Sizing up VoIP servers
3Com, Avaya, Siemens, and Zultys offer rich telephony features, excellent voice quality, and more or less scalability
Prepping for networked telephony
Implementing an IP PBX means confronting a series of technical and management challenges
How we tested
A battery of rigorous hands-on tests revealed the strengths and shortcomings of our four IP PBXes
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