What is the reason why this would happen?

Scenario: There are two call control systems in this item. The Cisco UCM is controlling the DX650, the Cisco Jabber for Windows Client, and the 7965 and 9971 Video IP Phones. The Cisco VCS and TMS control the Cisco Telepresence Conductor, the Cisco TelePresence MCU, and the Cisco Jabber TelePresence for Windows

DNS Server:

Device Pool:

Expressway:

ILS:

Locations:

MRA:

Speed Dial:

SIP TRUNK:

The intercluster URI call routing no longer allows calls between sites.

What is the reason why this would happen?
A . Wrong SIP domain configured.
B . User is not associated with the device.
C . IP or DNS name resolution issue.
D . No SIP route patterns for cisco.lab exist.

View Answer

Answer: C