Capacity Upgrade on Demand is a flexibility option for your system that allows increased processor capacity when you want it. The feature can be ordered on a new system, or added to an installed system to ensure that you have additional processing power available if you need it. After the hardware is installed, additional processors are available anytime. When changes to the system configuration are made, Electronic Service Agent notifies the CUoD project office of the change by communicating through a modem and a dedicated phone line. You can increase your system's processing capacity in increments of two processors by entering a command on the operating system command line.This Capacity Upgrade on Demand feature code causes a processor board with six RS64 IV 600MHz processors to be installed, and four of the processors are enabled.