Is That a Virtuous Cycle at Cisco?

The networking giant is scoring by pushing promising new tech, such as VoIP, which then requires customers to upgrade existing systems

In tech industry circles, nothing is more sought after than what's known as a virtuous cycle: a state of existence where one favorable circumstance gives rise to more of the same. That's what Microsoft (MSFT) and Intel (INTC) enjoyed when each new version of Windows required millions of PC owners to buy a computer with the latest Pentium chip. That in turn enabled consumers to buy the latest version of Microsoft Office, which set the stage for the next round of upgrades.

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