Lucent Technologies Octel Unified Messenger Concepts and Planning Guide 101-1620-005 - Manual (Page 105)

Appendix B - Grade of service
101-1620-005 B-5
Table B-4. Maximum busy hour traffic supported for a GOS of P.05
Ports Erlangs CCS Minutes
4 1.50 54 90.00
8 4.53 163 271.67
12 7.94 286 476.67
16 11.53 415 691.67
20 15.22 548 913.33
24 19.03 685 1141.67
28 22.86 823 1371.67
32 26.72 962 1603.33
36 30.64 1103 1838.33
40 34.58 1245 2075.00
44 38.56 1388 2313.33
48 42.53 1531 2551.67
52 46.53 1675 2791.67
56 50.53 1819 3031.67
60 54.56 1964 3273.33
64 58.58 2109 3515.00
68 62.64 2255 3758.33
72 66.67 2400 4000.00