High Availablity for Gateway Clients |
You can install multiple Vocera SIP Telephony Gateway servers — also called a telephony server array — at each site. By installing an array of telephony servers at a site, you can take advantage of the following high availability features:
Redundancy – If one of the telephony servers stops responding, the Vocera Server automatically redirects outbound calls to another available telephony server for uninterrupted service.
Scalability – You can purchase and install as many telephony servers as you need to increase telephony capacity.
Load balancing – For outbound calls, the Vocera Server automatically allocates calls to the least busy telephony server. The PBX equipment handles inbound load balancing.
Generally, all telephony servers at a site will 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 servers and the same capabilities for off-PBX dialing (for example, tie lines).
Telephony servers in an array do not communicate with each other. Instead, the telephony servers respond to requests from the Vocera Server. All communication with telephony servers is handled by the Vocera Server.