Rollover Hunting is a feature that is managed by the Account Manager or Phone Manager. It allows incoming calls to your primary phone line to roll over to the next available line and, if al l lines are busy or not answered, the call can roll over to voicemail. It will hunt through all lines in the group once to find an idle line. You can configure multiple hunt groups and the number of rings before the call is routed to the next li ne. Each hunt group must have a minimum of two lines and a unique primary number. There are three hunt sequence options:
On top of that, they're often expected to provide more advanced functionality through software, like shared meeting collaboration, voicemail to email transcription, and call recording. And lest we forget, many businesses still need a service that will connect to the public switched telephone network (PSTN).

Last, make sure you keep this voicemail account up to date, especially if you have some kind of "out of office" message, telling people where you are. Michael Hyatt updates his voicemail message every day-- it may seem excessive, but it lets his callers know that he regularly checks his voicemail, cares about messages he receives, and is likely to get back to them.
Still, COVID-19 won't last forever and hybrid work may not be right for your business, so keeping in mind core VoIP criteria is important. That means providing voice communications for employees at their desks once they start returning to the office. VoIP systems may also need to support a call center for sales or customer service and support; and they often need to connect with and through a host of other communications channels, such as conference calls, fax machines, mobile communications, text messaging, video conferencing, and wireless handsets.