Vocera Client Gateway in a Multi-Site Environment

The Vocera Client Gateway (VCG) allows phone clients to communicate with the Vocera Voice Server. You must install and configure a VCG that the Vocera Smart Phone Client will use. When your Vocera Deployment supports multiple sites, you can accommodate any of the following configurations:

All client devices and the VCG server should be configured to connect to the same site location. If a VCG is not configured for a particular site, by default, the client devices connects to the VCG Global site. When you install a VCG, the user interface provides a field where you specify the IP address of the Vocera Voice Server or the list of nodes in a cluster and the name of the site with which you want the VCG to connect. During the VCG installation, the program sets the VOCERA_SITE environment variable according to the the site name that you specify in the user interface.

If you do not specify a site, the VOCERA_SITE environment variable is set to Global by default, and the client Gateway server is associated with the Global site. As each client gateway server boots, it associates itself with the Vocera Voice Server and site specified during the installation.
Note:
After installation, you can associate the VCG with a different site by manually changing the value of the VOCERA_SITE environment variable.
The figure below shows an example of a VCG array which provides redundancy, scalability, and load balancing.
Figure 1. Multiple-site Vocera Client Gateway