NEC DS2000 CPU Card
Product Description
The CPU PCB is the system’s control center. It provides the system’s central processing,
stored program, and memory for the customer’s site-specific data. Every
system requires a CPU PCB. In addition, it also provides:
PC Card interface
Conference circuits, DTMF receivers and DTMF generators
External music input
External Paging output
External relay
Real Time Clock
Battery for short term (14 day) backup of the customer’s site-specific data
Diagnostic and status LEDs
When connecting a music source, an External Paging system, or a device controlled by the
CPU relay, make sure the connected device is compatible with the CPU input and output specifications.
Review your system’s Hardware Manual for more.