Why is this happening and how is it fixed?

Refer to the exhibit.

Calls to Cisco Unity Connection are failing across Cisco Unified Border Element when callers try to select a menu prompt.

Why is this happening and how is it fixed?
A . Cisco Unified Border Element is sending the incorrect media IP address. The IP address of the loopback interface must be advertised in the SDP.
B . Cisco Unity Connection is configured on G.729 only. Cisco Unity Connection must be reconfigured to support iLBC.
C . Cisco Unified Border Element is not sending any support for DTMF. DTMF configuration must be added to the appropriate dial peer.
D . The Cisco Unity Connection Call Handler is configured for a “Release to Switch” transfer type. Transfers must be disabled for the Cisco Unity Connection Call Handler.

View Answer

Answer: C