474 



BELL SYSTEM TECHNICAL JOURNAL 



f{0)c'=+^R"'(l - ny-' 



1 + 



uR 



dit = 



/(0)c^+ii?"' 



[1 - (1 - R)ii'y-^du 



P {> 0){c - a)i?("-i)^[l - (1 - R)Hj-'du. 



We now obtain by integration with reference to ic, summation with 

 reference to n, or both, the following results. 



Character of Delay 



Probability of Delay 



From (m — 1 + u)h to nh 

 From (n — l)h to nh 

 Greater than {n — l)h 

 Greater than (n — 1 + u)h 



Average delay on all calls 



P {> 0)i?("-"^([l - (1 - R)iiy - R') 

 P (> O)^?^''-!)^! - R') 

 P {> 0)i?("-i''^ 



p(> o)i?("-i)ii - (1 - RyiiJ 



