POTS Line Replacement: What Michigan Businesses Need to Do Before 2027
- Craft Enterprises
- 3 days ago
- 10 min read
POTS line replacement is no longer a future planning item for Michigan businesses. It is an active requirement happening right now. AT&T stopped accepting new POTS orders across 19 states including Michigan as of October 15, 2025 and began decommissioning copper infrastructure in approximately 500 wire centers nationwide starting June 2026. For multi-location businesses in Macomb County, Metro Detroit, and Southeast Michigan still running alarm systems, elevator emergency phones, fire panels, and fax lines on copper, the transition window is closing.
The businesses that plan proactively are choosing their replacement solutions on their own timeline at market rates. The businesses that wait are facing forced migrations under time pressure with limited vendor options, supply chain delays, and rates on remaining copper lines that have already jumped 200 to 400 percent in many markets.
This guide covers what is happening, which systems are affected, what the replacement options look like, and what Michigan businesses need to do right now.
If you are not sure how many POTS lines your business is currently paying for, our telecom audit checklist for multi-location businesses covers exactly how to inventory every service across every location.
Craft Enterprises is based in Shelby Township and manages POTS line replacement for multi-location businesses throughout Macomb County, Oakland County, and Southeast Michigan. We inventory every copper line across all your locations and manage the full migration process on your behalf.
What Is Happening to POTS Lines and Why It Matters for Michigan Businesses
Plain Old Telephone Service, the traditional copper-wire telephone network, is being retired. AT&T is the dominant copper network operator in Michigan and its retirement timeline is the one that matters most for Southeast Michigan and Macomb County businesses.
The economics driving this are straightforward. AT&T spends nearly $6 billion annually maintaining its legacy copper network, yet fewer than 5 percent of customers still use these services. In March 2025, the FCC adopted new rules streamlining copper retirement procedures, eliminating the requirement for providers to offer standalone voice alternatives and significantly shortening network change notification periods. Those regulatory changes removed the last meaningful barrier to accelerated copper retirement.
The result is a retirement process moving faster than most Michigan businesses realize. New POTS orders stopped in October 2025. Physical copper infrastructure decommissioning began in June 2026. AT&T aims to have no customers on copper in wireless-first areas by the end of 2027, with full copper retirement targeting 2029 in fiber areas.
For businesses in Macomb County and Southeast Michigan, this is not a distant problem. It is happening in your market right now, and the lines being retired include the ones quietly powering your building systems.
The Timeline Michigan Businesses Cannot Afford to Ignore
October 2025: AT&T stopped accepting new orders, moves, or modifications for copper POTS services across Michigan and 18 other states. This means no new lines can be ordered and no changes can be made to existing copper services.
June 2026: AT&T began physically decommissioning copper facilities across approximately 500 wire centers nationally. This is not a rate increase announcement. This is actual copper infrastructure coming offline.
End of 2027: AT&T targets complete copper retirement in wireless-first areas. Many portions of Michigan, including rural Macomb County communities and secondary markets outside the Detroit urban core, fall into this category.
2029: AT&T targets full copper retirement in fiber-served areas, including much of Metro Detroit and Macomb County where fiber buildout is ongoing.
The practical implication is that any Michigan business still on copper POTS needs a replacement plan in place and implementation underway before the end of 2026 to avoid forced migration under emergency conditions.
Which Michigan Business Systems Run on POTS Lines
Most Michigan businesses know their main business phone lines. What they consistently miss are the systems that run on copper without anyone actively thinking about them as phone lines.
Fire alarm monitoring connections are among the most common. Local fire codes in Michigan require fire alarm systems to have a monitored communication path to a central monitoring station. For decades, that path was a copper POTS line. These lines are typically invisible on a telecom invoice buried in a list of line items without obvious identifiers.
Elevator emergency phones are required by Michigan building codes and run on dedicated phone lines in every elevator cab and machine room. These are POTS connections. When copper infrastructure in a building goes offline, these phones go with it, creating both a safety issue and a compliance violation.
Security and alarm panel dialers communicate with monitoring stations over copper lines. Most commercial alarm systems installed before 2018 use a traditional phone line dialer as their primary or backup communication method.
Fax lines at professional services firms, healthcare organizations, and administrative offices across Macomb County and Metro Detroit are almost universally still on copper.
Point-of-sale backup lines at retail locations. Some POS systems maintain a copper backup line for payment processing during internet outages.
For a multi-location Michigan business, the realistic picture is two to eight POTS lines per location across these categories, many of which have never been formally inventoried.
What POTS Line Replacement Is Already Costing Michigan Businesses
The cost pressure from POTS retirement is not coming in 2027. It arrived in 2025 and accelerated through 2026.
POTS rates for businesses still on copper have increased 200 to 400 percent in many Michigan markets as AT&T reduces maintenance investment in copper infrastructure and reduces competitive pressure on pricing. Lines that cost $40 to $50 per month in 2020 are running $100 to $300 per month in many Macomb County markets. In some cases with specialty copper services, rates have exceeded $2,700 per line per month where carriers are actively pushing businesses off copper.
For a 10-location Michigan business with an average of four POTS lines per location, that represents 40 active copper lines. At an average current rate of $150 per line per month, that is $6,000 per month in POTS costs alone. The digital replacement options for those same 40 lines run $20 to $60 per line per month depending on the solution chosen. The monthly savings on POTS replacement alone, excluding any other audit findings, can reach $3,600 to $5,200 per month for a business that has not yet addressed copper retirement.
Michigan businesses that have not reviewed their POTS inventory in the past 12 months are almost certainly paying at above-market rates for lines that can be replaced at a fraction of the cost. For more context on how billing errors and pricing drift affect Michigan businesses specifically, see our guide on how Michigan multi-location businesses are reducing telecom costs in 2026.
A 10-location Michigan business with 40 POTS lines is paying up to $6,000 per month on copper at current 2026 rates. The digital replacement for those same 40 lines runs $800 to $1,800 per month. That is a $4,200 to $5,200 monthly savings opportunity sitting in lines most businesses have never formally reviewed.
The POTS Line Replacement Options Available to Michigan Businesses
Option 1: Cellular POTS Replacement
Cellular POTS replacement devices, often called POTS in a Box solutions, are the most widely recommended option for alarm lines, elevator phones, and fire panel connections. These devices plug into existing building wiring and provide an analog phone interface that the connected equipment recognizes as a normal copper line, while actually communicating over 4G LTE or 5G cellular networks.
The advantages are compatibility with existing equipment and code compliance for life-safety systems. Monthly costs run $20 to $45 per line, significantly below current POTS rates in the Michigan market. Hardware costs for the replacement devices range from $100 to $400 per unit depending on the specific solution.
Option 2: VoIP and SIP Trunking
For standard business voice lines currently on POTS, VoIP and SIP trunking are the standard digital replacement. These deliver business phone service over internet connections at significantly lower cost than copper lines. Monthly costs for a managed VoIP line run $15 to $35 per line on business plans.
For Michigan businesses already working with Craft Enterprises on broader telecom optimization, VoIP migration can be coordinated as part of the same engagement to avoid managing it as a separate project.
Option 3: Fiber-Based Digital Lines
Where AT&T Business Fiber, WOW! Business, or other fiber providers have coverage in Macomb County and Southeast Michigan, fiber-based digital line services replace copper with a modern infrastructure at competitive pricing. This is the preferred long-term solution for locations where fiber availability has expanded in the past two to three years.
Option 4: Fixed Wireless Alternatives
For Michigan business locations in areas where fiber has not reached and cellular POTS replacement is preferred for voice service, AT&T Phone Advanced and similar fixed wireless services provide an IP-based voice replacement. These are appropriate for locations in secondary Macomb County markets where fiber buildout is still in progress.
How to Find Every POTS Line Your Michigan Business Is Paying For
The first step in any POTS replacement plan is knowing exactly how many copper lines you have and where. This sounds straightforward. In practice, for multi-location Michigan businesses, it almost never is.
Pull 12 months of invoices from AT&T and any other carriers serving your Michigan locations. Look for line items labeled POTS, analog line, copper service, POTS access, POTS equivalent, or any variation of plain old telephone service. Also look for items labeled simply as phone line or line with a per-line monthly charge that is not a SIP or VoIP service.
Cross-reference every identified line against your current location list and building systems inventory. Match each line to the system it serves, fire panel, elevator, alarm, fax, or voice.
Flag every line serving a system that has been upgraded since the line was provisioned.
Alarm systems that have been upgraded to IP-based monitoring, for example, may no longer need the copper dialer line that was originally provisioned for them.
For Michigan businesses that have never done this inventory, working through this process with a telecom consulting firm that knows the Michigan carrier landscape significantly speeds the process and ensures nothing is missed.
For multi-location Michigan businesses, inventorying POTS lines across every location while matching each line to the system it serves is a process that benefits significantly from a consulting firm that knows the Michigan carrier landscape and the specific AT&T retirement timeline for Macomb County and Southeast Michigan.
The Michigan-Specific Considerations for POTS Replacement
Michigan building and fire codes have specific requirements for alarm monitoring communication paths. Any POTS replacement for fire alarm systems in Michigan must maintain code compliance and in many cases requires sign-off from the local Authority Having Jurisdiction. This is not a DIY process for fire panel communication lines. The replacement solution must be validated for life-safety use.
AT&T's copper footprint in Macomb County and Southeast Michigan is significant. As the dominant incumbent carrier throughout the region, AT&T's retirement timeline directly affects the majority of Michigan businesses still on POTS. The June 2026 decommissioning phase targeted approximately 10 percent of AT&T's national footprint but is concentrated in markets where copper retirement is commercially viable, which includes portions of Metro Detroit's suburban markets.
Michigan businesses in Shelby Township, Sterling Heights, Clinton Township, and Utica that have not received formal retirement notices yet should not interpret the absence of a notice as an absence of urgency. Notice periods are now as short as 90 days under the FCC's 2026 regulatory changes, meaning that by the time a notice arrives, there may not be enough time for a smooth planned migration.
What Happens If Michigan Businesses Wait Too Long
The consequences of unplanned POTS retirement fall into three categories, all of which are more expensive than a planned migration.
Service interruption is the most immediate risk. When a copper wire center is decommissioned, any service still running on that infrastructure goes dark. For fire panel monitoring lines, this creates a compliance issue immediately. For elevator emergency phones, it creates a safety and liability issue. For alarm dialers, it leaves the location unmonitored.
Emergency migration costs. Businesses that migrate under time pressure pay significantly more for hardware, installation, and expedited service than businesses that plan migrations on their own schedule. Supply chain constraints for POTS replacement hardware are real during peak retirement periods.
Compliance exposure. Michigan building codes do not provide a grace period for life-safety system communication failures caused by carrier network retirement. The building owner carries the compliance responsibility regardless of why the line went down.
How Craft Enterprises Helps Michigan Businesses With POTS Line Replacement
Craft Enterprises manages POTS line replacement as part of the broader telecom consulting engagement for Michigan multi-location businesses. We inventory every POTS line across all locations, identify which systems each line serves, assess which replacement technology is appropriate for each use case, and manage the migration process on your behalf including coordination with building system vendors and carriers.
For Michigan businesses, this means a Shelby Township-based firm with direct knowledge of the AT&T copper retirement timeline in Macomb County and Southeast Michigan managing the process rather than a national firm applying generic guidance to a local situation.
The starting point is a strategy call to discuss your current POTS exposure and what a migration engagement covers for your specific environment.
Frequently Asked Questions: POTS Line Replacement for Michigan Businesses
What is a POTS line and why are they being replaced?
POTS stands for Plain Old Telephone Service, the traditional copper-wire telephone network that has powered business phone lines, alarm systems, elevator phones, and fax connections for decades. Carriers including AT&T are retiring copper infrastructure because maintenance costs are unsustainable with fewer than 5 percent of customers still using these services. AT&T stopped accepting new POTS orders in October 2025 and began physical decommissioning in June 2026.
How many POTS lines does a typical Michigan multi-location business have?
Most Michigan multi-location businesses have two to eight POTS lines per location when fire panel connections, alarm dialers, elevator phones, and fax lines are included in the count. Many businesses that believe they have no POTS lines discover several during a formal inventory because these lines serve building systems rather than business operations and are rarely tracked centrally.
What does POTS line replacement cost for Michigan businesses?
Cellular POTS replacement solutions, the recommended option for alarm and life-safety lines, run $20 to $45 per line per month with hardware costs of $100 to $400 per unit. VoIP replacement for standard voice lines runs $15 to $35 per line per month. Both are significantly below current POTS rates in the Michigan market, which have increased 200 to 400 percent since 2020.
What happens to my fire alarm system when POTS lines are retired?
Fire alarm monitoring systems that currently use copper POTS lines for communication will lose their monitoring connection when the copper line is retired. Michigan building codes require a compliant monitoring communication path, so POTS retirement creates an immediate compliance issue for fire alarm systems that have not been migrated to a digital alternative. The replacement solution must be validated for life-safety use and in many cases requires approval from the local Authority Having Jurisdiction.
How quickly do Michigan businesses need to act on POTS replacement?
Businesses in Michigan that have not started a POTS inventory and replacement plan should start immediately. AT&T's notice period is now as short as 90 days under FCC rules adopted in 2026, meaning a retirement notice can arrive with very limited time for a planned migration. Businesses that start the process now have time to choose the right replacement technology, avoid supply chain delays, and complete migrations without service disruption.
Can Michigan businesses negotiate better POTS replacement pricing?
Yes. Multi-location Michigan businesses that consolidate their POTS replacement across all locations into a single engagement negotiate significantly better pricing on both the replacement hardware and the ongoing monthly service rates than businesses that replace lines one at a time as retirement notices arrive. Craft Enterprises manages this consolidation as part of the broader telecom consulting engagement for Michigan clients.
Related reading: How Michigan Multi-Location Businesses Are Reducing Telecom Costs in 2026 | Why Your Business Phone Bill Keeps Going Up | Ghost Lines in Business Telecom: What They Are and How Much They Are Costing You