ACA High Availability & Redundancy

Question 1

What is the primary purpose of the AudioCodes High Availability (HA) configuration?

Accepted Answer

To ensure continuous service by providing automatic failover to a standby unit

Answer

To increase call processing capacity by load-balancing across two units

Answer

To enable geographic routing of SIP calls across multiple data centers

Answer

To synchronize configuration changes across a cluster of gateways

Question 2

In an AudioCodes 1+1 HA pair, what is the role of the 'Standby' unit?

Accepted Answer

It remains synchronized with the active unit and takes over immediately upon failure

Answer

It actively processes half of all incoming SIP calls

Answer

It handles only PSTN traffic while the active unit handles VoIP

Answer

It performs configuration backups and firmware updates

Question 3

Which dedicated connection is required between two AudioCodes units forming an HA pair?

Accepted Answer

A dedicated HA synchronization link (Ethernet cable or port)

Answer

A SIP trunk connection over port 5060

Answer

A management VLAN shared between both devices

Answer

A BGP peering session for routing table synchronization

Question 4

What is the 'Virtual IP Address' used for in an AudioCodes HA deployment?

Accepted Answer

It serves as the single shared address used by SIP peers and trunks, floating between active and standby

Answer

It is assigned to the standby unit for out-of-band management

Answer

It identifies the HA cluster to the AudioCodes EMS server

Answer

It is reserved for SNMP trap destinations in redundant configurations

Question 5

What automatically triggers an HA failover in an AudioCodes system?

Accepted Answer

Detection of a critical failure on the active unit, such as hardware fault or process crash

Answer

A scheduled maintenance window defined in the EMS calendar

Answer

Exceeding 80% CPU utilization on the active unit for more than 60 seconds

Answer

A firmware mismatch between the active and standby units

Question 6

Which AudioCodes product series is commonly deployed in 1+1 HA configurations for enterprise and carrier environments?

Accepted Answer

AudioCodes Mediant series (e.g., Mediant 2000, 3000, 9000)

Answer

AudioCodes MP-1xx analog media gateways

Answer

AudioCodes IPPhone 400HD series

Answer

AudioCodes One Voice Operations Center (OVOC) servers

Question 7

During an AudioCodes HA switchover, how is configuration consistency between the active and standby maintained?

Accepted Answer

Configuration is continuously synchronized from the active unit to the standby unit over the HA link

Answer

Administrators must manually push configuration updates to both units separately

Answer

The standby unit polls the active unit for configuration changes every 24 hours

Answer

Configuration is stored only on the EMS server and downloaded by whichever unit becomes active