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Circuit Switched Core

Circuit Switched Core - Rel-4 mobile voice solution

Improving the customer experience is a fundamental way to differentiate from your competitors and the evolution of voice services plays a key role in that effort. Even though VoLTE is just around the corner, yet still need to support 2G and 3G voice subscribers efficiently, while guaranteeing a seamless evolution to VoLTE, with no disruptions to your customers, while also cutting costs.

It’s vital to take a strategic view with any Rel-4 solution installed providing a clear evolutionary path to VoLTE and the Telco Cloud.

Nokia Open MSS and Open Multimedia Gateway are our flagship products for Rel-4 based mobile voice switching. With a market leading installed base and a strong track record of performance, they act as a springboard to the evolution of traditional mobile voice into VoLTE and cloud.

Nokia Circuit Switched Core: Growing flexibility with the Cloud

Nokia Circuit Switched Core: Voice over LTE - VoLTE


Network modernization

If you are running earlier versions of Rel-4 solutions, you can benefit greatly by modernizing your network to ATCA hardware architecture. In some cases, there could be savings of up to 85 percent in power consumption and other OPEX. ATCA Rel-4 modernization investments are future-proof because the same units can be reused as TAS in a VoLTE solution.

The business benefits

  • Drastic OPEX savings compared to traditional mobile switching technologies
  • Significantly lower floor space requirements compared to traditional solutions
  • Fast time-to-market – all custom interfaces previously deployed are still available
  • Investment protection – solution evolves to VoLTE
  • Professional service for end-to-end design, planning and integration

Nokia Circuit Switched Core: Benefits of hardware consolidation


We offer a market leading Rel-4 mobile voice solution based on state-of-the-art ATCA hardware, which delivers high performance while guaranteeing backward compatibility. Our hardware independence and smooth evolutionary approach also guarantees an efficient transition to new technologies like VoLTE and cloud. In fact, all the developments and integrations made for the MSC Server and Multimedia Gateway can be reused in our Nokia Open TAS, our VoLTE application server. This offers a significant reduction in the time-to-market and the cost to launch VoLTE.