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What is VoIP


Voice over IP (VoIP) is to digitalize voice and encapsulate them into packets that can be transmitted on an IP network, i.e., VPN or Internet. This means calls can be made to overseas without the use of traditional PSTN network and thus saving costs.


Basic Concepts of VoIP


VoIP works by representing voice signal in a data packet on an IP network for real time transmition. This means the original voice signal are digitalized and transmitted real time by over an end-to-end connection.


Advantage of VoIP


Saves dramatically on toll calls, minimizing business costs.

Simplifies network environment, enhances communication clarity.

Improves customer relationship and increases competitive advantage

Combines PBX and LAN into one single network.

Provide more functionalities over traditional communication method, high in expandability.


Figure: VPN + VoIP network


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