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2 - 2 ONline Ethernet 10BASE-FB Module Installation and Operation Guide
Understanding the General Rules
This section describes general rules for configuring an Ethernet network
using fiber as the backbone medium. It also provides rules to ensure that
your network configuration conforms to distance limitations imposed by
Ethernet and networking equipment. Use these guidelines for building
your network.
Refer to the sections that follow for specific rules for:
❑ Determining maximum 10BASE-FB fiber link distances
❑ Connecting various horizontal media types (10BASE-FB, twisted pair)
to a 10BASE-FB backbone
❑ Examples of recommended fault-tolerant configurations
Rules for Configuring a Network
This section outlines the network rules and recommendations for building
an Ethernet network. For more hardware-specific information on the
10BASE-FB, refer to Appendix A.
Table 2-1. Basic Network Rules
Rule Definition Recommendations/Notes
1 Use 10BASE-FB as the
backbone medium.
Use 62.5 micron cable to
conform with the IEEE 10BASE-F
and ANSI FDDI standards.
Use ST-type connectors.
2 Wire the backbone in a
star topology to isolate
faults.
Lay extra fiber cables. The extra
cost is small and you will need
them as your network grows.