☆ Channel Encoding Scheme is based on a convolution code at various code rates and GMSK modulation

☆ The table below summarizes the options:

☆ Coding Scheme Speed

CS-1 8.0

CS-2 12.0

CS-3 14.4

CS-4 20.0

☆ The least robust and fasted coding scheme is CS-4 and is available near a Base Transceiver Station

☆ The most robust coding scheme is CS-1 and is used in case of mobile station is further away from a BTS

☆ A speed of 20.0 Kbit/s/time slots can be achieved with CS-4 and has 25% normal cell coverage

☆ A speed of 8.0 Kbit/s/time slots can be achieved with CS-1 and has 98% of normal coverage