Cisco GS7000 Installation And Operation Manual page 230

Appendix C
Expanded Fiber Tray
illustration.
Service Group 1
Service Group 1
Service Group 2
Service Group 2
Service Group 3
Service Group 3
Service Group 4
Service Group 4
Multi-Wave O-Band Demultiplexer Configuration Example
As the demand for bandwidth continues to grow and clusters of homes decrease into
smaller serving areas, networks can become capacity constrained or ''fiber starved.''
A cost-effective approach to solving this problem uses multiple wavelengths on a
single fiber.
The Prisma II™ Multi-Wavelength (O-Band) system solution enables dramatic
bandwidth increase over a single optical fiber. This system uses forward transmitters
capable of co-propagating multiple wavelengths in the 1320 nm to 1335 nm window
down a single fiber using wavelength division multiplexing (WDM), with each
transmitter carrying a full RF load.
The multi-wavelength solution is ideal for segmentation of node service areas
because they enable the reuse of existing fiber up to six times, over distances of up to
30 kilometers.
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Headend
WDMs
Fwd TX
Rtrn RX
Fwd TX
Rtrn RX
Fwd TX
Rtrn RX
Fwd TX
Rtrn RX
GS7000 Node
WDMs
Fwd RX
Service Group 1
Rtrn TX
Service Group 1
Fwd RX
Service Group 2
Rtrn TX
Service Group 2
Fwd RX
Service Group 3
Rtrn TX
Service Group 3
Fwd RX
Service Group 4
Rtrn TX
Service Group 4