Calculations 375MG 1000B Core and MG 1000B Expander requirementsTable 41 "MG 1000B Core and MG 1000B Expander card type, number anddevices" (page 375) shows the number of cards required and the deviceson those cards.Table 41MG 1000B Core and MG 1000B Expander card type, number and devicesCard type Number of cards Devices on cardsMC 1 32 DSP channelsXALC 3 36 Analog (500/2500-type)telephonesOne MG 1000B Core has four slots available, and an MG 1000B Expanderis required for additional cards.Requirement: one MG 1000B CoreAn Analog Line card or Digital Line card has 16 ports. If 36 digitaltelephones are used instead of 36 analog (500/2500-type) telephones, theresulting calculation would yield the same number of cards: three XDLCcards, taking the place of three XALCs. The total number of card slots andMG 1000B Core requirements are the same.Procedure 48Calculating Call Server LoadingStep ActionOnly the CCS from one terminating end of a connection is used in theCall Server loading calculation. For example, a call from one IP Phone toanother includes the CCS from both telephones. The Call Server loadingcalculation divides the CCS by two.1 Calculate the IP Phone to IP Phone calls:IT to IT CCS x 100 seconds ÷ average hold time ÷ 2 = IT to IT calls360 x 100 ÷ 120 ÷ 2 = 150 callsDividing by 2 is only required for IT-to-IT traffic. Intra-IT CCS isdouble counted in relation to the number of calls. For example, onecall lasting 100 seconds appears as one CCS on the originatingtelephone, one call on the CPU, and one CCS on the terminatingtelephone. Two CCS on telephones must be divided by two to getthe correct number of calls.2 Calculate the IP Phone to main office resources (MOR) calls:IT to IT CCS x 100 seconds ÷ average hold time = IT to MOR callsNortel Communication Server 1000Branch Office Installation and CommissioningNN43001-314 01.02 StandardRelease 5.0 20 June 2007Copyright © 2007, Nortel Networks.
