Emerging Technologies Emerging Technology Overview Emerging technologies are those which are just beginning to be adopted or are at the initial acceptance stage, and are expected to make a significant contribution to the world of IT and the businesses that implement them. Voice over IP VoIP (voice over IP - voice delivered using the Internet Protocol) is a term used in IP Telephony for a set of facilities for managing the delivery of voice information using the Internet Protocol. This means sending voice information in digital form in discrete packets rather than in the traditional circuit-committed protocols of the public switched telephone network (PSTN). A major advantage of VoIP and Internet telephony is that it avoids the tolls charged by ordinary telephone service. Voice over IP In addition to IP, VoIP uses the real-time protocol (RTP) to help ensure that packets get delivered in a timely way. Using public networks, it is currently difficult to guarantee Quality of Service (QoS). Better service is possible with private networks managed by an enterprise or by an Internet telephony service provider (ITSP). How VoIP Works Using VoIP, an enterprise positions a "VoIP device" at a gateway. The gateway receives packetized voice transmissions from users within the company and then routes them to other parts of its intranet (local area or wide area network) or, using a T-carrier system or E-carrier interface, sends them over the public switched telephone network. Ways to Talk with VoIP 4 common ways Most vendors support all of these options VoIP – Option 1 – Computer to Computer This is the easiest way to use VoIP. No long distance charges. Several companies offer free solutions You need a microphone, sound card, speakers, and high speed Internet NOT suitable for business! VoIP – Option 2 – Computer to Telephone This method allows you to call anyone (who has a phone) from your computer. Requires a software client. The software is typically free, but the calls may have a small per-minute charge. VoIP – Option 3 – Telephone to Computer A few companies are providing special numbers or calling cards that allow a standard telephone user to initiate a call to a computer user. The caveat is that the computer user must have the vendor's software installed and running on his or her computer. The cost of the call is normally much cheaper than a traditional long-distance call. VoIP – Option 4 – Telephone to Telephone Through the use of gateways, you can connect directly with any other standard telephone or IP telephone in the world. SSL VPN SSL VPNs will provide better connectivity for remote user VPN’s (as opposed to site-to-site IPSec VPN’s). SSL VPNs require only one open port on the firewall. SSL VPNs create a portal for the users to go to with their applications – based on domain policies. MPLS Multiprotocol Label Switching (MPLS) is a standards-approved technology for speeding up network traffic flow and making it easier to manage. MPLS involves setting up a specific path for a given sequence of packets, identified by a label put in each packet, thus saving the time needed for a router to look up the address to the next node to forward the packet to. MPLS MPLS is called multiprotocol because it works with the Internet Protocol, Asynchronous Transport Mode (ATM), and frame relay network protocols. MPLS allows most packets to be forwarded at the layer 2 (switching) level rather than at the layer 3 (routing) level. MPLS makes it easy to manage a network for quality of service (QoS). For these reasons, the technique is expected to be readily adopted as networks begin to carry more and different mixtures of traffic.