# Cellular POTS replacement

> Cellular POTS replacement carries analog telephone lines over a mobile network, using an on-site appliance that presents FXS ports locally and transports the traffic over LTE or 5G.

- Also known as: wireless POTS replacement, cellular line replacement, LTE POTS replacement
- Last reviewed: July 29, 2026

## How it works

The appliance terminates the analog equipment on FXS ports, then routes voice, fax, and alarm signaling over a cellular connection to the provider's network and on to the PSTN or a monitoring center. Dual SIMs and multiple carrier profiles allow failover if one network degrades, and an integrated battery keeps the appliance running through a power outage.

## Why it matters

Cellular removes the dependency on the local wireline plant entirely, which is the point when that plant is being decommissioned. It also avoids waiting for fiber that may never be offered at a given site, and it makes each line independently monitorable.

## Common use cases

- Sites losing copper with no fiber alternative available
- Life-safety lines needing a path independent of the building's wired circuits
- Multi-site portfolios standardizing on one replacement approach

Independence from the local wireline plant is the core advantage. When the plant itself is
what is being withdrawn, a path that does not depend on it is structurally safer.

## Common misconceptions

**Claim:** Cellular is less reliable than copper for alarms.

**Correction:** Aging copper plant has become a significant source of alarm trouble conditions. A certified cellular path with battery backup and active supervision can be monitored continuously, whereas a degrading copper pair often fails silently.

**Claim:** Cellular replacement needs good signal inside the equipment room.

**Correction:** Signal at the appliance matters, but antennas can be relocated and some platforms allow the radio module itself to be extended to a better location, so a weak equipment room is usually solvable.

## Frequently asked questions

**What happens during a power outage?**

Integrated battery backup keeps the appliance and the connected analog equipment operating for a rated period. Runtime is a specification to check per model against the requirement for that endpoint.

**Which carriers can be used?**

That depends on the model's carrier certifications. Certification is per device, so confirm the specific model against the carrier you intend to use.

## Sources

- [Copper Retirement](https://www.fcc.gov/general/copper-retirement) — Federal Communications Commission


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Canonical page: https://dataremote.com/newsroom/definitions/cellular-pots-replacement
Organization: DataRemote, Inc. — POTS line replacement, cellular failover, and fixed wireless access solutions. https://dataremote.com