We were right. And it cost less than a call to Columbia. Last but not least, we checked Radio Salzburg. We just called them and found out it was all correct. However, they sounded worried about the fact their signal was going over satellites.
Every transmitter produces some harmonic distortions.
A satellite doesn't need that much power to uplink to, but we didn't know how much a FleetSatcorn needs. We found out one day later. The manual mentioned something about boosters to increase the operation range of the telephone. Those amplifiers will, however, produce loads of unwanted frequencies - an output like that looks like a Christmas tree on a frequency analyser. We divided the 945MHz by 3 and ended up with the uplink frequency range of the FleetComsat, UFO or NATO satellites.