A device for transmitting conversations and other sounds in real time across distances, now often a small portable unit also capable of running software etc.
A speech segment that possesses distinct physical or perceptual properties, considered as a physical event without regard to its place in the phonology of a language.
To call (someone) using a telephone.
A computerized interactive system for storing, processing and reproducing verbal messages left through a conventional telephone network.
An individual message on such a system.