POTS Line Replacement: Options, Costs, and How to Replace Copper Lines

The traditional copper phone lines that have run businesses for decades – the POTS lines – are being retired. Carriers have been approved to stop maintaining copper, prices on the lines that remain keep climbing, and replacement parts are getting scarce. If your business still runs analog lines for phones, fax, elevators, or alarms, you need a POTS line replacement plan. Here’s what a POTS line is, why it’s going away, your replacement options, and what each one costs.

What is a POTS line?

POTS stands for “plain old telephone service” – the standard analog phone line delivered over copper wire by your local carrier. For most of the last century it was simply how a phone worked: it carried voice, drew its own power from the phone company (so it kept working in a blackout), and supported anything analog you plugged into it – fax machines, credit card terminals, elevator emergency phones, fire and burglar alarm dialers, gate intercoms, and modems.

That reliability is exactly why so many critical systems still sit on POTS lines today. It’s also why replacing them takes more thought than just cancelling the line.

Why carriers are replacing POTS lines

The copper network is being retired, and it’s happening on a deadline. A few forces are pushing it:

• Regulatory change. The FCC removed the rules that required carriers to keep maintaining copper and offering POTS at regulated rates, clearing the way for them to stop.
• Carrier copper shutdowns. Major carriers are actively retiring copper. AT&T, for example, has notified customers that copper landline service will be discontinued in affected areas on or after a set date – read our breakdown in Is AT&T Business Phone right for your business?
• Cost. As copper is retired, the lines that remain are repriced steeply – it’s common to see POTS lines that once cost $30-$50/month climb past $100-$300+ per line.
• Aging infrastructure. Copper plant and replacement parts are increasingly hard to source, so repairs take longer and outages last longer.

POTS line replacement options

“Replacing” a POTS line means moving whatever was on it to a modern equivalent. There are three main paths, and most businesses end up using a mix depending on what each line does.

1. VoIP (voice over internet)

Your phones move to a digital system that runs over your internet connection. This is the right answer for desk phones and your main phone system: you keep your numbers, gain modern features (voicemail-to-email, auto attendants, mobile and desktop apps), and usually cut your monthly cost. The catch is that plain VoIP depends on your internet – which is why a good installation pairs it with failover (below).

2. Cellular / wireless POTS replacement

A small device replaces the analog line with a cellular connection, presenting the same analog jack your existing equipment already uses. This is ideal for lines that have to stay analog and can’t easily move to VoIP – elevator phones, fire alarm panels, and similar – because the device keeps the old equipment working while removing the copper. It also keeps working when the building’s internet is down, since it rides the cellular network.

3. Analog adapters on a managed system

For fax machines, credit card terminals, and other analog devices, an analog telephone adapter (ATA) connects them to your VoIP system so they keep functioning without a dedicated copper line. This consolidates odd analog lines onto one managed platform.

POTS line replacement cost

The real comparison isn’t replacement vs. free – it’s replacement vs. the rising cost of keeping copper. As carriers retire copper, a single legacy POTS line commonly runs well over $100/month, and sometimes far higher. A VoIP line or a cellular POTS-replacement device typically costs a fraction of that per line, plus the equipment. The exact number depends on how many lines you have, what’s on them, and whether any need to stay analog. (We’ll quote your specific lines.)

The lines most businesses get wrong

Desk phones are the easy part. The risk in a POTS replacement is the life-safety and compliance lines that quietly sit on copper:

• Elevator emergency phones are required by code to reach help, and they have specific testing requirements. They can’t simply be unplugged from copper – they need a replacement that’s installed and verified. See how we handle elevator emergency phone line replacement.
• Fire and burglar alarm dialers communicate over the line to a monitoring center. A botched migration can silently break monitoring, so these must be cut over and tested.
• Fax and payment terminals need an analog adapter configured correctly or they stop sending.

This is the part carriers and DIY kits leave to you – and it’s exactly where a local installer earns its keep.

The locally installed POTS replacement: Phonewire

Phonewire replaces copper POTS lines for businesses end to end. We inventory every analog line you run, recommend the right replacement for each (VoIP, cellular POTS replacement, or analog adapter), install it on-site, and test it – including the elevator and alarm lines that carry the most risk. You keep your numbers, your fax and terminals keep working, and your phones gain modern features plus VoIP with cellular data network failover so they stay up when the internet drops. For your main system, see our small business phone systems page.

POTS line replacement FAQ