Voice over Internet Protocol: Rural Areas
The question
To ask the Secretary of State for Science, Innovation and Technology, what steps she is taking with telecommunications providers to ensure that battery back-up solutions provided to households during the Public Switched Telephone Network migration are sufficient to cover the average duration of power cuts in rural areas.
Answered by Kanishka Narayan
The Government is committed to ensuring any risks arising from the industry-led migration of the Public Switched Telephone Network (PSTN) to Voice over Internet Protocol (VoIP) are mitigated for all customers. No household should be left without means to contact emergency services in the event of a power cut following the PSTN migration.
In December 2023 and November 2024, major communication providers signed and agreed the safeguards in the PSTN Charter and Non-Voluntary Migrations Checklist, including providing vulnerable customers with free battery back-up devices for power cuts. Ofcom General Conditions state that these devices should last for a minimum of one hour, but in practice many providers issue units that provide 4-7 hours of battery life.
In December 2023, Ofcom launched a public Call for Input on the power back-up at mobile access sites. Ofcom published an update on this work in February 2025, confirming they are completing further analysis to determine the appropriate and proportionate measures that mobile operators should put in place.
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