Black Box LE14XXA Manual De Usuario
Black Box Modular Switches
Installation and User Guide (8/99)
9
2.2.4
4-Port Module, RJ-45 (copper)
The Black Box LE14XXA-
Series copper port module, model
LE1425C, provides four 10/100Mb
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) indicates
“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.
2.2.5
Combo 4 Port Modules, “3 + 1”, 3 RJ-45 and 1 fiber port
The combo 4-port modules are
combination of copper and fiber media,
available as three 10/100 switched RJ-45
copper ports and one 100Mb switched
multi-mode fiber ST or SC port or single-mode SC port.
LE1426C
100/10
FDX/HDX
LK
x
ACT
1 2 3 4
LK
FDX/HDX
ACT
100/10
1 2 3 4
FDX/HDX