365-575-102 Detailed Level Procedure: DLP-512
Issue 8.0, July 2002 Page 5 of 14
Table D lists some of the available multi-mode jumpers for use when
connecting a low speed span through an LGX.
Span Lengths
NOTE:
SIngle-mode fiber is loss limited, so only the received power needs to be
measured. Multi-mode fiber is dispersion limited, not loss limited, thus
requiring this additional consideration for the span length. The receive end
power must still be measured to ensure that the power level to the receiver
is not too high nor too low, however, it can not be assumed that because the
power level is within range, that the signal quality is adequate. At the
receive end there may be sufficient power, but the signal shape may not be
adequate. The length of fiber that is allowed must be determined by the
type and manufacturer of the multi-mode fiber.
Table E shows the approximate maximum distances allowable for different
fiber bandwidth specifications.
NOTE:
For more detailed information about maximum span lengths for particular
fibers, refer to the manufacturers specifications.
While considering the application (Table A), and as appropriate, select the cor-
rect jumper from Table B or Table D.
Table D – Multi-mode fiber jumpers
Code Comcode length (feet)
FL1E-E-2 1053517952
FL1E-E-10 105351837 10
FL1E-E-25 105351860 25
FL1E-E-50 105351910 50
FL1E-E-100 105351936 100
Table E – Multimode Operation Span Length
Fiber Bandwidth
Specification
Maximum Span Length
(km)
Maximum Span Length (miles)
1000 MHz-km 6.5 km 4.1 miles
800 MHz-km 5.1 km 3.2 miles
500MHz-km 3.1 km 1.9 miles
300 MHz-km 1.8 km 1.1 miles
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