Star Trek Voyager RPG d20 System

Starship Systems Descriptions
This section entails a brief description of the different combat and non-combat systems found on
a Starship and the basics of how they operate.
Starship Support Systems
Subspace Communications
By transmitting information through subspace rather than normal space, subspace communications
permit the sending of data and messages across interstellar distances faster than the speed of light,
proving it much more practical than conventional radio.
Because messages sent over subspace travel so much faster than the speed of light, they are the
basis for interstellar communication. Starships rarely even monitor frequencies that travel at the
speed of light or slower. Subspace communications have a varying degree of band frequencies, from
upper (or high-band) to lower.
Earth developed subspace communication in 2138. Subspace amplifiers are required in order to
maintain real-time contact between Earth and Earth Starfleet vessels over long distances. Contact
with these amplifiers is maintained with a subspace antenna. If this antenna is damaged, a starship is
only capable of short-range communication.
Subspace Communications Range (in light years)
Short Range: 2 Light Year
Mid-Range: 15 Light Years
Long-Range: 40 Light Years
* For unlimited range there must be a subspace amplifier every 40 light years
http://en.memory-alpha.org/wiki/Subspace_communication
System Energy Cost Range Price TL Repair DC
Communications - Short Range 1 2 LY 21,000 9 15
Communications - Medium Range 2 15 LY 71,000 10 17
Communications - Long Range 3 40 LY 104,000 11 20
So even short range subspace comms fits easily within any solar system.