The Cisco 7576 is an independent dual router system that supports multiprotocol, multimedia routing and bridging with a wide variety of protocols and any combination of available electrical interfaces and media. The Cisco 7576 consists of two independent routers on a single split backplane within the chassis footprint of a Cisco 7513 router.Network interfaces reside on interface processors that provide a direct connection between two independent dual CyBuses in the Cisco 7576 and your external networks. The backplane of the Cisco 7576 has 13 slots and provides two routers on a single split backplane, designated router A and router B. Router A uses interface processor slots 0 through 5 and a Route Switch Processor (RSP4) in slot 6. Router B uses interface processor slots 8 through 12 and a Route Switch Processor (RSP4) in slot 7. There are bays for up to two AC-input or DC-input power supplies. The chassis will operate with one power supply. While a second power supply is not required, it allows load sharing and increased system availability.