RadTac Manager Server - Version 5.2.5 The best Radius Server for Windows NT. It is a I.S.P. Software. RadTac support all radius NAS as Ascend and Cisco. Manages Access with timed Plafond, calculating connection time. Use of Internal User Database of Windows NT Server (PCD and BDC).Use of Internal Group Database of Windows NT. Manages Rechargeable Access (ex. Initial 40 Hours and Recharge Card of the value in hours).