Cisco 400-051 Exam

When DSP oversubscription occurs on a Cisco IOS router using DSP modules that are based on the C5510 chipset, what will happen when an analog phone connected to a FXS port goes off-hook?

  • A. A fast busy tone will be played.
  • B. A slow busy tone will be played.
  • C. A network busy tone will be played.
  • D. A dial tone will be played, but digits will not be processed.
  • E. No tone will be played.
Answer: Option E.

When DSP oversubscription occurs for both analog ports and digital ports, except PRI and BRI. FXO signaling and application controlled endpoints are not supported. This feature does not apply to insufficient DSP credits due to mid-call codec changes (while a call is already established).

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