the telegraphic or telephonic communication of audio, video, or digital information over a distance by means of radio waves, optical signals, etc, or along a transmission line
telecommunication in American English
(ˌtɛləkəˌmjunɪˈkeɪʃən)
noun
[also pl., with sing. or pl. v.]
communication by electronic or electric means, as through radio, telephone, telegraph, television, or computers