语音发生器: The Audio Messenger combines the operations of a tone speech 
generator, telephone interface and feedback eliminator into one non-metallic surface-mounted or 1u rack mount enclosure. The Audio Messenger allows the user to automatically playback preprogrammed voice messages or tones via contact inputs. Additionally messages may be routinely played at certain times of the day or week via an internal real-time clock. The Audio Messenger accommodates 8 inputs and provides 8 outputs. Optionally an I/O extender card may be added for additional capabilities.

Line Extender: The Model LE200 is used in pairs to provide a transparent extension or expansion of a conventional Page/Party® or SmartSeries™ single or multi-party system. It can extend the system by linking two Page/Party® system cables located in areas separated by an appreciable distance. It can expand the system by allowing additional field devices to be connected with minimal loading to the page and party lines.