5 Cool Functions to Look For in VoIP Phones

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You may not currently have a huge choice in buying VoIP phones. After all, most companies buy phones that work with their PBXs, not the other way around. You're often limited to your PBX vendor's proprietary or third party vendor-certified models -- at least until session initiation protocol (SIP) is mature and ubiquitous enough to become the standard (that might take a while).

More... (http://www.voip-news.com/feature/5-cool-functions-voip-phones-050107/)