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Round robin routing distributes inbound calls sequentially across all configured IP addresses in a SIP connection. Each IP receives equal call volume regardless of active call load.

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How it works

Calls route to IPs in sequential order: 
Call 1 → IP 1
Call 2 → IP 2
Call 3 → IP 3
Call 4 → IP 1 (cycle repeats)

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Failover behavior

If the target IP fails, the system attempts remaining IPs in sequence. All IPs function as backups for each other. Example: If IP 2 is selected first and fails, the system tries IP 3, then IP 1.

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Configuration

PATCH /v2/ip_connections/ 
{
  "default_routing_method": "round-robin"
}

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Limitations

  • Only counts inbound call distribution, not active call load
  • An IP handling 100 active calls receives the same incoming call rate as an IP handling 10 active calls

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Use cases

  • Distributing load across multiple PBX instances
  • High-availability setups without dedicated failover systems
  • Deployments where simple call distribution is sufficient