When adding the CP-7914 expansion module, a replacement footstand and an additional power supply are required. If one CP-7914 is being added, a CP-SINGLFOOTSTAND and a single power supply (CP-PWR-CUBE) is needed. If two CP-7914's are being added, a CP-DOUBLFOOTSTAND and 1 power supply are needed. The only tool required for installation of the Cisco 7914 is a flat blade screwdriver or other appropriate tool to unlatch the pins securing the standard footstand. Additional power supply (CP-PWR-CUBE) is required (see below) !