ZyXEL U-336E User Manual - Page 119

Diagnostics &amp, Troubleshooting

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9 Diagnostics & Troubleshooting Diagnostics The U-336E is equipped with several diagnostic capabilities: • Power-on Self Test. • Analog Loop-back Test. • Analog Loop-back with Self-Test. • Local Digital Loop-back Test. • Remote Digital Loop-back Test. • Remote Digital Loop-back with Self-Test. The diagnostic tests listed above apply to several modes of operation: asynchronous or synchronous, error controlled or nonerror controlled, data compression enabled or disabled data mode. You can use these capabilities to verify the line condition and the modem's functioning and performance, and to locate the source of a communication problem. 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, Diagnostics & Troubleshooting 107

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Diagnostics & Troubleshooting
107
9
Diagnostics &
Troubleshooting
Diagnostics
The U-336E is equipped with several diagnostic capabilities:
•
Power-on Self Test.
•
Analog Loop-back Test.
•
Analog Loop-back with Self-Test.
•
Local Digital Loop-back Test.
•
Remote Digital Loop-back Test.
•
Remote Digital Loop-back with Self-Test.
The diagnostic tests listed above apply to several modes of
operation: asynchronous or synchronous, error controlled or non-
error controlled, data compression enabled or disabled data mode.
You can use these capabilities to verify the line condition and the
modem's functioning and performance, and to locate the source of a
communication problem.
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,