In telecommunications, T-carrier, sometimes abbreviated as T-CXR,'s the generic designator for any of several digitally multiplexed telecommunications carrier systems originally developed by Bell Labs and used in North America, Japan, and Korea. The basic unit of the T-carrier system's the DS0, which has a transmission rate of 64 kbit/s, and's commonly used for one voice circuit. The E-carrier system, where 'E' stands for European,'s incompatible with the T-carrier (though cross compliant cards… (More on Ds-3)