beautypg.com

Net Optics Fiber Mode Converters User Manual

Page 11

background image

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)