What is the cause of this problem?

An administrator executes the debug isdn q931 command while debugging a failed call. After a test call is placed, the logs return a disconnect cause code of 1.

What is the cause of this problem?
A . The media resource is unavailable.
B . The destination number rejects the call.
C . The destination number is busy.
D . The dialed number is not assigned to an endpoint.

View Answer

Answer: D