The invention provides a single-frequency-point multi-channel digital
trunking system which comprises a main
system and a
terminal system, the main
system is connected to the
terminal system, and the main system comprises a power supply board card, a duplex communication board card, a DTMF decoding board card, a channel
distribution board card, a channel exchange board card, a
network communication board card, a
telephone exchange board card, a data board card, an expansion board card and a back board card. The back board card is respectively connected with the power supply board card, the duplex communication board card, the DTMF decoding board card, the channel
distribution board card, the channel exchange board card, the
network communication board card, the
telephone exchange board card, the data board card and the expansion board card; the main system exchanges data with the terminal through the transceiving unit by channel allocation codes, each channel is independent of each other and does not interfere with each other, the channel allocation unit supports multi-channel standby transceiving, the standby transceiving unit can be used for link communication, expansion communication and combination of existing communication equipment, the digital process of radio is accelerated, and the communication efficiency is improved. And radio
digitization, popularization and low threshold are realized.