[jasonwatkinspdx]

Here's a live map of the constellation that also shows ground stations: https://satellitemap.space/

SpaceX has been developing sat to sat links, but in the current system a majority of traffic just goes up and down like a bent pipe. However because of the speed the sats move the system needs to know the location of all endpoints in real time. A given sat is only visible to a base station for something like 90 seconds. So it's very different from traditional GEO services, or even MEO services like Iridium et all for that matter.