ED-137/2C-1 - Interoperability Standard for VOIP ATM Components (Volume 2: Telephone) - Addendum 1

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Issued in March 2019.

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 1 describes the Legacy Interworking of telephone systems applying ATS-R2, ATS-No.5 And ATS-QSIG.

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