D-Link DFE-2600 Series, Руководство пользователя

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Dual-Speed Stackable Hubs User’s Guide
Making Connections 34
•
FDX—This LED is lit when the fiber optic port is set for Full Duplex
transmit and receive. When the LED is off, the fiber optic port is in
Half Duplex mode.
The duplex mode DIP switch allows you to set the fiber optic lines to Full
Duplex mode operation. Only the right-hand switch (number 2) is active.
Use it to set the duplex mode.
Fast Ethernet Module (DFE-260TX)
The Fast Ethernet module provides one additional twisted-pair Fast
Ethernet connection. A twisted-pair connection of this kind is particularly
useful for creating a link between two DFE-2600 series hub stacks, placing
them in separate collision domains. A link of this sort eliminates the need
for an external switch to divide stacks into separate domains. Dividing the
stacks into separate collision domains overcomes the Fast Ethernet two-
repeater limitation, and effectively doubles overall bandwidth.
The Fast Ethernet module uses a MDI-X connector (not a straight MDI)
and, therefore, a crossover cable must be used when connecting the module
to another module (and under most other circumstances). See Appendix A
for pinout information.
The Fast Ethernet module includes the following LED indicators:
•
Power/Tx—This LED is lit when the hub is on and blinks when pack-
ets are being transmitted by the module.
•
Link/Rx—This LED is lit when the port is properly connected to a
powered-on device and blinks when packets are being received by the
module.