☆ The GPRS services are classified into 12 service classes as per the duration of the time slots occupied / frame.

☆ Usually 5 time slots per frame are occupied including transmission time slots and reception time slots

☆ Increase in the number of occupied time slots certainly causes the increase in the entire duration of the occupied time slots, so that increased amount of data transmission and receipt are enabled

☆ All the 12 service classes are further classified into higher and lower classes as per the relative duration of time slots

☆ Higher speed data communication can be transmitted with high-class GPRS service by setting high transmission power and setting the duration of the time slots long.