VOIP

Voice over Internet Protocol (Voice over IP, VoIP and IP telephony) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. The terms Internet telephony, broadband telephony, and broadband phone service specifically refer to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).

The steps and principles involved in originating VoIP telephone calls are similar to traditional digital telephony and involve signaling, channel setup, digitization of the analog voice signals, and encoding. Instead of being transmitted over a circuit-switched network; however, the digital information is packetized, and transmission occurs as IP packets over a packet-switched network. They transport audio streams using special media delivery protocols that encode audio and video with audio codecs, and video codecs. Various codecs exist that optimize the media stream based on application requirements and network bandwidth; some implementations rely on narrowband and compressed speech, while others support high fidelity stereo codecs. Some popular codecs include μ-law and a-law versions of G.711, G.722, a popular open source voice codec known as iLBC, a codec that only uses 8 kbit/s each way called G.729, and many others.

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Skype is for doing things together, whenever you’re apart. Skype’s text, voice and video make it simple to share experiences with the people that matter to you, wherever they...
 
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FreeConferenceCall.com is the most recognized conferencing brand in the world with users in more than 800,000 businesses, including nearly all Fortune 500 companies. Service offerings around the globe with...
 
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The RingCentral platform supports hundreds of thousands of users. It’s designed to handle 2x capacity, and is currently managing over ten billion minutes of voice traffic per year ....
 
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Google Hangouts is a singular communications platform developed by Google to help users initiate and engage in various communications channels, including text, voice or video chats. The platform has...
 
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As the core of the Cisco Collaboration portfolio infrastructure, Cisco Unified Communications Manager is a unified communications call control platform that can deliver the right experience to the right...
 
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Sound more professional and stay connected with Grasshopper, the Virtual Phone System designed for entrepreneurs. Grasshopper works just like a traditional phone system, but requires no hardware to purchase...
 
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IBM® Sametime® instant messaging products integrate real-time social communications into your business environment, providing a unified user experience through instant messaging, online meetings, voice, video and data. With just...
 
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Mitel's solutions portfolio supports the free flow of communication, regardless of location, infrastructure, mode or device.
 
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Telnyx provides a cloud-based platform that offers access to carrier grade voice services over the internet. We are focused on enabling a communication fabric for developers...
 
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Yodel is the first software that gives you a greater kind of flexibility in handling your phone calls, and all this right in your chat platform of choice (e.g....
 
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