The trend of private equity firms buying out high tech companies continues. According to Bloomberg News, Silver Lake Partners and TPG will take Avaya Inc. (NYSE: AV) private for $8.2 billion -- the biggest LBO of a computer networking firm ever.

Investors will receive $17.50 a share. That's 4.7% more than yesterday's closing price and 28% more than before speculation about a purchase surfaced on May 29.

This is the latest in a string of high tech LBOs. Recent ones include:

• Acxiom Corp. (NASDAQ: ACXM), this computer and database services provider, said May 16 it's being bought by Silver Lake and ValueAct Capital Partners LP for about $2.24 billion.
• Alltel Corp. (NYSE: AT) this fifth-biggest U.S. wireless service, agreed May 21 to be bought by TPG and Goldman Sachs Group Inc. (NYSE: GS) for $27.5 billion.
• CDW Corp (NASDAQ: CDWC) agreed on May 30 to be acquired by Madison Dearborn Partners LLC for $7.3 billion.

I am not sold on the competitive advantages that will result from this deal. Maybe there's some overhead to be cut but I question how much private equity is willing to invest in R&D to jump start Avaya's product pipeline.

Peter Cohan is president of Peter S. Cohan & Associates, a management consulting and venture capital firm. He also teaches management at Babson College and edits The Cohan Letter. He has no financial interest in the securities mentioned in this post.