Every way your subscribers want to connect, engineered for zero dropouts.
VoLTE (4G Voice)
Native voice over LTE with dedicated QCI-1 bearers, seamless SRVCC handover options, and sub-second call setup latencies that rival traditional circuit-switched networks.
VoNR (5G Voice)
Direct voice over 5G Standalone (SA). Future-proof your voice core as you migrate your RAN from NSA to SA, without costly re-platforming or vendor fork-lift upgrades.
VoWiFi (Wi-Fi Calling)
Flawless indoor voice coverage via untrusted Wi-Fi access networks with secure ePDG integration—the single most cost-effective coverage upgrade a mobile operator can deploy.
Complete carrier IMS architecture we deliver
The full IMS call path, engineered end to end.
From handset registration through CSCF routing to PSTN interconnect and emergency calling — the complete architecture we deliver as an auditable blueprint.
From raw SIP engine to carrier-grade IMS infrastructure.
Turnkey CSCF Topology
Kamailio is an immensely powerful SIP toolkit; a production IMS requires precise architectural design. We deliver the full P/I/S-CSCF topology, geo-redundant failover model, and routing plan as a complete, auditable carrier blueprint.
Core & SBC Interconnect
Flawless integration with our Open5GS packet core (or any existing third-party EPC/5GC), plus certified SIP trunking and interconnect to carrier clearinghouses, SBCs, and national emergency dispatch centers.
Custom SIP Routing Logic
Complex number manipulation, STIR/SHAKEN robocall mitigation, anti-fraud rate limiting, and custom service logic—coded directly inside Kamailio's high-speed routing engine by specialist SIP engineers.
MOS & Voice Observability
Real-time MOS score estimation, SIP registration drop tracking, call-setup latency dashboards, and Homer SIP packet tracing—so you spot media jitter before your subscribers notice.
SLA Accountability to 15 Min
Backed by the exact same commercial Standard, Advanced, and Mission-Critical tiers as our packet core, featuring direct access to named principal SIP engineers. Compare tiers →
Managed Voice Operations
Prefer to outsource voice operations? We operate your IMS core end-to-end under SLA—handling security patches, capacity tuning, and interconnect maintenance under SLA.
Talk voice architecture with a principal SIP engineer.
Bring your RAN and interconnect specifications to a 30-minute Teams call—we'll map your IMS topology live on the call.