C Pm C-Level Infinite Loop (Temporary); Repair Procedure; D Pm Lockup Failure (Permanent); Figure 7-5 3-C Pm C-Level Infinite Loop (Temporary) - NEC NEAX 2400 IPX Manual

3. 3-C PM C-level Infinite Loop (Temporary)

This message is displayed when the C-level program has been detected as abnormal by the Port
Microprocessor (PM) mounted on the FCH (PA-FCHA) card. In this instance, the system performs an
appropriate restart (B-monitor/Initial restart) according to the frequency of the failures. Refer to
Figure 7-5. If the frequency exceeds 15 times an hour, it is judged as permanent. See
Infinite Loop (Permanent)".
1. xx0x 0000 0000 0000
MG
U
FCH Mounting Location
B-monitor Restart: Ports whose link has already been established remain connected, while ports processing
Note:
a call-origination may be released.
Initial Restart: All ports on the circuit card are force released to be placed in idle state.

3.1 Repair Procedure

STEP 1: If the 3-C message has been displayed only once or twice, monitor the failure for a while. Otherwise,
move to STEP 2.
STEP 2: Initialize the indicated FCH (PA-FCHA) card using the MB key. See
the FCH (PA-FCHA) card."
When the LED on the FCH card lights green, and the related system messages are not displayed,
monitor the system for a while. Otherwise move to STEP 3.
STEP 3: Replace the FCH card, following the procedure listed in
FCHA) card."

4. 3-D PM Lockup Failure (Permanent)

The CPU sends diagnosis data at periodic intervals to the Port Microprocessor (PM) on FCH (PA-FCHA) cards
to monitor the PM. If the CPU cannot receive the return data within a predetermined time, the system displays
the data in Figure 7-6. When the failure is detected more than 15 times per hour, the failure is judged as
permanent. Otherwise, 3-E PM Lockup Failure (Temporary) is displayed.
1. xx00 0000 0000 0000
FCH Mounting Location
MG
2. 0000 0000 0000 0000.........
PM Restart Type
G

Figure 7-5 3-C PM C-level Infinite Loop (Temporary)

2. 0000 0000 0000 0000.........
U G

Figure 7-6 3-D PM Lockup Failure (Permanent)

3-C PM C-level Infinite Loop (Temporary)
Figure 7-4
NDA-24299
TROUBLESHOOTING
"3-B PM C-level
PM Restart Type
0/1 = B-monitor / Initial Restart
FCH Mounting Location
MG: Module Group (0/1)
U: Unit (0-3)
G: Group (00-23)
Figure 7-3 "How to Initialize
"How to Replace FCH (PA-
FCH Mounting Location
MG: Module Group
U: Unit (0-3)
G: Group (00-23)
Note
CHAPTER 7
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