Comdial and FXT Especificaciones Pagina 6

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1.2 Understanding The FXT System
System
components
The FXT cabinet provides universal board slots that accept digital station boards,
industry-standard telephone station boards, and loop-start, T1, and other special-purpose line
boards. In addition to the universal slots, the system has dedicated slots for the central processor
(CPU) board (or CPU card/services board—if you are expanding system), and the auxiliary
board.
The main cabinet provides a total of 7 universal slots that can support various combinations of
lines and stations; however, you can internally expand the system to 14 universal slots, or add an
expansion cabinet and increase the system capacity to 29 universal slots.
How the
system
works
The FXT provides cost-effective voice and data communications using the latest PCM-TDM
(pulse code modulated/time division multiplexing) digital switching technology. The switching
architecture provides a non-blocking switching array that gives all ports simultaneous access
through the system. Digital technology allows simultaneous voice and data transmission using
2B+D signaling (ITU-T) specification for basic access data transfer rate for ISDN on a single
twisted pair). The design is a fully modular, ISDN (integrated services digital communications
network) system with 256 usable time slots and the flexibility for upgrade and expansion as
needed. The FXT System supports the listed Comdial line of digital proprietary telephones.
1 – 2 General Description
GCA40–215 General Description
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