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Provisioning Page 91 of 544
Option 11C and 11C Mini Technical Reference Guide
• Worksheet H: Battery current and AC line calculation for AC systems
using NTAK75 and NTAK76 on page 153
• Worksheet I: Battery current calculation for customer-provided DC
reserve power on page 154
Introduction
This chapter outlines the procedures required to determine equipment
requirements.
Provisioning a new system
The following summarizes the tasks required to provision a new system:
1 Define and forecast growth (page 91).
2 Estimate CCS per terminal (page 93).
3 Calculate number of trunks required (page 97).
4 Calculate line, trunk, and console load (page 98).
5 Calculate DTR requirements (page 99).
6 Calculate total system load (page 102).
7 Calculate number of loops required (page 102).
8 Calculate number of IPE cards required (page 103).
9 Provision Conference/TDS loops (page 108).
10 Calculate memory requirements (page 110).
11 Assign equipment and prepare equipment summary (page 110).
12 Calculate battery backup time (page 110).
Defining and forecasting growth
The first step in provisioning a new system is to forecast the number of
telephones required at two-year and five-year intervals.
The number of telephones required when the system is placed in service
(cutover) is determined by the customer. If the customer is unable to provide
a two-year and five-year growth forecast, then an estimate of annual
personnel growth in percent is used to estimate the number of telephones
required at the two-year and five-year intervals.