Digital communication system for residential and custodial-care environments, offices and the like

摘要

#$%^&*AU2012200692A120120301.pdf#####DIGITAL COMMUNICATIONS SYSTEM FOR RESIDENTIAL AND CUSTODIAL-CARE ENVIRONMENTS, OFFICES AND THE LIKE ABSTRACT 5 A digital communications system for integration of different communications services within a single network is provided. The network is structured through a set of interconnected modules or terminals (1), (1 ),..., ( 1l"), wherein said terminals are interconnected through data transmission system comprising a read bus (2) and a write 10 bus (3) for differential transmission. Each terminal comprises at least one programmable logic device (PLD) card (7) comprising a programmable logic device for the management of a series of cards associated to said PLD card, a main card comprising at least two A/D, D/A (14, 15)audio converters; corresponding circuits and connectors (5) for the interconnection of terminals, said circuits and connectors comprised within the data is transmission system, and a user interface card (9) comprising a display (19) and a keyboard (20), a series of piezoelectric buzzers for configuration of options of the digital communications system.