Cisco 300-815 - Implementing Cisco Advanced Call Control and Mobility Services (CLACCM)

When a third-party SIP Phone System is dialed inbound across a Cisco Unified Border Element, DTMF is failing. The third-party vendor accepts only out-of-band DTMF. Which configuration should be added to the outgoing dial peer to resolve this issue?

An administrator is attempting to set up redundancy to allow users to make calls even if all Cisco UCM nodes go down or are unreachable by the IP phones.

Which feature must the administrator configure to accomplish this goal?