Cobalt Briefing · Section

The Switch-Off

The 2027 PSTN and ISDN switch-off: what's changing, when it reaches you, and how to move your phones across without a scramble.

2 stories in The Switch-Off

An old copper telephone switchboard dissolving into glowing fibre-optic strands, representing the staged move off the legacy phone network.
The Switch-Off

The switch-off won't be a 'big bang' — but the deadline still stands

Openreach says there won't be a single overnight cut-off in 2027, and the number of old lines is falling fast. The businesses left on legacy lines are the ones paying for it.

26 June 20264 min read
A glowing countdown dial entwined with an analogue phone handset and coiled cord, representing the ticking deadline for the phone network switch-off.
The Switch-Off

The phone switch-off enters its final stretch — and staying put now costs more

Roughly 2.8 million UK lines are still on the old network being switched off by January 2027, with more than half a million serving businesses. The price of waiting is going up.

22 June 20264 min read

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