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:
Business phone systems usually allow companies to create as many voicemail boxes as they need. A business might have a company-wide voicemail, one for each department like Sales, Marketing, and Support, and many others for all the individuals in those departments. Only an enterprise voicemail service is capable of handling this task properly.

VoIP stands for Voice over Internet Protocol. Although often used as a synonym for virtual phone numbers, VoIP numbers actually differ from them. While the former use private data centers to route calls over existing land and cell phone lines, VoIP numbers use public internet for routing calls. Both solutions are less expensive than some traditional phone services and they enable you to take and make calls on the go. VoIP numbers are less reliable as they depend on the strength of your internet connection.
The auto attendant feature automatically redirects an incoming call to an extension without the need of a telephone operator, while audio conferencing lets multiple users join a single call. With ring groups, you can share the distribution of incoming calls among group members. As one of the best virtual phone service solutions, VirtualPBX provides ACD queues, an advanced version of ring groups, among its features. Given that it distributes calls to a group of users, this functionality makes managing a call center with large volumes of inbound calls much easier.