For us, OpenVoice is used for our large voice-only presenter style conference calls. Specifically, we use OpenVoice to host our Virtual TownHalls. How this works is that we publish the conference call-in number and then send an all-staff email with the call-in information. It has been very helpful to gather our staff in all parts of our organization as well as those mobile.
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OpenVoice works really well for large 80+ conference calls. We've hosted over 30+ calls on the system and never once had any service outages. It is a stable platform that works reliably!