New Delhi: Swedish telecom equipment company Ericsson has filed a petition in the Supreme Court for contempt of court against Anil Ambani, the chairman of Reliance Communications, after the firm failed to pay Rs 550 crore to Ericsson to settle the dispute over dues.

RCom had to pay the amount to Ericsson by September 30, but the company approached the Supreme Court seeking a 60-day extension. As Ericsson did not agree to the extension, it has now filed a contempt of court petition.

Supreme Court will be hearing the plea of RCom on October 4 whereas a date is not finalised for Ericsson. However, sources say Ericsson's petition can also be taken up on October 4.

Meanwhile, the National Company Law Appellate Tribunal will hear the matter on October 3. The tribunal has asked the parties to settle the disputes.

To pay the debt, RCom has already sold its tower and fibre business to Reliance Jio. However, marketing of spectrum to Jio has not received clearance from the Department of Telecommunications yet.