By analogy and less formally, the communication path from a mobile device to a base station, a consumer to the network backbone, a client device to a server etc
Pertaining to GSM and cellular networks, uplink is the transmission path from a mobile station to the base station (cell site)
The portion of a communications link used for the transmission of signals from an Earth terminal to a satellite or to an airborne platform. An uplink is the converse of a downlink. An uplink or downlink is distinguished from reverse link or forward link
1 To transmit a signal from an earth station to a particular communications satellite transponder The earth station capable of transmitting a signal to a satellite (See also: Dish, Downlink, TVRO)
to send a signal up to a satellite requiring a special dish and reservation of time on the satellite