Measuring 1.0 x 1.0 x 0.3 in., Half-Inch Modem has built-in data pump, modem controller, and onboard International DAA. It provides downstream data speeds from 2,400 bps to 56 kbps and upstream rate of 48 kbps. Consuming 65 mA, it offers 3,000 kV isolation voltage, Digital Line Guard protection, and line-in-use detection. Self-contained TTL interface voice/data/fax modem module is suited for remote monitoring systems, POS terminals, home security, and medical devices.