Black Box LE14XXA, Modular Switches manual 4 4-Port Module, RJ-45 copper

Black Box Modular Switches Installation and User Guide (8/99)

2.2.44-Port Module, RJ-45 (copper)

The Black Box LE14XXA-		1		2	3		4 ACT
Series copper port module, model		LK
LE1425C, provides four 10/100Mb	x
			100/10			FDX/HDX
switched. RJ-45 ports. The 10/100Mb
switched ports are independently N-way auto-negotiating								LE1425C

for operation at 10 or 100Mb speed in full- or half-duplex mode (as a default setting). They independently move to half-duplex mode at 10 Mb or at 100Mb speed if the device at the other end of the twisted pair cable is half-duplex or is not an auto-negotiating device.

On the model LE1425C , there are four LED’s for each port. The LK (Link) indicate “ready for operation” when lit, the ACT (Activity) indicates receiving activity on that port, the 10/100 LED indicates operation at 100Mb speed when ON and at 10 Mb speed when OFF (when auto-negotiation is not disabled), and the FDX/HDX LED is ON to indicate full-duplex operation and OFF, to indicate half-duplex mode. A twisted pair cable must be connected into each RJ-45 10/100Mb port and a proper link (LK lit) must be made with the device at the other end of the cable in order for the LEDs to provide valid indications of operating conditions.

Internal jumper settings (See Section 3.4) allow technicians to over-ride the auto- negotiation feature and to manually set each port at full-duplex or half-duplex. One port on each RJ-45 4-port module is equipped with a Media Dependent Interface-Crossover (MDI-X) push button switch to simplify cascaded or up -link connections.

2.2.5Combo 4 Port Modules, “3 + 1”, 3 RJ-45 and 1 fiber port

The combo 4-port modules are
	LK	1	2	3	4		ACT
combination of copper and fiber media,
	FDX/HDX
available as three 10/100 switched RJ-45
copper ports and one 100Mb switched			100/10			FDX/HDX
multi-mode fiber ST or SC port or single-mode SC port.
				LE1426C

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