Netgear XM128 ISDN 사용자 설명서
Troubleshooting
10-1
Chapter 10
Troubleshooting
This chapter provides quick easy-reference troubleshooting tables for the Model XM128 ISDN
Digital Modem. For troubleshooting purposes, the Model XM128 modem performs its own
diagnostic tests, which can provide information about each of its functions.
Digital Modem. For troubleshooting purposes, the Model XM128 modem performs its own
diagnostic tests, which can provide information about each of its functions.
The Model XM128 modem provides several diagnostic capabilities:
•
Power-on self-test
•
Local digital loopback tests
•
Diagnostic command
•
Modem reset
Power-on Self-test
At each power-up sequence or upon a reset command from the panel, the Model XM128 modem
tests the ROM code checksum, system RAM memory, EEPROM, digital and analog circuit
calibrations, and analog circuit calibrations.
tests the ROM code checksum, system RAM memory, EEPROM, digital and analog circuit
calibrations, and analog circuit calibrations.
summarizes the power-on self-test of the Model XM128 modem.
Table 10-1.
Power-on self-test
Test Sequence
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