You support a customer whose network environment includes Microsoft Lync Server 2013 with Enterprise Voice. Your customer enables centralized logging on the Lync servers.
According to your customer, a user has reported that when she attempts to dial out to a public switched telephone network (PSTN) number, she receives the following message: “Your organization does not support calling this number.”
You confirm that the user is configured to use Enterprise voice and that other users are successfully making and receiving calls.
Within the captured logs from the affected user, you view the following message: “SIP/2.0 403 Forbidden.”
The Microsoft Lync 2013 control panel displays the following information:
You need to ensure that the user is able to dial out to PSTN.
What should you do?
A. Change the associated normalization rule in the dial plan policy to match: ^(d(11))$, Translation pattern +$1.
B. Change the voice policy for this user to < North America > for PSTN usage association.
C. Contact the Session Initiation Protocol (SIP) provider.
D. Open port TCP/5061 inbound on the Mediation Server.