Voice over IP (VoIP) is a term used in Internet Protocol (IP) telephony for a set of facilities for managing the delivery of voice information using the IP. As the computer network growing towards the converged, the VoIP network has been considered as the perfect platform to carry all media for the multimedia network. VoIP is becoming one of the most popular topics in the current computer and telecomm areas.
The initial revenue-generating application is international long
distance arbitrage in VoIP network, this is a near-term opportunity which will diminish as
the regulatory environment evolves. Eventually,
substatially new services, including multimedia collaboration and other intergrated
voice/video/data services will leverage the advantages of carrying all media on the same
network infrastructure.
The following picture shows an architecture that a terminal is able to make phone calls to another terminals through an IP based network, and a terminal can place a call to a regular phone through a gateway.
VoIP has the ability to make telephone calls and send facsimiles over IP-based data
networks with a suitable Quality of Service(QoS) and a superior cost/benefit. VoIP
solution will not only be cost effctive but the marriage of voice with IP in a single
integrated transport will enable integrated applications in the future such as distant
learning, collaborative whiteboarding, and net-meetings with voice.
Therefore, our team will discuss something about VoIP, the security
and programming issues over this architecture.
Applications on VoIP:
http://www.iptelephony.org/
http://www.americasnetwork.com/