Q: Why do I receive a multiple beep tone, which tells me that I have a message, but receive it an hour after the message was left?
One of the features/functionality of the VOIP service is an "audible" reminder that voice mail messages are awaiting if stored on the asterisk server. This audible reminder is hourly.
For example, if a message came at 8am and you were not present or elected not to listen to the message, there would be an audible beep at 9am, 10am, etc. until you listened to the message.
It is occasionally reported as a 1/2 beep and often its sporadic behavior is confusing, for example, 2-minutes after the hour or 25-minutes after the hour... It is associated to the time stamp of the first unheard message.