composer manuellement un numéro(Dial in to the audio conferencing provider from your physical telephone when the audio conferencing provider service cannot call you)
Conférence rendez-vous(A feature that merges public switched telephone network (PSTN) and Voice over IP (VoIP) conferences, which allows participants to dial in to a conference from anywhere as an authenticated user without having to be on the corporate network. Typically, a local number is provided to avoid long-distance fees)