A keyset is a proprietary desk phone designed to work with a specific private branch exchange or key telephone system. Unlike a standard single-line analog phone, it features dedicated buttons for multiple incoming lines, intercom paging, and call transfers. The intelligence resides in the central control unit rather than the phone itself.
Heard on the job
The receptionist needs a new 24-button keyset because the line indicators on her old one stopped lighting up.
Also heard as
- key telephone
- multiline phone