JPS5656063A - Call waiting system in digital telephone switch-board - Google Patents

Call waiting system in digital telephone switch-board

Info

Publication number
JPS5656063A
JPS5656063A JP13085979A JP13085979A JPS5656063A JP S5656063 A JPS5656063 A JP S5656063A JP 13085979 A JP13085979 A JP 13085979A JP 13085979 A JP13085979 A JP 13085979A JP S5656063 A JPS5656063 A JP S5656063A
Authority
JP
Japan
Prior art keywords
party
trunk
tone
switch
call waiting
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
JP13085979A
Other languages
Japanese (ja)
Other versions
JPS5943025B2 (en
Inventor
Masaharu Kawaguchi
Shiro Kikuchi
Susumu Shirasawa
Susumu Obara
Toshio Shimoe
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
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP13085979A priority Critical patent/JPS5943025B2/en
Publication of JPS5656063A publication Critical patent/JPS5656063A/en
Publication of JPS5943025B2 publication Critical patent/JPS5943025B2/en
Expired 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 a service trunk and time-division switch by permitting a call waiting service trunk to be used between the incoming connection request of the 3rd party and the 1st hooking of the 1st party and by making other connections by a time-division switch. CONSTITUTION:The 1st party (subscriber) A and 2nd party B are connected together via time-division switch TDS and when the 3rd party C sends a connection request to the 1st party A during their telephone call, the 1st party A and 2nd party B are connected to call waiting trunk TWT via switch TDS according to the indication of the control processor. Further, the 3rd party C is connected to ringing tone trunk RBT to send a ring-back tone. In addition, the 1st party A and 2nd party B are connected in trunk TWT and an incoming display tone is sent to the 1st subscriber A. As the 1st party A performs hooking operation, switch TDS connects the 1st party A to the 3rd party C and the 2nd party B is connected to busy-tone trunk HST to send a busy tone. Then, as the 1st party A performs the hooking again, switch TDS connects the 1st party A to the 2nd party B and the 3rd party C to trunk HST.
JP13085979A 1979-10-12 1979-10-12 Call waiting method in digital telephone exchange Expired JPS5943025B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13085979A JPS5943025B2 (en) 1979-10-12 1979-10-12 Call waiting method in digital telephone exchange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13085979A JPS5943025B2 (en) 1979-10-12 1979-10-12 Call waiting method in digital telephone exchange

Publications (2)

Publication Number Publication Date
JPS5656063A true JPS5656063A (en) 1981-05-16
JPS5943025B2 JPS5943025B2 (en) 1984-10-19

Family

ID=15044359

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13085979A Expired JPS5943025B2 (en) 1979-10-12 1979-10-12 Call waiting method in digital telephone exchange

Country Status (1)

Country Link
JP (1) JPS5943025B2 (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445212A (en) * 1981-10-29 1984-04-24 Gte Automatic Electric Labs Inc. Arrangement for multiple custom calling
US4445211A (en) * 1981-10-29 1984-04-24 Gte Automatic Electric Labs Inc. Arrangement for multiple custom calling
US4446554A (en) * 1981-10-29 1984-05-01 Gte Automatic Electric Labs Inc. Arrangement for multiple custom calling
JPS6223662A (en) * 1985-07-24 1987-01-31 Matsushita Electric Ind Co Ltd Busy tone incoming equipment
JPS62137958A (en) * 1985-12-12 1987-06-20 Nec Corp Terminating circuit while exchange is in busy
JPH04150546A (en) * 1990-10-12 1992-05-25 Canon Inc Telephone exchange
JPH04365252A (en) * 1991-06-13 1992-12-17 Fujitsu Ltd Disconnection informing system for call waiting service
US5857017A (en) * 1990-10-12 1999-01-05 Canon Kabushiki Kaisha Call waiting notifying apparatus

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445212A (en) * 1981-10-29 1984-04-24 Gte Automatic Electric Labs Inc. Arrangement for multiple custom calling
US4445211A (en) * 1981-10-29 1984-04-24 Gte Automatic Electric Labs Inc. Arrangement for multiple custom calling
US4446554A (en) * 1981-10-29 1984-05-01 Gte Automatic Electric Labs Inc. Arrangement for multiple custom calling
JPS6223662A (en) * 1985-07-24 1987-01-31 Matsushita Electric Ind Co Ltd Busy tone incoming equipment
JPS62137958A (en) * 1985-12-12 1987-06-20 Nec Corp Terminating circuit while exchange is in busy
JPH04150546A (en) * 1990-10-12 1992-05-25 Canon Inc Telephone exchange
US5857017A (en) * 1990-10-12 1999-01-05 Canon Kabushiki Kaisha Call waiting notifying apparatus
JPH04365252A (en) * 1991-06-13 1992-12-17 Fujitsu Ltd Disconnection informing system for call waiting service

Also Published As

Publication number Publication date
JPS5943025B2 (en) 1984-10-19

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