When users try to access the voice-mail system, they hear a fast busy tone. In which two ways does the configuration need to be modified in order to allow calls to reach Cisco Unity Express? (Choose two)

A.
The dial peer needs to be a POTS dial peer and needs to use a fully qualified E.164 number.

B.
The command dtmf-relay sip-notify needs to be added to the dial peer.

C.
The vad statement needs to be removed.

D.
The command session protocol sipv2 needs to be added to the dial peer.

E.
The codec type statement needs to be removed.

F.
The command codec transparent needs to be added to the dial peer.

Explanation:
OK. StudentGuide Volume 2 Page 3-35
Cisco Unified Communications Manager Express must be configured with a dial peer that is pointing to the Cisco Unity Express IP address. The dial peer must have certain configuration settings as follows:
– SIP version 2 must be used.
– The DTMF relay option must be set to match Cisco Unity Express.
– G.711 codec must be used.
– Voice activity detection (VAD) must be disabled.