Our tried-and-true 3-satellite communications network is coming to Minmus. Successful use of the constellation around both Kerbin and Mun have deterred engineers from implementing more complex solutions, although they certainly thought about them. The satellite will carry two dishes and one antenna. The antenna will serve for the local omni network while the dishes allow for direct comms to Mun and indirect comms to Kerbin, routed through the IP ComSats. A lofty 1,150km orbit will provide for a very stable constellation once all satellites are in place. The transfer stage contains a probe core that will allow for any remaining fuel to be used to send the stage into Minmus for impact experiments in the future.
We have our TMI burn plotted, a course that will take us to 1,200km above Minmus - this will allow us to park the transfer stage out of the way of the operational ComSat orbit while still being in easy range for contact later when we want to impact it. Although the transfer and orbital insertion burns will use up almost all the remaining fuel in the transfer stage, once the satellite is decoupled it will not need a lot of fuel to de-orbit.
