Design Reference

Chapter 7: 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 chapter 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 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
34 Network Design Reference for Avaya VSP 4000 Series December 2014
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