Navigating the Transition from POTS to VoIP: What You Need to Know for Your Fire Alarm & Security Systems

As the telecommunications industry rapidly shifts from traditional POTS (Plain Old Telephone Service) to modern VoIP (Voice over Internet Protocol), businesses across the Southeast are facing new challenges with their security and life safety systems. This migration, driven by the phasing out of copper-based phone lines in favor of fiber optics, offers cost-saving benefits but can disrupt essential services like fire alarm and security monitoring. At Preventia Security, serving customers in Tennessee, Georgia, Alabama, and Florida, we are committed to ensuring your transition is smooth and secure. Here’s how you can prepare your systems and avoid potential pitfalls.

Understanding the Shift: From POTS to VoIP

POTS lines, which have been the backbone of telecommunications for over a century, operate through dedicated copper wires, providing reliable, low-latency connections. These analog lines have traditionally connected fire alarm systems and other security devices to monitoring centers. However, as telecommunications carriers move to fiber optic networks, VoIP has become the new standard.

How VoIP Works: VoIP converts voice signals into digital data packets and transmits them over the internet. These packets are reassembled at the receiving end, allowing for smooth voice communication. However, unlike POTS, VoIP’s packet-based transmission can introduce delays, interference and compatibility issues, particularly with systems not designed for digital data.

The Impact on Fire Alarm Systems

For many businesses, fire alarm systems are still reliant on POTS lines for communication with central monitoring stations. VoIP’s digital nature can cause significant problems:

    1. Signal Integrity: VoIP can alter the format of alarm signals, making them unrecognizable to monitoring centers. Traditional fire alarm signals, designed for analog transmission, may not be effectively processed when converted to digital packets.  This can lead to false alarms or alarm signals being sent to wrong accounts through the monitoring center.
  • Communication Failures: When POTS lines are replaced with VoIP, it is common for fire alarm signals to fail in reaching the monitoring station, leading to compliance issues and safety risks.

Preparing for VoIP: Solutions to Maintain Connectivity

To ensure that your fire alarm and security systems continue to function seamlessly with VoIP, consider the following options:

Option 1: Managed Facility Voice Network (MFVN)

What is MFVN? MFVN is a specialized service designed to emulate the reliability of POTS while using modern fiber optic technology. It ensures that fire alarm signals are transmitted without alteration, maintaining compliance and reliability.


  • Simplicity: Your existing fire alarm setup can connect directly to MFVN lines without modifications.
  • Compliance: MFVN meets NFPA 72 Fire Code requirements, ensuring your system adheres to current safety standards.

Action Steps:

  • Check with your telecommunications provider about MFVN availability.
  • Schedule a test with your fire alarm system vendor to confirm proper signal transmission.

Option 2: Network/Cellular Communicator

What is a Network/Cellular Communicator? This device replaces the traditional POTS connection with dual communication paths: internet protocol and cellular connectivity like that of your cell phone. This method provides a robust backup system, ensuring that alarm signals are transmitted even if one path fails.


  • Reliability: Dual communication methods (internet and cellular) offer continuous monitoring even during internet outages.
    • Frequent Check-ins: Unlike POTS, which checks in once a day, network/cellular communicators can report to the monitoring center every few minutes, ensuring immediate detection of issues.
  • Cost Savings: Eliminating the need for POTS lines reduces costs, potentially saving up to $1,000 annually.

Action Steps:

  • Consult with your fire alarm or security provider to assess compatibility and installation requirements.
  • Ensure your system alarm panel settings are adjusted or upgraded as needed for the new communicator.

Challenges and Solutions for VoIP Implementation

When integrating VoIP into your security infrastructure, be mindful of the following challenges and their solutions:

  1. Power Supply Concerns:
    • Problem: VoIP devices require power from your local electricity, unlike POTS lines that are powered by the telephone network.
    • Solution: Use Uninterruptible Power Supplies (UPS) to keep your VoIP devices operational during power outages.
  2. Hardware Failures:
    • Problem: Modems and routers can malfunction, leading to loss of connectivity.
    • Solution: Regularly inspect and replace faulty hardware, and ensure all cables are secure.
  3. Internet Connectivity Issues:
    • Problem: Internet outages can disrupt VoIP communication.
    • Solution: Consider a cellular backup to maintain alarm communication during internet failures.
  4. Digital Signal Instability:
    • Problem: VoIP’s dependency on internet traffic can result in lost or delayed alarm signals.
    • Solution: Invest in Cellular Alarm Communications to provide a reliable alternative to VoIP.

Moving Forward: Ensuring a Secure Migration

As VoIP becomes the norm, it is crucial to proactively adapt your fire alarm and security systems to avoid disruptions. At Preventia Security, we offer expert guidance and solutions tailored to your needs, ensuring your systems remain compliant and effective. Whether you choose MFVN, a network/cellular communicator, or a combination of both, we are here to help you navigate the transition smoothly.

Contact Us: If you’re facing the challenges of migrating from POTS to VoIP, or simply want to future-proof your security systems, reach out to Preventia Security. We’re dedicated to providing reliable, modern security solutions for our customers in Tennessee, Georgia, Alabama, and Florida. Let us help you stay secure and ahead of the curve.

For more information on how we can assist with your VoIP migration, or to schedule a consultation, visit Preventia Security or call us at 877.720.2527. At Preventia, we truly believe, we exist to help people sleep at night and get the most out of their day.