What is a VOIP service?
VoIP stands for Voice over Internet Protocol, or a means to digitally transmit voice calls over an IP network instead of using traditional analog phone lines. In most cases, VoIP service uses a broadband Internet connection and specially-configured VoIP phones to place and receive calls.
What is a PBX?
PBX stands for Private Branch Exchange, and generally refers to a business phone system. A PBX system is generally designed with special features to handle internal call switching, such as transferring a caller to another extension or conferencing in a 3rd party within the same office.
What is a VOIP PBX?
VoIP PBX is a special class of PBX systems that uses voice over IP service to place and receive calls using the Internet.

What is a VOIP Phone?
A VoIP phone is a specially-configured phone that places and receives calls over the Internet instead of a traditional analog phone line. When used as a call center solution, the PBX-integrated phone features of a VoIP phone can increase employee efficiency and help project a professional image. These features can include call transfer, conferencing, call hold, and much more.