General Troubleshooting Guidelines - Paradyne Jetstream CPX-1000 Installation And Operation Manual

4. Troubleshooting
General
Troubleshooting
Guidelines
4-2
Use the following list as general guidelines:
Work from the general specific—start with simple
things first —check the power source, check for loose cables,
and ensure CPX components are properly seated.
Make no assumptions—but, check what is logical to
check.
Approach the problem systematically—Whether you
suspect a hardware or a software problem, make only one
change at a time. If that does not resolve the problem, put
the item or setting back the way it was and proceed to the
next step or component.
Document everything—keep notes about the problem
and the various steps to resolve the problem. Document
your suspicions about the cause of the problem. Develop a
troubleshooting action plan.
Identify the symptoms—get as much information as you
can:
— What changes to operation or performance occurred?
— Check equipment for red fault lights.
— Check appropriate error files/logs for clues.
— Check for error messages (see
Console).
Identify possible causes—problems often occur as a
result of system changes.
— Was software installed, removed, or upgraded?
— Did a power surge or outage occur?
— Was equipment moved; were components added,
swapped or removed?
— Were changes made to the facility that could have an
effect on the problem?
— Were changes made to network configuration (at the
IAD, DSLAM, Packet Switch, or Class 5 switch)?
— Is the problem reproducible?
— Is this the first time the problem has occurred?
— Is there a pattern? Does the problem occur at a specific
time of day or after a certain action such as system
backups?
— Is the problem with one CPX or several?
1000-A2-GN22-00
Appendix A, Using the
February 2003