Which HP solution provides local PSTN backup after WAN failures?

A.
HP Virtual Connect Manager

B.
HP Threat Management Services zI Module

C.
HP 8200 zI Management Module

D.
HP Survivable Branch Communication zI Module

Explanation:

Reference:
http://www.slideshare.net/OCSL/ocsl-hp-networking-and-the-launch-of-lync-2013
(see slide 36)