Title :
Investigation on DID/DOD interface circuit in trunking communication system
Author :
Xuezhi, Tan ; Gang, Zhao ; Zhang Naitong
Author_Institution :
Commun. Res. Centre, Harbin Inst. of Technol., China
Abstract :
This paper introduces a useful direct inward dialing/direct outward dialing (DID/DOD) interface circuit in a trunking communication system, which is controlled by a single-chip microprocessor. The double tone multi-frequency encode/decode circuit and voice integration circuit provides 2/4 wire conversion, voice indication, and DTMF code transmission and reception. The DID/DOD interface circuit provides the automatic access to voice and data communication between the radio subscriber and PABX/PSTN subscriber in a mobile communication system
Keywords :
automatic telephone systems; data communication; land mobile radio; microprocessor chips; network interfaces; private telephone exchanges; telephone networks; voice communication; 2/4 wire conversion; DID/DOD interface circuit; DTMF code; PABX/PSTN subscriber; automatic access; data communication; direct inward dialing/direct outward dialing; double tone multi-frequency encode/decode circuit; mobile communication system; radio subscriber; single-chip microprocessor; trunking communication system; voice communication; voice indication; voice integration circuit; Automatic control; Circuits; Communication system control; Control systems; Data communication; Decoding; Microprocessors; Mobile communication; US Department of Defense; Wire;
Conference_Titel :
Communication Technology Proceedings, 1998. ICCT '98. 1998 International Conference on
Conference_Location :
Beijing
Print_ISBN :
7-80090-827-5
DOI :
10.1109/ICCT.1998.743247
