JPS54132106A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number
JPS54132106A
JPS54132106A JP4074178A JP4074178A JPS54132106A JP S54132106 A JPS54132106 A JP S54132106A JP 4074178 A JP4074178 A JP 4074178A JP 4074178 A JP4074178 A JP 4074178A JP S54132106 A JPS54132106 A JP S54132106A
Authority
JP
Japan
Prior art keywords
subscriber
hooking
audible tone
telephone exchange
recalling
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
JP4074178A
Other languages
Japanese (ja)
Other versions
JPS6050098B2 (en
Inventor
Susumu Ueda
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 JP4074178A priority Critical patent/JPS6050098B2/en
Publication of JPS54132106A publication Critical patent/JPS54132106A/en
Publication of JPS6050098B2 publication Critical patent/JPS6050098B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To ensure the recalling between the subscribers by identifying the hooking of the subscriber under the talking state through the telephone exchange and then transmitting the audible tone to the subscriber of the remote side to perform exchange. CONSTITUTION:In case subscriber A and B are talking and then A leaves from the receiver with the voice of B incapable to call out A, subscriber B has hooking. Thus, intra-office trunk 4 relays the above state which is then detected at scanner 5 and then identified via common control unit 6. Then the path of subscriber A is connected to oscillator 8 which can transmit the audible tone. With generation of the audible tone, A comes back to the original place to give a voice which can be confirmed by B. With hooking of B, unit 6 releases the path. Thus, both A and B can have recalling to each other.
JP4074178A 1978-04-05 1978-04-05 Telephone switching system Expired JPS6050098B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4074178A JPS6050098B2 (en) 1978-04-05 1978-04-05 Telephone switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4074178A JPS6050098B2 (en) 1978-04-05 1978-04-05 Telephone switching system

Publications (2)

Publication Number Publication Date
JPS54132106A true JPS54132106A (en) 1979-10-13
JPS6050098B2 JPS6050098B2 (en) 1985-11-06

Family

ID=12589049

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4074178A Expired JPS6050098B2 (en) 1978-04-05 1978-04-05 Telephone switching system

Country Status (1)

Country Link
JP (1) JPS6050098B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143971A (en) * 1981-03-02 1982-09-06 Nec Corp Transmission system for busy-back signal
JPH04225658A (en) * 1990-12-27 1992-08-14 Nec Commun Syst Ltd Telephone ringing method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57143971A (en) * 1981-03-02 1982-09-06 Nec Corp Transmission system for busy-back signal
JPH04225658A (en) * 1990-12-27 1992-08-14 Nec Commun Syst Ltd Telephone ringing method

Also Published As

Publication number Publication date
JPS6050098B2 (en) 1985-11-06

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