ZyXEL Communications Omni TA128 - Manual (Page 116)

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15
Diagnostics
This chapter provides diagnostic tables for the TA128. The TA128
can perform its own diagnostic tests, providing you with valuable
information.
Diagnostics
The TA128 ISDN TA provides several diagnostic capabilities:
•
Power-on Self-test
•
Local Digital Loopback Test
•
Diagnostic Command
•
TA128 Reset
Power-on Self-test
At each power-up or upon a reset command from the panel, the TA
will test the ROM code checksum, system RAM memory,
EEPROM, digital circuits and analog circuit calibrations.
The following table is a summary of the TA128's self-tests:
Test
Seq. LED
LNK LED
B1 LED
B2 LED
AA Test Description
1 on* off off off Memory test
2 off on* off off ISDN chip interface test
3 off off on* off ISDN chip functional test
4 off off off on* HDLC functional test
O O NOTE
: The LED lights up while test is in progress and blinks if a test
fails.
The LNK LED will light up for half a second to indicate the success
of the TA128's power on self-test. After this, the LNK LED will
become the normal physical layer (layer 1) active indicator.