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. 2021 Feb 19;15:578369. doi: 10.3389/fninf.2021.578369

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Copyright © 2021 Jeancolas, Petrovska-Delacrétaz, Mangone, Benkelfat, Corvol, Vidailhet, Lehéricy and Benali.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Figure A1 — Transmission chain of the telephone recordings. GSM, Global System for Mobile Communications; AMR, Adaptive Multi-Rate; PSTN, Public switched telephone network; PCM, Pulse-code modulation; IP, Internet Protocol; IVM, interactive voicemail from NCH company.