|Preparing for a New Installation / Preparing the Vocera SIP Telephony Gateway|
For PBX failover support, you can configure Vocera SIP Telephony Gateway to use multiple call signaling addresses.
On the Telephony > Basic Info page of the Administration Console, select the Call Signaling Address field and enter a comma-separated list of call signaling addresses for two or more IP PBXs or VoIP gateways. At startup, Vocera SIP Telephony Gateway tries each PBX or gateway in the order specified and uses the first one that responds. If that PBX or gateway goes down, Vocera SIP Telephony Gateway switches to another one.
The VSTG uses the response to a SIP OPTIONS message to determine if the PBX or gateway is currently available.
In some situations, using TCP as the signaling transport protocol reduces the length of time required for the VSTG to recognize that the current PBX is down and move to the next PBX in the list.
You can override the call signaling address for a particular Vocera SIP Telephony Gateway and have it connect to a different PBX than the one used by other Vocera SIP Telephony Gateway servers in the array.
For more information, see the Vocera Voice Server Telephony Configuration Guide.