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CM-300/350 Air Traffic Control Radios

General Dynamics CM-300 V2 Air Traffic Control Radio
General Dynamics CM-350 Air Traffic Control Radio
General Dynamics CM-300 UT Air Traffic Control Radio
General Dynamics Switching To Voice Over IP Air Traffic Control Radios Infographic

Air Traffic Control Rackmount Transmitter and Receiver Systems

Air Traffic Control (ATC) radios need to keep pace with the demanding volume of air traffic. Knowing that your ATC radios can perform well in a high stress environment helps to make your job a little less stressful.

  • Winner of FAA’s NEXCOM Segment 2 — The CM-300/350 (V2) VHF/UHF radios are the first deployed in the National Airspace System that support VoIP global standards. Standardized radios mean less costs and more flexibility with your radio equipment.
  • Remote Maintenance and Monitoring lets you support an almost unlimited number of radios from one location.
  • High Reliability - The CM-300 Series radios boast unprecedented Mean-Time-Between-Failure rates, meaning you won’t have to worry about the radio breaking down.

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Product Details

CM-300/350 (V2) Software Defined Radios Features

The CM-300/350 Series Version 2 radios are the latest additions to the General Dynamics family of Air Traffic Control (ATC) radios. Based on the FAA NEXCOM Segment 2 radio requirements, these rack mounted transmitter and receiver systems are specifically designed to meet the dynamic mission requirements of air traffic control centers, commercial airports, military air stations and range installations.

  • FAA's NEXCOM Segment 2 radios
  • IP-based for network connectivity: VOIP, Ethernet
  • ETSI standard compliance for international deployments
  • Advanced multi-mode capabilities
  • Superior performance in congested co-site environments
  • Built upon the highly reliable CM Series platform
  • Front panel keypad/display facilitates setup and maintenance
  • NAS certified
  • Now on the U.S. Air Force-AFFSA Approved Product List (APL)
  • The preferred replacement solution for the U.S. Air Force Air Traffic Control and Landing Systems (ATCALS) Radio Replacement Program

Note: The CM-300 Series radios have replaced the CM-200/CM-400 radios. For support on CM-200/400 radios, please contact us at

CM-350 (V2) UDX VDX Transceiver Features

Designed for transceiver needs with frequency agile co-site requirements, the new CM350 (V2) UDX and VDX ATC radio options leverage the FAA certified CM300/350 V2 series and build on our reputation for quality and reliability and deliver:

  • Embedded Frequency-agile Co-site Filter – Increased RF interference protection without the need for 1 for 1 fixed frequency back-ups – reducing the footprint
  • Optional Touch Entry Display Remote Control Unit – Facilitates emergency back-up communication systems
  • Software-defined Upgradeability – To meet future standards
  • Voice over Internet Protocol (VoIP) – Compliance to EUROCAE ED-137 for standard digital audio interfacing and remote connections
  • Built-in Test – Comprehensive and rapid equipment status information
  • Automatic Switch-over – For back-up power engagement
  • Passive Cooling – No fan means less maintenance, quiet and highly reliable operation
  • 100% Useable Receive Channels – Ensures reliable reception regardless of frequency assignment

CM-300/350 (V1) VHF & UHF Radios

The General Dynamics family of Air Traffic Control (ATC) rack mounted transmitter and receiver systems are specifically designed to meet the dynamic mission requirements of air traffic control centers, commercial airports, military air stations and range installations. Over 12,000 CM-300 radios have been delivered with a fielded Mean Time Between Failure (MTBF) of greater than 400,000 hours, assuring long-term cost savings, system interoperability and consistent, long-term performance.

CM-300/350 (V1) VHF Radios

The General Dynamics VHF Digital Radio series delivers more modes; RF power and a broader frequency range in a single rack mount chassis. Advanced modes, legacy AM voice interoperability, and passive cooling facilitate reliable current and next-generation voice and data requirements.

  • 25kHz AM and 8.33kHZ AM, upgradeable to ACARS and/or VDL Mode 2
  • Meets or exceeds ICAO Annex 10 and ETSI EN 300 676 requirements for 8.33kHz performance
  • No receive degraded channels
  • Passively cooled transmitter; no fan required
  • Demonstrated greater than 400,000 hours fielded Mean Time Between Failure (MTBF)

CM-300/350 (V1) UHF Radios

  • Flexible architecture accommodates both fixed and remote tuned configurations
  • Field configurable embedded cavity filters allow use of external filtering or bypassing
  • Remote control, monitoring, and maintenance by means of a Maintenance Data Terminal (MDT) using interface software installed on a standard laptop computer
  • Passive cooling ensures high reliability operation
  • NEXCOM UHF and SPAWAR contracts



General Dynamics Delivers 5,000TH NEXCOM Segment 2 Radio to FAA

May 24, 2016

General Dynamics delivered the 5,000th CM-300/350 VHF-UHF V2 radio, providing advanced, network-ready ground-to-air communications for the U.S. Department of Transportation’s Federal Aviation Administration’s (FAA) NEXCOM 2 modernization program.

General Dynamics Radios and Secure Wireless Network Support New Deployable Landing System for U.S. Air Force

November 12, 2015

General Dynamics' radios will provide the communications for the new U.S. Air Force Deployable Instrument Landing System (D-ILS). The system will give pilots the precision guidance they need to land at locations where the existing air traffic control system is unavailable or where no infrastructure exists, including temporary airfields in austere, isolated locations.

The First NEXCOM Segment 2 Air Traffic Control Radios by General Dynamics ‘Go Live’ at Lebanon, Missouri, Airport

April 20, 2015

The General Dynamics Mission Systems CM300/350 V2 VHF and UHF air traffic control (ATC) radios are the first radios to go into operation at an airport as part of the Federal Aviation Administration’s (FAA) Next Generation Air-ground Communications (NEXCOM) Segment 2 modernization program.

General Dynamics Radios Approved for Installation and Operation in FAA Towers and Communication Centers Nationwide

July 15, 2014

General Dynamics recently received an In-service Decision certification from the Federal Aviation Administration (FAA) for the General Dynamics CM-300/350 V2 UHF and VHF air traffic control (ATC) radios.

General Dynamics Receives Production Order for New FAA Air Traffic Control Radios

October 7, 2013

General Dynamics C4 Systems received the first production order from the Federal Aviation Administration (FAA) for new software-defined, Voice over Internet Protocol (VoIP) CM-300/350 UHF and VHF air traffic control (ATC) radios, related accessories and training materials.

General Dynamics Awarded Contract for Next-generation Air Traffic Control Radios

April 24, 2012

General Dynamics received a contract from the Federal Aviation Administration (FAA) to deliver radios that allow air traffic control personnel to communicate with commercial and military aircraft throughout the National Airspace System (NAS).


Video: VoIP for Air to Ground Communications in Air Traffic Management — It’s Here!


We currently offer operation and maintenance training for our Air Traffic Control radio products at our Scottsdale facility, which is conveniently located seven miles from Phoenix Sky Harbor International Airport. If you’d prefer for us to come to you, Customer Onsite Training is also available: please contact us for a quote.

Training Topics

  • ATC Radio Introduction
  • Description and Specifications
  • Installation
  • Operation
  • Limited Maintenance

For full syllabus details, please download the CM-300 Radio Training Content Outline [PDF].


Please contact us if you require a formal quote for training class funding.

A minimum of 8 students must enroll for each training course for the course to take place. General Dynamics Mission Systems reserves the right to cancel or reschedule any course due to low enrollment, schedule conflicts, or other reason beyond our control. Changes will be announced a minimum of two weeks prior to the published course date being canceled or changed.