Network Router User Manual

Diagnostics & Troubleshooting 117
OONOTE: * ITEMS APPLICABLE EXCLUSIVELY TO U-336R INSTALLED IN RS-1612 RACK
SYSTEM.
Power-On Self Test
At each power-up or upon a reset command from the panel, the
modem will test the ROM code checksum, system RAM memory,
DSP code checksum, DSP RAM memory, EEPROM, digital
circuits, and the analog circuit calibrations.
If successful, the TST LED will be on during, and off after the test.
If the test fails the SQ LED will flash. The number of flashes will
indicate the error as specified by the table below:
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
The factory default settings will be
downloaded to the RAM 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.