High Availability for Gateway Clients / Telephony High Availability |
The Vocera SIP Telephony Gateway (VSTG) uses a telephony server to communicate with a PBX. You must install and configure a VSTG for each PBX that Vocera will use. When your Vocera deployment supports multiple sites, you can accommodate any of the following configurations:
An environment where each site has its own PBX.
Enable and configure a VSTG for each site.
An environment where sites that do not have their own PBX share with sites that do have a PBX (the principal sites).
Enable and configure a VSTG for the principal sites only.
A mixed environment where some sites (the principal sites) have their own PBX, and other sites share a PBX with a principal site.
Enable and configure a VSTG for each principal site.
If any site—including the Global site—does not have telephony enabled or does not share a PBX with a principal site, the site will not have telephony access.
When you install a VSTG, you specify the IP address of the Vocera Voice Server or the list of nodes in a cluster and the name of the site it is going to connect to. The installation program sets the VOCERA_SITE environment variable based on the site name that you specify.
If you do not specify a site, the VOCERA_SITE environment variable is not set, and the telephony server is associated with the Global site. As each telephony server boots, it associates itself with the Vocera Voice Server and site specified during the installation.