Which combination of configuration elements would be necessary to implement outbound PSTN routing with a primary SIP trunk and a backup PRI gateway, where calls automatically fail over to the backup if the primary is unavailable?
Correct Answer: A route group listing the primary SIP trunk and backup PRI gateway in priority order, referenced by a route list containing that route group, matched by a route pattern for the relevant PSTN digit patterns
Explanation: A priority-ordered route group referenced by a route list matched by a route pattern implements the described failover routing, unlike changing only console banner, chassis LED color, fan speed, rack mounting position, or power supply brand.
Correct Answer: A route group listing the primary SIP trunk and backup PRI gateway in priority order, referenced by a route list containing that route group, matched by a route pattern for the relevant PSTN digit patterns
Explanation: A priority-ordered route group referenced by a route list matched by a route pattern implements the described failover routing, unlike changing only console banner, chassis LED color, fan speed, rack mounting position, or power supply brand.