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Enterprise networks are evolving rapidly. Once they had only to accommodate data transmission with a completely separate system for telephony. Then came integration with the internet and the rise of Virtual Private Networks (VPNs) that exist conceptually above the physical infrastructure, followed by web services and all manner of transmissions using Internet Protocol (IP) format including, more recently, Voice over IP (VoIP). Enterprises are demanding ever-improving service quality and performance while costs are held down. Senior business executives are increasingly aware of the advantages and opportunities that can flow from closer integration of this range of technologies.
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