ZyXEL U-336R User Guide - Page 142

Diagnostics &amp, Troubleshooting

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10 Diagnostics & Troubleshooting Diagnostics The U-336S/SA 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, DSP 128 Diagnostics & Troubleshooting

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128
Diagnostics & Troubleshooting
10
Diagnostics &
Troubleshooting
Diagnostics
The U-336S/SA 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, DSP