In the converging telecom industry, VoIP PBX system is defined as an innovative new product and service that act as a key element for long distance and international calling at minimal rate. IP PBX is an acronym used for Internet Protocol Private Branch Exchange. It facilitates telecommunication through IP data network. Communication through IP PBX system is through digital packet switching technique rather than a circuit switching technique of conventional telephone lines.
The system allows user to share and transfer the data, voice and video over a single IP network. While sending data through a single IP network increases an efficiency and productivity of communication. Well knowing more about basic architecture of an IP PBX, it includes IP PBX server, one or more SIP phones, VoIP phones and a gateway. Like any other proxy server, hosted PBX system works similar. First thing that a user of SIP or IP phones has to do is to get himself registered with the IP PBX server to make a call to another VoIP or SIP phone. The IP PBX server possesses the information about all SIP or IP addresses, so that they can establish a reliable connection. The process of routing call through PBX server is quite easy and simple as it will connect internal and external call through voice over ip service provider or a VoIP gateway.
The benefits that are attached to VoIP PBX over conventional PBX system are as follows;
1. Voice over IP is easier to install and configure
2. Low maintenance cost
3. Low operation cost
4. Easily handles number of additional phone lines
5. Cost efficiency
6. Facilitate hot desking, roaming, usability and manageability
To avail the benefit of cheaper Internet telephony, users have to avail VoIP PBX systems on their Linux operating. Moreover, modern virtual PBX offers a wider range of handsets and telephone service connection compared to traditional PBX system.