Copper Phone Lines Are Retiring: Is Your Business Ready?
Quick question: how many old-school copper phone lines is your business still paying for, and what's actually plugged into them? If you had to think about it, you're not alone. You also may not have much time left to figure it out.
On November 2, the FCC released its latest count of traditional switched-access phone lines in the U.S.: about 13.5 million at the end of 2025, down from 15 million just six months before. Carriers are retiring copper as fast as the rules let them, and those rules got a lot looser this fall. If your fire alarm, elevator phone, fax machine or security panel still depends on a copper line, this is your wake-up call.
What's Changing
Earlier this year, the FCC voted to make it much easier for phone companies to shut down legacy copper "POTS" (plain old telephone service) lines. Under the old process, carriers had to file for approval, go through a public comment period, and could face challenges from state regulators. The March 2026 order removed most of those hurdles. Updated rules took effect on October 15, 2026, and a carrier's request to discontinue legacy service is now generally treated as approved 31 days after public notice.
For customers, notice can be as short as 90 days before the line goes dead.
The carriers are moving. AT&T reports it has already shut off copper service in more than 500 communities covering over 1.3 million locations, and its next wave of discontinuances is authorized to start on or after November 15, 2026, with more waves already scheduled through 2027. Verizon, Frontier, Lumen and CenturyLink have filed retirement notices of their own. Most carriers are aiming to finish between now and 2029.
What About Arizona?
Across much of Arizona, including the Phoenix and Tucson areas, legacy copper lines run through Lumen (the company behind CenturyLink). Industry trackers list Arizona as an active part of Lumen's copper retirement footprint. Retirements happen wire center by wire center, so two businesses across town from each other, or in different cities, can be on completely different timelines. The only reliable answer for your address comes from checking with your carrier, not from a news headline.
Why It Matters to a Small Business
Losing a regular desk phone line is annoying. Losing the line that nobody remembers is the real problem. Copper lines often quietly power the things you only notice when they fail:
- Fire alarm monitoring panels. If the line drops, your alarm may not reach the monitoring center. A disconnected life-safety line can hold up inspections or occupancy sign-off, and some businesses end up paying for fire-watch coverage until it's fixed.
- Elevator emergency phones. Same story: required, rarely tested, often on copper.
- Security and access control systems that dial out to a monitoring service.
- Fax machines and credit card terminals that still use a dial-up connection.
Carrier replacement options aren't always a perfect match, either. AT&T's replacement, for example, is its own LTE-based wireless voice service with up to 24 hours of battery backup. That may work fine for a desk phone, but it doesn't supply power down the line the way copper did, and life-safety equipment has to meet local code and your fire marshal's requirements.
There's an upside, though. Many businesses are paying for copper lines they don't use at all. One company highlighted by a telecom consultant cut its monthly POTS bill from about $20,683 to under $2,000 after auditing roughly 40 lines and disconnecting or migrating more than 20 of them. Your numbers will be different, but an audit almost always turns up something.
5 Steps to Take Now
- Inventory every phone line you pay for. Pull your last few phone bills and list each number. Then find out what each one connects to. If nobody knows, a technician can trace it.
- Flag the life-safety lines first. Fire alarm panels, elevator phones and monitored security systems go to the top of the list. Talk to your alarm company about approved replacements (often cellular or IP communicators) before a shutoff notice arrives.
- Check your address with your carrier. Ask directly whether your location is on a copper retirement schedule and when. Don't assume your neighbor's timeline is yours.
- Move your voice service to a modern phone system. A cloud-based business phone system (VoIP) gives you features copper never did: calls on your cell phone, auto-attendants, voicemail to email. Just make sure your 911 location information is set up correctly when you switch.
- Cancel what you don't need. Every unused line you find is money back in your budget each month.
The biggest mistake is waiting for the notice. Ninety days sounds like plenty, until you factor in alarm company schedules, permits and installers who get busier with every new wave of shutoffs. A plan you make now costs a lot less than an emergency fix later.
Get Ahead of the Copper Shutoff
Not sure what your copper lines are doing or how to replace them? Intelus Technology Group helps businesses across Arizona audit their phone lines and move to reliable, modern business phone systems. Contact us at intelusgroup.com for a no-pressure assessment.
