Avaya 8800 Planning And Engineering, Network Design page 50

Optical routing design
Figure 10: Mesh ring network configuration
As the signal passes from point A to point B (the most remote points in the mesh ring network
example), the signal loses intensity in the fiber optic cable, and in each connection between the
individual OADMs and transceivers.
The following factors determine the mesh ring link budget and the transmission distance for the
network:
• OADM insertion loss for Add port
• OADM insertion loss for Drop port
• OADM insertion loss for Through port at intermediate nodes
• Fiber attenuation of 0.25 dB/km
The maximum transmission distance is from transceiver to transceiver.
The number of OADMs that can be supported is based on loss budget calculations.
The following table shows the typical loss values used to calculate the transmission distance for the
mesh ring network example.
June 2016 Planning and Engineering — Network Design
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