Nortel Networks NN43001-121 - Manual (Page 51)

General requirements 51
The number of users the OCS Proxy server with MCM can handle depends
on the usage and the number of calls per hour per user. For example,
assuming 5 cph/user for VoIP calls would give 3000 users (15 000 cph/5
cph/user = 3000 users).
The following are the formulas (based on SPECint_rate2000) to calculate
the maximum call rate for different platforms:
• VoIP calls only. Number of calls per hour supported = (15 000 x SPECint
of HW) / 29.8.
• SIP CTI (TR/87) RCC calls only. Number of calls per hour supported =
(10000 x SPECint of HW) / 29.8.
• Both VoIP and SIP CTI (TR/87) RCC calls combined. Number of calls
per hour supported = [(15 000 x SPECint of HW) x (VoIP_call%) + (10
000 x SPECint of HW) x (SIPCTI_call%)]/ 29.8.
ATTENTION
VoIP_call% or SIPCTI_call% must be less then 100%.
ATTENTION
An OCS Proxy is not an Access Proxy. For more information on OCS proxy
hardware requirements, see
Table 8 "OCS Proxy server hardware requirements"
(page 53) .
General requirements
This section provides general guidelines and requirements to follow when
you deploy the Office Communications Server 2007.
General requirements navigation
• "Server topology" (page 52)
• "Operating System Requirements" (page 52)
• "Hardware Requirements" (page 53)
• "Virtual Server 2005" (page 54)
• "Storage" (page 55)
• "Trunks" (page 55)
• "SIP access port " (page 55)
• "Basic Client Configuration" (page 58)
• "Port use" (page 58)
• "Security " (page 59)
Nortel Communication Server 1000
Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007
NN43001-121 01.03 Standard
Release 5.0 30 April 2008
Copyright © 2005–2008, Nortel Networks
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