Is it worth investing in internet telephony stocks?

Voiceover Internet Protocol technology enables people to make cheap phone calls over the net. So which companies stand to benefit?

It's good to talk or so advertising campaigns have been telling us for years but it's often very expensive too. Competition may have brought the cost of calls down (unless, of course, you call home from abroad on a UK mobile), but the combination of landline bills, mobile-phone costs and internet charges means our final bills often come in higher than ever before.

No wonder then that the arrival of Voiceover Internet Protocol (VoIP) technology has caused so much excitement: using VoIP which breaks up voices into tiny bits of data and sends them, like an email, over the internet it is now possible to make phone calls via your computer to anyone else's computer anywhere in the world, any time, for free. All you need is a fast-speed internet connection, says Peter Munro in The Independent, and a headset, or special cordless phone.

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