★ The data rate for the radio channel is 270 kbps

★ The data rate is split into 8 full rate or 16 half rate traffic channels, along with signaling channels

★ In order to have the maximum chance for detecting and correcting errors, the code is complex in a typical propagation path

★ Forward Error Correction is applied in order to get the speech coder encryption, coding and interleaving in a sophisticated way

★ The data is sent as bursts in 577 mus time slots. Each contains 116 encrypted bits

★ Every TDMA frame consists of 8 or 16 time slots

★ Transmit time slots are staggered, so that at some instant the mobile station will not receive the same instants while transmitting, which enables the simplifying the filtering requirements

★ At least one spare slot between transmit and receive is available with this scheme.