Hi, I am beginner in communications across ISS, and I dont know if actually is possible to use the repeaters on board on only communications with the people inside the ISS.

Best regards and I apologize for my bad english,

73 Gerardo EA4DR

Using the International Space Station’s Cupola Robotic Work Station, Expedition 26 Flight Engineers Cady Coleman and Paolo Nespoli manipulated the station's Canadarm2 to move the Kounotori2 H-II Transfer Vehicle (HTV-2) from the space-facing side of the Harmony module back to the Earth-facing port of Harmony. The move began at 7 a.m. EST Thursday.

Space shuttle Endeavour's move from the Vehicle Assembly Building to Launch Pad 39A is planned for today 10th march at 8 p.m. EST. Managers will continue to monitor weather conditions throughout the day at NASA's Kennedy Space Center in Florida. The rollout was postponed Wednesday because of a storm front moving over the area. The delay is not expected to interfere with Endeavour's targeted launch date of April 19 on the STS-134 mission.
Source NASA