Which solution is needed to enable presence and extension mobility to branch office phones during a WAN failure?

Which solution is needed to enable presence and extension mobility to branch office phones during a WAN failure?
A . SRST with MGCP fallback
B . SRST without MGCP fallback
C . Cisco Unified Communications Manager Express in SRST mode
D . SRST with VoIP dial peers to Cisco Unified Communications Manager Express

View Answer

Answer: C