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Train networks often use a linear topology for their backbone switches
and this makes a lot of sense when you're building a onboard train network
because you've got one train car, two train cars, three train cars, so and so on
down the line.
But there's actually also a potential problem with this topology.
What happens if one of your Ethernet switches in the backbone were to go offline?
In a linear topology, that would cut off communications
from all the switches further down that line.
Moxa's ToughNet switches have relay bypass technology to prevent this very problem.
With relay bypass technology, even if one switch in your linear topology were to go offline
It will still continue to pass through data further down the chain.
This means that one switch failure wont take out a whole chunk of your network.
Let's take a look and do a quick demo of relay bypass technology in action.
What we've done here is set up a really basic representation of an onboard train
network. We've got train car one, train car two and train car three.
And in the driver's cabin there's a live video feed
from train cars two and three.
Now would happen if I were to disconnect power from train car two?
If I did not have relay bypass technology, train car three would also get cut off.
But because this switch does have relay bypass you'll continue to pass through data
from train car three, and the live video feed from train car three will still
appear in the driver's cabin.
Relay bypass technology is very useful for onboard train networks.
Without relay bypass technology, a small problem can quickly become a big problem.
With relay bypass technology, your entire network becomes more
resilient, more reliable and more dependable.
Thanks for watching.