Elevator phone line replacement: ASME A17.1 requirements and solutions

Every elevator cab in the United States is required to have a working two-way emergency communication device. In most commercial buildings in South Florida, that device is a phone connected to a copper POTS line. When AT&T retires the copper wire center serving your building, that phone goes dead — and your elevator inspector will flag it.

This guide covers the code requirements, what happens when the line fails, and how to replace elevator phone POTS lines while staying compliant with ASME A17.1 and ADA accessibility standards.

What the code requires

Elevator emergency communication is governed by ASME A17.1 (Safety Code for Elevators and Escalators), which Florida has adopted as part of the state building code. The requirements are specific and non-negotiable:

Two-way communication in every cab

Every passenger elevator must have a means of communication between the car and authorized personnel who can take appropriate action. This isn't optional — it's a safety code requirement that applies to every elevator in every building, from a 2-story medical office to a 50-story condo tower.

45-second answer requirement

When a rider presses the emergency button, the call must be acknowledged within 45 seconds. If no one answers within 45 seconds, the call must automatically redirect to an alternate on-site or off-site location. Automated answering systems are not permitted — a live person must answer.

Video communication (2019 update)

The 2019 edition of ASME A17.1 introduced requirements for video communication capability in elevator emergency systems. This was implemented to assist riders who are deaf, hard of hearing, or speech impaired. New installations and major modernizations must include video capability.

4-hour battery backup

The entire communication system — including the phone, the network infrastructure, and any routing equipment — must have a minimum of 4 hours of battery backup. If the building loses power, elevator phones must continue working.

Building identification

When the elevator phone calls out, the system must automatically provide the building address and specific elevator number to the person answering. This allows the monitoring center or emergency personnel to identify exactly which building and which elevator needs attention.

What happens when the copper line dies

When AT&T retires the wire center serving your building, the copper line to your elevator phone simply stops carrying a signal. Here's the cascade:

• The phone goes silent. A rider trapped in the elevator presses the emergency button and nothing happens. No dial tone, no ringing, no connection.
• The 45-second redirect fails. Since the line itself is dead, the automatic redirect has nowhere to send the call.
• Your monitoring company doesn't know. Unlike fire alarm panels that display a trouble condition when the line fails, many elevator phone systems fail silently. The monitoring company may not realize the line is down until someone tests it or a rider reports it.
• The elevator inspector flags your building. During the annual or semi-annual elevator inspection, the inspector tests the emergency phone. If it doesn't connect, the elevator gets a violation. Depending on the jurisdiction, this can result in a conditional pass, a failed inspection, or in severe cases, a shutdown order until the phone is repaired.
• Liability exposure. If a rider is trapped in an elevator with a non-functional emergency phone and something goes wrong — a medical emergency, a panic attack, an extended entrapment — the building owner faces significant liability. The phone was required to work. It didn't.

How many elevator POTS lines does your building have?

Each elevator cab gets its own dedicated POTS line. The math is simple:

Many building owners in Miami don't realize how much they're paying for elevator phone lines because the charges are bundled with other telecom services or buried in a multi-page AT&T bill. A copper audit will identify every line and its cost.

Replacement options for elevator phones

Cellular POTS-in-a-box (recommended)

This is the most common and most reliable replacement for elevator phone lines. A small cellular device plugs into the existing phone jack in the elevator machine room or at the top of the hoistway. The elevator phone sees a normal analog dial tone — it doesn't know anything has changed.

Key features for elevator compliance:

• Provides standard analog dial tone that works with all existing elevator phone hardware
• Built-in battery backup (meets the 4-hour requirement)
• Line monitoring — alerts you if the communication path goes down
• Works with all major elevator phone manufacturers (Kings III, RATH, Janus, MyLinkLine)
• No rewiring inside the elevator shaft required
• ASME A17.1 compliant

Cost: $30-60 per line per month. A building with 4 elevators would pay $120-240/month, compared to $600-2,000/month on copper. Annual savings: $4,500-$21,000.

Cellular elevator monitoring service

Some elevator phone monitoring companies now offer all-in-one packages that include the phone hardware, cellular connectivity, 24/7 monitoring with live operators, and compliance documentation — all for a single monthly fee. Companies like Kings III and RATH offer these services specifically for the South Florida market.

This approach is ideal for buildings that want to modernize their entire elevator communication system, including adding video capability to meet the 2019 ASME A17.1 requirements.

What about VoIP?

VoIP can technically work for elevator phones since the communication doesn't use a DACT handshake like fire alarm panels. However, VoIP depends on your building's internet connection — if the internet goes down, your elevator phones go down with it. Most elevator consultants and inspectors prefer cellular because it's an independent communication path with its own battery backup, which aligns better with the intent of the ASME A17.1 code.

The installation process

Step 1: Identify your elevator phone setup

Determine how many elevator cabs you have, where the phone lines terminate (machine room, hoistway, or individual cab), who your current elevator phone monitoring company is, and what hardware is installed in each cab.

Step 2: Install the cellular device

The POTS-in-a-box device installs where the copper line currently enters the building's elevator phone system — typically in the machine room. No work is needed inside the elevator shaft or cab. Installation takes 20-30 minutes per elevator.

Step 3: Test every phone

After installation, each elevator phone is tested by pressing the emergency button and confirming a live connection to the monitoring center. The monitoring center verifies they receive the building address and elevator number. Document the test results for your elevator inspector.

Step 4: Notify your elevator company

Let your elevator maintenance company know the communication path has changed from copper to cellular. They may need to update their records and adjust their testing procedures for the next inspection.

Special considerations for Miami buildings

South Florida buildings face a few unique considerations for elevator phone replacement:

• Hurricane season: Cellular POTS-in-a-box devices with battery backup continue working during power outages, which is critical during hurricane season. Copper lines are actually more vulnerable to storm damage than cellular.
• High-rise buildings: Buildings over 60 feet (roughly 6 stories) have additional ASME A17.1 requirements for on-site emergency communication capability. The replacement solution must support this.
• Condo associations: The elevator phone lines are typically paid by the association, not individual unit owners. Board approval may be needed for the switch. The cost savings argument — potentially $10,000-$20,000/year — usually gets board approval quickly.
• Multiple elevator companies: Large buildings may have elevators maintained by different companies (Otis, KONE, ThyssenKrupp, Schindler). The POTS replacement works independently of the elevator maintenance company.

Frequently asked questions

Will my elevator inspector accept cellular phone lines?

Yes. Elevator inspectors in Miami-Dade and Broward County accept cellular POTS-in-a-box devices and cellular monitoring services. The inspector's concern is that the phone connects to a live person within 45 seconds and that battery backup is in place — not which technology carries the signal.

Do I need to upgrade to video communication?

The 2019 ASME A17.1 video requirement applies to new installations and major modernizations. Existing elevator phone systems in buildings that aren't undergoing modernization are typically grandfathered under the code edition that was in effect when they were installed. However, upgrading to video is becoming an industry best practice and may be required in your next modernization.

What if my elevator is older and doesn't have a standard phone jack?

Older elevators may have hardwired phones rather than standard RJ-11 jacks. A POTS-in-a-box device can still work — it connects at the point where the copper line enters the building, which is upstream of the elevator's internal wiring. The elevator's phone hardware doesn't need to change.

Can I use one cellular device for multiple elevators?

Each elevator phone needs its own dedicated line — this is an ASME A17.1 requirement. You cannot share a single line across multiple cabs. However, some cellular devices support 2 or 4 lines in a single unit, which simplifies installation in buildings with multiple elevators.

Related resources

POTS line replacement in Miami and South Florida

AT&T copper retirement in Florida: what building owners need to know

Fire alarm POTS replacement: how to stay NFPA 72 compliant

Elevator phone line replacement: ASME A17.1 requirements

POTS replacement for condos and HOAs in South Florida