Net Optics Fiber Mode Converters - Manual (Page 11)

Fiber Mode Converter
7
Examples
Maximum of 512 total bit times between the two farthest DTEs
DTE TX to DTE FX has 100 bit times delay
CFT converter has a 50 bit time delay
Class I repeater has 140 bit times delay
TX cable has 1.112 bit times delay per meter
F/O cable has 1.0 bit times delay per meter
If cable B to C is 5 meters of Cat 5, and cable C to D is 87 meters of Cat 5,
then how long can the F/O cable, A to B be?
Total maximum bit time +512
Less DTE TX to DTE FX -100
Less Class I repeater -140
Less CFT converter -10
Less (5m x 1.112) -5.56
Less (87m x 1.112) -96.74
Remaining bit time +159.7
Remaining bit time divided by the cable delay time per meter of F/O cable
yields 159 meters of total fiber optic cable available to use.
(159.7/1.0 = 159.7 m)