User guide

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Preface xxvii
Digital Link Technical Support
If you have a problem, prepare the following information and contact Digital Link
Technical Support:
¥ DSU/CSU conÞguration?
¥ Software revision?
¥ Hardware revision?
¥ When was the DSU/CSU conÞguration last changed? How?
¥ What connects to the DSU/CSU (routers, test equipment, etc.)?
¥ What operation was in progress when the failure occurred?
¥ What was the state of the LEDs on the front panel?
¥ Are the cables attached securely to the DSU/CSU?
¥ Are the cables shielded?
¥ What is the DSU/CSUÕs clock source?
¥ What are the DSU/CSUÕs passwords? (Please provide the passwords or reset them
before returning the DSU/CSU for repair.)
¥ What information is on the conÞguration, error statistics and event history screens
at the time of the error? Please provide a hard copy capture of the screens.
¥ What methods did you use in trying to resolve the problem?
¥ Is the problem repeatable? If so, how?
¥ Who can be contacted to discuss the problem?
Telephone: [phone]
Facsimile: [phone]
Email: [e-mail]
Internet: www.dl.com
24-Hour Service, 7 Days a Week