A caller from the PSTN attempts to connect to an extension that does not exist on your company’s VoIP network.
Which of the following settings in the Call Forward and Pickup Settings section of the UCM Administration Directory Number Configuration page would direct such callers to voice mail?
A. Forward All
B. Forward Busy External
C. Forward Busy Internal
D. Forward No Answer External
E. Forward No Answer Internal
F. Forward Unregistered External
Explanation:
Of the available choices, the Forward Unregistered External setting inthe Call Forward and Pickup Settings section of the Cisco Unified Communications Manager (UCM) Administration Directory Number Configuration page would direct a caller from the public switched telephone network (PSTN) to voice mail if that caller attemptedto connect to an extension that does not exist on your company’s Voice over IP (VoIP) network. The Directory Number Configuration page enables a UCM administrator to configure several settings related to directory numbers (dns), including thefollowing: call forwarding, call pickup, call waiting, line display text, ring settings, and voice mailboxes. In contrast to the Forward Unregistered External setting, the Forward Unregistered Internal setting would forward internal callers to a specific voice mailboxif the internal caller dialed a nonexistent dn.
The Forward All setting forwards all callers, internal or external, to a specific voice mailbox. This is the same behavior as the CFwdAll softkey that appears on a Cisco IP phone. However, an administratorcan configure this behavior for a user by accessing the Directory Number Configuration page if the user for some reason does not have access to the CFwdAll softkey.
The Forward Busy External setting forwards any calls from the PSTN that arrive while the given dn is already in use. Similarly, the Forward Busy Internal setting forwards any internal calls that arrive while the given dn is already in use.
The Forward No Answer External setting forwards any calls from the PSTN that go unanswered by the user. Similarly, the Forward No Answer Internal setting forwards any internal calls that go unanswered by the user.
Reference:
Cisco: Directory Number Configuration: Directory Number Configuration Settings