NEC NDA-24300 manual CPU Changeover via MBR Key

SYSTEM OPERATIONS

WARNING

(2)Check the mate CPU’s STBY mode. Also check the mate GT’s STBY mode. Refer to Fig- ure 6-43and Figure 6-44.

The system changeover of CPU can be done only when the mate CPU is in STBY mode. Do not attempt the changeover if the mate CPU is closed.

STEP 2 Flip the MBR key on the DSP of the active CPU. Refer to Figure 6-45.

After the above steps, set the MBR key as shown below. The system changeover starts automatically.

1 2

1	2	3	4
OFF

1 2 3 4 5 6 7 8

OFF

1 2 3 4 5 6 7 8

OFF

STATUS

6

E

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

DSP (Active)

Figure 6-45 CPU Changeover via MBR Key

Note: If the MBR key remains in the UP position, the CPU stays in its make-busy status. Be sure to return the key to the DOWN position except in the case of a special purpose.

STEP 3 Confirm the changed lamp indications.

To confirm the CPU changeover, check the lamps in Figure 6-46on both DSPs. LED indica- tions must change as shown when the CPU system has been correctly changed over.

		CPU Formerly Active		After Changeover
	CPU OPE		: Steady-ON (green)		OFF
	IMG0		: Flash (green)		Flash (green)
	IMG1-3		: Flash (green)		OFF
	MB/OPE (GT Card) : Steady-ON (green)				OFF
CPU Formerly in STBY Mode				After Changeover
	CPU OPE		: OFF		Steady-ON (green)
	IMG0		: Flash (green)		Steady-ON (green)
	IMG1-3		: OFF		Flash (green)
	MB/OPE (GT Card) : OFF				Steady-ON (green)

Figure 6-46 LED Indications Before and After CPU Changeover

STEP 4 Analyze the displayed system messages.

After STEPs 1 through 3 are performed, the system messages [7-C] and [7-D] automatically display. Confirm that no errors occurred during the CPU changeover process.

Note: When the CPU mode change executes, the MAT (TCP/IP) is once disconnected. Then, log in to the sys- tem again.

CHAPTER 6 NDA-24300

Page 464

Issue 1