THE SAS-40 ADMINISTRATOR'S TELEPHONE EXCHANGE SYSTEM,

摘要

A Soviet-designed telephone intercom system with external trunk access is described. The system permits conference calls (max. 20subscribers) through a central console. No direct circuits between extensions,by-passing the central console,are possible. Console has built-in mike and loudspeaker,plus handset for conversational privacy. External exchange (or PBX) is reached by dial. An extension 'hold'feature is provided.