Telephonics Selects Nucleus PLUS for Mission on Military Aircraft

10/7/2004 - Accelerated Technology(r), a Mentor Graphics division (Nasdaq: MENT), announced that its Nucleus(r) PLUS real-time kernel has been used by Telephonics Corporation to develop a secure digital intercommunication (SDI) system that provides high quality audio and secure communications capabilities for fixed wing aircraft, helicopters and ground shelter applications.

Robust and proven, the Nucleus PLUS kernel has been implemented in a large number of military and avionics applications resulting in an established reputation in the embedded aerospace market. The SDI, developed with the Nucleus kernel, has been integrated into systems in three different applications: the 767 Tanker Program, the United States Air Force C-130 aircraft as part of the C-130 Avionics Modernization Program (AMP) and the Swedish Air Force Gripen Fighter.

"We required a proven, reliable kernel to support our mission critical application and the Nucleus PLUS kernel met all of our needs," said Steve Esposito, vice president, business development, Telephonics.

767 Tanker Program
Based on a new, zero occupancy Boeing 767-200 ER passenger airplane, the SDI system consists of two interphone control units (ICU), programmed with the Nucleus PLUS kernel, that interface with each other and with peripheral equipment. The SDI system has the capability to operate under domestic and international regulations in civil airspace, provide military communications capabilities, operate with a navigation database, perform formation and rendezvous flight maneuvers.

C-130 Avionics Modernization Program (AMP)
The SDI system is used in the United States Air Force C-130 aircraft as part of the C-130 Avionics Modernization Program (AMP). The Nucleus PLUS kernel is programmed into two separate devices for the C-130 aircraft: the interphone control units (ICU), and the communications and navigation control panel (CNCP). The ICU provides intercommunications between the crewmembers and the ability to address passengers and crew through cockpit and cargo compartment speakers. The CNCP provides operator/machine interface to enable selection and control of the communication radios. Provided for the pilot and copilot only, the CNCP manages the display and control (i.e. pushbuttons) for both normal and backup modes of operation.

Swedish Air Force Gripen Fighter
As part of the communications system for the Swedish Gripen Fighter, the Nucleus PLUS kernel is programmed into the audio management system (AMS), which constitutes an integral part of the communication system for the Gripen aircraft. The AMS consists of one audio management unit (AMU) and one audio control panel (ACP) for a single seat aircraft and one AMU and two ACPs for a dual seat aircraft. The communication system, powered with the Nucleus PLUS kernel, provides such functions as back-up control of the radios in the event of primary control loss; provides intercom between the pilot, rear seat and crew operators; generates and distributes warnings, tones and speech messages to the pilot; and distributes received audio and signals to the pilot.

About the Nucleus PLUS kernel
The Nucleus PLUS kernel is reliable and scalable; developers can scale the kernel down to as small as 19KB, including both code and data sizes, for the x86 processor. The Nucleus PLUS kernel provides efficient, high-performance task management, inter-task communication, inter-task synchronization, memory management and component query features. Optimizations in system clock, interrupt and compiler register usage are part of the advanced features provided by the kernel. Additionally, the Nucleus PLUS kernel is provided with complete source and without royalty fees.

"We are seeing more and more developers realize the benefits of the Nucleus PLUS kernel in their avionics applications making it the kernel of choice for mission-critical applications. In this case, the robustness and reliability of the Nucleus kernel proved crucial to the development of the communications devices within these aircraft," said Robert Day, director of marketing, Embedded Systems Division, Mentor Graphics.

Availability and Pricing
The Nucleus embedded software is licensed with source code and without royalty fees. Available now, licenses for the Nucleus PLUS kernel start at U.S. $12,495. For more information, please contact Accelerated Technology at 800-468-6853 or

About Mentor Graphics
Mentor Graphics Corporation (Nasdaq: MENT) is a world leader in electronic hardware and software design solutions, providing products, consulting services and award-winning support for the world's most successful electronics and semiconductor companies. Established in 1981, the company reported revenues over the last 12 months of about $675 million and employs approximately 3,800 people worldwide. Corporate headquarters are located at 8005 S.W. Boeckman Road, Wilsonville, Oregon 97070-7777; Silicon Valley headquarters are located at 1001 Ridder Park Drive, San Jose, California 95131-2314. World Wide Web site:

Accelerated Technology, a division of Mentor Graphics Corporation, is located in Mobile, Alabama with sales offices and distributors worldwide. By providing embedded systems developers with a focus on service, well-documented source code and industry-leading non-royalty-based Real-Time Operating Systems (RTOS) software including modeling software, prototyping tools, kernels, middleware and development tools. AT's suite of products shorten time-to-market and provide a complete solution for engineers. For more information, please visit or email us at

Mentor Graphics, Accelerated Technology and Nucleus are registered trademarks of Mentor Graphics Corporation.

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