What is DNCR integration in VoIP systems?

DNCR integration connects your SIP gateway to Do Not Call registries via API, allowing the system to check numbers in real time before dialing, ensuring every call is compliant.

Why is SIP gateway DNCR integration important for compliance?

Without real-time checks, you risk dialing restricted numbers, facing legal penalties, and damaging your brand. Integration at the SIP level ensures no-call numbers are blocked before they reach an agent.

How does a SIP gateway connect to a DNCR API?

The system sends a request to the DNCR API when a SIP INVITE is initiated. Based on the response, it either blocks the call (e.g., SIP 603 Decline) or routes it through normally, fully automated.

What technologies support DNCR SIP integration?

Open-source platforms like FreeSWITCH, OpenSIPS, and Asterisk can all be configured for DNCR checks using event routes, dialplan hooks, or external scripts triggered during call setup.

Can DNCR integration slow down call routing or impact call quality?

Not if implemented correctly. Modern DNCR API services offer response times under 200ms, and caching recent lookups reduces API load. With proper architecture, real-time validation doesn't affect call performance.