General requirements 51The number of users the OCS Proxy server with MCM can handle dependson 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/5cph/user = 3000 users).The following are the formulas (based on SPECint_rate2000) to calculatethe maximum call rate for different platforms:• VoIP calls only. Number of calls per hour supported = (15 000 x SPECintof 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 callsper hour supported = [(15 000 x SPECint of HW) x (VoIP_call%) + (10000 x SPECint of HW) x (SIPCTI_call%)]/ 29.8.ATTENTIONVoIP_call% or SIPCTI_call% must be less then 100%.ATTENTIONAn OCS Proxy is not an Access Proxy. For more information on OCS proxyhardware requirements, see Table 8 "OCS Proxy server hardware requirements"(page 53).General requirementsThis section provides general guidelines and requirements to follow whenyou 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 1000Nortel Converged Office Fundamentals — Microsoft Office Communications Server 2007NN43001-121 01.03 StandardRelease 5.0 30 April 2008Copyright © 2005–2008, Nortel Networks.
