Why POTS lines are going away

Maintaining copper infrastructure for a shrinking base of customers has stopped making financial sense for carriers, and regulators have removed most of the friction that used to slow retirements down. The FCC's Network and Services Modernization Order in March 2026 further accelerated the pace at which carriers can retire copper networks, and AT&T followed with discontinuation notices covering roughly 500 wire centers starting in June 2026. Once a wire center is on the list, the typical pattern is a 90-day written notice before dial tone actually stops.

Where copper is still available, carriers have been pricing it to encourage migration rather than to reflect the cost of service. Enterprise POTS bills commonly run $60 to $100 or more per line per month once taxes, surcharges, and maintenance fees are added, and legacy-line rate increases have pushed well past that on lines carriers most want off their books. The direction only goes one way: up, on a network that is being phased out regardless.

What still runs on copper

Voice is usually the smallest part of the problem. The lines businesses forget about are the ones nobody dials on purpose:

• Fax machines. Referral, order, and compliance fax lines in healthcare, legal, and manufacturing offices often still run on analog copper.
• Elevator phones. Code-required two-way communication in the cab, typically wired directly to a dedicated POTS line.
• Fire alarm panels. Supervising-station monitoring that dials out over copper to report alarms and faults.
• Security and access control systems. Burglar alarms, gate entry, and monitored access panels frequently dial out the same way.
• Point-of-sale and payment terminals. Older credit card and check-processing equipment in retail locations.
• Backup and out-of-band lines. Analog lines kept as a fallback for network gear, PBX trunks, or emergency phones in common areas.

Run the inventory before you plan the migration. Facilities, IT, and whoever manages fire and security compliance usually each know about different lines, and no single department has the full list.

The replacement paths

There is no single product that replaces every copper line, because voice and equipment lines have different requirements.

• Hosted VoIP or UCaaS. The right move for ordinary voice lines: desk phones, main lines, and departmental extensions move to a cloud platform with no code-compliance issues to solve.
• Cellular POTS replacement devices. Purpose-built hardware, sometimes called "POTS in a box," that bridges an existing analog device to a cellular network. This is the correct path for elevator phones, fire panels, and alarm systems, since these devices are built to meet the specific standards those lines are held to.
• Managed replacement services. For businesses with copper lines across many locations, a managed service can inventory, order, and provision replacements location by location so nothing gets missed before a carrier's cutoff date.

Cost comparison

The replacement side of this table gets cheaper and more predictable over time. The copper side does not.

Compliance gotchas

• E911 and location accuracy. Any replacement for a voice-capable line needs to route emergency calls with accurate location data, the same requirement VoIP systems already have to meet.
• Standby power. Life-safety lines need battery backup sized to code requirements, not just whatever the replacement device ships with by default.
• Self-supervision and reporting. Fire and elevator codes expect the line to detect and report its own failure, not fail silently until someone notices during an inspection.
• Local AHJ sign-off. Confirm your local authority having jurisdiction accepts the specific replacement equipment before relying on it, since acceptance can vary by municipality.

A porting checklist that avoids the common mistakes

1. Inventory every copper line across every location, including the ones nobody dials on purpose.
2. Sort each line into voice or equipment, since they take different replacement paths.
3. Check for a carrier discontinuation notice on any wire center you operate in, and work backward from that date.
4. Move voice lines to UCaaS first; that migration is the most standardized and lowest-risk.
5. Get code-compliant cellular replacement devices in place for elevator, fire, and alarm lines well before the copper cutoff, not the week of it.
6. Confirm E911 routing and AHJ acceptance on every life-safety line before decommissioning the old one.
7. Do not cancel any copper line until its replacement has been tested end to end, including a live emergency-call test where possible.

Our view

The businesses that get burned by this are the ones who plan around the wrong deadline, the day the carrier notice arrives instead of the months it actually takes to inventory, order, and test replacements for every line type. Voice is the easy part. The equipment lines are where a rushed migration causes real problems, since a fire panel or elevator phone that fails a compliance test is a worse outcome than a slightly higher copper bill for one more renewal.

Wholesale VoIP pricing applies to the voice side of this migration the same way it applies to any other seat count. Price the UCaaS side properly and the copper savings show up on their own.