Appendix E 100Base-FX/TX Module
The physical specification for Fast Ethernet cabling comes in three different flavors. These include 100Base-TX (2-pair over Cat 5 UTP), 100Base-T4 (4-pair over Cat 3 UTP), and 100Base- FX (2 fiber connections).
The 100Base-TX specification is the most popular cabling scheme for Fast Ethernet networks. Since it requires a UTP cable similar to 10Base-T, installation and configuration of 100Base- TX cabling is easy and cost-effective.
In contrast, the 100Base-FX specification requires the fiber optic cabling which is more expensive than the conventional UTP cabling. However, it has a definite appeal to widespread LANs where cost of wiring is less important than the distance it delivers to Ethernet LANs--400 meters for half-duplex segments and 2 kilometers for full-duplex segments.
For flexibility, the TE100-S55 provides an 100Base-FX/TX module that’s equipped with both Fiber Optic and UTP ports. It permit the users to choose the necessary cabling type that fits their individual needs.
The 100Base-TX port requires two-pair Category 5 UTP cable or two-pair Type 1 STP cable. It services distance of up to 100 meters and supports full or half-duplexing. The 100Base-FX port requires one pair of 62.5/125 micron fiber-optic cable. It services distance of up to 400 meters and supports full or half-duplex operation. It is an ideal solution for backbone connections.
Although the 100Base-FX/TX module is equipped with two ports (MIC and UTP connectors), please keep in mind that only one port may be used at a time.
How to Install the 100Base-FX/TX module
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