M15 MRAT

Question 1

What is the key server role involved in voice resiliency?

Answer 1

The Registrar, which enables client registration and authentication and provides routing services.

Question 2

If a branch site does not have a DNS server, what are the two alternative ways to enable discovery of the SBA or Survivable Branch Server?

Answer 2

• Configure DHCP option 120 on the branch site’s DHCP server to point to the fully qualified domain name (FQDN) of the Survivable Branch Server or Survivable Branch Appliance.
• Enable the Survivable Branch server or Survivable Branch Appliance to respond to DHCP 120 queries.

Question 3

If a user is registered at a primary central site, will the user still be able to establish multi-party conferences when the central site is unavailable?

Answer 3

No. The following voice features are unavailable for users registered at a primary central site when it is out of service:

• Conference Auto Attendant
• Multi-party communications hosted by the user
• Presence and DNS-based routing
• Updating call forwarding settings
• Response Group Service and Call Park
• Provisioning new phones and clients