The sale of Avaya is just the latest in an increasing number of private-equity buyouts of technology companies that might not be good things for customers.

The $8.2 billion deal announced today will take the company private and likely come with financial burdens that could sap the market-leading seller of corporate telecom gear of money needed to keep the company’s edge, experts say.

"When private equity shows up it's more about financial engineering, than it is about sort of products and synergies and those sorts of things,” says Samuel Wilson, an analyst with JMP Securities.

“Typically these deals load the company up with debt with significant restraints on operations and cash flow and demands for a better output,” says Francis McInerney, managing director of North River Ventures. “Technology development falls off because cash flow goes somewhere else.”

Over the past year, private equity firms seem to be buying up more technology companies, such as Avaya, Agilent Technologies, Alltel, First Data, CDW, Acxiom Corp. and Primax Electronics to name a few.

The good news is that if things do go awry, they usually happen slowly and they don’t send products or services into a tailspin. “It could be slow at first. It could be imperceptible,” McInerney says.

Technology companies are regarded as iffy investments because the products and the markets are so complex, experts say. But with an abundance of money to invest, the equity firms are willing to take more risks, he says. “It shows desperation on private equity’s part looking for deals, and at some point you run out of the deals private equity ideally looks for,” McInerney says.