TELEPHONE TRAFFIC TIME AVERAGES 



1141 



1.0 



HI O.J 



z5 



I- 



0.6 



0.4 



0.2 



0.5 



1.0 



2.0 2.5 3.0 3.5 4.0 



HOLDING TIME UNITS, T 



5.0 



Fig. 1. — Comparison of variances of average traffic for constant and exponential hold- 

 ing times. 



1.0 



0.8 



z 

 < 



uj 0, 



to 



Ol- 

 P 0. 



< 



0.5 



1.5 



2.0 2.5 3.0 3.5 4.0 

 HOLDING TIME UNITS, T 



4.5 



•6.0 



Fig. 2. — Cumulants kz, ka, and k4 for constant holding time. 



0.5 



2.0 2.5 3.0 3.5 4.0 



HOLDING TIME UNITS,! 



5.5 



Fig. 3. — Cumulants k2, ka and k4 for exponential holding time. 



