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REQUIREMENTS/SPECS.
2.1.1 Fiber Optic Requirements
• The fiber optic link segments should consist of
single mode 8/125 - 12/125 µm fiber optic cabling.
You can also use multi mode 62.5/125 µm fiber optic
cabling, but signal distance will be much shorter
(about 2 km).
• The link segment must be tested with a fiber optic
attenuation test set that is adjusted for a 1300 nm
wavelength. This test verifies that the signal loss in a
cable is within an acceptable level of -10.0 dB or less
for any given single mode fiber optic link.
• When determining the maximum fiber optic cable
length, the fiber optic budget and total network
propagation delay should be calculated and taken into
consideration before fiber runs are incorporated in
any network design. Fiber optic budget is the
combination of the optical loss due to the fiber optic
cable, in-line splices, and fiber optic connectors.
Propagation delay is the amount of time it takes a
packet to travel from the sending device to the
receiving device. If the total propagation delay
between any two nodes anywhere on the network
exceeds 25.6 µs, then you should use bridges.