Copper retirement & the PSTN sunset

The retirement of the copper telephone network has been underway for more than a decade, but it moved at the speed of regulation rather than the speed of engineering. That changed in March 2026.

What the March 2026 order changed

The FCC voted unanimously to adopt the Network and Services Modernization Order, which streamlines the process for retiring legacy copper networks and moving customers onto IP-based services. Three changes matter most.

1. Grandfathering no longer requires a filing

Carriers now hold blanket federal authority to grandfather legacy copper voice, low-speed data, and copper-based VoIP service. In practice that means a carrier can stop selling the service to new customers and move existing customers onto a retirement track using nothing more than a customer notification. No FCC filing is required at that stage.

2. Section 214 applies only at full retirement — with a 31-day clock

A Section 214 discontinuance application is now required only when a carrier moves to fully retire a service. When one is filed, a uniform 31-day automatic grant period applies across every carrier, dominant and non-dominant alike.

Before the order, a carrier wanting to retire copper in a wire center had to file a Section 214 application, sit through a public comment period, and wait for the Commission to sign off. It also had to clear a Section 251(c)(5) network change disclosure, which gave state regulators and competitors a formal window in which to object. Both of those checkpoints are gone.

3. State and local obstacles are preempted

The FCC holds that any state or local law restricting, delaying, or conditioning a carrier's ability to discontinue a service after it has received federal Section 214 authorization — including laws requiring continued copper or legacy service — is preempted, on the basis that such mandates conflict with federal policy and frustrate the nationwide transition to IP networks.

What notice you still get

The order did not remove everything. The FCC retained the 90-day direct written notice requirement. What it removed was the approval and challenge machinery that used to surround that notice.

So the sequence you should now plan against is: notice arrives, you have roughly 90 days, and there is no realistic mechanism to extend it. For a single line that is an inconvenience. For a multi-site estate with several hundred analog lines of unknown function, 90 days is not enough time to discover what is on them, procure replacements, schedule the work, and — for life-safety circuits — arrange the inspections and sign-offs that go with it.

The 911 exception

There is one significant coordination requirement that survives, and it is the one most likely to derail a carrier's schedule.

Any carrier planning to discontinue a facility or service that supports 911 call delivery must coordinate with 911 service providers at least 90 days before filing the Section 214 discontinuance. That covers a broad set of facilities:

• Interconnection trunks
• Selective router TDM circuits
• Dedicated 911 TDM paths
• Any TDM private line used for 911 transport

If you are on the carrier side, this is the dependency to map first, because the coordination window sits ahead of the filing rather than after it. If you are on the enterprise side, it is worth knowing that this requirement exists — it is one of the few things that can shift a retirement date.

Where the carriers actually are

Regulation sets the ceiling; carrier programs set the timing. The published direction of travel as of mid-2026:

The problem nobody budgets for: the copper still works until it doesn't

Long before a formal retirement date arrives, service quality on copper degrades in a way that is easy to miss because it is gradual.

The technicians who understand copper plant are retiring, and they are not being replaced. Spare parts are becoming scarce. The observable consequence is that repair times on failed POTS lines have stretched from hours to days, and in some cases weeks.

That is the number that should drive your planning, not the retirement date. If your elevator emergency phone or fire alarm communicator sits on a line that now takes a week to repair, you have a compliance and safety problem today, regardless of when the wire center is scheduled to go dark.

What to do, in order

1. Build a real inventory. Reconcile carrier billing, customer service records, and a physical survey. None of those three is complete on its own, and the spreadsheet you already have is almost certainly wrong.
2. Classify by function and criticality. Every line gets a category: elevator emergency phone, fire alarm communicator (DACT), door entry, POS terminal, fax, modem, alarm, courtesy phone, or genuinely unused. The last category is usually larger than anyone expects, and cancelling those lines often funds the rest of the program.
3. Identify the life-safety subset. These drive your critical path because of inspection and sign-off requirements, not because of technical difficulty.
4. Choose a replacement path per class — not one solution for everything. See POTS line replacement.
5. Sequence the work on your schedule, ahead of notices, rather than reacting inside each 90-day window as they arrive.

Related reading

• POTS line replacement — what to do with the lines once you've found them.
• TDM to IP migration — for T1, fractional T1 and PRI rather than analog.
• E911 & MLTS compliance — the obligations that follow you into the IP world.