Legacy voice services remain critical throughout network modernization
Operators cannot retire 2G and 3G infrastructure overnight, as subscribers, devices, roaming partners, and coverage obligations continue to depend on legacy voice services.
Modernize Voice Without Disrupting Service
We help operators transition from legacy circuit-switched voice to IMS, VoLTE, and VoNR while maintaining seamless call continuity, consistent voice quality, and uninterrupted subscriber experiences throughout every stage of network modernization.
Challenges
Industry Challenges
Maintaining voice continuity across multiple network generations is complex
Calls must move reliably between circuit-switched and packet-switched networks without unnecessary drops, interruptions, or degraded voice quality.
Legacy and IMS networks use fundamentally different technologies
Bridging SS7-based circuit-switched infrastructure with SIP-based IMS environments requires intelligent signalling, media interworking, and session management.
Migration should improve—not compromise—the customer experience
Operators need to modernize their voice networks while preserving call quality, supplementary services, and service reliability across every stage of migration.
Product Overview
Accelerate Voice Network Modernization with Confidence
Our IMS & VoLTE Interworking solution enables operators to migrate from legacy circuit-switched voice networks to IMS-based VoLTE and VoNR services without disrupting existing subscribers or network operations. The platform manages signalling translation, media interworking, session control, and service continuity across legacy and IP-based voice domains, enabling a phased migration rather than a disruptive network replacement.
Support for SRVCC and eSRVCC preserves eligible IMS voice sessions as subscribers move between packet-switched and legacy circuit-switched coverage during network coexistence. Intelligent call path optimization continuously evaluates network conditions and operational policies to improve routing decisions, while DPI-based media analytics monitor voice quality throughout every interworked session.
The Outcomes Are Clear
01
Seamless voice continuity
02
Lower migration risk
03
A smoother path to IMS
Capabilities
Product Capabilities
Legacy-to-IMS Voice Interworking
Bridge circuit-switched voice infrastructure with IMS-based VoLTE and VoNR environments while maintaining reliable session continuity.
Protocol Translation and Signalling Mediation
Translate signalling between legacy circuit-switched protocols and SIP-based IMS networks to support seamless call establishment and service interoperability.
SRVCC and eSRVCC Support
Preserve eligible IMS voice sessions as subscribers move between VoLTE coverage and supported 2G/3G circuit-switched access during network migration.
Intelligent Call Path Optimization
Evaluate real-time network availability, operational policies, and service conditions to optimise call routing across legacy and IMS domains.
Media Interworking and Codec Management
Handle codec negotiation, media conversion, and transcoding where required to maintain interoperability and consistent voice quality.
DPI-Based Voice Quality Analytics
Measure Mean Opinion Score (MOS), jitter, latency, packet loss, and media quality throughout interworked voice sessions.
Supplementary Service Continuity
Maintain supplementary voice services and user experience consistently across both legacy and IMS environments.
Multi-Vendor IMS Integration
Support interoperability across heterogeneous network infrastructure while enabling a phased transition towards an IMS-centric voice architecture.
Process
How It Works
01
Connect Legacy and IMS Networks
The platform integrates with circuit-switched infrastructure, IMS platforms, VoLTE deployments, and evolving VoNR environments.
02
Translate Signalling and Media
Signalling messages, session parameters, codecs, and media streams are translated to ensure interoperability between legacy and IP-based voice networks.
03
Optimize Call Paths
Operational policies and real-time network conditions guide intelligent call path selection across available network domains.
04
Preserve Voice Continuity
SRVCC and eSRVCC procedures maintain eligible IMS voice sessions as subscribers move between supported access technologies during migration.
05
Monitor Voice Quality
DPI-based analytics continuously validate media performance and identify quality degradation across every interworked voice session.
Results
Key Outcomes
Seamless Voice Migration
Transition from legacy voice infrastructure to IMS services without disrupting subscribers or operational continuity.
Consistent Voice Quality
Maintain measurable voice performance across interworked sessions with continuous media quality monitoring.
Reduced Migration Risk
Adopt a phased modernization strategy that minimizes operational disruption and transformation complexity.
Faster IMS and VoLTE Adoption
Accelerate deployment of modern voice services while preserving compatibility with existing subscribers and infrastructure.
More Efficient Voice Routing
Improve call path selection using operational intelligence and real-time network conditions.
Extend the Value of Existing Infrastructure
Protect prior network investments while progressing towards a fully modern IMS-based voice architecture.