Its emerged that in 2007 gardai sought a system to automatically record telephone calls and radio traffic from the Garda communications system at Letterkenny Garda Station.
Letterkenny Garda station was one of 27 stations for which Garda sought the system.
The system, which included hard drives to store recordings of communications, allowed Gardai with certain credentials to log in from remote locations and listen to calls recorded at local stations.
It's believed the Gardaí paid just over half a million euro for the system.
Meanwhile details have emerged of what appears to be the first court case affected by the garda phone taping revelations.
Lawyers for two Limerick men charged with IRA membership are seeking confirmation as to whether telephone calls made by their clients from garda stations were recorded.
It remains to be seen if any convictions in Donegal will be challenged if it can be proven calls into or out of Letterkenny Garda Station were recorded.