Virtualized IMS

Realize the potential of IMS and the reduced operational expenses of NFV

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    The first and only complete cloud native IMS core

  • icon-web-methodologies

    Built using web and microservices methodologies

  • icon-service-assurance-server

    Provides carrier-class reliability from IT-grade cloud

  • icon-network-slicing

    Supports dynamic lightweight Linux containers

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    Highly orchestrated instantiation for network slicing

  • icon-voicelte

    Foundation for VoLTE, VoWiFi and RCS


Metaswitch’s powerful and flexible cloud native virtualized IMS (vIMS) core enables network operators to transition fully from circuit-switched telephony infrastructures to all-IP, and to provide globally ubiquitous rich communications services in complete confidence.

Clearwater Core is Metaswitch’s implementation of IMS built exclusively using web development methods to provide voice, video and messaging services to millions of users or IoT endpoints. Architected from the ground up for massively scalable deployments within virtualized public, private or hybrid elastic compute clouds, Clearwater Core combines the economics of over-the-top (OTT) style service platforms with the standards compliance and reliability expected of telco-grade network solutions.

  • Cloud native VNFs
  • Uses web components, design patterns and implementation approaches
  • Microservices methodologies
  • Distributed state maintenance
  • Supports deployment in public or private cloud infrastructures
  • Supports standard lightweight Linux containers
  • Supports 5G end-to-end network slicing

Download our white paper "The application of cloud native design principles to network functions virtualization".

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Why use Metaswitch’s Virtualized IMS solution?

The IP Multimedia Subsystem (IMS) is finally ready to deliver on the promise of ubiquitous VoLTE and converged rich communications services; but to fully realize the potential, network operators must think beyond simple virtualized network functions to fully cloud native IMS components. 

When designing Clearwater Core, Metaswitch adapted web design principles to fit the requirements of SIP and IMS so that Clearwater Core could deliver dynamic, granular, elastic scalability and unmatched resilience even in IT-grade cloud infrastructures.

  • Carrier-class reliability from IT-grade compute clouds
    Unparalleled granularity when scaling out individual processing functions
  • Reduces costs while increasing flexibility and service resilience when compared to virtual machines
  • Foundation for secure and feature-rich Voice over LTE (VoLTE), Voice over Wi-Fi (VoWiFi) and rich communications suite (RCS) services
Rapid service innovation is the single most important driver for sustainable competitive advantage in the mobile industry.

Rob Snijder, CTO, Teleena

Rob Snijder
CTO, Teleena

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