IP Telephony uses open standard based internet protocols over the network to transmit voice communication.
IP Telephony provides the facility of consistent communication services to employees in their workspaces whether they are in main campus location, at branch office or working remotely, etc.
IP Telephony system provides the advanced feature that converge the functionality of many different communication methods like data, voice, video and mobile applications into a single system, enabling the users to easily communicate by using any device, media or any operating system.
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IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN).
Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user. Much of IP telephony focuses on that challenge.
IP telephony service providers include local telephone companies, long distance providers such as AT&T, cable TV companies, Internet service providers (ISPs), and fixed service wireless operators. IP telephony services also affect vendors of traditional handheld devices.
Currently, unlike traditional phone service, IP telephony service is comparatively unregulated by government. IP telephony also known as "VoIP" has grown to become one of the most used, and cost effective ways to communicate today.
VoIP is an organized effort to standardize IP telephony. IP telephony is an important part of the convergence of computers, telephones, and television into a single integrated information environment. Also see another general term, computer-telephony integration (CTI), which describes technologies for using computers to manage telephone calls.
Future internet design (FIND) was created in 2006 to empower the research community to design and implement a new Future Internet that builds on knowledge and insight about current network.
The NeTS FIND mainly focus on the three phases. The first phase primarily focuses on the components or parts of the architecture such as new schemes of security, naming or routing. In the second phase of FIND, based on the data of first phase researcher forms teams and proposes overarching network architecture. In the third phase of NeTS FIND involves the implementing of overarching research network architecture, crating code and testing code them through emulation and simulation and then by experimenting with the real users and real data.
FIND is based on the idea that to achieve substantive change in what the Future Internet might be the researcher make the existing internet better through an incremental change.
FIND should consider what would be required in a future Internet and requirements for Future Internet includes the following points
i>Security and Availability
A Future Internet must provide the improved security and robustness.
ii>New Networking Technologies
It involves the importance of wireless brings a focus on mobility, location awareness and processing bandwidth limitations. The emergence of new optical capabilities.
iii>New Computing Paradigm
Future internet must support the computing environment in future which includes many computing devices providing processing, human interfaces, etc.
iv>Application support
Application support must benefit the future complex applications with richer and more advanced set of features.
v>Network Management
A future Internet should be easier to configure, debug and manage, both for the large network provider and consumer.
vi>Economic Concern
A Future Internet should faster investment and the development of new functionality.
vii>Planning For Change
The architecture of Future Internet should allow for evolution and enhancement while preserving the consistency of the architecture.
