TABLE OF CONTENTS This appendix provides a brief set of data concerning the most commonly used distribution functions. More complete results are nowadays easy to obtain, through specific software packages or more comprehensive tables available e.g. on CD ROMs or on the Web. The goal of the following tables and graphs is to allow quickly visualising and quantifying the behaviour of important laws.
Erlang loss formula
E( N, A) = B = 
Erlang tables
A (offered traffic) as a function of B (loss probability) and N (number of servers).
| B% ? N | 0.01 | 0.03 | 0.05 | 0.1 | 0.2 | 0.3 | 0.5 |
|---|---|---|---|---|---|---|---|
| 1 | 0.0001 | 0.0003 | 0.0005 | 0.001 | 0.002 | 0.003 | 0.005 |
| 3 | 0.0868 | 0.127 | 0.152 | 0.194 | 0.249 | 0.289 | 0.349 |
| 5 | 0.452 | 0.577 | 0.649 | 0.762 | 0.900 | 0.994 | 1.13 |
| 7 | 1.05 | 1.27 | 1.39 | 1.58 | 1.80 | 1.95 | 2.16 |
| 10 | 2.26 | 2.61 | 2.80 | 3.09 | 3.43 | 3.65 | 3.96 |
| 15 | 4.78 | 5.34 | 5.63 | 6.08 | 6.58 | 6.91 | 7.38 |
| 20 | 7.70 | 8.44 | 8.83 | 9.41 | 10.1 | 10.5 | 11.1 |
| 25 | 10.9 | 11.8 | 12.3 | 13 | 13.8 | 14.3 | 15 |
| 30 | 14.2 | 15.3 | 15.9 | 16.7 | 17.6 | 18.2 | 19 |
| 35 | 17.8 | 19 | 19.6 | 20.5 | 21.6 | 22.2 | 23.2 |
| 40 | 21.4 | 22.7 | 23.4 | 24.4 | 25.6 | 26.3 | 27.4 |
| 50 | 28.9 | 30.5 | 31.3 | 32.5 | 33.9 | 34.8 | 36 |
| 60 | 36.6 | 38.5 | 39.4 | 40.8 | 42.4 | 43.4 | 44.8 |
| 70 | 44.6 | 46.6 | 47.7 | 49.2 | 51 | 52.1 | 53.7 |
| 80 | 52.7 | 54.9 | 56.1 | 57.8 | 59.7 | 61 | 62.7 |
| 90 | 60.9 | 63.4 | 64.6 | 66.5 | 68.6 | 69.9 | 71.8 |
| 100 | 69.3 | 71.9 | 73.2 | 75.2 | 77.5 | 78.9 | 80.9 |
| 120 | 86.2 | 89.2 | 90.7 |
