Cisco 400-051 Exam

A user is troubleshooting an FXO line on a Cisco IOS router that remains connected even after the call ends. Which three disconnect methods can be configured to fix this problem? (Choose three)

  • A. Loop Current Feed Open Signaling Disconnect
  • B. Hookflash Duration Signaling Disconnect
  • C. CP-TONE Dual Supervisory Disconnect
  • D. Power Denial-based Supervisory Disconnect
  • E. Ground-start Signaling Disconnect
  • F. Tone-based Supervisory Disconnect
Answer: Option D. E. F.
Explanation: 

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