Occasionally we get only the email, but not the SMS notification, and it seems to be only when the voicemail is empty. Is this behavior by design?
This is not a big problem since it only seems to happen when the voicemail is empty, but we wanted to make sure that's the only time it fails to send the SMS message. I tried to reproduce the behavior by calling and hanging up without leaving a voicemail but it always send both notifications in my testing.
We are a very small company in the US with less than 15 extensions and a very simple setup.