Vonage remained the industry leader with 1.8 million subscriber lines as of 2006. VOIP service cost anywhere from $9 per month for a block of 200 minutes to $44 per month or more for business feature with an included a fax line and custom ring features. The people you call do not need to have a computer to communicate with you. When you pick up the phone with cheap voip and dial a phone number the phone adapter (black box) converts your voice into data and sends the data through the Internet in a similar manner to an email message.

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US subscribers to Internet-based telephone services grew 21% to 6.9 million in the second quarter of 2006. This technology converts the voice signal from your telephone into a digital signal that travels over the Internet. Comcast, which launched its service more slowly than most of its cable rivals, posted a 73% jump in users. A virtual phone is a piece of software that sits on your computer that acts like a regular phone. Most providers require you to have a custom telephone adapter that is pre-configured for their network so providing your own may not be an option.

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You can dial overseas with cheap voip and the rates are very competitive. Virtual numbers are normally an additional cost but can start out at only $4.99 per month and they can only be used for incoming calls. Be aware that some services don't work during power outages and the service provider may not offer backup power. You can have as many lines you want and each additional line is billed at the same rate as a single line.