The copper phone lines that have connected alarm systems to monitoring centers for decades are quietly disappearing. Carriers are phasing these lines out, and the ones that remain are getting expensive. Many clients now pay $200 to $300 a month for a single local line, plus traffic charges. If your fire or burglar alarm still reports over one of these lines, this issue is worth a few minutes of your time.

Key takeaways

• Copper phone lines (POTS) are being phased out, and the lines that remain are getting expensive.

• The FCC no longer requires carriers to maintain POTS, so providers can drop it without notice.

• VoIP is fine for voice but is not reliable for alarm communication.

• Most alarm panel manufacturers do not support VoIP.

• The issue is the phone technology, not your alarm system.

Why the copper is going away

The Federal Communications Commission (FCC) deregulated standard copper phone lines, known as POTS, or Plain Old Telephone Service. That change removed the requirement for phone companies to maintain them. As a result, major providers like AT&T and Verizon can move away from POTS lines without notifying customers. The reason is simple. The cost of keeping aging copper infrastructure running keeps climbing, and carriers would rather retire it.

Enter VoIP, and a new problem

As providers transition away from copper, the most common replacement is Voice over Internet Protocol, or VoIP. VoIP works well for the one thing it was built for, talking to people. It is not reliable, and not recommended, for fire and burglar alarm communication with a monitoring center.

Most major alarm panel manufacturers do not support VoIP at all.

Why VoIP and alarms do not mix

The problem comes down to what each technology was designed to carry. VoIP is built to transmit voice. Alarm systems rely on data. That mismatch shows up quickly.

VoIP is built for voice. It compresses and decompresses audio, prioritizes how speech sounds, and tolerates small gaps a caller would never notice.

Alarm panels are built for data. They send precise signal tones, need every tone received intact, and expect a clean, consistent connection.

When you put an alarm signal on a VoIP line, the same compression that makes a call sound fine can scramble the tones a panel sends. Monitoring centers may not interpret those signals correctly, and a critical alarm could be delayed or missed. That is why most panel manufacturers do not support VoIP.

This is not your alarm’s fault

This is not a problem with your alarm system. It is a limitation of the telecommunications technology the system was originally built to use. Your panel is doing exactly what it was designed to do. The network underneath it is what changed.

The lines are going away whether we like it or not. The good news is that keeping your property protected stays simple, once your alarm is talking over the right connection.

Not sure how your alarm reports today? Our Suburban Technology team can review your system and move it to a modern connection built for alarm data. We have options to add cellular communications to your fire and or security panels. Reach out to us for a cell dialer quote at (920) 739-5156.