High availability provides load balancing, scalability, and redundancy features to ensure uninterrupted service.
You can install two Vocera Platform nodes at a single facility, one as a master node and the other as the standby node To enable telephony high availability, you can configure each node to run an instance of the telephony gateway. If additional telephony gateways are needed for increased capacity or to manage traffic at remote facilities, additional telephony gateway virtual machines can be provisioned.
Telephony high availability supports the following features:
Redundancy — If one of the telephony gateway nodes stop responding, the Voice Service automatically redirects outbound calls to another available telephony gateway node for uninterrupted service.
Scalability — You can purchase and install as many telephony gateway services as you need to increase telephony capacity.
Load balancing — For outbound calls, the Voice Service automatically allocates calls to the least busy telephony gateway. The PBX equipment handles inbound load balancing.
Generally, all telephony gateway services at a facility use the same PBX. However, they could use different PBXs as long as all PBXs have the same configuration for the trunks to the telephony gateway services and the same capabilities for off-PBX dialing (for example, tie lines).