JPS54100608A - Circuit control system of time-division digital telephone switchboard - Google Patents

Circuit control system of time-division digital telephone switchboard

Info

Publication number
JPS54100608A
JPS54100608A JP704478A JP704478A JPS54100608A JP S54100608 A JPS54100608 A JP S54100608A JP 704478 A JP704478 A JP 704478A JP 704478 A JP704478 A JP 704478A JP S54100608 A JPS54100608 A JP S54100608A
Authority
JP
Japan
Prior art keywords
circuit
common control
time
control part
subscriber
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
JP704478A
Other languages
Japanese (ja)
Inventor
Takashi Fu
Michimitsu Hattori
Hiroshi Saito
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP704478A priority Critical patent/JPS54100608A/en
Publication of JPS54100608A publication Critical patent/JPS54100608A/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 transfer easily a control signal between a circuit-corresponding part and common control part by using the same calling time slot as that allotted to the circuit-corresponding part at the time of the transmission of circuit information. CONSTITUTION:When a subscriber makes an off-hook, loop detector 15 operates, of which the common control part is informed via multiplexer 20. The common control part allots an adequate time slot to circuit-corresponding part 1-1 and sends out a fixed signal. Dial pulses, detected by detector 15, are sent out to hihgway 4 by way of multiplexer 2. By discriminating dial pulses, the common control part controls time-division channel 6 to connect the originating subscriber to a party subscriber. When it is necessary to send out a ringing, the control bit of the alloted channel is used to allow ringer relay 21 to operate.
JP704478A 1978-01-25 1978-01-25 Circuit control system of time-division digital telephone switchboard Pending JPS54100608A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP704478A JPS54100608A (en) 1978-01-25 1978-01-25 Circuit control system of time-division digital telephone switchboard

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP704478A JPS54100608A (en) 1978-01-25 1978-01-25 Circuit control system of time-division digital telephone switchboard

Publications (1)

Publication Number Publication Date
JPS54100608A true JPS54100608A (en) 1979-08-08

Family

ID=11655042

Family Applications (1)

Application Number Title Priority Date Filing Date
JP704478A Pending JPS54100608A (en) 1978-01-25 1978-01-25 Circuit control system of time-division digital telephone switchboard

Country Status (1)

Country Link
JP (1) JPS54100608A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57185758A (en) * 1981-05-12 1982-11-16 Fujitsu Ltd Fixed connection system for signal channel
JPS60172899A (en) * 1984-02-10 1985-09-06 Nippon Telegr & Teleph Corp <Ntt> Receiving system of selection signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57185758A (en) * 1981-05-12 1982-11-16 Fujitsu Ltd Fixed connection system for signal channel
JPS60172899A (en) * 1984-02-10 1985-09-06 Nippon Telegr & Teleph Corp <Ntt> Receiving system of selection signal

Similar Documents

Publication Publication Date Title
US4059732A (en) Centralized telephone answering apparatus with remote accessing
GB1065540A (en) Circuit arrangement for dial pulse receiving facilities in a telephone exchange system
JPS5672567A (en) Automatic message communication system
GB1283968A (en) Switching systems
GB1352212A (en) Remote control telephone apparatus
JPS54100608A (en) Circuit control system of time-division digital telephone switchboard
GB1352238A (en) Control arrangement for private line communication system
JPS5731257A (en) Network control system
JPS54100607A (en) Circuit common-control system of time-division digital telephone switchboard
JPS5690670A (en) Communication system
JPS5624896A (en) Multipartite telephone set calling system
JPS57121362A (en) Data transmission device
JPS58187050A (en) Automatic dial device
JPS57131157A (en) Absence pretending telephone set
JPS56152393A (en) Multiparty radiotelephony system
JPS5758452A (en) Button telephone device
JPS5689162A (en) Number change guide system
JPS54158106A (en) Incoming switch system to telephone set equipment or picture communication equipment in telephone circuit
GB1043839A (en) Method to mark calls in telephone connections, equipped with automatic call transfer
JPS5461811A (en) Continuous registration system on abbreviated dialing service
JPS56165453A (en) Camp-on system
JPS6425642A (en) Telephone set with response control function
JPS5563162A (en) Subscriber line call signal transmission system
JPS56128060A (en) Calling device
GB1162047A (en) Automatic Telephone System