Question to the Department for Science, Innovation & Technology:

To ask the Secretary of State for Science, Innovation and Technology, what steps his Department is taking to help improve the (a) reliability and (b) longevity of back-up Voice over Internet Protocol phone batteries for vulnerable people; how many (i) telephone exchanges and (ii) mobile telephone masts have back-up generators; and if he will take steps to ensure that (A) the 999 service and (B) other critical infrastructure in Cornwall remains telecommunication operational at all times.

On 18 November, the Department published guidance which defines the groups of vulnerable people to whom Communication Providers must provide extra support as they are migrated from the Public Switched Telephone Network (PSTN) to Voice over Internet Protocol (VoIP) telephony.

The Department also published a checklist of actions that telecoms companies should take before migrating customers to VoIP without their active consent. One of the actions stipulated in the checklist is for telecoms companies to provide resilience solutions that go beyond Ofcom’s regulatory minimum of 1 hour of continued, uninterrupted access to emergency services during power outages for users that depend on their landline.

The Department does not record the number of telephone exchanges and mobile telephone masts with back-up generators in the UK. However, the Communications Act 2003, mandates public telecom providers to take measures to protect the security and resilience of their networks, including critical infrastructure and access to 999. The sector does this by having backup generators in phone exchanges and allowing all 999 calls from mobiles to switch to another network if needed. Ofcom sets, monitors, and enforces these regulations. The Department is working together with Ofcom and other key stakeholders to enhance the power resilience of telecommunications across the UK.