scope:

This Recommended Standard presents recommendations for voice and audio data communications in terms of:

a) the exchange of voice and audio data between terrestrial facilities;

b) the exchange of voice and audio data between terrestrial and space-borne facilities;

c) emergency voice communications;

d) rendezvous, proximity, and docking operations voice communications;

e) search and rescue (SAR) voice communications.

Audio embedded in video feeds and special payload audio are considered a part of cases a) and b).

This Recommended Standard does not specify:

- individual implementations;

- the underlying mechanisms to perform the communication;

- the management activities required to configure and control the voice systems.

This Recommended Standard also does not address a range of practices that can be characterized as voice etiquette and protocol (roles and positions to talk) and are essential to the successful operation of any voice system, especially a system related to human space flight. Although these practices are out of scope in this Recommended Standard, implementers of voice systems are advised to recognize the need for user training and are encouraged to seek normative voice etiquette and protocol requirements in the mandatory training material for voice systems users in their space agency.