ZyXEL Communications U-336SA - Manual (Page 143)

Diagnostics & Troubleshooting 129
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
....
Self-test indicator. If no error occurs,
this message will last until the end of the
test.
1 ROM TEST FIAL.... ROM code checksum error.
2 RAM TEST FAIL.... System RAM fails.
3 LOADING
DEFAULTS.
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.
4 DSP RAM FIAL... The testing of DSP RAM fails, condition
A.
5 DSP RAM FIAL... The testing of DSP RAM fails, condition
A.
6 VO CALIBRATION
FAIL...
Analog circuit calibration error.
7 VR CALIBRATION
FAIL...
Analog circuit calibration error.
8 FR CALIBRATION
FAIL....
Analog circuit calibration error.
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