ADCP-75-210 • Issue 1 • March 2007

1.7.2Central Processing Unit (CPU) Module

The Central Processing Unit (CPU) Module is a cPCI-based, single-board x86 computer with disk running on a Linux operating system. Each RAN chassis has one CPU module. The CPU runs a process management program that manages all RAN hardware including RF and digital equipment. The program also manages RF signal gain and monitors signal presence and quality. Figure 9 shows the CPU module faceplate. Table 5 describes the faceplate components called out in the figure.

 

 

7

 

VIDEO

 

 

 

 

CONNECTOR

 

 

 

 

 

 

 

 

 

6

ETHERNET

 

 

 

 

CONNECTOR

 

 

 

 

 

 

 

 

 

 

5

ACTICITY

UNIVERSAL

 

 

 

 

LEDs

 

 

 

 

 

SERIAL BUS 1

 

 

 

 

 

 

 

 

 

 

CONNECTOR

 

 

 

 

 

 

COM 1

2

 

 

 

 

 

CONNECTOR

 

 

 

 

 

 

 

 

 

 

 

STATUS

 

 

 

 

4

RESET

LEDs 3

 

 

 

 

BUTTON

 

 

 

 

 

 

 

 

 

 

 

 

 

21251-A

 

 

 

 

 

Figure 9. CPU Module Faceplate

 

 

CPU

Table 5. CPU Module Faceplate Components

 

 

 

 

REF #

DESIGNATION

DEVICE

 

 

FUNCTIONAL DESCRIPTION

1

USB1

USB connector

Front panel input/output for USB connectivity

2

COM 1

RJ-11C connector

Front panel interface for COM1

3

(Unmarked)

Status LEDs

 

 

LED 1 is POST (red on start-up, turns green on

 

 

 

 

 

successful completion of start-up self test); LED 2

 

 

 

 

 

& 3 are undefined; LED 4 (blinking green) indicates

 

 

 

 

 

disk or flash memory activitity

 

 

 

 

 

 

Page 13

 

 

 

 

 

 

© 2007, ADC Telecommunications, Inc.