This standard specifies the radio frequency interface for business use digital mobile communication system, including public use, based on TDMA method, which is one of narrow band digital communication systems in 400 MHz band, regulated in the Article 57-3-2 of the Ordinance Regulating Radio Equipment.

TDMA method narrow band digital mobile communication system as private communication network consists of base station equipment and mobile station equipment and performs communication between base station and mobile station or between mobile stations. The communication method shall be TDM/TDMA method, in which radio carrier is multiple-channelized by dividing into frames and by dividing each frame into slots corresponding number of multiplex.

This standard, in fascicle 1 / part 1, focuses on and specifies the interface with 16-level digital modulation (M16QAM) out of modulation methods regulated in the Article described above.

This standard, in fascicle 2 / part 2, focuses on and specifies the interface with 4-level digital modulation (π/4 shift QPSK) out of modulation methods regulated in the Article described above.

This standard, in fascicle 3 / part 3, focuses on and specifies the interface with 16-level digital modulation (16QAM) out of modulation methods regulated in the Article described above.

(Three fascicles)