JPS56162596A - Digital telephone system - Google Patents

Digital telephone system

Info

Publication number
JPS56162596A
JPS56162596A JP6698480A JP6698480A JPS56162596A JP S56162596 A JPS56162596 A JP S56162596A JP 6698480 A JP6698480 A JP 6698480A JP 6698480 A JP6698480 A JP 6698480A JP S56162596 A JPS56162596 A JP S56162596A
Authority
JP
Japan
Prior art keywords
envelope signal
telephone set
switchboard
obtains
telephone
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.)
Pending
Application number
JP6698480A
Other languages
Japanese (ja)
Inventor
Akira Ishizawa
Takao Ueno
Kazuhiro Hiraide
Hiroshi Nagase
Shunichi Hidaka
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP6698480A priority Critical patent/JPS56162596A/en
Publication of JPS56162596A publication Critical patent/JPS56162596A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To simplify the whole constitution remeakably by utilizing S bits of an envelope signal for origination, call detection display, selection, call display, answer, busy display, etc. CONSTITUTION:At a telephone set 2 side, an envelope signal EI obtained by setting S bits of an envelope signal E to ''1'' is obtained through calling operation and sent to a switchboard 1 side. At a switchboard 1, it is detected to obtain the envelope signal ED, which is sent to the telephone set 2 side. The telephone set 2 detects it and obtains an envelope signal ES through dialing operation to send it to the switchboard 1 side. On the basis of the selection of the telephone set 2, the switchboard 1 obtains an envelope signal ER and then sends it to an incoming side telephone set 3. The telephone set 3 obtains an envelope signal EA through answering operation and then sends it to the switchboard 1 to make a connection between the telephone sets 2 and 3. In this state, calling between the telephone sets 2 and 3 is performed by the envelope signal EC containing the call contents as digital data.
JP6698480A 1980-05-20 1980-05-20 Digital telephone system Pending JPS56162596A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6698480A JPS56162596A (en) 1980-05-20 1980-05-20 Digital telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6698480A JPS56162596A (en) 1980-05-20 1980-05-20 Digital telephone system

Publications (1)

Publication Number Publication Date
JPS56162596A true JPS56162596A (en) 1981-12-14

Family

ID=13331784

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6698480A Pending JPS56162596A (en) 1980-05-20 1980-05-20 Digital telephone system

Country Status (1)

Country Link
JP (1) JPS56162596A (en)

Similar Documents

Publication Publication Date Title
JPS5720040A (en) Radio individual selective calling system
JPS6477353A (en) Land mobile telephone system
JPS5787661A (en) Callout signal transmission system in telephone exchange system
JPS56109051A (en) Prevention system of incorrect usage of mobile set
JPS562778A (en) Data communication unit
JPS5753161A (en) Land mobile radiotelephone exchange system equipped with paging function
JPS5399802A (en) Specific subscriber calling equipment of automatic answering telephone set
JPS57206156A (en) Calling system for information of calling subscriber
JPS56162596A (en) Digital telephone system
JPS53117922A (en) Absence reception voice answer skip system
JPS5630353A (en) Communication system with engaged or absent subscriber
JPS57131157A (en) Absence pretending telephone set
JPS537105A (en) Transmission relay exchange system for aural and facsimile signals
JPS5690670A (en) Communication system
JPS5758452A (en) Button telephone device
JPS52125213A (en) Absence transfer system
JPS6472651A (en) Calling system by character dial
JPS5563162A (en) Subscriber line call signal transmission system
JPS57197951A (en) Voice and data simultaneous connection system
JPS61261953A (en) Telephone unit
JPS5752257A (en) Calling control system
JPS5689162A (en) Number change guide system
JPS56103564A (en) Paging transfer system
JPS54504A (en) Telephone set of number delivery
JPS5513571A (en) Absent subscriber calling system