For North American TDMA and CDMA phones, dual-band indicates that the phone will work in both the 800/850 MHz band and the 1900 MHz band. Most current TDMA phones in the U.S. are tri-mode ...
They built their classic 35-Type station dial around a single-transistor oscillator; each key pressed would switch two different tapped inductors into the circuit to produce the dual-tone audio ...
An 802.11 (Wi-Fi) router that uses the 2.4 GHz and 5 GHz frequency bands. Prior to 802.11n, dual-band routers handled 802.11a users in the 5 GHz band, while simultaneously supporting 802.11b and ...