Nextivity CEL-FI QUATRA EVO and 4000
Nextivity positions CEL-FI QUATRA EVO for supported one- or two-operator solutions and QUATRA 4000/4000i for larger operator-count architectures. These active DAS hybrid systems use network and coverage units with structured cabling and RF distribution, but the exact model, bands, donor source and carrier approvals govern the design.
Select the complete system, not one headline feature
Match devices, software, licensing, infrastructure, retention, integrations and support to the operating requirement before finalizing the design.
Operator needs and QUATRA platform selection
Inventory user populations, carriers, critical locations, voice and data problems, building construction and expected changes. Perform an RF survey by carrier, band and area. Decide whether a single- or dual-operator EVO design or a broader QUATRA 4000 architecture matches the actual requirement.
Confirm the exact regional hardware, supported bands, network units, coverage units, operator capacity, licensing or service and carrier approval path. Product-family names do not guarantee that every carrier and band combination is available at a site.
The survey numbers should drive the platform decision. Carrier and band counts, floor and stairwell coverage targets, and the call and data quality users need decide whether a single- or dual-operator EVO design or the broader QUATRA 4000 architecture fits. Note existing cabling, antennas and head-end space that can be reused, and name who administers the system afterward.
- Carrier and user inventory
- Band-by-band RF survey
- EVO versus 4000 role
- Regional/operator support
Signal source, cabling and coverage-unit design
Engineer the donor source from measured signal and quality, antenna location, interference and isolation. Plan category-cable routes, switch or power requirements, distance, intermediate rooms, coverage-unit density and environmental limits using the current Nextivity architecture.
Design the indoor antenna system from floor plans, wall loss, occupancy and target service. Coordinate pathways, firestopping, grounding, roof work and service access. Separate critical dependencies and document spare ports or units for growth.
Donor antenna location, category-cable runs, rack or closet space, grounding, roof access and power for network and coverage units all constrain each other, so they get resolved together. Verify the exact regional part numbers, band support and operator capacity of the units ordered rather than trusting the family name.
- Donor source and isolation
- Category-cable architecture
- Coverage-unit placement
- Indoor antenna model
| Decision | EVO emphasis | QUATRA 4000 emphasis |
|---|---|---|
| Operators | One or two supported paths | Broader multi-operator design |
| Transport | Approved active hybrid | Approved active hybrid |
| Coverage | Coverage units and antennas | Coverage units and antennas |
| Acceptance | Per-operator RF and service | Per-operator RF and service |
Installation, commissioning and acceptance
Install and label network units, coverage units, cables, donor and indoor antennas by the approved design. Test copper links and RF paths before final commissioning. Use the official commissioning and management tools and do not mirror software packages on the public site.
Validate each intended operator in representative areas using RF metrics and real voice/data workflows. Review alarms, gain, interference, handoff and uplink behavior. Compare results with the baseline and design criteria and document inaccessible or excluded areas.
Gain, antenna aiming and operator settings are the levers that move this system away from its commissioned baseline, so keep them with a named few and repeat the affected measurements after a change. Hold the management accounts in the client’s name, and check release notes against the installed units before updating anything in the chain.
- Cable and RF verification
- Official commissioning tools
- Per-operator acceptance
- Alarm and uplink review
Management, carrier coordination and lifecycle
Deliver unit, antenna, cable and port inventory, RF design, before/after measurements, software and account ownership, alarms, operator status and accepted exceptions. Protect detailed RF and management data in the client repository.
Assign monitoring, subscription, firmware, carrier-escalation and change ownership. Revalidate coverage after carrier spectrum, donor, floorplan, cabling or coverage-unit changes and follow current regulatory and manufacturer requirements.
Closing evidence for this system is the measurement set, with before and after readings by carrier and area, alarms cleared, uplink behavior reviewed, and the inaccessible or excluded areas named. Turn over unit and antenna inventory, cable and port records, account ownership and the escalation path back to the carrier.
- Active-unit and port map
- Protected RF documentation
- Monitoring and firmware owner
- Carrier/change coordination
How we plan and deliver the work
The final design depends on site conditions, existing systems, client policies and the selected manufacturer or platform.
Measure coverage
Walk the building and record carrier signal levels, dead areas and where a donor source could be placed.
Select the platform
Choose the QUATRA model and operator count with the carriers involved, then confirm the approvals needed before ordering.
Cable and mount
Install network and coverage units, run the structured cabling and place antennas following the coverage layout.
Commission and accept
Balance the system, retest coverage in the mapped areas and document results for carrier and owner sign-off.
Information to gather before design
In-building cellular design depends on which carriers matter, what signal exists outside and how the building is constructed, so gather those facts before any platform is chosen.
- Carriers the occupants actually use
- Floors and areas needing coverage
- Outside signal available at the roof
- Building construction and floor materials
- Access to risers and telecom rooms
Frequently asked questions
These are common planning questions. A site-specific answer should be confirmed during discovery and design.
Is QUATRA the same as a passive coax-only booster?
No. It is an active DAS hybrid architecture with network and coverage units plus an RF antenna system.
Can the platform be selected without a carrier survey?
No. Carrier, band, quality and user requirements are essential inputs.
Does Category cabling remove RF design work?
No. Donor and indoor antenna placement, isolation, interference and coverage still require RF engineering.
What should be tested at handoff?
Each operator, representative areas, voice/data workflows, RF metrics, alarms and recovery.
Manufacturer software, firmware and technical files remain on the manufacturer’s official website. We do not mirror firmware files locally.
Scope in-building cellular coverage for your building
Tell us which carriers matter to your occupants and which floors or areas drop calls, then send floor plans and riser access details so the QUATRA platform and donor approach can be evaluated.