A station router will typically have several hundred inputs and outputs. You can route
any single input, to any single, or multiple collection of destinations.
Typically the router will be made up from a series of 16, 24, or 32 input and output cards
For instance a 512 x 512 router might have Qty 16 32-input cards, and 16 output cards.
If a card should fail, you lose (in this example) a bunch of 32 inputs or outputs. So, you spread important sources and destinations across several cards.
It doesn't give 100% resilience, unless you also have redundant crosspoint and CPU cards (Crosspoint cards do the actual routing, and the CPU is the router's brain)
(Other router manufacturers are also available)
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