Cisco is pleased to announce the availability of DC power supplies for the Cisco Catalyst 4900M Switch. The 1000-watt (W) DC power supply is ideal for customers with a DC power environment. The Cisco Catalyst 4900M supports dual internal power supplies. The addition of the DC power supply broadens the capability of the Cisco Catalyst 4900M to be deployed in an environment that requires a dual DC power supply or AC-to-DC failover for resiliency.