This document specifies requirements and recommendations for using simultaneous interpreting delivery platforms at communicative events where the interpreters are not at the same venue as participants, speakers and signers. In cases where interpreters are at the same venue as participants, speakers and signers, ISO 20109 shall apply to ensure a high level working environment and the acoustic performance of the overall conference system. In conjunction with ISO 20108, this document provides requirements and recommendations for ensuring the quality of sound and images and their transmission to interpreters and from interpreters to participants, and for the configuration of the interpreter’s working environment.