Table 12 - Nortel 1000 Fundamentals

56 Planning and engineering

Table 12

Inputs
Input
TN_MO_Users
PCA_MO_Users
P_PCA_SIP
Calculations Use the following formulas to calculate traffic requirements
(MO indicates Microsoft Office Communicator):
•
•
•
•
Table 13 "Traffic figures" (page 56)
calculated based on the Poisson formula at P.01 Grade of Service.
Table 13
Traffic figures
Traffic (CCS)
5
10
15
20
25
30
35
40
45
50
55
60
65
Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007
Copyright © 2005–2008, Nortel Networks
.
Description
Total number of Office Communicator users that use the SIP Access Ports
for voice services.
Number of Office Communicator users that use Personal Call Assistant (PCA).
The PCAs required here are additional to the number of PCAs provided in the
Enterprise Configurator (EC) tool Software screen.
Percentage of PCA calls that use the soft client to answer a call.
Traffic for PCAs = (PCA_MO_Users) x (CCS per user) x (1 -
P_PCA_SIP) x 10%
Traffic for SIP ports = (TN_MO_Users - PCA_MO_Users) x (CCS per
user) + (PCA_MO_Users x P_PCA_SIP) x (CCS per user)
Total SIP Traffic = (Traffic for PCAs) + (Traffic for SIP ports)
Number of MO SIP ports = Poisson (Total SIP Traffic) at P.01 Grade of
Service
Traffic (Erlang)
0.14
0.28
0.42
0.56
0.69
0.83
0.97
1.11
1.25
1.39
1.53
1.67
1.81
Nortel Communication Server 1000
NN43001-121 01.03 Standard
Release 5.0 30 April 2008
shows traffic in CCS and number of ports
Number of ports
2
3
3
4
4
4
5
5
5
6
6
6
6