On the Echo Expansion Bridge, for the Echo connect segments, do they come from the factory as active or do you need to activate them like you do in the room box?

Hi Randy, the EchoConnect segements don't require any form of activation. But keep in mind that they are not power supplies. You still need to have a power supply somewhere in each segment.

So each segment needs its own power supply? or just connected to a power supply?

Correct, Each segment will need its own power supply.