Four major record companies have brought legal action to force Irish ISP Eircom to stop its networks being used for the illegal downloading of music, according to The Irish Times.
This is the first case in Ireland where internet service providers have been targeted rather than individual illegal downloaders.
The case has been brought by EMI Records (Ireland), Sony BMG Music Entertainment (Ireland), Universal Music (Ireland) and Warner Music (Ireland), and will be dealt with by Ireland's Commercial Court.
Eircom is Ireland's largest broadband ISP.
The record companies claim that illegal downloading of music is a major factor in their rapidly declining sales in Ireland. They want the court to order Eircom to implement filtering and blocking technology to help keep illegal downloads off its networks.
The Irish Times reported that Eircom lawyers had claimed the company had no legal obligation to monitor traffic on its networks.