SHIELD ERCES BDAs for code-required public safety radio coverage nationwide, and Cel-Fi commercial cellular signal boosters for in-building coverage across Atlanta and the Southeast US — designed and commissioned by JB Technologies, a Nextivity Pro Partner.
Nextivity makes two distinct product lines and JB Technologies is a Pro Partner for both. SHIELD ERCES BDAs amplify public-safety radio bands (700/800 MHz P25, VHF, UHF, FirstNet Band 14) to deliver code-required in-building coverage for fire and police radios — governed by NFPA 72, NFPA 1221, IFC 510, and your local AHJ. Cel-Fi (GO, PRO, QUATRA) amplifies commercial LTE and 5G cellular bands for tenant voice and data coverage in offices, hotels, warehouses, and medical buildings. The two systems are technically and regulatorily separate, but many Atlanta-area buildings need both, and JBT designs and bids them together when that's the right shape for the project. Nationwide for SHIELD ERCES because public-safety coverage is code-driven and we travel for it; Atlanta and the Southeast US for Cel-Fi commercial work where our trucks are already on the ground. Predictive RF design with Nextivity's WAVE tool, formal carrier consent paperwork, AHJ acceptance-test documentation, and clean closeout packages on every deployment.
NFPA 1221 / IFC 510 compliant Bidirectional Amplifiers for public-safety radio coverage. Channelized (Class A) for surgical band-pass on assigned channels, broadband (Class B) for wider AHJ-mandated coverage. UL 2524 / ULC-S2599 listed.
NFPA-compliant 12 / 24-hour battery backup, supervised circuits, and fire-alarm-style annunciator for the building lobby per AHJ. We install and document the full supervised loop, not just the BDA head end.
Carrier-specific commercial cellular boosters for small offices, retail spaces, and single-suite buildouts. Carrier-approved channelized boost with no carrier paperwork friction. JBT registers the install on your behalf.
Smart in-building cellular booster for medium spaces. Plug-and-play deployment, Nextivity WAVE-tested coverage modeling, integrated remote monitoring. Sized to single-floor offices and clinics.
Hybrid active DAS for enterprise-class buildings — multi-carrier, multi-floor, fiber-fed distribution from a Network Unit (NU) to multiple Coverage Units (CU). The right tool for hotels, hospitals, and high-rise office.
The current-generation Cel-Fi Pro smart booster — carrier-aware, network-managed, and Nextivity WAVE-optimized for medium offices and clinics. Replaces the legacy P18 in deployments where Wi-Fi-managed configuration and remote operational telemetry matter.
The Cel-Fi RS3 (Repeater System 3) is Nextivity's newer-generation residential-and-small-commercial multi-band booster, replacing the legacy RS2. JBT installs RS3 for executive home offices, single-suite professional spaces, and small-clinic deployments where a full Pro EXA or QUATRA is oversized for the coverage area.
Nextivity's predictive RF / coverage modeling platform. JBT runs every Cel-Fi and SHIELD bid through WAVE during design so coverage targets are documented before procurement, not discovered at commissioning.
Roof-mounted donor antennas (yagi, log-periodic) feeding a passive DAS of plenum-rated coax, dome and panel antennas, and signal-balanced splitters / couplers — engineered to match the coverage model and the building's RF environment.
schools, hospitals, mid-rise office, and assembly occupancies where the AHJ requires a BDA before C/O — SHIELD Class A or Class B sized to the building.
SHIELD retrofit when an annual fire-marshal grid survey shows coverage gaps in stairwells, basements, or interior corridors that block first-responder radio.
Cel-Fi QUATRA EVO or 6000 distributed across multiple floors and tenant suites — paired with structured cabling and the existing ERCES SHIELD where required.
Cel-Fi QUATRA for guest rooms, meeting space, and back-of-house — and SHIELD when the local AHJ also mandates public-safety coverage for the property.
Cel-Fi GO or PRO for forklift / picker tablet cellular reliability inside metal-clad buildings where outdoor signal does not penetrate.
Both lines: SHIELD ERCES for code compliance plus Cel-Fi for clinician on-call cellular, patient connectivity, and visitor coverage.
our technicians are trained on SHIELD ERCES BDA configuration, Cel-Fi commissioning, and Nextivity WAVE design — eligible for distribution pricing and priority technical escalation.
SHIELD for ERCES code compliance plus Cel-Fi for tenant cellular — designed together when the building needs both, not sequenced as two separate projects.
NFPA 72 / 1221 / IFC 510 paperwork prepared correctly the first time so the fire marshal acceptance test does not slip the C/O.
every bid runs through the WAVE predictive tool so coverage targets are documented at design, not discovered at commissioning.
FCC Part 20 carrier consent, registration, and the carrier-approval submission — JBT files it as part of the deployment.
trucks dispatched from our Atlanta shop for Cel-Fi work; we travel for SHIELD ERCES BDA installs where AHJ codes mandate coverage.
review the AHJ requirements for ERCES (NFPA 72 / 1221, IFC 510), measure public-safety and commercial-cellular donor signal, and identify coverage targets per area.
model SHIELD BDA or Cel-Fi placement against the building's RF environment until coverage targets are met on paper before any equipment is ordered.
select SHIELD Class A vs Class B vs the right Cel-Fi tier, design the passive DAS, finalize antenna locations and cable runs, and submit drawings to the AHJ for ERCES jobs.
file FCC Part 20 carrier consent paperwork for Cel-Fi installs, pull electrical and low-voltage permits, and align with the AHJ on acceptance-test timing.
rooftop donor antenna mounting and grounding, plenum coax pathways, IDF rack-mount of the BDA / NU, indoor antenna placement, and signal-balanced commissioning to the WAVE model.
fire-marshal acceptance-test grid for ERCES, carrier-approval submission for Cel-Fi, as-built drawings, RF readings per band, and a service-agreement for the annual re-test cadence.
Two distinct product lines. SHIELD is Nextivity's ERCES / public-safety BDA platform — it amplifies public-safety radio bands (700/800 MHz P25, VHF, UHF, FirstNet Band 14) and is installed to satisfy NFPA 72, NFPA 1221, IFC 510, and the local AHJ. Cel-Fi is Nextivity's commercial cellular line — Cel-Fi GO and Cel-Fi PRO for small spaces, Cel-Fi QUATRA 4000 / 6000 / EVO for enterprise multi-carrier in-building cellular. JBT is a Pro Partner for both lines and selects the right product per building.
SHIELD is purpose-built for ERCES code compliance: NFPA 1221 / NFPA 72 Class A and Class B configurations, FirstNet Band 14 support, ULC-S2599 listed, integrated annunciator and battery monitoring, and a clean status interface that AHJ inspectors recognize. The acceptance-test paperwork is straightforward, which matters because a failed AHJ acceptance test is the most common reason ERCES projects slip. We still spec ADRF or other BDA brands when the AHJ has a documented preference, but SHIELD is JBT's default for greenfield ERCES.
Cel-Fi QUATRA is a channelized booster — higher gain per carrier with formal carrier approval, and it scales further than passive boosters. WilsonPro is passive multi-carrier and faster to deploy in smaller buildings. Active DAS (CommScope, Corning) is the right answer at stadium and high-rise scale but is much more expensive and carrier-dependent. JBT picks the tool that matches the building: Cel-Fi GO or PRO for offices and small commercial; QUATRA EVO or 6000 for mid-rise enterprise and hotels; WilsonPro for fast multi-carrier deployments; active DAS at the very top of the market.
Pro Partner is Nextivity's certified-installer tier. It means our technicians complete Nextivity's training on SHIELD ERCES BDA configuration, Cel-Fi commissioning, RF survey methodology, and carrier registration workflow. Pro Partners get priority technical escalation, eligibility to quote at distribution pricing, and access to Nextivity's WAVE design tool for predictive coverage modeling. It is not just a marketing label — it determines what we can buy and what we can install under warranty.
No — SHIELD is purpose-built for public-safety bands (700/800 MHz P25, VHF, UHF, FirstNet Band 14). It does not boost LTE or 5G commercial cellular. For commercial cellular you need Cel-Fi (GO, PRO, QUATRA), WilsonPro, or active DAS. Many Atlanta buildings install both: SHIELD for ERCES code compliance plus a Cel-Fi QUATRA system for tenant cellular coverage. We design and bid the two together when the building needs both.
Yes. Carrier consent is required under FCC Part 20 for industrial signal boosters, and Nextivity maintains the carrier approvals that allow Cel-Fi to be installed cleanly. JBT handles the registration paperwork, the carrier-approval submission, and the final acceptance-test documentation as part of every Cel-Fi project so the building owner has a complete compliance trail when the carrier or AHJ asks.
Deep-dive content on JBT's specific Nextivity service capabilities — Cel-Fi commercial cellular boosters across Atlanta + the Southeast and SHIELD ERCES public-safety BDA nationwide — plus side-by-side comparisons with the most-asked-about alternative cellular platforms.
Tell us about your facility — SHIELD ERCES, Cel-Fi commercial, or both — and we will scope WAVE coverage, sizing, and compliance paperwork.
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