Driver for mini-modem usb TS 9989 (Telsec-Siemens). Siemens WM USB Modem MC75. The TS-9989 mini-modem are easy to use, small and light, can be connected to a desktop computer or notebook. They both use a standard USB interface and do not require any external power. Their uniqueness can also be attributed to the simple, yet, modern design and flexibility within a range of operating systems such as Windows 2000, XP, VISTA, Linux and Macintosh OS X.