The Peeredge Switch supports
· load balance (similar to round robin)
· failover (primary/secondary, etc.)
· weighted distribution for PSTN Inbound (Customer Originating) calls.
46Labs typically recommends an evenly weighted (i.e. 50/50, 33/33/33, etc.) distribution. Weighted distribution will attempt to contact all active customer SBCs/PBXs before returning a SIP 503 Service Unavailable to the upstream PSTN provider. When using the load balance distribution, if there is no response from the first customer SBC/PBX contacted then a SIP 503 Service Unavailable is sent to the upstream PSTN provider.