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+//Fiber Optics Communication Technology, by Djafer K. Mynbaev and Lovell L.scheiner
+//Windows 7
+//Scilab version- 6.0.0
+//Example 3.2.2
+clc;
+clear;
+//given
+
+A=0.5;//Attenuation in dB/km
+Pin=1E-3; //Power launched in mW
+Pout=50E-6; //Receiver sensitivity in uW
+e=Pin/Pout;
+s=10/A;
+d=log10(e);
+lmax=s*d;//maximum transistion distance
+
+mprintf("Maximum transistion distance = %.2f km",lmax);