Tornado WebJet 128K external ISDN adapter is fully compatible with Windows and Mac OS Operating Systems. Access to the Internet through ISDN with the WebJet 128K terminal adapter offers you high-speed access with ease of use at low cost. This external model is extremely user-friendly. The WebJet 128K offers speeds up to 128.000 bps. The compact design makes it 'the must have' under the external ISDN adapters in the market. Up-to-date technology assures full compatibility with all standard communication protocols. Back to top Product Details and FeaturesProduct MPN MPN E4720 Key Features Type ISDN Modem Transmission Line ISDN Interface Serial RS-232 ISDN Terminal Interface BRI Downstream Speed 128 Kbps Enclosure External Platform Mac ? Unix Supported Standards Supported ISDN EURO-ISDN (DSS1/ETSI) Dimensions Height 3.7 cm Width 13 cm Depth 19.5 cm Weight 0.3 kg