By David B. Wilkerson

CHICAGO (Dow Jones) -- Charter Communications has filed for Chapter 11 bankruptcy protection, following through on the intentions it announced in February, under the terms of an agreement with some of its creditors, the operator of cable-television systems said Friday.

St. Louis-based Charter (CHTR), controlled by Microsoft co-founder Paul Allen, has said it plans to continue operations as usual.

As it said last month, the company has agreed to implement a financial restructuring that will reduce its debt by about $8 billion. Charter, one of the largest U.S. cable operators with 5.5 million customers, carries a crushing long-term debt load of more than $20 billion.

Also Friday, Charter said that cash on hand and cash from its operating activities will be sufficient during the restructuring so that it won't have to seek debtor-in-possession financing, which tends to carry much higher interest rates and fees in the current credit environment.

The company has also filed a series of customary motions that will allow it to continue to offer employee wages and benefits, honor current customer programs without interruption, and pay certain balances and fees to local franchise authorities in areas where it maintains cable systems.

Earlier this decade, Charter got hurt more extensively than its cable competitors by satellite broadcasters. The company had many systems that were late in adopting state-of-the art two-way capability, and the satellite companies targeted Charter systems in those areas.

It also had a poor customer service reputation that it has had to work hard to overcome.