JPS55149560A - Manual exchanging system of 4-line type - Google Patents

Manual exchanging system of 4-line type

Info

Publication number
JPS55149560A
JPS55149560A JP5836379A JP5836379A JPS55149560A JP S55149560 A JPS55149560 A JP S55149560A JP 5836379 A JP5836379 A JP 5836379A JP 5836379 A JP5836379 A JP 5836379A JP S55149560 A JPS55149560 A JP S55149560A
Authority
JP
Japan
Prior art keywords
outgoing
trunk
incoming
subscriber
manual
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
JP5836379A
Other languages
Japanese (ja)
Inventor
Shohei Ohashi
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 JP5836379A priority Critical patent/JPS55149560A/en
Publication of JPS55149560A publication Critical patent/JPS55149560A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H04Q3/625—Arrangements in the private branch exchange
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M5/00—Manual exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE:To introduce the manual exchange to the exchanger of four lines in existence, by providing the adding unit having the incoming control circuit, outgoing control circuit and lead-in circuit to the board between the four-line type trunk and the radio unit. CONSTITUTION:When incoming call is present on the line under incoming control from a local station, it is displayed for incoming via the outgoing OD trunk attached with the unit ODTAU on the manual board CD, and the operator catches the corresponding incoming line via the line selection trunk LSU and talks it with the outgoing subscriber. After the end of telephone call, the operator holds the outgoing subscriber with the key operation on the manual stand and starts the outgoing trunk OD and the four line type relay exchanger 4EX via the message channel control trunk TCTU, dials the called subscriber number, talks the subscriber SUB or a subscriber of another local station, and the telephone call is made for the three parties with the next key operation. After that, the operator leaves from the telephone call to complete the manual exchange connection.
JP5836379A 1979-05-11 1979-05-11 Manual exchanging system of 4-line type Pending JPS55149560A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5836379A JPS55149560A (en) 1979-05-11 1979-05-11 Manual exchanging system of 4-line type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5836379A JPS55149560A (en) 1979-05-11 1979-05-11 Manual exchanging system of 4-line type

Publications (1)

Publication Number Publication Date
JPS55149560A true JPS55149560A (en) 1980-11-20

Family

ID=13082227

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5836379A Pending JPS55149560A (en) 1979-05-11 1979-05-11 Manual exchanging system of 4-line type

Country Status (1)

Country Link
JP (1) JPS55149560A (en)

Similar Documents

Publication Publication Date Title
US3014097A (en) Dial controlled intercommunication systems
JPS55149560A (en) Manual exchanging system of 4-line type
JPS5745769A (en) Control signal system for subscriber terminal connection
GB1066589A (en) Telephone switching systems
JPS5664554A (en) Exchange service control system
US3014987A (en) Automatic toll ticketing telephone system
GB1471364A (en) Electronic telephone system
JPS55143858A (en) Information guide system
JPS5728493A (en) Automatic incoming system for extension
JPS55125756A (en) Connection test system for automatic exchanger
JPS57212835A (en) Callout communication system
GB601906A (en) Telecommunication systems
JPS5686596A (en) Transfer system of dial information
JPS55130287A (en) Storing method of carrier circuit for 4-wire exchange device
JPS5525249A (en) Special number exchange system
GB1082734A (en) Land-to-mobile telephone link
GB1454649A (en) Telephone conference arrangement
JPS5373901A (en) Voice trasmission system for date exchange
GB1118589A (en) Improvements in or relating to telecommunications systems
GB798803A (en) Improvements in or relating to automatic telephone exchanges providing automatic transfer service
JPS54159111A (en) Recording system of caller number during absence
JPS56128060A (en) Calling device
JPS5711567A (en) Connecting system of telephone exchange network
JPS5650642A (en) Connection system for mobile radio telephone
JPS55149558A (en) Call back transfer system in private branch of exchange