What Is the “Copper Sunset”?
The copper sunset refers to the rapid retirement of traditional copper-wire networks that deliver analog voice service.
Instead of continuing to support copper-based analog lines, carriers are discontinuing these services and pushing customers toward:
- IP-based voice
- Fiber-connected solutions
- Cellular and fixed wireless alternatives
- Modern voice platforms with backup and resiliency features
Major Carriers Announce Plain Old Telephone Service (POTS) Lines Are Going Away Now
Large carriers are no longer delaying copper retirement. Instead, they’re moving aggressively:
- AT&T issued a sweeping grandfathering notice effective October 15, 2025, covering all wire centers across 18 states. No new POTS or specialty line orders will be accepted as of this date. Rates for existing lines are already spiking, in some cases exceeding $2,700 per line per month.
- AT&T followed in 2026 with discontinuation notices announcing full discontinuation of copper POTS services beginning in June 2026.
- Lumen issued a grandfathering notice across 14 states, signaling that a full copper retirement notice is imminent.
Both carriers have made it clear: the copper era is ending. Grandfathering is only the first step. Once discontinuance notices are filed, businesses have only 180 days to transition or risk losing service.
Copper Retirement Timeline: When Are POTS Lines Going Away?
Copper retirement has been unfolding in stages, with each new step increasing the cost of putting off copper lines replacement. While 2025 saw mass grandfathering and cost escalation for copper lines, 2026 will accelerate phasing out and forced migrations.
The time to act on POTS replacement is now.
Why Are POTS Lines Being Phased Out?
The decision to sunset POTS lines is being accelerated by both regulatory actions and carrier strategies. The FCC has been steadily dismantling the regulatory framework supporting copper networks. Beginning with Technology Transitions (FCC Order 15-97) and continuing through multiple orders, carriers were allowed to retire copper infrastructure with minimal notice requirements.
In March 2025, the FCC issued four orders further reducing regulatory barriers to copper retirement. These rulings mean:
- Providers no longer need to offer a stand-alone voice replacement service when discontinuing copper, bundled alternatives are sufficient.
- Costly notice requirements have been waived, expediting retirement timelines.
- Businesses now have as little as 180 days to migrate once a discontinuance notice is issued.
The result: carriers are accelerating copper decommissioning nationwide.
Why Companies Still Depend on Plain Old Telephone Services (POTS)
Plain old telephone services (POTS) have been around in some form since 1876. By the mid-2010s, many businesses began reducing their dependency on analog copper wires, driven by the FCC’s deregulation of POTS phone lines and the rise of VoIP.
While most organizations migrated voice services to digital alternatives, POTS lines are still deeply embedded in physical operations. The biggest risk is that POTS endpoints often don’t live in IT’s world. They live in facilities, compliance, safety, or vendor-managed environments including safety-critical systems, like elevator phones, fire alarm panels, fax machines, and point-of-sale devices.
However, pushing off POTS replacement any longer could come with serious costs. These systems are often regulated, inspected, or tied to insurance requirements. Losing connectivity is not just inconvenient, it can trigger compliance issues, failed inspections, and operational shutdowns.
What Happens if You Don’t Replace POTS Lines?
For businesses that try to hold on to POTS lines, the reality is harsh:
- Exploding costs – Rates are rising dramatically, with some states already over $2,700 per line.
- Declining support – As carriers withdraw resources, repair times lengthen, and service quality declines.
- Regulatory and safety risks – Without functioning emergency lines (e.g., fire panels, elevators), businesses can lose their Certificate of Occupancy and even be forced to close until compliance is restored or pay for fire marshals on-site at $200+ per hour.
Preparing for the Transition: A 4-Step Plan
It isn’t just analog phone lines going away. Copper retirement impacts critical infrastructure across industries. Businesses must act now before carrier discontinuation notices arrive.
These four steps can help your organization plan and stay ahead of the copper sunset:
Step 1: Inventory all POTS-dependent systems
You cannot migrate what you cannot see.
Start by identifying:
- Locations
- Line counts
- Endpoint types
- Vendors supporting each system
- Whether the system is life-safety or compliance-driven
Tip: Many organizations discover they have far more analog lines than expected.
Step 2: Map compliance and regulatory dependencies
Not all lines are equal.
Some systems are tied to:
- Fire codes
- Elevator regulations
- Local inspection schedules
- Insurance requirements
- Public safety and emergency calling mandates
This step determines which systems must be prioritized and which solutions must meet specific reliability and backup standards.
Step 3: Evaluate and test replacement options
A replacement must be validated in the real world, especially for life-safety systems.
Testing should include:
- Dialing behavior
- Signaling
- Failover scenarios
- Battery backup behavior
- Vendor and inspector acceptance
Step 4: Plan procurement and deployment at scale
Once a carrier notice arrives, supply chain delays become a real threat.
Organizations should work with a vendor proven to support:
- Hardware deployment
- Professional installation
- Replacement connectivity
- Project management resources
What Are Alternatives to POTS Lines?
As carriers accelerate copper retirement, businesses must replace POTS lines with alternative solutions that meet both operational and regulatory requirements. Common alternatives include:
- Cable-based voice services – Cable providers offer voice replacements, but these solutions often lack sufficient battery backup and reliability. In many jurisdictions, cable voice does not meet compliance standards.
- Generic VoIP solutions – Standard VoIP works well for office phones but relies on local internet connectivity, creating a single point of failure during outages.
- Cellular-only adapters – Some cellular-based replacements provide basic analog connectivity, but many lack proactive monitoring, multi-carrier redundancy, and extended battery backup.
- Purpose-built POTS replacement solutions – Purpose-built solutions are designed specifically to replace copper POTS lines while maintaining compatibility with legacy and safety systems. These platforms use digital VoIP technology while delivering an analog POTS handoff.
Only purpose-built POTS replacement solutions provide the resilience, monitoring, and scalability required as copper networks are permanently shut down.
MetTel’s POTS Transformation Solution
MetTel offers the industry’s most proven alternative: POTS Transformation. Designed for large-scale, complex environments, MetTel’s POTS in a Box (PIAB) solution supports the full range of legacy telecom and safety/security systems, while providing:
- 30%+ cost savings immediately and year-over-year
- Dual SIM failover with 4G/5G connectivity and multi-carrier access
- Up to48-hour battery backup (on select models) and auto-restart for resilience
- 24/7 monitoring through the MetTel Portal
- Nationwide deployment expertise – with successful projects at Extra Space Storage and USPS (17,000+ sites), resulting in MetTel winning the USPS 2024 Supplier Excellence Award
MetTel has deployed more POTS replacements to enterprise and federal agencies than any other provider in the U.S., with the scale, expertise, and infrastructure to keep your business running without disruption.
Why enterprises choose MetTel
MetTel combines:
- A multi-carrier “supernetwork”
- Intelligent automation
- Proven experience supporting life-safety systems
- Rapid delivery capabilities under compressed carrier timelines
For organizations with hundreds or thousands of locations, this managed model reduces risk, shortens timelines, and prevents disruptions.
MetTel’s POTS Transformation Solution
MetTel offers the industry’s most proven alternative: POTS Transformation. Designed for large-scale, complex environments, MetTel’s POTS in a Box (PIAB) solution supports the full range of legacy telecom and safety/security systems, while providing:
- 30%+ cost savings immediately and year-over-year
- Dual SIM failover with 4G/5G connectivity and multi-carrier access
- Up to48-hour battery backup (on select models) and auto-restart for resilience
- 24/7 monitoring through the MetTel Portal
- Nationwide deployment expertise – with successful projects at Extra Space Storage and USPS (17,000+ sites), resulting in MetTel winning the USPS 2024 Supplier Excellence Award
MetTel has deployed more POTS replacements to enterprise and federal agencies than any other provider in the U.S., with the scale, expertise, and infrastructure to keep your business running without disruption.
Why enterprises choose MetTel
MetTel combines:
- A multi-carrier “supernetwork”
- Intelligent automation
- Proven experience supporting life-safety systems
- Rapid delivery capabilities under compressed carrier timelines
For organizations with hundreds or thousands of locations, this managed model reduces risk, shortens timelines, and prevents disruptions.
Act Now to Avoid Service Disruptions
POTS lines are going away, and the FCC, AT&T, and Lumen announcements make one thing clear: the countdown clock on copper has entered its final phase. Waiting exposes your organization to soaring costs, service outages, and regulatory compliance risks.
MetTel can help you transition seamlessly with a turnkey solution. Contact us today to learn how to protect your business from copper retirement before it disrupts your operations.
Frequently Asked Questions
What is copper retirement?
Copper Retirementis the phase out of legacy copper POTS lines by incumbent local exchange carriers (ILECS). As copper infrastructure is decommissioned, businesses must migrate from their old copper lines to modern, IP-based alternatives to avoid any disruptions.
What is plain old telephone service?
Plain Old Telephone Service (POTS) refers to traditional copper landlines that have been used for telephone service and other critical communications systems like fire alarms, elevators and fax machines. The phase out of copper POTS networks has been accelerating with more modern alternative solutions available.
Are plain old telephone service lines still available?
Traditional POTS lines are becoming increasingly difficult to procure and service with recent carriers and the FCC moving to accelerate the transition away from copper lines. Carriers continue to issue notices with increasing frequency inclusive of grandfathering, meaning no new lines or line changes, and permanent discontinuance. The window for this technology is rapidly closing which is why businesses should consider POTS Transformation away from copper POTS lines as soon as possible.
What are POTS phone lines used for?
Examples of plain old telephone service lines include traditional landline phones used in homes and businesses that connect directly to the telephone network via copper wires. POTS landline phone services are also found in emergency lines and alarm systems, including burglar and fire alarms, elevator phones, and other critical communication systems. Traditional fax machines and dial-up internet access still utilize POTS.
What are the advantages and limitations of POTS?
The advantages of POTS are:
- POTS is reliable, especially during power outages, as it operates independently of electricity. POTS service is used to dial 911 in case of emergency.
- POTS service has been used for over 100 years, so it is widely available and almost everyone is familiar with it.
The limitations of POTS are:
- Traditional POTS phone lines only support basic voice. Phone lines lack video calling, messaging or conferencing that are common with today’s VoIP technology.
- POTS lines can be more expensive to install and maintain due to the age of the copper lines and dwindling support. Monthly POTS rates continue to rise as carriers prepare for EOL.
How does POTS differ from VoIP or digital phone services?
- Technology: Analog signals are transmitted over copper wiring in a POTS phone line, meaning their call quality is lower than VoIP/digital, where higher-quality audio is transmitted digitally over IP networks (internet, LANs, fiber).
- Connectivity: POTS routes calls directly to the PSTN (public switched telephone network), while VoIP/digital routes calls over the data network as the transport mechanism.
- Features: POTS only provides basic calling, while VoIP/digital can support advanced unified communication features like video calls, chat, presence, collaboration, and more.
- Cost: POTS is more expensive for basic calling, while VoIP/digital service costs less (and offers more services) once the infrastructure is in place.
What is POTS Replacement?
POTS Replacement refers to the process of replacing outdated legacy copper telecom lines with modern, digital, IP-based solutions. The POTS replacement process begins with assessing a business’s specific communication needs, the existing infrastructure, and the types of systems they use, such as alarm systems or fax machines. Then, businesses choose from various POTS replacement technologies that utilize existing wireless networks to transmit data. MetTel offers POTS line replacement that digitizes your network and improves operations. We offer ongoing management for your POTS replacement, which includes 24/7 monitoring and support.
What does Analog to Digital Conversion mean?
Analog to Digital Conversion is the process of taking tangible inputs such as sound or sensor readings, and converting those signals into digital data that can be processed, stored, or transmitted electronically.
How does MetTel ensure the reliability of POTS replacement services?
MetTel ensures the reliability of POTS replacement services through our industry leading “POTS in a Box” adapter that routes calls via the data network, such as broadband, Wi-Fi, and LTE/5G cellular. It provides business continuity during primary network outages. Our private network is geographically dispersed with multi-layer redundancy for speed and security. We oversee the entire POTS replacement process, including 24/7/365 network operations center (NOC) monitoring and ongoing support. The service also comes with power backup to make sure calls can be made during a power outage.
What level of support does MetTel provide during and after POTS replacement?
MetTel provides professional installation of the “POTS in a Box” solution, which connects existing analog lines to a digital network, thereby maintaining functionality for essential services. After installation, we provide 24/7/365 monitoring and complete lifecycle management support.
What is the difference between grandfathering and discontinuance?
Grandfathering refers to the process of carriers notifying customers that they can no longer add new lines or move or change their existing POTS lines after a certain date. It is often the precursor to full line discontinuance which is the permanent shut down of copper lines by carriers. It is essential that customers begin preparation for migration of lines to digital solutions when these notifications come through because safety and business-critical systems including fire panels, security systems, elevators, fax machines, point of sale devices and more depend on them for essential connectivity and compliance.
