Network Router User Manual

116 Diagnostics & Troubleshooting
10 Diagnostics & Troubleshooting
Diagnostics
The U-336R/RE 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
∗ Line Condition Status Display
∗ Re-Transmission Indicator
∗ Throughput Display
∗ Link Status Report
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.