You can use the SIPcity Cloud PBX as a second layer of redundancy if your on-premise PBX fails. This ensures calls are never lost.
Location: Switchboard > your number > Inbound Calls
SIPcity’s Cloud PBX provides automatic failover for both SIP peering and registration-based connections.
Registration
Enable Call Forwarding to redirect calls to alternate numbers if they aren’t answered within a set time.
SIP Peering
If you don’t have a secondary IP/PBX, enable Call Forwarding to redirect calls to alternate numbers. SIPcity’s Active Polling service monitors your connection and, if it detects your circuit offline for more than 10 seconds, automatically fails over to the alternate numbers you’ve specified in Call Forwarding.