It appears that there is no method of communicating over interplanetary distances for small ships in Eclipse Phase. A large radio has a range of 5000 km in open space (page 298), a laser or microwave link a range of 500 km (p. 314). Neutrino communicators require a potent energy source and thus are fitted only on large spacecraft (p. 314 again). Last communication method described is a QE communicator, which is quite expensive for regular mesh-browsing activities.
Nowadays, we have Deep Space Network that allows us to receive interplanetary communications. It requires a large amount of distributed sensors, and probably relies on low data load overall. Future tech can probably compensate for increased demand... maybe?
Should it be assumed that ranges given for radio rely on single receiver, and can be effectively ignored when dealing with interplanetary mesh, thus allowing a spaceship to communicate (via relays if necessary) with mesh using radio waves?
Are there other means of communication not covered by the book (which is not that focused on owning a spaceship) but plausible given the portrayed technology level? For instance, modern-day laser communication seems more than capable of handling the distances of our Solar system - but how affordable are they?
Fundamentally, the question comes down to the following: can a spaceship flying between planets communicate with their mesh without using the expensive QE comms or demanding neutrino broadcasts, or is it effectively on its own until it gets into orbit?