It was only a matter of time before Wi-Fi and VoIP met up and joined forces in your business. They've come together in the form of Session Initiation Protocol phones. This very flexible protocol has become a top choice for VoIP applications. Chances are, if you have a VoIP setup, it already includes SIP protocols. Theoretically, you can plug any SIP-enabled VoIP phone into your SIP-based VoIP setup.

The newest of those phones is the Zultys (www. zultys.com) WIP2 wireless IP phone, a full-featured phone with voice encryption, paging and three-way conferencing. WIP2 includes everything you'd expect in a high-end VoIP phone, and it lets you prowl around the premises using the Wi-Fi capability. Pricing hadn't been set as of press time. Like the WIP2, ZyXEL's $230 (street) Prestige P-200W (http://us. zyxel.com) is 802.11b-compatible. There are a few small trade-offs, though. Expect your talk time to be limited to about four hours, and remember, you can only talk when you're within range of a Wi-Fi access point. In other Wi-Fi and VoIP news, Vonage (www.vonage. com) has tested a Wi-Fi handset that works with its service and should be available by the time you read this. Look for more Wi-Fi VoIP phones to hit the market as demand builds.

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