IMS, VoLTE, and VoNR reference workspace

Voice service architecture, SIP/IMS references, and VoLTE/VoNR call procedures.

This section organizes packet voice architecture and procedures for engineers working on IMS, VoLTE, and VoNR deployment, testing, and troubleshooting.

IMS VoLTE Architecture Core architecture and service path. IMS SIP Requests and Codes Useful SIP signaling reference. VoNR Call Flow Procedures Voice over NR procedure hub. VoLTE Tutorial Voice over LTE fundamentals.

Architecture and signaling

Core voice architecture and SIP/IMS reference material.

IMS VoLTE Architecture IMS entities and interfaces. MMTel over IMS MMTel service perspective. IMS SIP Requests and Codes Signaling methods and response handling. IMS Emergency Session Emergency session context.

Voice procedures

Practical registration and call establishment flows.

VoNR Registration IMS registration over 5G. VoNR Mobile Originated Call MO voice call sequence. VoNR Mobile Terminated Call MT voice call sequence. VoLTE Call Flow and Procedures Legacy VoLTE reference page.