April 23, 2019
ED-137C/2-4 "Interoperability Standard for VOIP ATM Components - Volume 2 Telephone - Addendum 4"

We are pleased to announce the publication of ED-137C/2-4 “Interoperability Standard for VOIP ATM Components – Volume 2 Telephone – Addendum 4 Override Call.”
The scope of ED-137 is to define the rules for VoIP implementations to support ATM communications and their interoperability. ED-137 is composed of multiple Volumes, each of which is dedicated to a specific application. Volume 2 proposes a profile standard for the use of SIP to establish, terminate and modify speech media sessions of the Ground Telephone Service in an Air Traffic Services Ground Voice Network (AGVN). Volume 2 is composed of a core document describing the basic requirements and a number of addenda dedicated to specifc functionalities. Addendum 4 describes the requirements for Override Calls.

Available on the EUROCAE website.

Related News

Open Consultation for ED-57A

We are pleased to announce the availability of the following draft EUROCAE document prepared by EUROCAE WG-107 DME Infrastructure supporting ...

Welcome to EUROCAE’s New Home

In 2026, EUROCAE will take a major step forward by relocating to its new offices at 2 Avenue François Mitterrand, ...

Call for Experts: WG-134, WG-126 & WG-124

New WG-134 DME Interrogators: Calling All Experts The ED-54 ‘Minimum Operational Performance Requirements (MOPR) for Distance Measuring Equipment (DME) interrogator ...

Open Consultation for ED-14H

We are pleased to announce the availability of the following draft EUROCAE document prepared by EUROCAE WG-14 Environmental Testing: ED-14H: ...

EUROCAE–RTCA Annual Meeting

EUROCAE and RTCA met this week in Washington, D.C. for our annual coordination meeting, where we discussed key global aviation ...

NEWSblog October 2025

Catch up on all the latest updates from EUROCAE in our monthly newsletter, your go-to source for insights into our ...