JPS56102139A - Channel selection controlling system - Google Patents

Channel selection controlling system

Info

Publication number
JPS56102139A
JPS56102139A JP449980A JP449980A JPS56102139A JP S56102139 A JPS56102139 A JP S56102139A JP 449980 A JP449980 A JP 449980A JP 449980 A JP449980 A JP 449980A JP S56102139 A JPS56102139 A JP S56102139A
Authority
JP
Japan
Prior art keywords
channel
mobil
receiver
signal
emergency
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
JP449980A
Other languages
Japanese (ja)
Other versions
JPS5925530B2 (en
Inventor
Tomokazu Kai
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP55004499A priority Critical patent/JPS5925530B2/en
Publication of JPS56102139A publication Critical patent/JPS56102139A/en
Publication of JPS5925530B2 publication Critical patent/JPS5925530B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To perform interruptions from mobil stations at an emergency and to improve utilization efficiency, by transmitting a dial tone signal through channel P when channel A is engaged at the central station of a mobil communiction system. CONSTITUTION:When channel A is engaged, switch S1 is changed over from receiver 125 to receiver 124, and the signal from receiver 124 for channel P is supplied to data receiver 133. Moreover, when switch S3 is changed over to transmitter 128 for channel P, a mobil station who wants to talk urgently identifies a channel assigning signal of other stations flowing through channel P and transmits a dial tone signal through channel P. In channel P the dial tone signal is received by data receiver 133 and the signal is decoded. By this, control section 140 separates one of engaged channels and provides it for the emergency mobil station. The control section also connects S2 to data generator 137 for channel A for a short period, informs talking channel No. to the emergency mobil station, and performs necessary processing.
JP55004499A 1980-01-21 1980-01-21 Line connection control method Expired JPS5925530B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55004499A JPS5925530B2 (en) 1980-01-21 1980-01-21 Line connection control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55004499A JPS5925530B2 (en) 1980-01-21 1980-01-21 Line connection control method

Publications (2)

Publication Number Publication Date
JPS56102139A true JPS56102139A (en) 1981-08-15
JPS5925530B2 JPS5925530B2 (en) 1984-06-19

Family

ID=11585745

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55004499A Expired JPS5925530B2 (en) 1980-01-21 1980-01-21 Line connection control method

Country Status (1)

Country Link
JP (1) JPS5925530B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60156003A (en) * 1984-01-26 1985-08-16 Canon Inc Optical element
JPS644133A (en) * 1987-06-03 1989-01-09 Gen Electric Trunk radio repeating system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60156003A (en) * 1984-01-26 1985-08-16 Canon Inc Optical element
JPH0327087B2 (en) * 1984-01-26 1991-04-12 Canon Kk
JPS644133A (en) * 1987-06-03 1989-01-09 Gen Electric Trunk radio repeating system

Also Published As

Publication number Publication date
JPS5925530B2 (en) 1984-06-19

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