A network technician discovers there is no connectivity on a T1 line even though the cable connection appears to be in place. The router shows there is no active connection on the port. The issue is occurring between the demarcation point and the router port. The router cable tests fine and is terminated at the demarcation panel. Which of the following tools should be used to fix the issue?
A. Punchdown tool
B. Crimper
C. OTDR
D. Loopback adapter
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Why punchdown tool, shouldn’t it be loopback adapter? I don’t recall reading anywhere that says you connect the cable from the demarc to the router using a punchdown tool.