AT&T and Verizon Are Ending Copper Phone Lines: What Los Angeles Businesses Need to Do Before It's Too Late

What's Happening to Traditional Business Phone Lines

AT&T and Verizon have received FCC approval to retire their copper POTS (Plain Old Telephone Service) infrastructure across the country. This isn't a distant threat — it's actively happening now, with carriers issuing disconnect notices to business customers and requesting FCC permission to abandon copper service in specific areas.

If your business uses traditional analog phone lines, a fax machine running on a copper line, a security alarm system dialed in over POTS, or any equipment that depends on analog telephone service, your service is at risk of being discontinued — sometimes with as little as 180 days' notice.

Why the Carriers Are Doing This

Copper infrastructure is expensive to maintain and difficult to staff with the technicians who know how to service it. The technology is nearly 150 years old. Carriers have been subsidizing these networks for decades while investing in fiber and cellular, and the FCC has been systematically unwinding the regulations that required them to maintain copper service.

From a business standpoint, this makes sense for the carriers. For the businesses relying on that infrastructure, the timeline and process can be chaotic.

What Los Angeles Businesses Are Most at Risk

Not every business faces the same urgency. Here's who should be most concerned:

Businesses with analog fax lines: Fax machines, medical offices, law firms, and any business using physical fax over a copper line needs a replacement plan. Virtual fax solutions carry the same fax number over the internet.

Security and fire alarm systems: Many legacy alarm systems use POTS lines to communicate with monitoring centers. When the copper line goes away, so does your alarm's communication path. This is a compliance issue in regulated industries.

Elevator emergency phones: Building owners and property managers need to check whether elevator emergency communications run on POTS — this is a life-safety issue with code requirements.

Multi-line business phone systems: If you're still running a traditional PBX that routes calls over copper lines, you have a hardware replacement project ahead of you, not just a service switch.

Your Options for Replacing POTS Lines

The good news is that the replacements are generally better than what they're replacing — and often cheaper on an ongoing basis.

VoIP / SIP Trunking

Voice over IP delivers phone service over your internet connection rather than copper wires. SIP trunking replaces traditional phone lines with virtual lines that carry the same capabilities — including inbound and outbound calling, caller ID, and even fax — over your existing internet infrastructure.

For businesses with a functional phone system that just needs the underlying lines replaced, SIP trunks are the most direct replacement. You keep your numbers, keep your system, and swap out the copper.

Hosted PBX

If your phone system itself is aging out, this is the right moment to replace both the lines and the hardware with a cloud-hosted PBX. A hosted system runs entirely in the cloud — no on-premise hardware to maintain, no risk of the phone system going down when the power goes out, and features like auto-attendant, call forwarding, and voicemail-to-email that come standard.

Virtual Fax

For businesses using dedicated fax lines, virtual fax converts your fax number to a digital service. Incoming faxes arrive as email attachments. Outgoing faxes are sent from your computer. The fax number ports over, so your clients and partners notice nothing.

How to Plan the Transition Without Disrupting Your Business

The biggest risk in POTS replacement isn't the technology — it's the transition. Businesses that plan carefully avoid disruption. Here's what that looks like in practice:

Audit your copper-dependent equipment first. Make a list of every device or service running on an analog phone line: phones, fax machines, alarms, elevators, point-of-sale terminals, and any modems. Each one needs a migration path.

Don't wait for a disconnect notice. Planning a migration under deadline pressure is how mistakes happen and numbers get lost. The businesses that transition smoothly start the process before they're forced to.

Confirm your internet bandwidth can support voice. VoIP and SIP trunking run over your internet connection. A congested or unreliable internet circuit will cause call quality problems. If your internet is already under-provisioned, address that first.

Port your numbers before disconnecting anything. Number portability is protected, but the process takes time. Never cancel your copper service before confirming that your numbers have successfully ported to the new provider.

What TierZero Offers for POTS Replacement

We've been handling business telecommunications in Los Angeles since 1997 — which means we've been through every major technology transition this industry has seen. We offer SIP trunking, hosted PBX, and virtual fax as direct replacements for copper-based services, and we handle the number porting and migration as part of the process.

If you're not sure what you have or what you need, that's a normal place to start. Contact us and we'll do an assessment of your current setup and tell you exactly what a transition would look like for your specific situation — before you're staring down a disconnect notice.