scope:

Purpose of This Notice.

a. This notice advises affected parties of the FAA's intent to discontinue the provisioning of Time Division Multiplexing (TDM)-based telecommunications services for use by NAS and NON-NAS systems. This notice also provides guidance to NAS programs and system owners on developing plans to standardize on the use of both Ethernet interfaces and the Internet Protocol (IP) for voice and all data communications and information exchanges.

b. The NextGen (ANG), Air Traffic (ATO), and Finance and Management (AFN) organizations have established a joint working group to work with the management teams and key stakeholders to identify high-level impacts and develop a strategy through 2025 to help the agency meet these goals. These combined working groups will work together to prioritize and help shepherd affected users through the process.

c. This notice directs programs and systems owners to standardize on the use of both Ethernet interfaces and the IP protocol for voice and all data communications and information exchange. For programs that are planning any improvements before 2025, each program will be required to assess and address the impacts of this notice as they progress through the Joint Resource Council (JRC) and Capital Investment Team (CIT) funding. The AJM-31 telecommunications review processes will integrate these assessments as programs progress through the JRC milestone. Programs that are planning improvements and only going to the CIT will work directly with ANG-B2 to aid the program performing the assessment. Programs affected by this policy, but were not planning improvements, will also work with ANG-B2 and AJM-31 to assess the impacts to be potentially submitted for funding for this specific improvement. The outcome of the assessments must show the specific impacts of this notice and note them as distinct line items when combined with other funding requests in the JRC or CIT.