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For example, if the physical router is a controller talking to a cascade of routers using a specified
protocol, you might have defined one of these, a video router, as Level 0 in the cascade, with 16 sources
and 16 destinations (16 x 16):
6. You can continue to add levels for other routers in the cascade. The screens below, for example, show
how to define a 32x32 level for a Network Electronics audio router:
It is fairly typical to have an audio and a video router connected to the same serial port. When a
crosspoint switch is sent out over the serial port, it addresses both routers, so that the audio follows the
video switch.
Step 3 – Adding logical routers
Logical routers add another layer of refinement over the control of a router. In a typical situation, a very
large router (e.g. 1024x1024) might be used to control a TV station. The station manager doesn’t want just
anyone to be able to change any source to any destination, because some of these destinations go straight