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Free 920­505 Exam Preparation  Questions  Exam  920­505    : Optical Metro 3500 Operations and Maintenance

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Question:1 A technician is fibering a Band 1 Optical Multiplexer (OMX) module. How is the "Channel 1 Add port" used to allow Band 1 Channel 1 traffic signals to be added and dropped at a site? A. This port is connected to the Band 1 OMX module OTS out port. B. This port is connected to the Band 1 Channel 1 drop port of the Band 1 OMX module. C. This port is connected to the receive port of a Band 1 Channel 1 OC-48 optical circuit pack. D. This port is connected to the transmit port of a Band 1 Channel 1 OC-48 optical circuit pack. Answer: D Question:2 What is the highest quality timing source to use at the head-end of an Optical Metro 3500 network? A. SMC quality line source B. ST1 quality BITS source C. ST2 quality BITS source D. Internal timing from VTX-48 Answer: B Question:3 A technician has an Network Element (NE) that is synchronized to a BITS source and has raised a Loss of Pri Timing Reference alarm, which is followed by a Loss of Sec Timing Reference alarm. Which action is recommended to clear the alarm? A. Verify the timing source. B. Reseat both VTX-13 and VTX-14. C. Deprovision the BITSIN-A source. D. Retrieve the Synchronization Status Messaging (SSM) values from the adjacent N. Answer: A Question:4 A technician has a three-node UPSR. Which scenario could lead to a timing loop in the event of a fiber cut? A. All three Network Elements (NEs) are set to internal timing. B. One Network Element (NE) is set to external timing and the other two have synchronization-status messaging overriding the quality level to ST1. C. One Network Element (NE) is set to external timing and the other two have synchronization-status messaging overriding the quality level to SMC. D. All three Network Elements (NEs) are set to line timing and the other two have synchronization-status messaging overriding the quality level to ST1. Answer: D Question:5 A customer is experiencing constant frame errors with DS3 connections through an Optical Metro 3500 shelf. There are no alarms present in the alarms window. In Site Manager, how can the information on this error count be found? A. Select Error Log under the Faults sub-menu and filter for DS3 errors. B. Select Active Alarms under the Faults sub-menu and filter for DS3 alarms. C. Select Facility Poll under the Performance sub-menu and select the appropriate DS3 ports. D. Select Facility PM Counts under the Performance sub-menu and select the appropriate DS3 ports. Answer: D

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Exam 920-505 preparation questions