Which cloud connectors provide additional reliability through redundant, localized call processing at the customer site during network outages?

Which cloud connectors provide additional reliability through redundant, localized call processing
at the customer site during network outages?

A.
Cisco Cloud Storage Connector

B.
WebEx Cloud Connected Audio

C.
Cisco Unified Border Element (Cisco UBE)

D.
Cisco Unified SRST

Explanation:

Cisco Unified SRST provides additional reliability through redundant, localized call processing at
the customer site during network outages.
Reference: http://www.cisco.com/c/en/us/products/collateral/routers/3900-series-integratedservices-routers-isr/white_paper_c11-706801.html