From Mashable: 3 uncommon reasons small businesses should choose VoIP

1)  No More Wonky Phone Switches

VoIP enables you to get rid of the closet full of hardware and wires, making your phone system cheaper and faster to repair.

2) Better Remote Customer Support

When you get rid of old-fashioned phone equipment, you get rid of rigidly slow, old-fashion phone company customer service.

3) More User-Friendly for Employees

Newer equipment tends to be much more user-friendly, flexible and intuitive to use.

Compared to old systems, VoIP systems are a snap to do things like access your voice-mail in or out of the office, or even accomplish simple tasks such as forwarding calls to a mobile number.

Because VoIP technology is integrated into systems that employees are already using, such as web and mobile devices, they will take to the systems more easily, Moody says.