Transforming Voice - IMS for PSTN Modernization in ETSI Markets

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Executive Summary

For many service providers, the PSTN network is aging and operational costs continue to increase. This triggers the need to make strategic choices for voice network evolution. Even if some service providers still see legacy voice growth, they must make architectural choices that enable new revenue generating services in the near future. This discusses the market dynamics and technical approaches to migrate POTS and ISDN services to VoIP. It explains how IP Multimedia Subsystem (IMS), with its open, standards-based architecture and interfaces, provides a straightforward and future-proof solution for PSTN modernization for service providers in mature and emerging markets.

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