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5. Payback time: As in, you can recoup your investment in a VoIP installation in as little as six months, particularly in cases where you make a lot of international calls.
6. Free conferencing: Conference calls via PSTN services are invariably expensive and usually require participants to call in. Most VoIP services offer conference-calling from between 2-50 people for little or nothing, usually as part of an inexpensive package of business VoIP services that you’re already subscribed to. With these services in place, there’s no sense in continuing to pay for PSTN-based services a moment longer.
7. Free PBX via open-standards projects: The VoIP world’s premier open-source project, Asterisk, is an open-air laboratory for some of the best thinking about how to execute and improve VoIP at every level. You can take advantage of the Asterisk community’s hard work and dedication by downloading the free Asterisk IP PBX (see our Asterisk Crash Course for easy instructions on how to get started). your company can start using VoIP via existing PCs and laptops shortly thereafter, with more VoIP-specific devices to come later.
8. Simplicity: Rather than hire telecom specialists to figure out or expand your PSTN system, you can maintain and improve your company’s VoIP system using the IT specialists you already have on hand.
9. Support that scales: IP PBXs have historically handled dozens of users, but Digium is developing a PBX that will handle hundreds of users simultaneously. For telecom providers, this means an opportunity to provide managed VoIP PBX hosting to businesses, but for the businesses themselves, it means that ever-larger groups of workers and entire companies can easily go to an open-source VoIP product and not look back.
10. It works (almost) anywhere: Although they’re not everywhere yet, WiFi hotspots are rapidly increasing in density and power, a trend that’s getting a boost from the rise of hotspot-sharing services such as Fon. The day is not far off when you can be positively bathed in WiFi as you walk the streets of any reasonably dense city; services like WeFi can show you where the hotspots are, phones that can use WiFi for VoIP calling are already on the market from companies like BroadVoice and Net2Phone, and VoIP/cell hybrids like the Nokia N80 Internet Edition are also expected to be popular. While I despise tech writing that breathlessly promises “a new era” of anything, these technologies and services do herald a much-anticipated period of truly free, truly mobile calling, and it would pay you and your company to be ready to take advantage of it.