Calling from a fixed line requires a user to type the country code that one would like to connect to and then proceed to type the state and the city code and then the telephone number.SIP however, is designed to be implemented. Unlike Skype which is already a ready made application, SIP is implemented to create VoIP systems and client applications. By designing your own SIP telephony system, you can choose which type of applications and features you would like your phone system to have.When switching to VoIP for your business, be sure to spend time comparing and evaluating multiple VoIP conference software options. You may be tempted by online offers promising free VoIP conference software. Tread carefully with such offers.You might also hear it called voice over IP (VoIP) or voice over the Internet (VoI). A somewhat synonymous term, IP telephony most commonly refers to voice calls routed over a private intranet or wide area network (WAN), as opposed to the public Internet. Although you need specialized software to make Internet calls, there are a number of free or inexpensive Internet-telephony products. Today, small businesses use Internet telephony primarily for international calls. Soon Internet telephony applications will become more popular.The main reason to choose a small business VoIP system is if you have multiple branches, telecommuters, or remote sales offices that are already connected to a company network. A small business VoIP system will not reduce charges for calls outside the company network, though. To do that, you should turn instead to small business VoIP service.Voice-Over Internet Protocol Service (VOIP) is a technology that breaks up voice signals into data packets and sends them over the Internet. Because it bypasses expensive phone lines, VOIP service is cheaper for providers and the consumer. Virtual PBX, a supplier of hosted business phone services, announced that it has expanded its Open VoIP Peering service to include support of any SIP-compliant phones. This service allows small businesses to take advantage of the robustness and features of traditional hosted PBX services and leverage the cost-effectiveness of VoIP technology. Existing single office with no PBX.This scenario fits the description of only the smallest of offices with perhaps only one incoming line, much like a residential connection. The benefits of VoIP here are not clear-cut. The wonderful advantage of voip is that if a device fails, it’s relatively easy to bypass it just by pointing the servers to another gateway and have them disseminate the information to the client machines, plug cables into another switch, rig up a temporary wireless connection, hang a cable from the ceiling anything works.