For decades, Plain Old Telephone Service (POTS) was the backbone of critical communications, supporting fire alarm panels, elevator emergency lines, and intrusion systems. It was once considered the most reliable infrastructure available.
In 2026, that assumption no longer holds. Escalating costs, aging copper networks, and aggressive telecom transition strategies are fundamentally changing the POTS landscape. What was once dependable is now expensive, unpredictable, and increasingly unsuitable, especially for life-safety applications.
Let's examine what's truly happening and what's at stake for businesses that delay action.
POTS is the traditional analog voice network delivered over twisted-pair copper wiring, part of the broader Public Switched Telephone Network (PSTN). Because it carried its own power and operated independently of building electronics, POTS earned a reputation for "five-nines" reliability and became the default communication path for life-safety systems, including fire alarm communicators, elevator emergency phones, and intrusion panels.
That same copper infrastructure is now being retired by major carriers, which is why the systems depending on it require a modern, compliant replacement.
The decline of POTS is not sudden. It is the result of a long-term structural shift in the telecom industry. Major providers are moving away from aging copper-based infrastructure because it is costly to maintain and no longer aligns with their long-term investment priorities.
Instead, they are focusing on more scalable, efficient fiber and wireless technologies. A recent FCC filing on POTS discontinuance reflects this broader transition, outlining AT&T's plans to discontinue POTS services by November 2026 and phase out much of its copper infrastructure by 2029. As of June 2026, the retirement of legacy systems is well underway.
According to MIX Networks and MetTel, POTS costs have become a major financial burden for businesses in 2026. Many organizations now pay between $100 and $500+ per POTS line each month, with annual costs in some areas exceeding $2,700 per line.
Over the past decade, POTS pricing has increased by approximately 300% to 500%, making traditional phone lines far more expensive than modern POTS replacement solutions. Businesses relying on multiple lines feel the impact even more. Ten POTS lines can cost approximately $5,000 per month—or $60,000 annually.
As the number of POTS users continues to decline, providers are spreading maintenance costs across fewer customers, driving prices even higher and making POTS increasingly unsustainable for long-term business use.
Historically, POTS offered high reliability and "five-nines" uptime. In 2026, maintaining that standard has become increasingly difficult. As providers prioritize modern networks, legacy copper receives minimal maintenance, leading to noticeable declines in service quality.
Businesses are experiencing increased line failures, degraded signal quality, frequent service interruptions, and slower troubleshooting and escalation.
Service-level agreements (SLAs)—the provider commitments that define how quickly issues are responded to and repaired—are also weakening. Businesses face longer repair and restoration timelines because skilled technicians for legacy copper are becoming scarce and replacement parts are increasingly difficult to obtain.
For life-safety systems, this creates direct compliance risk. Standards such as NFPA 72 require reliable, continuously supervised communication pathways and defined response times. Undetected line failures, SLAs that fall below compliance thresholds, and delayed repairs can all reduce system availability, making it harder to remain compliant in critical safety environments.
For businesses delaying replacement, the risks are immediate and operational. Costs continue to rise sharply, with some regions exceeding $2,700 per line annually. Provider support is declining as well, resulting in longer repair times, fewer qualified technicians, and reduced service quality.
For life-safety systems, a communications failure can trigger loss of occupancy, shutdowns, or expensive fire-watch requirements, making aging POTS lines a significant business continuity risk.
A structured migration helps maintain compliance for life-safety systems while eliminating unexpected costs.
List every active line, its monthly cost, and the equipment it serves, including fire alarm panels, elevator phones, intrusion systems, gates, or voice services. Prioritize any line supporting life-safety or AHJ-inspected systems, since these carry compliance obligations.
Map every line to a modern equivalent. For life-safety systems, a cellular communicator provides a supervised, NFPA 72-compliant path that is independent of aging copper. However, it is important to confirm the replacement meets the supervision and reporting requirements your authority having jurisdiction (AHJ) expects as well as the hardware limitations of the current system.
For most jurisdictions throughout the United States, a highly supervised communicator that uses a single technology such as Cellular is all that is required. In these jurisdictions, the TG-7FM or the TG-7FP can provide that single path solution. However, these two communicators only work when powered directly from the panel. For more complex installations that require the use of a dedicated power source, other options such as the TG-7FS fit the bill.
There are, however, some jurisdictions in the United State that want to rely on redundancy, and as such will enforce two paths. Whether you want to have dual path redundancy because of the technical advantages, financial savings, or AHJ requirements, true redundancy comes from the use of independent technologies. This is where the TG-7FE and the TG-7FEM come into the picture, with their ability to maintain an independent LAN connection on top of the cellular path, providing true independent redundancy.
Install and test the Telguard communicators, verify successful signal transmission to the monitoring center, document supervision intervals, and only then disconnect the legacy POTS lines. Maintain documentation of the migration for future inspections and compliance records.
AT&T's FCC filings outline discontinuing POTS service by November 2026 while retiring much of its copper infrastructure by 2029. Timelines vary by carrier and region, but the transition is already underway.
Many businesses now pay between $100 and $500+ per line each month, with some regions exceeding $2,700 annually. Prices have increased approximately 300% to 500% over the past decade.
Less so. Reduced maintenance of legacy copper has increased line failures, degraded signal quality, and lengthened repair times which can put life-safety systems out of compliance with standards like NFPA 72. While devices like the TG-7FS. are still pairing cellular with POTS as a secondary technology, the trend is diminishing as time goes on, and POTS continues to present more problems. The advantage of a Telguard device like the TG-7FS is that it can be reprogrammed to be a sole path communicator without extra hardware. The same is true for all dual path Telguard communicators such as the TG-7FEM.
A supervised cellular communicator provides a compliant, copper-independent communication path for fire alarm systems, elevator emergency phones, and intrusion systems while reducing recurring telephone line costs.
POTS is no longer simply a legacy technology—it's becoming a growing business liability. Costs continue to rise, reliability continues to decline, and provider support is disappearing. Backed by FCC policy changes accelerating copper retirement, this transition is inevitable and already underway.
Businesses that delay modernization will likely pay more, assume greater operational risk, and have fewer replacement options available when legacy services are finally retired.
As POTS and PSTN networks continue to decline, organizations need a reliable replacement for their critical communication systems. Cellular communication solutions eliminate dependence on aging copper infrastructure while supporting today's compliance and operational requirements.
Telguard's cellular communicators provide a compliant, direct replacement for traditional POTS lines, helping businesses maintain connectivity, reduce risk, lower recurring costs, and transition confidently to modern communications infrastructure.
Telguard is the leader in cellular alarm communications for fire and intrusion systems, protecting people and property with proven reliability. Backed by decades of innovation, UL‑listed technology, and dealer‑first support, Telguard delivers secure, future‑ready solutions for residential, commercial, and fire applications.
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