Specifications A - 7
❑3Com Fault-Tolerant 10BASE-FB Transceiver - The 3Com
Fault-Tolerant 10BASE-FB Transceiv er (Model Number 5102T-FBFT)
provides fault tolerance to-the-d esktop. The transceiver co nnects an
existing network to a fault-tole rant fiber backbone network. It also
provides a fault-tolerant ne twork connection for a m ission-critical
device.
❑3Com 10BASE-FB Star Coupler - The 3Com 10BASE-FB Star Coupl er
(Model Number 9308S-FB) is a pure fiber hub that pro vides both
backbone and to-the-desk connecti vity.
10BASE-FB Cable and Connector Specifications
This section contains informatio n on 10BASE-FB cables, and conn ec tors.
Use the information in the follow ing sections to ensure that the cables and
connecting hardware meet requirements .
You can use many types of fiber cables and connectors to link your
10BASE-FB Module to your network. T hes e cables and connectors are
explained in the sections that follow. For pro per operation, use only
approved cables when you install all equipment.

10BASE-FB Cables

The fiber optic cable diameters that the 10BA SE-FB Module supports must
meet the following qualifications:
❑50/125, 62.5/125, 85/125, or 10 0/140 µm graded index fiber
❑duplex fiber with a 150 MHzKm rating o r better
Note that network link distances are a ffected by the grade of cable you
choose. The quality of fiber cable varies significantly. Ty pically, measure
quality in terms of the signal loss p er km. The less amount of loss, the
better the cable quality. Good quality 6 2.5 µm fiber typically has a 3 to 4
dB loss per kilometer.