Design Reference

Chapter 5: Optical routing design
The Avaya optical routing system uses coarse wavelength division multiplexing (CWDM) in a grid of eight
optical wavelengths. Use the Avaya optical routing system to maximize bandwidth on a single optical fiber.
This section provides optical routing system information that you can use to help design your network.
Optical routing system components
Small form factor pluggable (SFP) transceivers transmit optical signals from Gigabit Ethernet
(GbE) ports to multiplexers in a passive optical shelf.
Multiplexers combine multiple wavelengths traveling on different fibers onto a single fiber. At
the receiver end of the link, demultiplexers separate the wavelengths and route them to
different fibers, which terminate at separate CWDM devices. The following figure shows
multiplexer and demultiplexer operations.
Important:
For clarity, the following figure shows a single fiber link with signals traveling in one direction
only. A duplex connection requires communication in the reverse direction as well.
Figure 5: Wavelength division multiplexing
The Avaya optical routing system supports both ring and point-to-point configurations. The
optical routing system includes the following parts:
• CWDM SFPs
• Optical add/drop multiplexers (OADM)
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