POTS Line Replacement: The Best Providers, Options and Costs (2026)

What is the copper sunset, and when do POTS lines go away?

The copper sunset is the planned retirement of the copper network that carries POTS (plain old telephone service). Carriers are already retiring it, so a POTS line replacement plan is no longer optional.

• It has started: the FCC transition that lets carriers stop maintaining copper began in 2022.
• Copper is shrinking fast: US copper lines fell from about 122 million in 2014 to about 41 million in 2024.
• Prices keep rising: an analog line costs about $50 per month, plus about $25 for each extra line.
• Service is getting worse: as crews and parts move to fiber, repairs on copper take longer.

Are POTS lines being phased out? Yes. Copper line retirement happens area by area, and carriers usually give notice before they stop service. The safest plan is to move each line before you get that notice.

Which devices still use POTS lines?

Most businesses have more analog lines than they think. Use this list as an audit before you pick a provider:

• Fire alarm panels that dial the monitoring center.
• Elevator phones in each car.
• Fax machines and fax lines on copiers.
• Security and burglar alarms.
• Boiler, freezer and building alarms.
• Gate phones, pool phones and door intercoms.
• Point-of-sale terminals and old card readers.
• Dedicated 911 lines and emergency call boxes.
• Voice lines on desk phones and old PBX systems.

For each line, note the phone number, the device it connects to and the room it is in. This list decides which replacement each line needs.

POTS line replacement options compared

There are five main POTS line replacement options. The right one depends on whether the line carries voice or a life-safety device.

Option	What it is	Typical price	Works for life-safety?
LTE gateway (POTS-in-a-box)	A box that turns an analog line into a cellular connection	$15–$45 per line/month + hardware	Yes, when certified and approved locally
VoIP with an ATA	An analog telephone adapter that connects an old device to VoIP	$10–$30 per line/month	Rarely; not for fire alarms
SIP trunking	Digital voice lines for an existing PBX	$15–$25 per line/month	No
Cloud PBX / UCaaS	A cloud phone system that replaces desk phones and the PBX	$20–$50 per user/month	No, voice only
Fiber managed voice	Voice service delivered over the carrier’s fiber	Varies	Depends on the carrier

LTE POTS replacement is the usual answer for alarms and elevators, because it does not depend on the building’s internet. Pots in a box is the common name for these LTE gateways. For voice lines, a cloud phone system gives more features at a lower cost per line. But a cloud phone system is only as reliable as the internet under it, so the best choice for voice is a provider that also runs the connection. Vivant delivers the phone system, internet, dual backup internet and network security as one managed service.

How we picked these providers

We started with some market research to find the leading phone system brands. From there, we scored each provider on five technical criteria:

Criterion	Weight	What we checked
Compliance for its use case	30%	For voice: E911 and Kari’s Law support. For analog devices: UL and NFPA certification and inspector approval
Reliability	25%	Failover, battery backup, uptime SLA
Coverage	15%	Nationwide service, multi-site support
Price transparency	15%	Published prices vs quote only
Managed service and support	15%	Who installs, monitors and fixes the service

How we score: each criterion gets a rating from 1 to 5. The final score is the weighted average, shown with its breakdown at the end of each review.

The best POTS replacement providers compared

A cloud phone system replaces voice lines and the old PBX. It does not replace fire alarm or elevator lines. Those need a certified device, covered in the next section.

1. Vivant Business Phone System

The best overall POTS replacement for businesses that want to stop managing their own connectivity. Vivant takes a 360° approach: one provider moves your voice lines off copper and delivers the phone system, internet, dual backup internet, network security and support, all for one monthly price per location. It guarantees 100% uptime in writing, and a Vivant team sets up and manages everything for you. Businesses with several locations get the most value from it.

At a glance:

• Best for: single and multi-location businesses that want a managed system and have no in-house IT team
• Replaces: voice lines, desk phones, the on-site PBX, and the separate internet and backup lines that voice now depends on
• Price: one monthly price per location, quoted after a free cost analysis (on average, 20% saving)
• Uptime: 100%, guaranteed in writing
• Support: 24/7 live technicians and free lifetime maintenance

Vivant’s 360° approach to connectivity:

When copper goes away, your voice lines move to the internet. That makes the internet, the network and its security part of your phone service. Most POTS replacement providers sell one of these layers and leave the rest to you. When calls drop, the phone vendor blames the internet provider, and the internet provider blames the phones. Vivant designs, deploys and manages every layer, so one team is accountable for the whole connection, from the network cable to the call.

What the price includes:

Included in Vivant’s price	What it does for the business	What you would otherwise pay for
Entry internet service	Primary business internet for the site	A separate internet provider bill
Dual backup internet	Two backup connections take over if the primary line fails	A second internet line or a 4G/5G backup plan
Phone service	Numbers, calling and unlimited texting	A per-user VoIP plan
Phone system	Auto attendant, call routing, recording and analytics	Higher tiers and add-ons
Intrusion detection and prevention	Finds and blocks threats on the office network	A firewall or security service
Quarterly PCI compliance	Scans the network for sites that take card payments, including card terminals that leave copper	A third-party scanning vendor
Network redundancy and failover	Moves traffic to a working connection automatically	Network equipment and setup
Proactive support and management	24/7 monitoring, updates and live technicians	A managed IT provider

So compare Vivant’s price with the total of all these bills, not with a per-user phone plan alone.

Strengths:

• 100% uptime SLA: a formal, written guarantee, not 99.9%. The High Availability Fault Tolerant (HAFT) architecture runs across several cloud providers and geographic regions. If one region has a problem, calls reroute instantly with no dropped connections. Nextiva publishes 99.999%. Only Vivant guarantees 100%.
• Calls continue when the internet drops: Vivant’s dual backup internet takes over in seconds, the mobile app works over cellular, and calls reroute to backup numbers.
• Network security included: intrusion detection and prevention protects the office network, and quarterly PCI compliance scans cover card payments.
• One system for every location: one portal, one bill and one support team. Calls transfer between sites, and each site keeps its local numbers.
• E-911 with location: emergency calls route with the correct address for responders.
• Number porting: Vivant moves your existing copper numbers with minimal downtime.
• One price, no add-on fees: call recording, unlimited texting, auto attendant, voicemail to email, Command Central analytics and nationwide calling are included.
• Missed Call Text Back: AI-powered call deflection texts every caller you could not answer, so a missed call becomes an open conversation.
• A BAA for healthcare: many popular VoIP platforms do not offer a business associate agreement (BAA) by default, and some offer it only on enterprise tiers. Vivant includes a BAA with every deployment, so medical and dental offices can move off copper and stay HIPAA compliant.
• Managed from start to finish: Vivant reviews your current bill and lines, designs the call flows, installs and supports the system with 24/7 live technicians and free lifetime maintenance.

How Vivant compares with a typical cloud phone provider:

Feature	Vivant	Typical cloud phone provider
Internet and backup internet	Included, with dual backup	Not included
Network security	Intrusion detection and prevention included	Not included
Uptime guarantee	100%, in writing	99%
Number porting and setup	Done for you	Self-service on lower plans
BAA for healthcare	Every deployment	Often not by default, or on enterprise tiers only
Support	24/7 live technicians	Varies by plan

Considerations:

• Life-safety lines: fire alarm and elevator lines need a certified POTS-in-a-box device, which Vivant does not list today.
• Quote-based pricing: there is no public price list, but the quote covers the phones, internet, backup internet and security, so there are no add-ons to price later.
• Fax: not listed on the product page.

Choose it if you want one provider to move your voice lines off copper and run the internet, backup and security under them, with a written guarantee that they stay up. For alarms and elevators, pair it with a certified POTS-in-a-box provider.

Score: 4.6/5 (Compliance 4.5 · Reliability 5 · Coverage 4.5 · Price transparency 3.5 · Managed service 5)

2. Nextiva

Nextiva is a strong pick for businesses that want to move voice lines from an old PBX to a full cloud suite.

At a glance:

• Best for: moving voice lines from a PBX to cloud
• Replaces: voice lines and the PBX
• Price: from $15 per user per month (Core plan)

Strengths:

• Full UCaaS suite: voice, video, messaging and analytics.
• Published prices.
• Scales well as you add users.
• 99% uptime published.

Considerations:

• Not for life-safety: Clearlink notes it is “not designed for life-safety use cases.”
• Needs internet, so plan for failover.
• Self-managed setup on lower plans.

Choose it if you want a low entry price and a large feature set. Skip it if you need someone to run the system for you.

Score: 4.2/5 (Compliance 4 · Reliability 4.5 · Coverage 4.5 · Price transparency 4.5 · Managed service 3.5)

For more on how cloud voice works, read our guide: What Is a VoIP Phone System?

Best POTS replacement for alarms, elevators and fax

POTS-in-a-box providers replace analog lines with an LTE gateway that the alarm panel, elevator phone or fax plugs into. These are the lines where a mistake is most dangerous, so certification and backup power matter more than price.

1. MetTel

MetTel is the pick for large enterprises and public-sector groups with many sites.

At a glance:

• Best for: large multi-site enterprises and the public sector
• Supports: alarms, elevators, fax and other analog devices
• Price: by quote

Strengths:

• Scale: more than 17,000 sites deployed.
• Dual-SIM failover: switches carriers if one network goes down.
• Managed monitoring: MetTel watches the devices for you.
• LTE connection that does not depend on building internet.

Considerations:

• Built for enterprise scale, so it is less cost-effective for a single small site.
• No public pricing.
• Certification: check its fire and elevator approvals for your site.

Choose it if you manage dozens or hundreds of sites. Skip it if you have one building.

Score: 4.2/5 (Compliance 4.5 · Reliability 4.5 · Coverage 4.5 · Price transparency 2.5 · Managed service 4.5)

2. Granite EPIK

Granite EPIK is a managed POTS replacement from Granite, a large carrier, and it fits enterprises that already buy from Granite.

At a glance:

• Best for: large enterprises, especially current Granite customers
• Supports: alarms, elevators, fax and other analog devices
• Price: enterprise quote

Strengths:

• Large, stable company ($1.85B in revenue).
• Multi-carrier: uses more than one wireless network for failover.
• Managed service: Granite installs and supports the devices.

Considerations:

• Priced for enterprise, which makes it hard for small businesses.
• No public pricing.
• Certification: confirm approvals for your fire and elevator lines.

Choose it if you already use Granite and want one vendor. Skip it if you are a small business.

Score: 4.1/5 (Compliance 4.5 · Reliability 4.5 · Coverage 4 · Price transparency 2 · Managed service 4.5)

3. Ooma AirDial

Ooma AirDial is the easiest POTS-in-a-box for small and mid-size sites.

At a glance:

• Best for: small and mid-size businesses
• Supports: alarms, elevators and fax
• Price: Ooma claims up to 60% savings compared with copper

Strengths:

• All in one bundle: hardware, data and voice.
• Plug-and-play setup.
• Known brand with a compliance focus.

Considerations:

• Certification: verify its fire and elevator code approval for your site.
• Pricing depends on the number of lines.
• Fewer managed services than MetTel or Granite.

Choose it if you have one to a few sites and want a simple device. Skip it if you need enterprise-wide monitoring.

Score: 4.0/5 (Compliance 4 · Reliability 4 · Coverage 4 · Price transparency 4 · Managed service 4)

POTS replacement for fire alarms, elevators and 911

Life-safety lines need a certified replacement and local approval before you cancel copper. Plain VoIP is not enough.

Fire alarms

POTS replacement for fire alarms has the strictest rules.

• Certification: the device should be listed for fire alarm use (for example, UL listed) and meet NFPA 72.
• Battery backup: many codes require 24 hours of standby power for alarm communicators.
• Inspector sign-off: the local fire marshal or authority having jurisdiction must approve the new path before the copper line goes away.
• Fire alarm panel compatibility: check that the gateway supports the panel’s signaling format.

Elevator phones

Elevator phone line replacement follows the elevator code, which requires a working two-way phone in every car.

• Always on: the line must work during a power outage, so battery backup is required.
• Monitoring: the phone must reach a staffed location 24/7.
• Inspection: the elevator inspector should test the new line.

911 lines and E911

Voice lines that can dial 911 must still send a correct location. A cloud phone system should support E911 with the address and floor of each phone, and meet Kari’s Law direct-dial rules. Read our guide to Kari’s Law for the details.

How much does POTS replacement cost?

POTS replacement cost depends on how many lines you have and what each one connects to. In most cases the new services cost less than copper, and the savings grow as copper prices rise.

Worked example for an office with 10 copper lines (6 voice, 1 fax, 2 alarm, 1 elevator):

	Today (POTS)	After replacement
Voice lines	6 copper lines	6 cloud phone users at $20 = $120
Fax, alarm and elevator	4 copper lines	4 LTE gateway lines at $30 = $120
Monthly total	$50 + (9 × $25) = $275	About $240

The example uses mid-range prices from the options table and Nextiva’s copper prices. Hardware, installation and inspection fees are extra. The cloud phone price also leaves out the internet connection and backup line that voice lines now depend on. Vivant’s per-location price includes both, plus network security and management, so compare the full monthly total.

Two more costs to plan for:

• Hardware: LTE gateways and ATAs cost more up front. Some providers include them in the monthly fee.
• Staff time: a managed service costs more per line than a self-managed one, but it moves setup, monitoring and repairs to the provider. With Vivant, one team handles the phones, internet and network, so there is only one number to call.

How to replace POTS lines, step by step

Follow these seven steps. Keep each copper line active until its replacement passes the test.

1. List every line and what it connects to: phone number, device, room and building.
2. Sort the lines into two groups: voice lines and life-safety or analog devices.
3. Choose a solution for each group: a cloud phone system for voice, a certified POTS-in-a-box for alarms, elevators and fax.
4. Test each device on the new service. Keep the copper line until the test passes.
5. Port the numbers to the new providers.
6. Get inspector sign-off for fire alarm and elevator lines.
7. Cancel the copper lines only after steps 4 to 6 are complete.

Most single-site projects take a few weeks. Multi-site projects are usually done in waves, site by site.

POTS replacement for multi-location businesses

Multi-location businesses have the most copper lines and the most to gain. A chain of 20 offices can have 200 or more analog lines, often on different carriers and contracts.

• Audit every site the same way: use one spreadsheet with the same columns (number, device, room, carrier, monthly cost) for all sites.
• Standardize the solution: one cloud phone system for voice at every site, and one certified gateway model for alarms and elevators.
• Move in waves: start with a pilot site, fix the process, then move the rest in groups.
• Keep one view: a single portal for all sites makes it easier to see which lines are live, which are tested and which copper lines are still billing. Vivant gives you one portal, one bill and one support team for the voice lines and the connectivity at every site.
• Plan E911 per site: each location needs its own validated address and floor details.

Questions to ask a POTS replacement provider

Ask each provider these questions in writing before you sign:

1. Which devices do you support: voice, fax, fire alarms, elevators, security alarms?
2. Is your gateway listed for fire alarm use, and has it passed inspection in my area?
3. How long does the battery backup last, and who replaces the batteries?
4. What happens if the cellular network goes down? Do you use more than one carrier?
5. For voice lines: do you also provide the internet, backup internet and network security, or only the phone service?
6. What is your uptime SLA, and is it in writing?
7. Do you cover every one of my addresses? Can you run a coverage check?
8. Who installs and monitors the devices, and how fast do you respond to an alarm?
9. For healthcare: will you sign a BAA, and on which plan?
10. What are the full costs: monthly fee, hardware, installation and contract length?

Mistakes to avoid

These mistakes cause most failed POTS replacement projects:

• Putting alarm lines on plain VoIP. Fire alarms need a certified path, not a basic ATA on office internet.
• Moving voice lines with no backup internet. Without failover, one internet outage takes down every phone in the building.
• No battery backup. When the power goes out, the alarm and elevator lines must keep working.
• No inspector sign-off. Without approval, the building can fail inspection.
• Cancelling copper too early. Keep the old line until the new one passes every test.
• Forgetting lines. A missed gate phone or fax line stops working when the carrier retires copper.

How Vivant helps

Vivant moves business voice lines off copper and delivers everything under them as one managed service. Here is what Vivant covers:

• Phones: a cloud phone system with number porting, call flows for each site, E-911 and unlimited texting.
• Connectivity: entry internet service, dual backup internet and network failover at every site.
• Security: intrusion detection and prevention, plus quarterly PCI compliance scans.
• Uptime: 100%, guaranteed in writing.
• Compliance: a BAA with every deployment for healthcare businesses.
• Support: 24/7 live technicians, proactive management and free lifetime maintenance.

For businesses with several locations, every site sits in one portal with one bill.

FAQ

What is the best replacement for POTS?

There is no single answer, because lines do different jobs. For voice lines, a cloud phone system is usually best. For fire alarms, elevator phones and fax, a certified LTE gateway is the usual choice. Most businesses use both.

What happens if I do not replace my POTS lines?

Your copper lines will keep getting more expensive and slower to repair. When the carrier retires copper in your area, the lines stop working, and any alarm, elevator phone or fax on them goes silent. Plan the switch before you get the notice.

How long does the switch take?

A single site with a few lines can move in a few weeks. The slowest steps are number porting and inspector sign-off for fire and elevator lines. Multi-site projects usually move in waves, one group of sites at a time.

Should I use one provider or several?

Many businesses use two: an end-to-end voice provider for voice lines and a POTS-in-a-box provider for alarms, elevators and fax. For the voice side, Vivant keeps the vendor count low, because one provider covers the phone system, internet, backup internet and security. Compare the scope before you decide.

Are all POTS replacement providers nationwide?

No. Some cover the whole country, and others serve only certain regions or carriers. LTE gateways also depend on cellular coverage at each site, so ask for a coverage check for every address.

Will my fax machine work after the switch?

Yes, if you choose the right path. Fax can move to an LTE gateway that supports fax, or to a cloud fax service that sends documents by email. Test the fax line before you cancel copper.

Bottom line

For most businesses, Vivant Business Phone System is the best POTS replacement for voice lines. It is the only end-to-end option here: one provider runs the phones, internet, dual backup internet and network security, with a 100% uptime guarantee in writing, number porting and 24/7 managed support. Businesses with several locations get one system and one bill for every site. Nextiva suits businesses that want a low-cost, self-managed cloud suite. For alarms, elevators and fax, MetTel and Granite EPIK lead for large enterprises, and Ooma AirDial is the simplest choice for small sites.

Start with a line audit, then move voice and life-safety lines to the right services. Talk to Vivant about a business phone system and a free cost analysis.