AT&T POTS Sunset 2026: What Businesses Need to Know

What's happening with copper POTS lines

"POTS" stands for Plain Old Telephone Service — the legacy copper wire system that has carried voice calls for over a century. AT&T, Verizon, Lumen, and other ILECs have been retiring this infrastructure for years, but the pace has accelerated significantly in 2024–2026.

The driver: under FCC rules, carriers no longer have to maintain copper lines indefinitely. They've filed copper retirement notices for thousands of central offices nationwide. Once the retirement is approved, customers in that wire center get a 90-day disconnect notice — and then the line goes dead.

AT&T has been the most aggressive. By the end of 2026, an estimated 70–80% of their legacy copper footprint will either be decommissioned or in active retirement filings. Verizon is on a similar but slower track. Lumen (CenturyLink) is following.

Why the price hikes started before the shutdown

Here's the part most facility managers miss: AT&T started raising POTS prices aggressively years before the actual disconnect. The current cost per line is often 5–15× what it was a decade ago. Some lines we've audited recently are billed at $150–$220 per month — for what used to be a $20–$40 service.

Why? Two reasons:

1. It's no longer a regulated tariff service in most states. Once states deregulated POTS, AT&T was free to set whatever price the market would bear — and most customers don't notice line items on autopay.
2. It's a managed retreat. AT&T wants customers off copper. Raising the price is the most efficient way to push migration without the regulatory blowback of a hard shutdown.

The kicker: most companies pay these inflated rates without realizing it. The bill goes to AP, AP pays it, nobody compares this year to last year. We routinely audit invoices where a $40 line in 2018 is now $190 in 2026.

What's at risk in your building

When most people hear "POTS," they think of desk phones. Those are mostly gone — replaced by VoIP and UCaaS years ago. The lines that are still on copper are the ones nobody thinks about:

• Fire alarm dialers — the line that connects your fire panel to the central monitoring station
• Elevator emergency phones — required by code in every elevator
• Burglar/intrusion alarm dialers — same monitoring station connection
• Gate intercoms at parking garages, gated communities, loading docks
• Fax lines — yes, still — especially in healthcare and law
• Out-of-band management lines for network equipment, modems, and lift station controllers
• Power station / utility / SCADA dialers at remote sites

A typical mid-sized commercial property has 8–25 of these lines. A multi-location portfolio (school district, hospital network, property management group) often has hundreds. Most have not been audited in years.

The fire alarm compliance gap nobody mentions

NFPA 72 — the National Fire Alarm and Signaling Code — requires that fire alarm systems maintain a working communication path to the monitoring station 24/7. This is a code requirement enforced by most local AHJs (Authorities Having Jurisdiction) during fire inspections.

When AT&T retires the copper line that serves your fire alarm, the dialer doesn't always fail loudly. The panel may continue to look normal — green light, no error tones. But the supervisory signal to the monitoring station has gone dead, and your building is technically out of code compliance the moment the line stops working.

This is the strongest case for getting ahead of the sunset rather than waiting for the disconnect notice. A reactive scramble at the 90-day mark, with no time to plan, is when mistakes happen — wrong device, wrong cellular carrier coverage, wrong UL listing. Doing it on your own timeline is much cleaner.

How wireless POTS replacement actually works

The replacement technology is well-established and surprisingly simple. A wireless POTS replacement device — sometimes called a cellular ATA or POTS-in-a-box — sits between your existing equipment (fire panel, elevator phone, alarm dialer) and the outside world. It presents the same RJ-11 jack the copper line used to. On the back end, it's connected to a cellular network instead of copper.

To your fire panel, it looks exactly like a copper line. Same dial tone, same DTMF, same protocols. Your alarm dialer sends a Contact ID message to the monitoring station, the device packetizes it, sends it over LTE, and the central station receives it as if it came over copper.

Key technical points:

• UL-listed for fire and burglar alarm use (UL 864 / UL 1610 / UL 1635) — required for code compliance
• Dual-SIM on most enterprise units — primary and backup carrier, automatic failover if one network has an outage
• Battery backup built in (4–24 hours typical) for power-loss survivability
• Line voltage — provides the standard 48V the panel expects, no equipment changes
• Supervisory monitoring — the device itself is monitored, so a device failure raises an alert
• Fire-code path planning when properly listed equipment, vendor coordination, and local approval requirements are handled

Install time is typically 30 minutes per line. No system downtime — the cutover happens during a brief window with the fire alarm in test mode. No rewiring, no new hardware on the customer side.

What it costs (real numbers)

Here's a rough picture from invoices we've audited and replaced this year. Your numbers will vary based on geography, carrier coverage, and device choice, but the ranges are typical:

Service	Copper (now)	Wireless replacement
Standard analog line	$45–$110/mo	$20–$30/mo
Fire alarm circuit (UL-listed)	$80–$150/mo	$25–$35/mo
Elevator emergency phone	$50–$95/mo	$22–$32/mo
Long-distance per minute (legacy)	$0.08–$0.22/min	Included

Equipment is typically included in the monthly cost (subsidized by the multi-year service agreement) or sold outright at $200–$500 per device depending on features. Most building owners we work with see a payback period inside 4–8 months on a portfolio basis.

Across a multi-location portfolio, the savings compound quickly. A facility with 20 copper lines averaging $90/month is paying $21,600 a year. The same lines on wireless run roughly $7,200 a year — a savings of $14,400 annually, ongoing.

How to prepare in 4 steps

1. Pull your most recent AT&T (or Verizon, Lumen, etc.) invoice. Search for "POTS," "analog line," "business line," "1FB," or "metallic." These are the line items at risk.
2. Count what you have and where. Most facilities have 2–3× more copper lines than anyone realizes. Old fax lines, decommissioned panels, gate phones at properties no longer owned — all on autopay.
3. Categorize by criticality. Fire alarm, elevator, and other life-safety lines need to migrate first and require UL-listed equipment. Office-side fax and reception lines have more flexibility.
4. Get a wireless replacement quote against your current invoice, including the equipment, service, install, and cellular coverage check at your address.

The fourth step is where most companies get stuck — there are dozens of wireless POTS replacement vendors, and the pricing, equipment quality, and carrier coverage vary widely. That's exactly the kind of comparison work an independent broker is built for.

Want to dive deeper into wireless POTS replacement, including which devices we recommend for fire alarm vs. elevator vs. general business lines? See our POTS Replacement Brief.