OTM nr.m consists of a maximum of "n" optical multiplexing channels and does not support non-channel-associated overheads. The letter "r" indicates function reduction.

• A.TRUE
• B.FALSE

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An unprotected chain consists of four NEs: NE1, NE2, NE3, and NE4. An end-to-end VC4 trail NE1-NE4 is created, and NE5 is added between NE2 and NE3 for capacity expansion. The original configuration remains unchanged, and no service is configured on NE5. In this case, the unprotected chain becomes NE1-NE2-NE5-NE3-NE4, and how many VC4 trails can be searched out?

• A.1
• B.0
• C.3
• D.2

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Which of the following service levels cannot be selected during service configuration?

• A.VC8
• B.VC12
• C.VC4
• D.VC3

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The STAT indicator of an SDH board is blinking red, on for 100 ms and off for 100 ms. Which of the following is the meaning of the indicator status?

• A.Normal operating
• B.No power supply input
• C.Hardware mismatch
• D.Hardware fault

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Only one TCM can be used at a site.

• A.TRUE
• B.FALSE

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