CIMM DEFINITION: The action of transmitting an analog or digital signal to a satellite dish receiver on earth via a transponder on a satellite. (Source: itvt.com/glossary)

2: Pertaining to cellular networks, the radio downlink is the transmission path from a cell site to the cell phone. Traffic and signaling flows within the base station subsystem (BSS) and network switching subsystem (NSS) may also be identified as uplink and downlink. (Source: www.wikipedia.org)

3: Pertaining to a computer networks, a downlink is a connection from data communications equipment towards data terminal equipment. This is also known as a downstream connection. (Source: www.wikipedia.org)