What Is a Copper Network?
A copper network is a telecommunications infrastructure built on physical copper wire that transmits electrical signals between endpoints. For more than a century, copper networks formed the backbone of telephone service across the United States and most of the developed world. Every building connected to traditional landline telephone service has a copper network connection running from the premises to a nearby telephone exchange, commonly called the central office.
The specific type of copper network used for telephone service is known as the local loop — the pair of copper wires that runs from the telephone exchange to the customer premises. This copper pair carries the analog electrical signal of a POTS (Plain Old Telephone Service) line. The same copper network infrastructure also carries DSL broadband service in many areas, using higher-frequency signals on the same wire alongside the voice signal.
Copper networks have two defining characteristics that made them foundational for life-safety systems. First, they are loop-powered: the telephone exchange supplies a small electrical current down the copper wire, meaning the line continues to function during a building power outage. Second, they provide an analog electrical interface that fire alarm panels, elevator phones, and security systems were designed and certified to use. These two properties are why replacing a copper network connection for life-safety applications requires more planning than simply switching to VoIP.
Despite their reliability, copper networks are expensive to maintain. The physical plant — conduit, cable, splice cases, and exchange equipment — requires ongoing investment, and the number of customers still using traditional copper service has declined sharply as businesses and consumers migrate to fiber, cable, and cellular alternatives. This economic reality is driving the copper network shutdown now accelerating across the United States.
Dates that Will Reshape the U.S. Copper and POTS Wireline Landscape
These months mark key moments in AT&T’s retirement of its legacy copper POTS network, a transition that has been accelerated by recent policy updates from the Federal Communications Commission (FCC).
October 2025: The Service Freeze
Beginning in October 2025, AT&T will stop accepting new orders or processing “adds, moves, or changes” for copper-based services. As Light Reading reports, this move signals that the company is winding down support for traditional copper infrastructure and focusing on fiber and fixed wireless networks.
“Right now we are operating two parallel wireline networks: our copper network and our modern fiber network. …and the copper network is very inefficient.”
Susan Johnson, Senior Executive Vice President for Wireline Transformation & Supply Chain
For organizations still using copper-based POTS lines, this freeze is a clear sign that time has run out to migrate. Many building systems, including fire alarms, elevators, security panels, and fax lines, still depend on copper for connectivity. Once AT&T stops maintaining their network, those services will need a replacement solution to stay operational and code-compliant.
June 2026: The Shutdown
The next critical date is June 2026, when AT&T will begin decommissioning copper facilities in about 500 wire centers nationwide, roughly 10 percent of its footprint. Fierce Network notes that AT&T has received FCC approval for this first phase of shutdowns, marking one of the largest legacy network retirements in decades.
Maintaining copper is costly; AT&T spends nearly $6 billion annually to keep its legacy network running. With fewer than 3 percent of customers still on copper, it is no surprise that AT&T is accelerating its shift to modern, broadband-based services.
The FCC’s Role in Copper Network Retirement Acceleration
This faster timeline is possible in part because of FCC actions taken in March 2025. The Commission adopted new rules that streamlined the copper retirement process, allowing carriers to move more quickly. As Broadband Breakfast reported, the FCC removed the requirement that providers must offer standalone voice options before retiring copper, and it simplified the Section 251 network change notification process, reducing the red tape that once delayed network upgrades.
These regulatory updates have allowed operators to retire outdated infrastructure while ensuring customers continue to have access to reliable broadband and voice services. Full details of the FCC’s policy changes are available on its Wireline Network Changes page.
Balancing Speed and Reliability during Copper Retirement
While the FCC’s policy changes have accelerated modernization, they also raise questions about how to protect customers who still rely on copper-based systems. Regulators in states such as California have expressed concern about rural access and consumer protection. The FCC’s March order seeks to strike a balance between those concerns and the need to modernize aging infrastructure.
“We are streamlining the process for retiring decades-old copper networks so that providers can transition consumers and their resources to new, high-speed infrastructure.”
FCC Chairman Brendan Carr, March 20, 2025
In this environment, proactive planning is essential. Businesses should identify all systems that depend on copper lines, verify that they meet current fire and life-safety codes, and partner with a trusted provider that understands both the regulatory and technical requirements for compliant POTS replacement.
Looking Ahead
The next 18 months will mark a decisive shift in the telecommunications landscape. With October 2025 ending new copper service activity and June 2026 initiating the next major shutdown, the countdown to full shutdown moves to warp speed for legacy POTS lines across the country.
Supporting Customers Through the Copper Shutdown
At MarketSpark, we are uniquely focused on helping businesses successfully navigate this shift away from copper. Our managed POTS replacement platform enables organizations to replace legacy phone lines with a secure, wireless solution that supports critical life-safety and business systems such as fire alarms, elevator lines, emergency phones, and building access systems.
The most critical step is identifying every POTS line across all business locations and documenting what each one is connected to. Fire alarm panels, elevator phones, and security systems connected to copper lines cannot simply be redirected to a standard VoIP connection — they require a purpose-built managed POTS replacement solution that replicates the analog electrical interface those devices expect. Businesses that try to replace copper network connections with consumer VoIP risk failed alarm inspections, regulatory penalties, and life-safety compliance gaps.
For multi-site organizations, the copper network shutdown is a program management challenge as much as a technical one. Carrier retirement timelines vary by market, and receiving a disconnection notice with only 180 days of lead time is not uncommon. Organizations that begin auditing and planning now — before notices arrive — maintain control over the transition timeline and avoid the rushed, costly decisions that come with reactive migrations.
As AT&T and other carriers phase out copper, MarketSpark’s fully managed, code-compliant solution allows enterprises and property managers to modernize safely, without sacrificing performance, reliability, or compliance. We deliver nationwide coverage, proactive monitoring, and turnkey installation designed to simplify the transition for multi-location and enterprise environments.
Our mission is to make the copper sunset an opportunity rather than a disruption. By moving to modern wireless and IP-based technology, organizations can reduce costs, improve reliability, and future-proof their operations against further network changes.