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.
However, for many businesses, there's a need to route calls to the PSTN and other analog phones. This may mean a PSTN gateway, or even a hybrid PBX, where there's at least a small telephone switch located at your office. Your VoIP vendor will let you know if this is necessary at the planning stage. Note that these days, a PBX looks exactly like the other servers in your data center, except with an attached means of handling local and analog phones.

Users of VirtualPhone.com applaud the company for its international calling features. Some users report frustration with customer service delays. These delays seem to be especially frustrating for customers experiencing billing issues. This problem should probably be considered when deciding between this and other companies.
The voicemail message can be anywhere between 10- 25 seconds. Keep it as short as you can because the prospects need to hear the vital details in it.