REG NASA-LLIS-0474-1993 Lessons Learned Telephone System Failure.pdf

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1、Lessons Learned Entry: 0474Lesson Info:a71 Lesson Number: 0474a71 Lesson Date: 1993-08-11a71 Submitting Organization: LERCa71 Submitted by: G. MichalsonSubject: Telephone System Failure Description of Driving Event: A new telephone system went into a total failure condition and remained that way for

2、 10 1/2 hours. This failure resulted in the entire lab being without telephone service, external calls, internal calls and VMX service.The investigative team concluded that a switch failure caused the system breakdown. A contingency plan containing emergency procedures for a telephone system collaps

3、e was created.Lesson(s) Learned: Lack of voice communications can have serious impact on the operations of a center and its safety services.Recommendation(s): Prepare a contingency plan to standardize communications procedures for use during certain emergency situations.Evidence of Recurrence Contro

4、l Effectiveness: N/ADocuments Related to Lesson: N/AProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Mission Directorate(s): N/AAdditional Key Phrase(s): a71 Emergency Preparednessa71 FacilitiesAdditional Info: Approval Info: a71 Approval Date: 1996-11-06a71 Approval Name: Sell Jamesa71 Approval Organization: 501-4a71 Approval Phone Number: 216-433-8618Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-

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