How is this issue resolved?

An administrator is integrating a Cisco Unity Express module to a Cisco UCME system. A test call is placed to the Cisco Unity Express pilot number, but the administrator receives a busy signal.

The dial-peer is configured as follows:

dial-peer voice 4100 voip

destination-pattern 41..

session protocol sipv2

session target ipv4:10.1.10.1

dtmf-relay sip-notify

no vad

How is this issue resolved?
A . The dial-peer needs to be reconfigured to support the
B . 711 voice codec.
C . The dial-peer needs to be reconfigured to support vad.
D . The dial-peer needs to be reconfigured to support
E . 323 instead of SI
G . The destination pattern needs to be changed to match the dialed number of 4100.