Overview: Cisco IP Telephone Power Cube 3 48VDC local power supply Required when not Cisco in-line power over ethernet Compatible with Cisco 6921, 6941, 6961, 7902G, 7905G, 7910G, 7910G+SW, 7912G, 7931G, 7940G, 7941G, 7945G 7960G, 7962G, 7965G, 7975G and 7914 (also the earlier non-G models) Part Number: CP-PWR-CUBE-3