# Campus Blue Light Phones After Copper: A 90X1 Use Case

> How campus blue light emergency phones keep working after copper retirement: the 90X1 replaces the POTS line, not the tower. Setup, testing, and a white paper.

- Published: October 30, 2026
- Author: DataRemote
- Topics: Use Cases, Emergency Communication, POTS Replacement, Life Safety, Compliance
- Primary entity: endpoint:emergency-call-box
- Related entities: family:pots-in-a-box, platform:ara, product:90x1, solution:pots-line-replacement, solution:analog-telephone-connectivity, topic:life-safety-communications, topic:pots-line-replacement, standard:emergency-communication-requirements, definition:ring-down-line, definition:fxs, definition:enhanced-911, definition:battery-backup
**Direct Answer:**
Campus blue light emergency phones were built around an analog POTS line: press the button, the station goes off-hook, auto-dials campus police or security, and lights its strobe. When that copper line is retired, the [DataRemote 90X1](https://dataremote.com/pots-in-a-box/90x1) replaces the line, not the phone. The tower's existing Tip/Ring pair lands on a 90X1 FXS port, the call travels over 5G/LTE with wired WAN failover, and the station, the strobe, and the dispatch workflow stay exactly as they were. This post covers how the connection works, what to check at each station before you order, and how to test the result. The one-page summary is available as a [PDF white paper](https://dataremote.com/documentation/marketing/dataremote-90x1-campus-blue-light-phones.pdf).

## Key Takeaways

- **Replace the line, not the tower.** An analog blue light station needs a phone line that behaves like copper. The 90X1 presents one on each of its eight FXS ports, so the existing call box and its wiring stay in service.
- **Both call methods are supported.** A ring-down (hotline) line places the call the moment the button is pressed. Stations with their own auto-dialer are supported with automatic pulse and DTMF detection.
- **Dispatch sees the same thing.** Caller ID is set per line in Ara, so the answering desk still knows which station is calling.
- **Outages are covered on the line side.** An integrated 18-cell lithium battery keeps the line live when power fails, and a 12 V UPS output can power an approved device. The tower's own power still needs its own plan.
- **Each station gets supervised.** Ara line-status monitoring and alerts replace the silence of a copper pair that fails without warning.
- **Test station by station.** The acceptance test is a real button press: two-way audio, strobe activation, and caller ID at dispatch.

## The use case at a glance

| Detail | This use case |
|---|---|
| **Endpoint** | Campus blue light emergency phones: towers and wall-mount call boxes along walkways, in parking lots and garages, and at residence halls |
| **Line today** | One analog POTS pair per station, usually a ring-down (hotline) or an auto-dial line to campus police or security |
| **Product** | DataRemote [90X1](https://dataremote.com/pots-in-a-box/90x1) 5G POTS IN A BOX®, up to eight stations per appliance |
| **Transport** | 5G/LTE, with wired WAN failover where the site has a wired internet connection |
| **Answer point** | Campus police, a security desk, or 911, unchanged |
| **What stays the same** | The station, its wiring, its strobe, and the number dispatch answers |
| **Management** | [Ara](https://dataremote.com/ara): hotline destination or dialing plan, caller ID, line-status monitoring, alerts, E911 geo-location |

## How a blue light phone uses its POTS line

A blue light station is a simple analog device with one job. Under the housing is a hands-free telephone, a call button, and a strobe. The telephone connects to a two-wire analog line, the same kind of [POTS line](https://dataremote.com/newsroom/definitions/pots-line) that fed desk phones for a century. When someone presses the button:

1. **The station goes off-hook.** The phone closes the line and draws [loop current](https://dataremote.com/newsroom/definitions/loop-current), which tells the line that a call is starting.
2. **The call is placed, one of two ways.** On a [ring-down line](https://dataremote.com/newsroom/definitions/ring-down-line), the line itself connects the station to a fixed destination the moment it goes off-hook; the station never dials. On a dialed line, the station's own auto-dialer sends the dispatch number as pulse or [DTMF](https://dataremote.com/newsroom/definitions/dtmf) digits.
3. **The strobe lights.** The station's electronics turn on the blue strobe so responders can see which tower is active. This is a function of the station, not the line.
4. **Dispatch answers.** The answering desk sees the caller ID assigned to that line, which is how it tells one station from fifty others on a large campus.

The station depends on the line for three things: loop current when it goes off-hook, a path for the call, and in some configurations ring voltage so dispatch can call the station back. A replacement has to provide all three in the same form, which is why a generic VoIP adapter that only promises dial tone is not enough. Our guide to [emergency phones and ring-down lines after copper](https://dataremote.com/blog/elevating-safety-standards-for-emergency-communication-lines-with-dataremotes-pots-in-a-box) covers the ring-down behavior in more depth.

### What copper never told you

An analog pair gives no warning when it fails. A station can sit on a dead line for months and look normal from the walkway, because the strobe and the button are powered by the tower, not the line. Campuses that rely on scheduled walk-around tests find out at the next test, or when someone presses the button and nothing happens. That silent-failure mode matters more than the retirement date, and it is the reason the replacement should add supervision as well as a call path.

## Why copper retirement reaches the quad

Carriers are moving voice service off copper and the legacy time-division multiplexing (TDM) networks behind it onto IP and wireless technology. The FCC's [guidance for government officials on network modernization](https://www.fcc.gov/modernizing-telecommunications-networks-what-government-officials-need-know) describes the transition and the notice rules around it: incumbent carriers must give non-residential retail customers at least 180 days' notice before a copper retirement that replaces their copper connection with fiber. The same page notes that traditional copper landline service typically works during power outages, while modern alternatives usually need backup power. Both points shape how a campus should plan.

The retirements are no longer hypothetical. AT&T's application to discontinue legacy POTS in portions of 18 states was deemed granted under the FCC's streamlined process on January 12, 2026, authorizing discontinuance on or after November 15, 2026; the dated record is in our newsroom: [FCC grants AT&T applications to discontinue POTS in portions of 18 states](https://dataremote.com/newsroom/news/fcc-grants-att-pots-discontinuance-18-states-november-15-2026). Verizon has filed its own [Section 214 application covering copper POTS in nine states and D.C.](https://dataremote.com/newsroom/news/verizon-section-214-application-discontinue-copper-pots-nine-states-dc) A campus with towers on those carriers' copper is on a timeline whether or not it has received the notice yet.

Blue light phones carry an institutional obligation as well as a safety one. The Clery Act regulations at [34 CFR 668.46](https://www.ecfr.gov/current/title-34/subtitle-B/chapter-VI/part-668/subpart-D/section-668.46) require an institution's annual security report to state its policies and procedures for students and others to report criminal actions or other emergencies occurring on campus (paragraph (b)(2)), and its emergency response and evacuation procedures (paragraph (g)). The regulation does not mandate blue light phones. Many campuses, though, name the stations in those published procedures as a way to reach campus police, and a station that cannot connect is a published procedure that does not work.

For the wider picture of what a campus still has on copper beyond its emergency phones, see our [university POTS replacement guide](https://dataremote.com/blog/university-pots-replacement-copper-retirement).

## How the 90X1 connects to a blue light tower

To the call box, the 90X1 looks like a standard phone line, so nothing changes at the tower. The appliance sits where the copper pair terminated, typically a wiring closet or an enclosure that serves a cluster of stations, and the existing Tip/Ring pair from each tower lands on one of its eight RJ-11 [FXS](https://dataremote.com/newsroom/definitions/fxs) ports. The call leaves the appliance over 5G/LTE. If the site also has a wired internet connection on the 90X1's WAN port, it serves as failover.

Three parts of the station's behavior deserve a closer look, because they are where a replacement either preserves the workflow or breaks it.

### Hotline and auto-dial: two ways to place the call

| Station type | How the call is placed today | On the 90X1 |
|---|---|---|
| **Ring-down (hotline) station** | The line connects to a fixed destination the moment the station goes off-hook; the station has no dialer | Configure the hotline destination for that line in Ara. Going off-hook places the call. |
| **Auto-dial station** | The station's own dialer sends the dispatch number as pulse or DTMF digits when the button is pressed | The 90X1 detects pulse and DTMF dialing automatically. Set the dialing plan for that line in Ara so the station's stored number reaches dispatch as before. |

Either way, the caller ID presented to dispatch is set per line, so a desk that answers dozens of stations keeps seeing which tower is calling. If dispatch needs to ring a station back, confirm that the station's ringer behaves as expected on the new line during the acceptance test.

### Staying up when the power fails

The FCC's note about backup power is the planning point most often missed. Copper carried its own power from the central office; a replacement line does not. The 90X1 addresses this on the line side with an integrated 18-cell, 15 Ah lithium-ion battery rated for up to 48 hours of standby (actual runtime varies with usage), and a 12 VDC, 3.0 A UPS output that can power an approved connected device. When the battery runs low, the appliance sends a battery alert and shuts down gracefully.

That covers the line. The tower's own electronics, strobe, and any lighting are usually powered separately, often from the same campus circuit that feeds area lighting, and in some installations from a solar or battery supply at the tower. Treat the two as separate questions. A station whose line stays live for two days but whose own electronics lose power after an hour is still a station that cannot call. Our definition page on [battery backup](https://dataremote.com/newsroom/definitions/battery-backup) covers how to turn a standby rating into a runtime plan.

### Knowing each station is ready

The 90X1 is managed through [Ara](https://dataremote.com/ara), DataRemote's device management platform. For a blue light deployment, three Ara functions do the work:

- **Line-status monitoring with alerts.** Each 90X1 line reports its status, so a station that drops off the line raises an alert rather than waiting for the next walk-around test.
- **Remote management.** Hotline destinations, dialing plans, and caller ID are configured and changed from the portal, without a truck roll to each tower.
- **E911 geo-location.** The 90X1's integrated GNSS supports [E911](https://dataremote.com/newsroom/definitions/enhanced-911) with geo-location for calls that route to the public safety answering point rather than to a campus desk.

Ara monitoring supplements the physical test. It does not replace it. A line can report healthy while a station's button or speaker has failed, so keep the scheduled button-press test on the calendar.

## Before you order: six questions for each station

Most of the work in a blue light migration is in the inventory, not the installation. Walk each station and answer these before sizing the order.

| Question | Why it matters |
|---|---|
| **Is the station analog or IP?** | Only an analog call box on a two-wire line fits this use case. Some newer stations are IP devices with an Ethernet connection and a network power supply; they connect differently and are outside the scope of this post. Open the housing and look for a two-wire connection before assuming. |
| **Ring-down or auto-dial?** | Decides whether the hotline destination is configured on the 90X1 line or the station's own stored number is kept. Record the stored number for auto-dial stations. |
| **What does dispatch expect to see?** | The caller ID or station label the answering desk uses to identify the tower, and whether dispatch ever needs to call the station back. |
| **Where does the pair terminate?** | The wiring closet or enclosure where the copper pair ends is the natural location for the 90X1, and the number of pairs that land there decides how many appliances the campus needs. |
| **How is the tower powered?** | Whether the station's electronics and strobe have their own backup. This decides whether the 90X1's UPS output or a separate supply is part of the plan. |
| **What is the cellular signal at the closet?** | Measure signal where the appliance will sit, not at the tower. A closet in a basement or a steel-framed garage may need an external antenna. |

A campus with stations spread across parking structures and remote lots will find that the closet question drives the design: several towers often share one closet and one 90X1, while an isolated tower may justify a small enclosure of its own.

## Installation and testing, station by station

The installation itself is short. The white paper reduces it to three steps, and the third is the one that matters.

1. **Connect.** Land the tower's Tip/Ring pair on any of the 90X1's eight RJ-11 FXS ports. Label the port with the station's identifier.
2. **Configure.** In Ara, set the hotline destination or the dialing plan for that line, and set the caller ID dispatch should see.
3. **Test.** Press the button at the station. Confirm two-way audio with the answering desk, strobe activation, and the expected caller ID at dispatch.

Complete an end-to-end call test from each station after installation, with someone at the dispatch end confirming what they saw and heard, and record the result per station. The acceptance checklist below is a starting point; the campus's AHJ, risk office, or police department may add to it.

| Acceptance check | Pass condition |
|---|---|
| Button press places the call | Dispatch rings within the expected time; ring-down stations connect without dialing |
| Two-way audio | Both parties hear each other clearly at the station's normal volume |
| Strobe | Lights on button press and clears as it did on copper |
| Caller ID | Dispatch sees the identifier assigned to that station |
| Callback (if used) | Dispatch can ring the station and it answers as expected |
| Battery | Remove AC power from the 90X1 and repeat the call test on battery |
| Supervision | Disconnect the station's pair and confirm Ara raises the alert |
| Accessibility signals | Any visual and audible indicators the station provides still behave after the cutover |

The last row deserves a word. The 2010 ADA Standards for Accessible Design, in [section 708 on two-way communication systems](https://www.ada.gov/law-and-regs/design-standards/2010-stds/), require such systems to provide both audible and visual signals where the section applies. Whether a given blue light station falls under that scoping is a question for the campus's accessibility reviewer; what the migration owes them is confirmation that the station's indicators still work. The final installation must meet the site's applicable emergency communication, accessibility, and life-safety requirements, which is why the test, not the connection, is the finish line. The requirements that govern these circuits are summarized on our [emergency communication requirements](https://dataremote.com/newsroom/standards/emergency-communication-requirements) page.

## Planning a campus-wide migration

A single tower is an afternoon. A campus with sixty of them is a program, and it runs best in this order:

1. **Inventory each station** using the six questions above, including stations in parking structures, athletic facilities, and remote lots that are easy to miss.
2. **Group stations by closet.** Each closet with analog pairs becomes a 90X1 site; a closet with more than eight pairs gets a second appliance.
3. **Pilot one cluster.** Pick a closet with a mix of ring-down and auto-dial stations, migrate it, and run the full acceptance checklist with dispatch.
4. **Roll out around the academic calendar.** Summer and breaks are the natural windows; stations near residence halls go first.
5. **Document the result.** A per-station record of the test, the Ara configuration, and the closet location is what the campus will hand to its AHJ, its insurer, and the next facilities team.

Keep the old copper in service at each cluster until the new line has passed its test, and tell dispatch which stations are moving and when, so an unexpected caller ID during the cutover is understood rather than ignored. The sequencing in our [POTS line replacement](https://dataremote.com/solutions/pots-line-replacement) approach applies here with one addition: the answer point is part of the test plan, not just the stations.

**Plan your blue light migration:**
Start with the station inventory: analog or IP, ring-down or auto-dial, which closet, how it is powered, and what dispatch expects to see. Share it with DataRemote and we will help you size the 90X1 deployment and build the station-by-station test plan. [Talk to a DataRemote engineer](https://dataremote.com/contact).

## How DataRemote helps

DataRemote's POTS line replacement approach keeps existing analog equipment in service while the transport underneath moves to managed cellular. For campus blue light phones, that means:

- **The 90X1**, a 5G POTS IN A BOX® appliance with eight RJ-11 FXS ports with surge protection, ring-down capability, in-band and out-of-band DTMF, an integrated 18-cell lithium battery rated for up to 48 hours of standby, a 12 VDC UPS output for approved devices, and a wired WAN port for failover.
- **Ara**, for hotline destinations, dialing plans, caller ID, line-status monitoring with alerts, and E911 geo-location across every appliance on campus.
- **The one-page white paper**, [90X1 Campus Blue Light Phones (PDF)](https://dataremote.com/documentation/marketing/dataremote-90x1-campus-blue-light-phones.pdf), for the safety committee or the facilities team that needs the summary.

Each campus is different. Station types, wiring condition, closet locations, and cellular coverage all affect the design, so each cluster should be tested on its own before cutover.

## Frequently asked questions

**Do we have to replace our blue light phones when the copper line is retired?**

Not if the station is an analog call box on a two-wire line. The DataRemote 90X1 presents a standard analog line on each of its eight FXS ports, so the tower's existing Tip/Ring pair connects to the appliance and the phone, the strobe, and the dispatch workflow stay as they were. Stations built as IP devices with an Ethernet connection are a different migration and are outside this use case.

**How does a blue light phone place its call through the 90X1?**

One of two ways, matching how the station works today. A ring-down (hotline) station goes off-hook when the button is pressed and the 90X1 line, configured in Ara with a hotline destination, places the call to dispatch immediately. A station with its own auto-dialer sends the stored number as pulse or DTMF digits, which the 90X1 detects automatically. In both cases dispatch sees the caller ID configured for that line.

**What happens to blue light phones during a power outage?**

The 90X1 keeps the line live from an integrated 18-cell, 15 Ah lithium-ion battery rated for up to 48 hours of standby (actual runtime varies with usage), and its 12 VDC UPS output can power an approved connected device. The tower's own electronics and strobe are usually powered separately, so a complete outage plan covers both the line and the station. The FCC notes that traditional copper landlines typically work during power outages while modern alternatives usually need backup power, which is why the battery matters.

**How do we know a station is still working between scheduled tests?**

Through Ara, DataRemote's device management platform, which provides line-status monitoring with alerts for each 90X1 line. A copper pair gave no warning when it failed; with Ara, a station that drops off the line raises an alert. Monitoring supplements the physical button-press test rather than replacing it, since a healthy line cannot detect a failed button or speaker.

**How many blue light phones can one 90X1 serve?**

Up to eight, one per RJ-11 FXS port. In practice the count per appliance is set by how many station pairs terminate in the same wiring closet or enclosure. A large campus usually deploys several 90X1 units, one per cluster of stations, and manages all of them from Ara.

**Does the Clery Act require campus blue light phones?**

No. The Clery Act regulations at 34 CFR 668.46 require an institution's annual security report to state its procedures for students and others to report criminal actions or other emergencies on campus, and its emergency response and evacuation procedures. Blue light phones are one way many campuses provide that reporting path, so a station that cannot connect undermines a published procedure even though the regulation does not name the phones themselves.

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Canonical page: https://dataremote.com/blog/campus-blue-light-emergency-phones-pots-replacement
Organization: DataRemote, Inc. — POTS line replacement, cellular failover, and fixed wireless access solutions. https://dataremote.com