Panasonic 1200N - Manual (Page 147)

Troubleshooting Error Detection
Centillion 1200N ATM Switch User Manual 11-3
NTP 297-8103-903
ALARM LED
The ALARM LED lights red when an error occurs in the equipment.
The ALARM lamp flashes if an error occurs when the equipment is being
booted. In this case, the cause of the fault may be determined by the number of
times the lamp flashes.
RCV, INS (LEDs on line cards)
Available for each line, these lamps indicate the status of that particular line.
Flash Count Error
1 ROM check sum
2 SKM G/A register check
3 Super I/O register check
4 DRAM memory check
5 Serial register check
6 Serial loopback
RCV (red) INS (green) Status
Off Lighted Line status normal
Lighted Off Line error (reception error)
Off Flashing Line error (transmission error)
Off Off Hardware error