The public switched telephone network (PSTN) is the traditional global system for voice communication that connects calls through physical telephone lines and circuit-switched networks. Also known as the public telephone network, PSTN enables landline and mobile calling. As digital transformation accelerates, many enterprises are migrating from PSTN to modern cloud-based solutions for scalability and flexibility.
For decades, enterprises relied on PSTN for dependable voice calling across local and global networks. PSTN provided consistent audio quality and secure, direct connectivity through copper lines. Even as organisations adopt cloud-based communication, many still use PSTN calling for critical operations that require stability and legacy system support.
The upcoming PSTN switch-off in many regions is driving enterprises to modernise their infrastructure. Organisations are replacing traditional landline systems with cloud contact centre platforms like the Genesys Cloud™ platform. This migration provides advanced capabilities such as AI-powered routing, omnichannel engagement, and seamless integration with digital tools – whilst eliminating the need for physical phone lines.
Many enterprises operate in hybrid environments, blending PSTN connectivity with VoIP (Voice over Internet Protocol) and cloud solutions. This allows companies to maintain existing PSTN lines whilst benefiting from AI-powered CX features such as call transcription, sentiment analysis, and journey orchestration. Integration ensures service continuity during digital transformation.
Enterprises with large, distributed operations use the public switched telephone network to ensure reliable connectivity in regions where internet access is limited. PSTN networks provide consistent voice coverage and redundancy, acting as a backup for cloud-based communication systems in mission-critical industries like finance, healthcare, and government.
During the transition from PSTN to IP-based systems, organisations rely on hybrid models to minimise disruption. By gradually migrating to cloud voice solutions, businesses maintain operational continuity whilst enabling advanced features such as predictive engagement, AI-powered IVR, and digital self-service – all built on modern communication infrastructure.
As the PSTN network evolves, enterprises are moving towards cloud-native communication that supports agility, scale, and innovation. The Genesys Cloud CX® offering unifies voice, digital, and AI capabilities, helping organisations modernise their telephony infrastructure and deliver exceptional customer experiences beyond the limitations of the public switched telephone network.
