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Avaya Modular Messaging Concepts and Planning Guide
A-2 November 2004
Avaya Modular Messaging Concepts and
Planning Guide
Table A-1. Average number of ports in use during the busy hour
Ports P. 01 P. 0 2 P. 0 3 P.0 4 P.0 5 P.01 P.02 P.03 P. 04 P. 05
—
Erlang B Model Erlang C Model
4
0.87 1.09 1.26 1.40 1.52 0.89 1.09 1.23 1.34 1.43
8
3.13 3.63 3.99 4.28 4.54 3.13 3.53 3.80 4.01 4.18
12
5.88 6.61 7.14 7.57 7.95 5.84 6.40 6.77 7.05 7.28
16
8.88 9.83 10.51 11.06 11.54 8.79 9.49 9.94 10.29 10.56
20
12.03 13.18 14.00 14.66 15.25 11.91 12.72 13.25 13.64 13.96
23
14.47 15.76 16.68 17.42 18.08 14.32 15.21 15.78 16.21 16.56
24
15.30 16.63 17.58 18.35 19.03 15.14 16.05 16.64 17.08 17.44
30
20.34 21.93 23.06 23.99 24.80 20.12 21.18 21.85 22.35 22.76
32
22.05 23.73 24.92 25.89 26.75 21.82 22.92 23.61 24.13 24.55
36
25.51 27.34 28.65 29.72 30.66 25.25 26.42 27.17 27.72 28.17
40
29.01 31.00 32.41 33.58 34.60 28.72 29.97 30.76 31.34 31.82
46
34.32 36.53 38.11 39.40 40.54 33.99 35.35 36.20 36.83 37.33
48
36.11 38.39 40.02 41.36 42.54 35.77 37.16 38.02 38.67 39.19
56
43.31 45.87 47.70 49.21 50.54 42.93 44.44 45.38 46.08 46.64
60
46.95 49.65 51.57 53.16 54.57 46.54 48.11 49.09 49.81 50.38
64
50.60 53.43 55.45 57.12 58.60 50.18 51.79 52.80 53.55 54.14
69
55.19 58.18 60.31 62.09 63.65 54.75 56.43 57.48 58.25 58.86
72
57.96 61.03 63.24 65.08 66.69 57.50 59.22 60.29 61.07 61.70
80
65.36 68.69 71.08 73.06 74.82 64.88 66.69 67.81 68.64 69.30
84
69.08 72.53 75.00 77.07 78.89 68.59 70.44 71.59 72.44 73.11
88
72.81 76.38 78.94 81.08 82.97 72.30 74.20 75.38 76.24 76.93
90
74.68 78.31 80.92 83.09 85.01 74.17 76.09 77.27 78.14 78.84
92
76.56 80.23 82.89 85.10 87.06 76.03 77.97 79.17 80.05 80.75
96
80.31 84.10 86.84 89.12 91.15 79.77 81.75 82.97 83.87 84.58
100
84.07 87.97 90.79 93.15 95.24 83.52 85.54 86.78 87.70 88.42
104
87.83 91.85 94.75 97.18 99.34 87.28 89.33 90.60 91.53 92.27
108
91.60 95.74 98.72 101.22 103.44 91.04 93.13 94.42 95.37 96.12
112
95.39 99.62 102.69 105.26 107.55 94.81 96.94 98.25 99.21 99.97
115
98.22 102.54 105.68 108.29 110.63 97.65 99.80 101.12 102.09 102.86
120
102.96 107.42 110.65 113.35 115.77 102.37 104.57 105.92 106.91 107.69