Page 131 - DCAP406_DCAP_207_Computer Networks

Computer Networks/Networks

Notes Figure 8.9: Hardware Configuration of 100BaseT4

Figure 8.10 shows the hardware configuration of 100BaseFx. The SC connector that is a push-
lock-type is recommended for use as an interface connector. However, some other connectors
including the ST connector are also defined as options. Two fiber cables one for transmission
and the other for reception are required for each connection.

Figure 8.10: Hardware Configuration of 100BaseFx

Fiber Optic Extensions

Fiber is a very flexible in nature and provides less attenuation and good immunity to noise.
Optical fiber with fiber modem is used to extend a LAN beyond its limit. Figure 8.11 illustrates
the concept of fiber modem to extend an Ethernet connection. A fiber modem is inserted between
AUI and fiber optic cable at both the segments of Ethernet. This AUI connection may come
directly from computer or transceiver depending upon the type of wiring being used. Fiber
modems perform the conversion AUI signal to digital representation and light pulses, which
can be sent along the fiber optic cable and vice versa. This mechanism can operate effectively for
several kilometers. They are used widely to connect computers located in different buildings.

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