE port
		• Port 4 is the Ethernet AUI port
		(see below for limitations)
		• Port 6 is reserved for the control terminal port
		Contains eight full-size expansion slots.
	Integral DSU DIM	An option used in installations requiring connection to a
	(Optional)	DDS interface conforming to AT&T 62310 or
		ANSI T1E1.4/91-006, and running at 56 kbps.
	10Base2	Lets you accommodate different network configurations
	Transceiver for AUI	through the user-selectable Signal Quality Error (SQE)
	ports (optional)	function.
	T1 Dual Port	The T1 dual port digital PBX interface card supports digital
	Digital PBX	voice communications, providing integrated network access.
	Interface Card	The T1 digital interfaces are used for both voice and data
	PathBuilder S24x,	traffic.
	26x, and 27x
	E1 Dual Port	The E1 dual port digital PBX interface card supports digital
	Digital PBX	voice communications, providing integrated network access
	Interface Card	(see Figure 1-12).
		The E1 interface card is used to support both voice and data
		traffic.
	DSPM/SM	The DSPM/SM card, used at nodes with digital PBX
		interfaces, compresses four digital voice channels. It has no
		external I/O capabilities.
	DSPM with FXS	The analog DSPM/FXS card allows the PathBuilder S24x
	Analog Interface	switch to support up to two voice/fax channels per card. Each
		DSPM/FXS card occupies one ISA slot in the PathBuilder
		S24x switch.
	DSPM with FXO	The analog FXO daughtercard (when mounted on the
	Analog Interface	DSPM/HC) allows the PathBuilder S244 and S254 switch to
		support one voice/fax channel per card. Each DSPM/HX
		with FXO daughtercard combination occupies one ISA slot
		in the PathBuilder S244 and S254 switch.

About the PathBuilder S24x, 26x, and 27x switch 1-9