If your building has an ERCES system installed before 2018, there's a real chance it won't pass your next annual inspection. Fire marshals across the country are enforcing P25 Phase II mandates — and systems that were code-compliant when installed are now failing re-inspection.
This isn't a future concern. Building owners in Atlanta, Houston, Chicago, Dallas, and dozens of other metros are already receiving notices. Here's what's changing, why it matters, and what your options are.
NFPA 1225 (2025) · NFPA 1221 (legacy, still cited) · NFPA 72 · NFPA 1 · IFC 510 · IBC · UL 2524 · FCC Part 90 · NICET ERCES Standard 27 51 29.17 (Sept 2024) · State amendments & per-AHJ contractor packets. Also called ERRCS (Emergency Responder Radio Communication System) in many older AHJ documents — same system, older term.
The Short Version of P25
Project 25 (P25) is a set of standards for digital public safety radio communication developed by the Association of Public-Safety Communications Officials (APCO). It replaced the analog systems most jurisdictions used through the 1990s and early 2000s.
P25 has two phases:
- Phase I (FDMA): The original digital standard. One voice channel per 12.5 kHz of spectrum. Most systems installed between 2005 and 2015 are Phase I.
- Phase II (TDMA): The updated standard. Two voice channels per 12.5 kHz of spectrum — doubling capacity on the same frequency. Most major metro public safety networks have migrated or are migrating to Phase II.
The problem: a Phase I BDA system cannot properly amplify a Phase II signal. The waveform is different. An older system may appear to pass basic signal strength tests while garbling Phase II voice traffic — exactly the scenario that gets firefighters killed when radios fail inside a structure.
NFPA investigations into firefighter fatalities have repeatedly cited in-building radio failure as a contributing factor. P25 Phase II mandates exist because Phase I systems create a false sense of compliance — signal appears present, but voice quality degrades under Phase II modulation.
Why Fire Marshals Are Enforcing This Now
Most major metro public safety networks completed their P25 Phase II migrations between 2018 and 2023. Atlanta's system, for example, runs on a Phase II network. Once the network migrates, any in-building ERCES operating on Phase I BDA equipment becomes a liability.
Fire marshals are responding to this in two ways. Some jurisdictions have issued formal compliance deadlines — building owners have until a specific date to upgrade or face violations. Others are enforcing it through the annual inspection process: if your system fails a Phase II voice quality test, you get a deficiency notice and a deadline to remediate.
In either case, the outcome for non-compliant buildings is the same: a notice of violation, a remediation deadline, and potential occupancy implications if the deadline passes.
How to Tell If Your System Is Affected
Four questions to ask about your existing ERCES:
- When was it installed? Systems installed before 2018 are likely Phase I unless the specs say otherwise.
- What BDA equipment is in use? Pull the equipment records. The manufacturer and model will tell you whether it's Phase I or Phase II capable. Common Phase I-only units include older Comba, Westell, and JMA equipment.
- What is your local public safety network running? Contact your local public safety communications center or fire marshal's office. If they've migrated to Phase II, your Phase I system is non-compliant.
- Has your system been tested recently with a Phase II radio? Annual inspections that only check signal strength (dBm) will miss Phase II compatibility issues. A proper test requires a P25 Phase II portable radio and a bit error rate (BER) test.
What a P25 Phase II Upgrade Involves
The scope depends on your existing system:
| Scenario | Likely Scope | Relative Cost |
|---|---|---|
| Phase I BDA with Phase II upgrade path | Firmware/hardware module replacement | Low |
| Phase I BDA, no upgrade path | BDA replacement, reuse antenna infrastructure | Medium |
| Old passive system, undersized for Phase II | Full system redesign and replacement | High |
| No ERCES installed | New system design, permitting, and installation | Full project |
In most cases where the antenna infrastructure is intact and properly sized, replacing the BDA head-end equipment is the primary work. The antenna runs, cable pathways, and power infrastructure often stay. That keeps cost considerably lower than a full system replacement.
Any upgrade still requires AHJ re-inspection and sign-off. Budget for a re-test after the work is complete — the fire marshal needs to verify compliance before closing the deficiency.
Timelines and Deadlines
If your jurisdiction has issued a formal compliance deadline, treat it seriously. Extensions are not always granted, and the consequences of a missed deadline range from fines to occupancy restrictions. Some jurisdictions are issuing 90-day notices; others are giving 12 months from the date of inspection deficiency.
If you're not sure whether your jurisdiction has a deadline, call your local fire marshal's office directly. The answer takes five minutes and could save you from a surprise during your next annual inspection.
New Construction Considerations
If you're designing a new building, specify P25 Phase II-capable equipment from the start. The cost difference between Phase I and Phase II equipment at the design phase is small. Retrofitting later — after tenant buildout, after finished ceilings, after the fire marshal has flagged a deficiency — is expensive and disruptive.
Also specify equipment with future-upgrade paths. The public safety radio landscape will continue evolving. Equipment that supports software-defined radio (SDR) or modular hardware upgrades gives the building a longer useful life before the next technology transition forces another replacement cycle.
Bottom Line
If your building has a pre-2018 ERCES and your local public safety network has migrated to P25 Phase II, schedule an assessment now. Don't wait for the annual inspection to surface a deficiency — by then you're working against a deadline with limited time to procure equipment, pull permits, and schedule AHJ re-inspection.
The upgrade is often less disruptive than building owners expect. But it requires lead time, especially in markets where certified ERCES contractors are backlogged.
Frequently Asked Questions
What is P25 Phase II in plain English?
P25 Phase II is the digital TDMA upgrade most state public-safety radio networks now run on. It uses the same frequencies as Phase I but doubles capacity by splitting the channel between two simultaneous calls, and it requires radios that explicitly support Phase II TDMA. Buildings that amplify public-safety radio for first responders inside (ERCES / BDA) have to be tuned to the live Phase II channel plan, not Phase I assumptions.
Which states have hard P25 deadlines right now?
The hardest near-term deadline is North Carolina (VIPER): legacy radios were sunset on December 15, 2025. Florida's SLERS-2 cutover finishes statewide on July 1, 2026 (4-phase rollout already in progress). South Carolina's Palmetto 800 goes TDMA-only on July 1, 2027. Tennessee's TACN onboards counties continuously. Georgia adopted the 2018 IFC on January 1, 2025, formalizing ERCES requirements at the AHJ level.
My building has an existing BDA that worked fine — why does it suddenly need an upgrade?
A BDA tuned for Phase I voice traffic loses 3-6 dB of effective coverage when the channel structure shifts to Phase II TDMA. The dB loss varies by building geometry but typically pushes a borderline-passing system below the AHJ's threshold. Plus some state systems (Florida, NC) added entirely new frequencies as part of the cutover, which the original BDA filter never accounted for.
Who pays for the upgrade?
The building owner. ERCES is treated as a life-safety system, which is on the building owner under the local fire code. There are some state grant programs (NC, TX, AL, NY) that cover radio equipment for the responding agency itself, but those don't cover the in-building BDA that amplifies the radio inside your building.
What does an ERCES grid test actually measure?
IFC 510 / NFPA 1225 require minimum signal strength on the AHJ's public-safety frequencies across a grid of test points inside the building. The AHJ specifies the grid spacing, the dB threshold (typically -95 dBm DAQ 3.0), and the percentage of points that must pass (typically 95% / 90%). The AHJ witnesses the test, the grid map becomes part of the closeout package, and the CO is contingent on passing.
How do I find out which P25 system my AHJ uses?
The fire marshal's office is the answer — every AHJ publishes (or hands out) a contractor packet that names the state system, the talkgroup list to test against, and the grid spec. Our first step on every project is pulling that packet and designing to it. We also keep an internal map of every AHJ we currently work with, so we can usually answer the question on the call.
Get a P25 compliance assessment
We'll pull your existing system specs, test against your local public safety network's Phase II signal, and tell you exactly what's needed — before the fire marshal does.