Which command in the MGCP gateway configuration defines the secondary Cisco Unified Communications Manager server?

A collaboration engineer must configure Cisco Unified Border Element to support up to five concurrent outbound calls across an Ethernet Link with a bandwidth of 160 kb to the Internet Telephony service provider.
Which set of commands allows the engineer to complete the task without compromising voice quality?
A)

B)

C)

D)

Configuration of DNS is required to achieve a fully functional Cisco UCM system Cisco UCM uses DNS to resolve fully qualified domain names to IP addresses for which destinations?

Which configuration on Cisco Unified Communication Manager is required for SIP MWI to work?

Refer the exhibit.

Given this "debug isdn q921" output, what is the problem with the PRI?