a wireless phone that can operate on both the 1900 and 800MHz digital networks, and on the 800MHz analog network.
A tri-mode amplifier is when two channels of an amplifier are run independently for midrange/treble, but are also bridged for running a (sub)woofer. It is the same as bridging the amplifier, but you keep the midrange/tweeters on their respective channel outputs.
In the Wi-Fi context, tri-mode refers to devices which are 802.11b, a, and g-compatible. In the mobile context, tri-mode describes a cellular phone that is capable of using analog, digital and GSM frequencies. (See dual band). close