Cisco 4011930 network equipment spare part Power supply unit (PSU)

The Cisco GS7000 Node’s reverse path is equally flexible. Reverse traffic can be segmented or combined and routed to a maximum of four distributed feedback (DFB), coarse wavelength-division multiplexing (CWDM), or dense wavelength-division multiplexing (DWDM) reverse optical transmitters, or to the Cisco GS7000 Enhanced Digital Reverse (EDR) optical transmitters as part of the EDR system. Reverse path optical redundancy is supported using optional redundant optical transmitters. The type of reverse path segmentation and/or redundancy is determined by the type of Cisco GS7000 Reverse Configuration Module installed. A Reverse Input Port is also provided for high-frequency (5-210 MHz) reverse signal injection.