Power supply unit CP-PWR-CUBE-3=
IP Phone power transformer for the 7900 phone series. The Cisco 7900 series IP Phone power supply allows you to provide power from the power grid when an Ethernet (Power over Ethernet) connection is not available.
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Power supply unit CP-PWR-CUBE-4=
IP Phone power transformer for the 89/9900 phone series. The power supply for Cisco 8900 and 9900 IP phones allows you to provide power from the power grid in cases where it is not possible to connect via an Ethernet cable (Power over Ethernet).
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