FAA Enterprise Network Services (FENS)

The Federal Aviation Administration (FAA) awarded a major $74.3 million initial task order under the FAA Enterprise Network Services (FENS) program to AT&T Enterprise Services in August 2026 to modernize critical air traffic control communications. The FENS program is the FAA’s highly secure, next-generation telecommunications backbone. It handles the extensive network operations required to manage the United States National Airspace System (NAS) safely and seamlessly.

Why FENS is Making News Now

The program has undergone massive shifts and complex contracting overrides recently:

The Prime Shift: Verizon originally won a $2.4 billion FENS award in 2023. Following internal reviews and delays, the FAA pivoted in August 2026, using special waiver authority to award the multi-billion dollar single-source IDIQ program to AT&T to accelerate the deployment. The FAA determined that direct engagement with a Tier-1 telecommunications provider (one that owns core network infrastructure) is essential for mission requirements, providing superior network resiliency, cost efficiencies, and simplified accountability.  Only three Tier-1 telecommunications providers exist in the United States. The FAA stated in the Sam.gov award announcement that AT&T is the only Tier-1 provider currently willing and able to commit resources to meet the BNATCS timeline,  AT&T participated in the original 2020 FENS competitive procurement and recent FAA market research activities, AT&T currently supports FAA's Automatic Dependent Surveillance–Broadcast (ADS-B) and Enterprise Infrastructure Solutions (EIS) programs, providing familiarity with FAA telecommunications requirements and NAS infrastructure, and AT&T possesses necessary Tier-1 core network infrastructure, nationwide footprint, network engineering expertise, and operational capabilities to support approximately 4,500 FAA facilities with 24/7/365 mission-critical operation.

The Modernization Deadline: The network overhaul is being treated with urgency to meet a strict December 2028 deployment deadline for the FAA's overarching Brand New Air Traffic Control System (BNATCS) initiative.

FENS Program Overview

Purpose: FENS is designed to fully replace the aging FAA Telecommunications Infrastructure (FTI), a network legacy dating back to 2002.  A core technical objective is transitioning the NAS away from legacy Time Division Multiplexing (TDM) copper wire technology and onto a modern Internet Protocol (IP) network. Moving to an IP-centric core introduces adaptable point-to-cloud data pathways, vastly expanding network resilience, data routing speed, and situational awareness for controllers. 

Scale: FENS separates traffic into two main informational categories across thousands of locations and connects roughly 4,500 to 4,600 FAA facilities nationwide with round-the-clock operations.

Scope:

• Mission-Critical ATC Operations: This includes real-time radar data, ADS-B aircraft tracking, ground-to-air voice communications, flight strips, and critical weather monitoring.
• Administrative Functions: Simultaneously carries everyday internal agency functions such as payroll systems, employee online training platforms, and official FAA email networks. 

Key Sub-Tier Contractor Roles

Under the FENS program, sub-tier technology vendors and subcontractors provide specialized hardware, software, and localized routing to bridge legacy aviation equipment with the new IP-centric core network.

Because the central backbone relies on massive Tier-1 telecom providers, sub-tier vendors handle specialized tasks that major carriers do not typically build in-house.

Legacy-to-IP Translation: Companies like Frequentis USA deploy niche networking products to act as the physical interface. They translate old-school analog interfaces (such as legacy radar data and traditional radio signals) into modern IP data flows without disrupting active air traffic systems.

Interoperability Standards: Sub-tier hardware ensures compliance with international aviation mandates like ED137, which standardizes how voice communications operate over IP networks.

Network Management Layering: Smaller tech contractors supply specialized software for localized configuration, architecture integration, and specialized network management tools suited for Air Traffic Management (ATM) environments.

AT&T plans to coordinate sub-tier vendors by utilizing its initial $74.3 million task order to establish centralized network engineering, rigorous testing, and structured transition roadmaps.

Technology Integration

As the newly appointed prime contractor, AT&T's strategy centers on managing a highly complex vendor ecosystem without interrupting live NAS operations.

Centralized Systems Engineering and Planning

• Early-Stage Integration: AT&T is using its startup funding specifically for top-level network design, engineering, and testing. They are defining how smaller vendors’ hardware connects to the larger backbone.
• Unified Security Framework: AT&T will establish a single overarching cybersecurity protocol. This ensures that sub-tier solutions (like Frequentis' IP translation tools) meet the FAA's strict operational data security standards.

Coordinating Verizon’s Transition

• Infrastructure Mapping: Because Verizon was shifted from the prime role to a supporting subcontractor, AT&T must map Verizon's existing core network assets alongside its own nationwide fiber footprint.
•  Resource Optimization: AT&T will leverage its status as a massive Tier-1 carrier to split traffic. They will ensure Verizon delivers underlying, high-availability data delivery while AT&T retains control over the final routing and deployment schedule. 

Parallel Phase-In for the 2028 Deadline

• Aggressive Modernization Milestones: To meet the strict December 2028 deadline for the BNATCS, AT&T will coordinate sub-tier vendors to execute upgrades in parallel.
• Dual-Network Operations: While sub-tier hardware translates legacy analog systems into IP data streams, AT&T will coordinate the technical timeline so that old copper connections are phased out only after the new fiber network is tested and certified.

Local Facility Impacts

For local airport facilities—such as Air Traffic Control Towers (ATCTs), Terminal Radar Approach Control (TRACON) centers, and Air Route Traffic Control Centers (ARTCCs)—the transition from legacy infrastructure to AT&T’s next-generation IP network drives several key impacts:

Zero-Downtime Network Cutover

• Parallel Environments: Because grounding commercial flights during an upgrade is impossible, AT&T and its vendors are building digital parallel environments.
• Continuous Operations: Local control towers will maintain existing copper-wire connections active alongside newly installed fiber lines. Critical aviation data switches over to FENS only after the new IP systems are 100% certified.

Massive Hardware and Facility Overhauls

The FENS program does not just update software; it coordinates with a massive broader overhaul of local physical infrastructure:

• Hardware Upgrades: Integration timelines call for installing 5,170 high-speed network connections via fiber, satellite, and wireless networks directly into local facilities.
• New Equipment: Local facility footprints will be upgraded with 27,625 new digital radios, 462 digital voice switches, and 612 new radar systems globally.
• Decommissioning Edge Devices: Local facilities must identify and strip out obsolete, "End-of-Support" routers and switches to meet strict cybersecurity mandates like CISA BOD 26-02.

Surface Awareness Integration

• Digital Flight Strips: Local terminal operations are migrating away from manual paper tracking.
• Runway Safety: The high-bandwidth FENS backbone enables the deployment of the Surface Awareness Initiative (SAI), which uses digital flight strips and enhanced surface surveillance to proactively reduce runway incursions at local commercial airports.

Coordinated Tower Replacements

• Physical Synergy: The FENS deployment is taking place in tandem with massive federal spending. The Department of Transportation has dedicated hundreds of millions of dollars to entirely replace aging ATC towers and TRACON buildings, embedding AT&T's network architecture into the foundations of these new local structures from day one.