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6. TROUBLESHOOTING
7.1 General Approach
When troubleshooting problems, a rational plan can save you many
hours of frustration. The following is a brief outline of standard
troubleshooting procedures.
1. Gather the facts to determine the exact nature of the problem.
2. Draw a picture of the system showing the equipment at both
the host and remote ends and the phone lines or in-house
wiring. Use this as a reference to note your observations, test
steps and test results. A picture keeps you focused and often
saves duplicate effort.
3. Record the front panel indications before changing anything.
This is an important part of fact gathering
4. If you change anything, change only one thing at a time.
5. Use the built-in test functions, especially the loopback tests.
Record your results.