Exam 640-692 Question id=179 Identify Cisco Equipment and Related Hardwares

Refer to the exhibit.
What does the CD LED indicate on the voice WAN interface card?

A. An alarm condition
B. Receive signal strength
C. A carrier has been detected
D. The interface is in loopback mode


the answers are mixed, do not specify in the comment number or the letter of the answer
please write answer#A instead A, answer#B instead B...

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