[Al Skierkiewicz]

David,
Israel and the US share the same frequency allocation in this band through an agreement with ITU according to ITU docs. The 902-928 MHz band is for a variety of services including amateur experimental communications. It is a common problem in cell phones for there to be localized out of band radiation. So it is possible that a cell phone next to a radio modem could have over driven the modem circuitry and caused it to lose handshake. Drivers in both the US and Israel should not turn on their phones when they are driving for this reason. Other services can and have interfered with radio modems. Remember that although harmonic radiation (multiples of the main carrier of a radio service) is generally specified to be 40dB or greater below the emission on frequency, 40dB below 100kW is still a lot of power (about 10 watts).