Cisco Cisco FastHub 412M 10 100 Repeater

The 100BaseFX switched uplink module, hereafter referred to as the 100BaseFX switch module, has 
a switched 100BaseFX port for 100-Mbps fiber-optic connectivity (Figure 2). By default, the port 
operates in half-duplex mode. However, you can set the port to full-duplex operation.

The 100BaseFX switch module has LEDs (LINK and DUP) that reflect the status and duplex mode 
of the module port. These LEDs are described later in this section.

The port complies with the IEEE 802.3u 100BaseT standard and uses 50/125- or 62.5/125-micron 
multimode fiber-optic cabling with a duplex SC connector. When set to full-duplex mode, the 
100BaseFX module port can connect to another 100BaseFX-compatible device over distances of up 
to 2 kilometers. In half-duplex mode, the module port can connect to other compatible devices over 
distances of up to 412 meters.

100BaseFX Module Port Status LED

The colors of the LINK LED show the status of the module port (Table 4).

100BaseFX Module Port Duplex Mode LED

The colors of the DUP LED show that the module port is operating in either half- or full-duplex 
mode (Table 5).

Off

No link.

Solid green

100BaseFX link operational.

Flashing green

100BaseFX link operational (with activity).

Off

Operating in half-duplex mode.

Solid green

Operating in full-duplex mode.

14522

DUP

LINK

100 BASE-FX

RX

TX

Port status LED

Duplex mode LED

Backplane connector

100BaseFX port