KX-NS1000UC - Panasonic PBX Service Manual (repair manual). Page 10

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• PBX System Control  and Management
• Circuit Switching (includes gain adjustment function)
• Conference Call 
• Voice  Mail
• MOH
• PAGING

• Power Supply : DC/DC Converter
• CPU : Dual ARM11core devices (650MHz) IC100
• FPGA : IC300
• Flash ROM : 8Mbyte [4Mbit x 16bit x 1]  (for boot programs) IC208
• SDRAM : 512Mbyte [128Mbit  x 8bit  x  4]  (for OS and application program area) IC101, IC102, IC104, IC105
• SRAM : 2Mbyte [1Mbit x 16bit x 1]  (for user configuration data backup) IC209
• Serial Flash ROM : 8Mbyte  (for internal MOH data) IC305
• USB 2.0 Hub Controller : IC603
• Gigabit Ethernet Switch (L2SW) : IC502

• Storage Memory Card  I/F x 1  (for OS , application programs , and Voice Mail data store) 
• USB I/F  x 1 (for UPS status monitoring)
• LAN I/F  x 3 (for maintenance and the LAN, WAN)
• MOH : External sound input x 1
• PAGING : External output x 1
• RS232C : x 1 (for system maintenance)

• Power Input : +15V_CON
• Power Output : +15V (for DSP_Card/Line_Card/FAN/MOH)

+5VD_USB (for USB_VBUS)
+5.0VD (for DC/DC+1.8V, +0.98V)
+3.3V (for IO, FAX_Card, Storage Memory)
+3.3VD_B (for SRAM/RTC backup)
+2.5VD (for CPU, L2SW)
+1.8VD_CPU (for CPU, DDR2-SDRAM)
+1.8VD_AVDD (for L2SW)
+1.2VD_LDO (for FPGA_core)
+1.0VD_CPU (for CPU_core)
+1.0VD_L2CORE (for L2SW_core)

LED Lamp (STATUS) : Turns on to indicate system operating condition.
LED Lamp (BATT ALARM) : Turns on to indicate the dropping of the lithium battery voltage (less than 2.8V).
LED Lamp (MASTER) : Turns on to indicate Master / Slave operating mode.
LED Lamp (LINK/ ACT) : Link status indication : OFF : Off-line/ON : Linked normally/Flashing : In communication
LED Lamp (1000 / 100/ 10) Data transmission speed indication : OFF : 10 Mbps/Yellow ON : 100 Mbps/Green ON: 1000 Mbps

System Initialize Switch : On default startup, set the switch to the "SYSTEM INITIALIZE" position for the power ON. Return the