Voice Over Internet Protocol is a name of a family of technologies that allows transmission of voice over an established network connection. What is usually discussed, though, is Internet Telephony - bidirectional voice (and lately video) transmission over public networks.

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Open source chat protocol that handles voice & video?

I'm looking for a chat protocol which: Has easy to use clients which will run on both Windows and Linux. Has a server which I can run myself on Linux (preferably easy to set up). Supports duplexed ...
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What does a device with 4 FXS mean?

If an analog telephone adapter is advertised as having 4 FXS ports, what does that mean to me? Can I connect 4 different phones to it? If it doesn't have an FXO port, can I connect it to the public ...
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VOIP/Skype/GoogleVoice solution without a PC

In short, I'm looking to drop current VOIP provider (Cablevision/Optimum Voice) and go with cheaper standalone package BUT want to keep existing standard phone that plugs into their box. Does anyone ...
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How to create account balance for each users in asterisk freePBX system? [closed]

I have an asterisk server up and running. Users connect via extensions(IAX2). How do i create balance account for these users? any help would be appreciated.
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Receive and route phone calls through computer

I volunteered to work for a political campaign. We want to make a unified number (with multiple lines) to put as contact us number. We want it to work like customer support numbers, you call a fixed ...
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How to associate a softphone with a phone url

I'm trying to get click to call to work using Qutecom for a softphone and a Greesemonkey script to turn phone numbers into clickable urls. Whenever I click on the phone number link I get an error ...
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Video chat software for Ubuntu

Is there any video/audio chat program available for Ubuntu 9.4 apart from Skype ?
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Can you run DSL and T1 through a single switch for two different purposes?

I'm not quite sure this works, but my co-worker says it will. Details first: We have a small office of less than 10 PCs, and we use VOIP for our business phone line. All PCs require internet access. ...
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633 views

What are the internal workings of Google Voice?

I am new to Google Voice and am interested in how it works internally so I have few doubts about it. Is the Google Voice number itself a SIP number? How does Google Voice receive calls from any PSTN ...
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How can I call from my PC?

Is there a way to just take a number of some web page and dial it? Perhaps route it via my iPhone? The scenario I am talking about is this: let's say I am looking for an apartment on craigslist. ...
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Any plugins for Skype that support “Soundboard” usage?

I would like to find a program or plugin for Skype that allows you to pipe sound samples in to the outgoing audio stream when you are on a call. Ideally it would have some sort of soundboard ...