JPS5650659A - Control system at interruption for private telephone exchange unit - Google Patents

Control system at interruption for private telephone exchange unit

Info

Publication number
JPS5650659A
JPS5650659A JP12657179A JP12657179A JPS5650659A JP S5650659 A JPS5650659 A JP S5650659A JP 12657179 A JP12657179 A JP 12657179A JP 12657179 A JP12657179 A JP 12657179A JP S5650659 A JPS5650659 A JP S5650659A
Authority
JP
Japan
Prior art keywords
interruption
subscriber
call
sent
exchange unit
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
JP12657179A
Other languages
Japanese (ja)
Inventor
Akira Hirose
Jun Shimada
Kazuo 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
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP12657179A priority Critical patent/JPS5650659A/en
Publication of JPS5650659A publication Critical patent/JPS5650659A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)

Abstract

PURPOSE:To realize an interruption call without giving any confusion to the subscriber to receive an interruption while talking, by sending the interruption warning tone to the subscriber to receive an interruption prior to the interruption. CONSTITUTION:In case the telephone number dialed by the subscriber A is to the subscriber B or C under talking, the busy tone sending trunk BT0 is started from the CPU and via the signal distributor SD to give a display of the busy state to the subscriber A. In this case, if the terminating subscriber permits the interruption, another busy tone BT1 is sent to show the possibility for the interruption call. Thus the subscriber A requests an interruption call, and thus the exchange unit sets up the channels at the interruption call trunks CFT for the subscribers A, B and C each. And at the same time, the interruption warning tone TNT1 is sent to the CFT. In such way, the interruption warning tone can be sent to the subscribers A, B or C, and an interruption call is carried out after a fixed time.
JP12657179A 1979-10-01 1979-10-01 Control system at interruption for private telephone exchange unit Pending JPS5650659A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12657179A JPS5650659A (en) 1979-10-01 1979-10-01 Control system at interruption for private telephone exchange unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12657179A JPS5650659A (en) 1979-10-01 1979-10-01 Control system at interruption for private telephone exchange unit

Publications (1)

Publication Number Publication Date
JPS5650659A true JPS5650659A (en) 1981-05-07

Family

ID=14938452

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12657179A Pending JPS5650659A (en) 1979-10-01 1979-10-01 Control system at interruption for private telephone exchange unit

Country Status (1)

Country Link
JP (1) JPS5650659A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59165555A (en) * 1983-03-09 1984-09-18 Nec Corp Circuit monitoring system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS506281A (en) * 1973-05-18 1975-01-22
JPS5084108A (en) * 1973-11-27 1975-07-07
JPS5438709A (en) * 1977-09-01 1979-03-23 Nec Corp Offring call connection system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS506281A (en) * 1973-05-18 1975-01-22
JPS5084108A (en) * 1973-11-27 1975-07-07
JPS5438709A (en) * 1977-09-01 1979-03-23 Nec Corp Offring call connection system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59165555A (en) * 1983-03-09 1984-09-18 Nec Corp Circuit monitoring system

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