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code checksum, DSP RAM memory, EEPROM, digital circuits, and
the analog circuit calibrations.
Results of the power-on self-test displayed on your terminal:
0 SYSTEM TESTING
....
1 ROM TEST FIAL....
2 RAM TEST FAIL....
3 LOADING
DEFAULTS.
4 DSP RAM FIAL...
5 DSP RAM FIAL...
6 VO CALIBRATION
FAIL...
7 VR CALIBRATION
FAIL...
8 FR CALIBRATION
FAIL....
Resetting The Modem
A reset command from the panel will restart the power-on self-test. If
an error message is displayed on the screen, turn off the modem, wait
for at least 10 seconds, and then turn the power on again. If the error
condition persists, call the ZyXEL Service Center for assistance, or
follow the return procedure to return the modem to ZyXEL. If the
normal IDLE SCREEN shows up, the original failure was due to a
Self-test indicator. If no error occurs,
this message will last until the end of the
test.
ROM code checksum error.
System RAM fails.
EEPROM checksum error. The factory
default settings will be downloaded to
the EEPROM and the self-test will be
re-initiated. This is not a real error.
The testing of DSP RAM fails, condition
A.
The testing of DSP RAM fails, condition
A.
Analog circuit calibration error.
Analog circuit calibration error.
Analog circuit calibration error.
Diagnostics & Troubleshooting 129
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Troubleshooting
