JPS6490626A - Wide range mobile communication system - Google Patents

Wide range mobile communication system

Info

Publication number
JPS6490626A
JPS6490626A JP24581887A JP24581887A JPS6490626A JP S6490626 A JPS6490626 A JP S6490626A JP 24581887 A JP24581887 A JP 24581887A JP 24581887 A JP24581887 A JP 24581887A JP S6490626 A JPS6490626 A JP S6490626A
Authority
JP
Japan
Prior art keywords
digital
mode
signal
stations
random number
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP24581887A
Other languages
Japanese (ja)
Other versions
JPH0473896B2 (en
Inventor
Kazu Moriyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kokusai Electric Corp
Original Assignee
Kokusai Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kokusai Electric Corp filed Critical Kokusai Electric Corp
Priority to JP24581887A priority Critical patent/JPS6490626A/en
Publication of JPS6490626A publication Critical patent/JPS6490626A/en
Publication of JPH0473896B2 publication Critical patent/JPH0473896B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To attain wide range communication forming a radio communication system even with mixture of digital/analog communication systems by using a cryptographic device to a transmitter-receiver of a radio station so as to realize digital squelch. CONSTITUTION:The cryptographic device 5 is provided with selection means No.1 and No.2, the means No.1 selects any of radio lines and a most suitable MODEM 53 thereto in each digital station, and the means No.2 switches control modes A-C of a reception signal output. The mode A is the mode operated when all the stations have the device 5 and only when a random number synchronizing signal is detected in the digital reception output of the MODEM 53 in succession to the preamble signal, a decoded voice is outputted to a speaker 2 as a digital squelch function. The mode B is the mixed communication mode and from which of the digital and analog stations the signal is received is decided depending on the presence of the preamble signal of the receptionsection and the random number synchronizing signal, and both the stations are made receivable. The mode C is the mode receiving a signal sent from the MODEM 53 without using a random number device 52 and the digital transmission is provided to the line.
JP24581887A 1987-10-01 1987-10-01 Wide range mobile communication system Granted JPS6490626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24581887A JPS6490626A (en) 1987-10-01 1987-10-01 Wide range mobile communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24581887A JPS6490626A (en) 1987-10-01 1987-10-01 Wide range mobile communication system

Publications (2)

Publication Number Publication Date
JPS6490626A true JPS6490626A (en) 1989-04-07
JPH0473896B2 JPH0473896B2 (en) 1992-11-24

Family

ID=17139307

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24581887A Granted JPS6490626A (en) 1987-10-01 1987-10-01 Wide range mobile communication system

Country Status (1)

Country Link
JP (1) JPS6490626A (en)

Also Published As

Publication number Publication date
JPH0473896B2 (en) 1992-11-24

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