What Is the Difference Between VoIP & PBX?

PBX systems can use VoIP

"PBX" stands for "Private Branch Exchange". The phones of a private organization are connected together without recourse to the public telephone network. Generally, PBXs are connected to the public telephone network to enable communication with the outside world. As computing advanced, Packet Switched Networks were introduced into organizations to connect computers.

VoIP

"VoIP"--"Voice over Internet Protocol"--sends speech over the internet by breaking the signal up into packets, after converting it into a digital stream. The receiving computer reassembles the packets and converts the digital message back into sound.

Convergence

IT and telecommunication engineers came to realize that they were running two parallel networks, both transporting information. The development of digitized sound gave the possibility of carrying calls over the data network.

IP-PBX

Combined data and voice Local Area Networks are called VoIP PBX, or IP-PBX. The combination of these services brings PBX systems into the cost range of small businesses. An additional benefit is the ability to route external calls over the Internet, rather than over the telephone network. This improves quality of service and reduces costs.

References

• "Differencebetween.net": Difference Between PBX and VoIP