NEC 1090010 - NEC DSX CPU Card

The CPU Card is the system’s control center. It provides the system’s Linux operating system, central processing, stored program, and memory for the customer’s site-specific data. Every system requires a CPU Card. In addition, it also provides:

• CompactFlash card interface (for IntraMail, software loading, and database backup)
• Conference circuits, DTMF receivers and DTMF generators
• Real Time Clock
• NAND Flash for storing the system database
• Battery for short term (14 day) backup of the Real Time Clock and station parameters
• Two audio inputs for Background Music and Music on Hold (1/8” mono minijacks)
• One audio output for External Paging (1/8” mono minijack)
• Ethernet and USB ports for local and remote PC Programming
• RS-232 serial port for Station Message Detail Recording
• Built-in V.32BIS 14.4K BPS modem for remote maintenance


The CPU also has a reset switch that provides the following three functions:

1. System reset (when momentarily pressed).
2. System initialization (when held down as power is turned on).
3. Software update (when held down for six seconds while software update CompactFlash card is installed).