The Basking Ridge, New Jersey-based company was taken private by Silver Lake Partners and TPG in 2007 for just over $8 billion.
On Thursday, it filed to raise up to $1 billion in an initial public offering. The $1 billion figure in the filing is used to calculate registration fees and the final size of the IPO could be different.
The company did not specify the number of shares it hopes to sell, an expected price range, exchange or ticker symbol.
Avaya sells communications software, equipment and support services. In the six months ended March 31, it posted a net loss attributable to common stockholders of $615 million on revenue of $2.8 billion.
Avaya estimates the total value of the markets it operates in will be worth about $77 billion in 2011, the company said in its S-1 IPO filing with the U.S. Securities and Exchange Commission.
Avaya said it would use proceeds from the IPO to repay some of its debt, redeem preferred stock and pay management termination fees to its sponsors.
Morgan Stanley, Goldman Sachs and JPMorgan are leading the underwriters on the IPO.
(Reporting by Brenton Cordeiro in Bangalore and Clare Baldwin in New York; Editing by Sriraj Kalluvila, Gary Hill)