PBX Vs. VoIP

VoIP modernizes PBX

"PBX" means "Private Branch Exchange." It describes a form of telephone network for private organizations which does not cross over the Public Switched Telephone Network (PSTN). Several telephones within the organization are cabled together through a router. Although the network itself is the PBX, the term is often applied to the router. Each telephone in the system is called an "extension." The PBX network is almost always connected to the PSTN. Users can call other telephones in the private network, or enter an escape code to dial out onto the public telephone network.

VoIP

"VoIP" ("Voice over Internet Protocol") converts speech into a digital signal. It breaks these signals up into packets and puts information about the series in the header of each packet. These packets are then sent to their destination over the Internet. The receiving device uses a VoIP program to strip off the headers and reassemble the packets. The assembled digital stream then 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.

IP-PBX

With the creation of digitized packet switched PBX systems, it became clear that phone calls could be run over a data network. This development saw the creation of VoIP PBX, also known as IP-PBX. These systems apply VoIP to private phone networks.

PBX vs VoIP

Applying VoIP to private networks brings advantages of cost and quality. It is not necessary to run two separate networks for data and speech. Smaller organizations which would have found the purchase of a PBX router too expensive can enjoy the benefits of a PBX system by subscribing to a VoIP service. Digitized sound is easier to manipulate with software and so distortion can be erased, and greater line capacity can be achieved through compression.

References

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