Division 518: Key Telephone Systems, Video Telephone Stations, and Switching Systems - Customer Equipment. Contributed by Sam Etler.

AT&T. Division 518: Key Telephone Systems, Video Telephone Stations, and Switching Systems - Customer Equipment. Contributed by Sam Etler.

Division 518: Key Telephone Systems, Video Telephone Stations, and Switching Systems - Customer Equipment. Contributed by Sam Etler.

Identification, Installation and Maintenance. Uses a 107B SPOKESMAN loudspeaker set with a 6-, 10-, or 20-button telephone set, or CALL DIRECTOR telephone sets. [Extracted from KSSM, i6, July 1980 by Sam Etler]