The Copper Sunset Timeline: Key Dates and What You Should Do Now

The Copper Sunset Is Not a Distant Event — It's Underway

If your business operates more than a handful of locations, there's a strong chance you're still paying for copper-based telecom services — POTS lines, T1 circuits, PRI trunks, or DSL connections. These services, delivered over the same copper infrastructure that has connected American businesses for over a century, are being systematically retired by every major carrier.

The industry term is "copper sunset," and it's not a single date on a calendar. It's a rolling, carrier-by-carrier, state-by-state process that has already begun. Here's what's happening, when, and what you need to do about it.

FCC Order 19-72: The Regulatory Framework

In 2019, the FCC issued Order 19-72, which established a formal process for carriers to discontinue legacy copper services. The order balanced two competing priorities: giving carriers the flexibility to transition to modern networks, and protecting customers from abrupt service loss.

Under the order, carriers seeking to retire copper services must:

Provide notice to affected customers (typically 90 days for residential, 180 days for business services)
Demonstrate that replacement services offer equivalent functionality, reliability, and coverage
Meet specific notification and outreach requirements to ensure customers are aware of the transition

Importantly, Order 19-72 distinguishes between "regulated" and "unregulated" services. Regulated services (traditional POTS lines used for voice) have stronger customer protections. Unregulated services (T1 data circuits, PRI trunks, DSL) face fewer restrictions, and carriers can move more quickly to discontinue them.

Carrier-by-Carrier Timeline

AT&T

AT&T has been the most aggressive major carrier on copper retirement. The company has publicly targeted retiring the vast majority of its copper footprint, and it's executing state by state. AT&T stopped selling new copper-based services in most of its territory years ago and is actively migrating existing customers to fiber and wireless alternatives. In several states, AT&T has already received regulatory approval to discontinue copper services entirely in specific wire centers.

Verizon

Verizon's copper retirement strategy has been shaped by its significant fiber investment (FiOS). In the Northeast and Mid-Atlantic, where FiOS coverage is extensive, Verizon has been steadily decommissioning copper. The company has been more measured in areas without fiber overbuild, but the direction is clear: copper is not part of Verizon's long-term network plan.

Lumen (formerly CenturyLink)

Lumen inherited a massive copper footprint spanning rural and suburban markets across 37 states. The company faces a steeper challenge than AT&T or Verizon because many of its copper-served areas lack fiber alternatives. Lumen has indicated it will prioritize copper retirement in areas where fiber is available and maintain copper longer in areas where alternatives don't yet exist. This creates a patchwork timeline that varies significantly by market.

Consolidation Effects

The carrier landscape continues to evolve. Brightspeed's acquisition of Lumen's assets in 20 states, combined with ongoing consolidation among smaller rural carriers, means the copper sunset isn't just a Big Three story. Regional operators are also evaluating their copper infrastructure, and many are accelerating retirement timelines.

What Services Are Affected

The copper sunset doesn't affect just one type of service. Here's what's being retired:

POTS lines (analog voice): The most common copper service. Used for voice, fax, alarm panels, elevator phones, and building systems. Estimated 36+ million POTS lines remain in service nationwide as of 2026, but the number is dropping fast.
T1 circuits: Digital circuits delivering 1.544 Mbps. Once the workhorse of business connectivity, T1s have been largely replaced by fiber and broadband, but many remain in use for legacy PBX systems, point-to-point data, and backup connectivity.
PRI trunks (Primary Rate Interface): 23-channel digital voice circuits connecting PBX systems to the PSTN. As businesses migrate to SIP trunking and hosted VoIP, PRIs are being retired at an accelerating rate.
DSL: Copper-based broadband that, in many rural areas, remains the only wired internet option. DSL retirement creates the most acute challenges because affected customers often have no wired alternative.

Regulated vs. Unregulated: Why It Matters

The regulatory classification of your copper services determines how much notice you'll receive and what protections apply:

Regulated services (typically voice-grade POTS lines) are subject to state public utility commission oversight. Carriers must file for permission to discontinue these services and must demonstrate that alternatives exist. The notification period is generally longer — up to 180 days.

Unregulated services (T1, PRI, DSL, and in some states, POTS lines used exclusively for non-voice purposes like alarm monitoring) face lighter regulation. Carriers can discontinue these services with minimal notice — sometimes as little as 30 days.

The practical implication: if your fire alarm panel or elevator phone is on an unregulated POTS line — which is common when the line is used exclusively for alarm transmission — you may have significantly less time to migrate than you expect.

State-by-State Variation

Copper retirement is not a national mandate. It's happening at the state level, and the timeline varies dramatically:

California: The CPUC has maintained relatively strong consumer protections, requiring carriers to demonstrate equivalent alternatives before receiving approval for copper discontinuation.
Texas: A more carrier-friendly regulatory environment has allowed faster copper retirement in areas with alternatives available.
Northeast states: Generally aligned with Verizon's measured approach, with stronger consumer protections in states like New York and Massachusetts.
Southeastern states: Mix of regulatory approaches, with generally faster copper retirement timelines.

Your state's public utility commission website typically maintains information on carrier discontinuation filings. If you operate across multiple states, you may face different timelines in different markets.

What to Do If You Receive a Disconnect Notice

First: don't panic. A disconnect notice is not a service cutoff tomorrow — but it does mean you're on a clock. Here's what to do:

Read the notice carefully: It should specify the affected circuit IDs, the proposed discontinuation date, and the carrier's suggested replacement service.
Identify what each circuit connects to: A POTS line serving a fax machine is very different from one serving a fire alarm panel. Prioritize life safety and business-critical circuits.
Contact the carrier: Confirm the timeline and ask about extension options. Carriers will sometimes grant extensions for customers making a good-faith effort to migrate.
Engage a migration partner: If you manage multiple locations, a telecom partner can handle the entire migration — auditing lines, coordinating with carriers, deploying replacements, and testing every circuit.
Notify your monitoring companies: If you're migrating fire alarm or security lines, your central station needs to be part of the process. Give them the new communicator information before you cut the old line.

The Four-Step Migration Roadmap

If you haven't started yet, here's the path forward:

Step 1: Audit

Inventory every copper circuit in your portfolio. For each line, document the carrier, circuit ID, monthly cost, what it connects to, and whether it's regulated or unregulated. This audit is the foundation of your migration plan.

Step 2: Plan

Prioritize by risk. Life safety circuits (fire alarms, elevator phones) migrate first. Business-critical circuits (POS, nurse call, security) come next. Ancillary circuits (fax, backup lines, rarely-used extensions) migrate last. Build a phased timeline with clear milestones.

Step 3: Select

Choose replacement solutions that match each circuit's requirements. Fire alarms need UL 864-listed cellular or IP communicators. Voice lines can move to VoIP or wireless voice. Data circuits can migrate to fiber, broadband, or fixed wireless. The right solution depends on availability at each location.

Step 4: Migrate

Execute in phases. Test every circuit after migration. Maintain the old copper lines until you've confirmed the replacements are working — parallel operation during transition prevents gaps. Document everything for compliance and future audits.

The clock is ticking on copper. TrustedNetworx has managed copper-to-modern migrations for hundreds of locations across property management, senior living, hospitality, and healthcare. Schedule a free line audit and we'll map your entire copper footprint, identify every risk, and build a migration plan that keeps your business connected and compliant.