Voice over intranet based private branch exchange system design

The major drawback of the Electronics Private Branch Exchange System is that it required extra wiring for the installation. This system is not flexible in the manner of moving the extension of a particular user to different location. It neither has the caller ID facility nor the "voicemail" facility when user is offline. To find the solution to overcome the problem the Voice over Internet Protocol (VoIP) technology is used. This research includes an architectural solution to integrate the voice over IP (VoIP) services in Infrastructure management network of an organization as a Private Branch Exchange (PBX) instead of EAPBX system. Voice over Internet Protocol (VoIP) is a technology for voice communication that uses the ubiquity of IP-based networks to deploy VoIP client devices such as desktop IP phones called Session Initiation Protocol (SIP) phone or soft phone, in an increasing number of businesses and homes around the world because IP is the protocol connecting almost all devices. Voice over IP (VoIP) uses the Internet Protocol (IP) to transmit voice as packets over an IP based network.