IP Telephony is the transport of phone calls through the Internet. IP Telephony services are available between computers and telephones. PC-to-PC is suitable for users who already have Internet access and an audio-equipped computer. Software is available for free. Integration with Internet services such as instant messaging and e-mail are provided. PC to telephone uses a gateway for call conversion from digital to analog and analog to digital.
Telephone-to-telephone requires two gateways, GSTN-to-Internet, and Internet-to-GSTN. IP Telephony services are either network-centric or end-system-centric. Mobility features are included in IP Telephony. IP Telephony services use either VoIP or SIP based services. VoIP systems are more popular, and their applications are generally used with a simple microphone and computer speakers. However, IP telephones or VoIP boxes can also be used. In recent years, the quality and reliability of VoIP technology has improved to a great extent, and a vast number of users are opting for VoIP based telephone systems.
IP telephony applications require firewalls to pass their Real Time Transport Protocol (RTP) streams. SIP technology has a better mechanism to tackle this problem. SIP server can act as a registrar, proxy or redirect server. It features an application-server interface, presence support, SMS gateway, simplified accounting and authorization and server status monitoring. Linux based SIP software supports numerous codes and phonebook.
The traditional telecommunication operators have been providing special call services using their existing infrastructure that has been accomplished with Intelligent networking architecture. In IP Telephony, router congestion is the main hindering factor, because the audio quality is not on par with PSTN services. Quality wise, IP Telephony services are yet to match their PSTN counterparts.
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Free Internet Telephony
10 August 2010 8:30 PM |
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There are a number of service providers that provide free Internet telephony. Generally, the Internet access providers provide these services at no additional cost. A broadband connection is the first step towards free Internet telephony. There is software available online that can be downloaded free...
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VOIP Internet Telephony
10 August 2010 8:30 PM |
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VOIP stands for Voice Over Internet Protocol. It is another name for Internet telephony and often known as VOIP Internet telephony. VOIP refers to a process in which audio conversations are routed over the Internet. In case of traditional telephones, voice data flows over circuit-switched...
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IP Telephony
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Transport of telephone calls using conventional telephone devices, computers with multi-media accessories, or dedicated terminals over the Internet are called IP Telephony. It is the most cost effective way of telephoning. Data-oriented and voice-oriented communication has different infrastructures. With the convergence of telecommunication and Internet...
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Internet Telephony
10 August 2010 8:30 PM |
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Internet telephony refers to a technology that allows the Internet to be used a telephone. It is also known as voice over Internet protocol (VOIP) or Internet protocol (IP) telephony. It is one of the most popular technologies these days. It is easy to use....
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IP Telephony Systems
10 August 2010 8:30 PM |
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The Internet telephony system consists of call terminating devices, gateways, gatekeepers or proxies and multi-point conference units. Call terminating devices can be traditional telephones or audio-equipped computers. Gateways are used for transmission conversion of calls into a format transportable over the Internet. Gatekeepers provide centralized...
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Free IP Telephony
10 August 2010 8:30 PM |
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Free IP telephone services are available to make national and international phone calls by using a computer and a mouse. To get these free services, you need a computer with an Internet connection using WiFi, broadband or a dial-up network supported by T-I, DSL, Fiber,...
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Internet Telephony Services
10 August 2010 8:30 PM |
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The advent of Internet has revolutionized information technology around the world. Many new vistas of operations and services are open to the public, which have improved their daily lives. One such new kind of technology is Internet telephony, which uses Internet protocols for the purpose...
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Peer To Peer Internet Telephony
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Peer to peer Internet telephony services allow users to make local as well as long distance calls over the Internet. These calls are routed directly to the receiving computer system and do not use central servers for transferring calls made via the Internet. Peer to...
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Internet Telephony Service Providers
10 August 2010 8:30 PM |
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There are a number of Internet telephony service providers competing in the market. There are a wide variety of services offered by different Internet telephony service providers. For example, if you want to make calls to Europe and Asia, there might be a particular Internet...
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VoIP Solutions
10 August 2010 8:30 PM |
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In a traditional PSTN, the quality of service of the calls and continuous connection are very dependable; so, in order for people to switch to IP telephony, the same quality considerations must be maintained or excelled. With IP telephony consisting of distributed elements, the entire...