SYSTEM OPERATIONS

12.1.3 Manual System Changeover of CPU

To change over the CPU system, the CMOD command is normally used. However, if the command cannot be used for some reason, use the key operations listed below:

Note: For system changeover via the command, see Chapter 8.

WARNING

Improper key operations may result in a system down. Operate the related keys, applying extreme care.

STEP 1 Determine which CPU is active.

(1) Check the lamp indications. Refer to Figure 6-43and Table 6-8.

DSP (Front View)

MBR CPUOPE WDT IMG0

IMG1 IMG2 IMG3

STATUS

1

2

3

4

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

1

2

3

4

5

6

7

8

 

 

OFF

 

 

 

 

 

 

2

4

6

 

 

 

 

 

 

0

 

 

E

C

A

 

 

1

2

3

4

5

6

7

8

OFF

 

 

 

 

 

 

 

MBR CPUOPE WDT IMG0

IMG1 IMG2 IMG3

STATUS

1

2

3

4

 

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

1

2

3

4

5

6

7

8

 

 

OFF

 

 

 

 

 

 

2

4

6

 

 

 

 

 

 

0

 

 

E

C

A

 

 

1

2

3

4

5

6

7

8

OFF

 

 

 

 

 

 

 

Active

ST-BY

Legend

 

 

: Lamp is ON

: Lamp is Flashing

: Lamp is OFF

Figure 6-43 CPU in ACT/STBY Mode

The CPU changeover also affects the ACT/STBY of GT in the TSWM. Refer to Figure 6-44for more information, also check the lamp indications on the GT (PH-GT09) card.

green

GT (PH-GT09)

OPE/MB

MB

MBR

OPE/MB

MB

MBR

GT: Active

FRONT VIEW

GT: ST-BY

Legend

 

: Lamp is ON

: Lamp is OFF

Figure 6-44 GT in ACT/STBY Mode

 

NDA-24300

CHAPTER 6

 

Page 463

 

Issue 1

Page 490
Image 490
NEC NDA-24300 manual Manual System Changeover of CPU, DSP Front View