noun. A transmission path for the communication of signals and data from a communications satellite or other space vehicle to the earth and back.

noun. The transmission of a signal from a satellite to a receiving station on earth; or the means of this transmission.

noun. Transmission of data from a network, usually wireless, to the user.

verb. To transmit a signal from a satellite to a terrestrial receiving station.

"BraytonAK: Might be because Google Voice cannot get "downlink" I don't know the technical term in 907 to hook into the phone network."

uplink  

1-khz  1-mhz  10-khz  3-db  baseband