单项选择题
With R4.0， how many total DCC-R tunnel connections can each ONS 15454 support using the TCC+ card？ （）
A. 10
B. 32
C. 64
D. 84
E. 96
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相关考题
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单项选择题
WhichtimingmodeismostappropriateforanONS15454thathaslostitsBITS-1andopticalreferences？（）
A. line timing
B. loop timing
C. internal timing
D. through timing
E. external timing
