Zoom 2000/2020/2015/2025/2001/2021/2035/2045 ISDN Driver Windows 9x/ME/NT. Installation file (.exe file) for installation in Windows for all the ISDN product line. This file is for W95/98/NT/ME for Model 2000, Model 2020, Model 2015, Model 2025, Model 2001, Model 2021, Model 2035 and Model 2045.. Do use the latest driver version available, it will help you use the facilities of your hardware easier and better. An old version can create hardware conflicts and errors in function. Try to stay updated with your drivers monthly or sometimes weekly. Chose wisely the specific drivers: motherboards driver, bios, graphic cards drivers, modem drivers and so on. Chose the right driver for your hardware and try to make backups of your system every time you want to make a change.