The Copper Sunset

The copper sunset is the retirement of traditional analog phone lines — POTS lines — by the carriers that have run them for a century. It is not a proposal or a trend. Carriers are physically removing the equipment, the FCC cleared most of the remaining obstacles in March, and the notice you get before your line goes dark can now be as short as a few months.

If the only thing on copper at your business is a fax machine nobody uses, this is a billing problem. If your elevator phone, fire panel, or alarm circuit is on copper, this is a compliance problem with a deadline attached.

I’m Robert Harney. I’ve been building and running phone systems for Chicago businesses since I started Open One Solutions in 2009. I have watched this coming for years, and what changed in the last six months is the speed. So here’s the honest version of where things stand and what actually needs to happen.

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What is the “copper sunset”?

The copper sunset is the industry-wide shutdown of the copper telephone network — the physical wire that carries POTS lines, or “plain old telephone service.” Carriers including AT&T, Verizon, Lumen, and Frontier are retiring copper facilities and discontinuing the analog services that run on them, replacing them with fiber, cellular, and IP-based alternatives.

The name is gentler than the reality. Nobody sends you a letter that says “your copper line is being retired.” You get a notice you may not read, and a bill that keeps climbing until the day the line stops working.

What changed in March 2026 — and why your planning window shrank

For decades, a carrier that wanted to stop providing your copper service had to work through Section 214 of the Communications Act: file an application with the FCC, demonstrate an adequate replacement existed, allow public comment, and wait. State regulators could object. That process was slow, and slow was good for anyone who still had lines in the ground.

On March 26, 2026, the FCC adopted the Network and Services Modernization Order, and most of that friction went away. In plain terms:

• Carriers now hold blanket authority to grandfather legacy copper voice service — they notify customers, and file nothing with the FCC.
• The old adequate-replacement and alternative-options tests were consolidated into a single, lower-bar rule.
• Discontinuance applications are now automatically granted after thirty-one days if no objection is sustained.
• State rules that conflicted are preempted. The state-level backstop some businesses were quietly relying on is gone.
• 911 protections survived. A carrier retiring facilities that support 911 has to coordinate with 911 authorities in advance, and any replacement has to preserve E911. That is the one meaningful protection left, and it matters.

None of this created the copper sunset. It removed the speed limit from something already in motion. AT&T has committed to retiring its entire copper network by 2029, began physically decommissioning roughly five hundred wire centers in June, and filed in July for authority to discontinue service across portions of fifty-five more wire centers in thirteen states — with discontinuances possible as early as October 16, 2026.

The practical takeaway: the window between a carrier deciding to retire your wire center and your lines going dark is now measured in months, not years.

Why are carriers retiring copper POTS lines?

Because copper is the most expensive network they own and the least used.

It is a hundred-year-old physical plant that needs trucks, technicians, and parts that are no longer manufactured. Almost all voice traffic moved off it years ago. What is left is a small number of lines generating a shrinking amount of revenue against a maintenance cost that only goes up.

That is not a conspiracy, it is arithmetic. But it does mean the incentive runs entirely one direction: the carrier wants those lines gone, and until they are gone the carrier would like them to be as profitable as possible.

Why are POTS line prices climbing so fast?

Here is where it gets expensive in a way most people do not track.

A POTS line that cost thirty or forty dollars a month a decade ago is now routinely billed at $150 to $1,200 a month or more, plus the associated taxes and fees. I have seen lines as high as $1,800 each, plus taxes and fees. The increases arrive without notice. Some of that is genuine cost. A lot of it is a deliberate pricing strategy to push the last customers off the network.

And this is the part I want you to actually check. Most businesses are paying for POTS lines they do not use.

I have never done a line audit for a building where the count was right. There is always a fax line for a machine that was thrown out, a modem line for a system that was replaced, a line for a burglar alarm that got upgraded to cellular three vendors ago. Nobody cancels them, because nobody knows they exist. The carrier is not going to call and ask.

So before you price a replacement, find out what you actually have. On a bill of eight lines, it is common to find two or three that can simply be shut off. At even two hundred dollars a line, that is real money, and it costs nothing to discover. (If you want the full breakdown of where a phone bill’s taxes, fees, and line items actually come from, our business phone system cost guide covers that in detail.)

Which lines are most affected — fax, alarms, elevators, fire?

The lines that are hardest to move are the ones that were never really phones. They sit in a closet, they have worked for twenty years, and nobody has thought about them since the day they were installed.

Fax and point-of-sale are a project. Elevators and fire panels are a different category, and they deserve their own section.

Do elevator and fire-alarm lines have special requirements?

Yes, and this is the single most important thing on this page.

Copper retirement does not retire your code obligation. When the line goes away, the requirement stays exactly where it was.

• Elevators. ASME A17.1, the Safety Code for Elevators and Escalators, requires every cab to have a means of two-way communication with a location staffed to respond to emergencies. It has to dial out automatically, it has to be monitored, and it needs battery backup — the code calls for four hours. Inspectors test the emergency phone as part of the annual inspection. A non-functional elevator phone fails, and in many jurisdictions a failed inspection means the elevator comes out of service.
• Fire alarm. NFPA 72 governs how a fire alarm panel communicates with its monitoring center, and the devices carrying that signal generally need to be UL-listed for the purpose. Worth knowing: two copper lines have not satisfied NFPA 72 dual-path requirements for more than a decade. Redundancy now means two different transports, not two of the same wire.

And here is the trap I most want you to avoid.

A generic VoIP adapter will not pass these inspections. Plugging a fire panel or an elevator phone into an ordinary analog telephone adapter and calling it done is the cheap answer, and it is the wrong one. The replacement needs to be a purpose-built, listed device, and for life-safety circuits the traffic generally needs to stay on a managed network rather than crossing the public internet.

This is the same thing I say about AI and about phone bills. The cheap version of the answer is usually the expensive one — you just pay later. Except here you might pay with a shut-down elevator or an insurance problem.

One more practical note: codes are adopted locally. Confirm the edition your Authority Having Jurisdiction enforces before you buy anything, and get the compliance documentation your inspector will want as part of the installation — not afterward.

The question that decides everything: does your replacement actually meet code?

If you take one thing from this page, take this. Does the POTS replacement service meet and exceed federal, state, and local ordinances and guidelines?

In our site surveys we regularly find well-intentioned facility managers who already have a solution in place that does not meet those guidelines. Nobody set out to be non-compliant. They bought something that was described as POTS replacement, it made a dial tone, and everyone moved on. It is important to understand the laws and regulations covering what truly constitutes POTS replacement — because a device that mostly works is not the same as a device that passes.

What a real replacement has to do

Most cellular replacement products fall short, and they fall short in predictable ways. The questions to ask:

Our solution runs both cellular and a connection into your existing internet service — coax or fiber — with a minimum eight-hour battery backup. It is a bit more than a bare cellular box. It also meets and exceeds the federal, state, and local mandates for what constitutes a true life-safety line. And it is proactively monitored, with notifications sent the moment a system issue arises, so a failure gets attention immediately rather than at the next annual inspection.

What are my options to replace a POTS line?

It depends entirely on what is on the other end of the line, which is why the inventory comes first.

• Eliminate it. The best replacement for a fax line serving a machine nobody uses is no line. Start here — it is free.
• Move it onto your cloud phone system. For anything that is genuinely a phone — a back-office line, an intercom, a courtesy phone — this is usually the simplest and cheapest path.
• Certified cellular replacement device. For life-safety and monitored circuits. A purpose-built appliance plugs into the existing jack, carries the signal over cellular with battery backup, and keeps your existing hardware — the elevator handset and the fire panel stay exactly where they are. Only the path changes.
• Consolidate. Several analog lines can often ride a single device, which is where most of the savings show up.

Our own POTS replacement solution covers all four of these paths, built around whichever one fits what we find on your line inventory.

What it costs

A certified POTS replacement line that meets the mandatory guidelines typically runs $50 to $75 per line per month, plus the associated taxes and fees — a fraction of what copper now costs.

There is also a one-time setup charge, based on what our on-site audit finds. Typical deployment charges range from $499 to $999, and can be more if specialized cabling is required. The good news is that after the audit you will know the exact charges for the project rather than a range.

Know the exact numberGet a real quote after the on-site audit

How urgent is this for my business?

Straight answer: if you have life-safety lines on copper, you are already late, and I would rather tell you that than be polite about it.

Not because something happens tomorrow. Because the sequence is unforgiving. A carrier can grandfather your service with a notice. Later it files to discontinue and gets an automatic grant in about a month. Then you get your notice, and you are trying to schedule an elevator inspection, a fire-alarm vendor, and a monitoring-center cutover inside a window you did not choose. That is when people make bad decisions and buy the wrong box.

Doing it early costs the same and works better. Doing it late costs more and sometimes fails an inspection.

What I would do this month

1. Pull your last full phone bill and list every analog line on it.
2. Walk the building and find what is actually on the other end of each one. Expect surprises.
3. Rank by risk. Life-safety first, revenue-critical second, convenience last.
4. Cancel what nobody uses. Immediate savings, zero risk.
5. Migrate the life-safety lines first, with certified equipment and the compliance paperwork in hand.

That is a couple of hours of work, and it is the difference between managing this and reacting to it. It is also very important that your POTS replacement service meets and exceeds federal, state, and local laws and regulations. Many systems fall short.

Two real buildings

Numbers in the abstract are easy to argue with. Here are two buildings we actually walked.

A property management group with two locations

They oversaw two properties and held bills from two different providers. One provider was charging $150 per line. The other was charging $1,200 per line, plus the associated taxes and fees on both. All in, they were paying over $3,200 a month for these services.

We proposed an initial deployment charge of $1,800 and ongoing charges of $400 a month — a saving of more than $2,800 every month. They paid for the complete deployment inside the first month, and they are now saving over $33,600 a year. On top of the savings, the system is proactively monitored, so those lines are verified as working rather than assumed to be.

A Chicago condo association

They were paying over $1,200 a month for POTS service. We came in with an initial deployment charge of $995 and ongoing charges of about $395 a month — a saving of over $800 a month, more than $9,600 a year.

And alongside the savings, the solution provides proactive monitoring plus a complete log of all communications with the fire panel — which is exactly the documentation you want in hand when an inspector asks.

What to do next

If you do not know what is still on copper in your building, that is the place to start, and it is not a hard thing to find out. Send us your phone bill and we will tell you which lines are analog, which ones look like nobody is using them, and which ones have a code obligation attached.

From there we perform a complete on-site building audit. The charge is typically $199, and we apply it toward the deployment if you choose to move forward with our recommendations. Either way you end up with a report covering what you need to do to be genuinely compliant, and what needs to be completed from a facilities perspective.

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