Definition
SIP Trunking
Delivering telephone calls over an internet connection using the SIP protocol.
SIP trunking is the delivery of telephone calls (voice communications) over an internet connection using the Session Initiation Protocol (SIP), replacing traditional physical phone lines. A SIP trunk is a virtual connection between an on-premise phone system (PBX) or cloud platform and a VoIP carrier.
Businesses use SIP trunking to connect their existing phone numbers and PBX infrastructure to cloud-based services like AI voice agent platforms without physically rewiring anything.
How SIP trunking works with TurboCall
- Your SIP provider (Twilio, SignalWire, Bandwidth, etc.) routes inbound calls to TurboCall's SIP endpoint
- TurboCall handles the call with your AI voice agent
- For outbound calls, TurboCall initiates calls through your SIP provider
Benefits of SIP trunking for AI voice agents
- Keep your existing phone numbers during migration
- No carrier lock-in — switch AI providers without porting numbers
- Concurrent call capacity scales without adding physical lines
- Lower per-minute costs than traditional PSTN for most use cases
TurboCall's BYON feature allows you to connect your existing SIP trunk to route calls through TurboCall AI agents while maintaining your current carrier relationship.