单项选择题

A. signal fail， signal degrade， manual switchB. signal ……

What is the correct relative switching priority in an MS-SPRing ring （higher to lower）？（）

A. signal fail， signal degrade， manual switch
B. signal degrade， signal fail， manual switch
C. protection lockout， manual switch， path AIS
D. forced switch， manual switch， signal degrade
E. protection lockout， manual switch， forced switch

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热门试题

单项选择题WhatprotocolenablesEthernetoverSONET SDHencapsulationinteroperabilitybetweentheG-seriesandML-seriesEthernetcards？（）

A. LEX
B. HDLC
C. GFP-F
D. PPP/BCP

单项选择题You are provisioning an E-1 circuit on an ONS 15454 MS-SPRing configuration and XC-VXL-10G card. Each VC-12 connection must also terminate via the VC-3 matrix. How many VC-3 ports remain after this circuit is created， assuming no other circuits？（）

A. 92
B. 93
C. 94
D. 95
E. 96

单项选择题Whatisthedifferencebetween1+1and1：1protectionswitching？（）

A. 1+1 is based on APS， while 1：1 is based on IPS.
B. 1：1 is used in SNCP switching， while 1+1 is used in MS-SPRing switching.
C. 1+1 sends signals on Working and Protect paths， while 1：1 sends signals only on Working path.
D. 1+1 sends signals on Working path ONLY， while 1：1 sends signals on both Working and Protect paths.

单项选择题WithR4.0，howmanytotalDCC-RtunnelconnectionscaneachONS15454supportusingtheTCC+card？（）

A. 10
B. 32
C. 64
D. 84
E. 96

单项选择题WhichtimingmodeismostappropriateforanONS15454thathaslostitsBITS-1andopticalreferences？（）

A. line timing
B. loop timing
C. internal timing
D. through timing
E. external timing