Introduction and Overview
SDH is a networking protocol used mainly as a point-to-point link
protocol over fibre optic links. An SDH framer is usually implemented
in silicon (as a microchip) and lives on Layer 1 of the OSI Networking
Layers, the physical layer. Thus, a chip that implements this type of
functionality is called a PHY.
The design of the system was broken into four main modules. Each module was implemented separately, and at the end all modules were connected. Each module was tested separately with it's own test bench before it was connected with another. Below is a general overview of the system broken into separate modules. Click on a module to get more information.