JPS6394756A - Decision system for invalid holding call - Google Patents

Decision system for invalid holding call

Info

Publication number
JPS6394756A
JPS6394756A JP24029786A JP24029786A JPS6394756A JP S6394756 A JPS6394756 A JP S6394756A JP 24029786 A JP24029786 A JP 24029786A JP 24029786 A JP24029786 A JP 24029786A JP S6394756 A JPS6394756 A JP S6394756A
Authority
JP
Japan
Prior art keywords
transmission line
time
line
holding
prescribed time
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
JP24029786A
Other languages
Japanese (ja)
Inventor
Hirotake Katayama
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
Fujitsu Integrated Microtechnology Ltd
Original Assignee
Fujitsu Ltd
Fujitsu Integrated Microtechnology 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, Fujitsu Integrated Microtechnology Ltd filed Critical Fujitsu Ltd
Priority to JP24029786A priority Critical patent/JPS6394756A/en
Publication of JPS6394756A publication Critical patent/JPS6394756A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To automatically and accurately decide a transmission of invalid holding by connecting a transmission line of a digital exchange to a detection means in multiple if the holding time of the line reaches a prescribed time or over and using the detection means so as to discriminate the transmission line as invalid holding if the signal level is not detected within a set time.
CONSTITUTION: When subscribers A, B are connected via an A/D conversion circuit 4, a line concentration circuit 5, a primary time switch 1, a spatial switch 2, a secondary time switch 3, a line concentration circuit 6 and a transmission line of an A/D converter circuit 7, if the transmission line is left connected for a prescribed time (e.g., 6 hours), since on state change is caused for both supervisory signals SCN1, SCN2 for a prescribed time accessed by a controller at each prescribed time, the holding state is detected. That is, both the subscribers A, B are hooked off for a prescribed time or over. In detecting and identifying the line cased by holding state, the secondary time switch 3 connects the signal transmission line 11 between the subscribers A, B with other transmission line 12 in multiple.
COPYRIGHT: (C)1988,JPO&Japio
JP24029786A 1986-10-09 1986-10-09 Decision system for invalid holding call Pending JPS6394756A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24029786A JPS6394756A (en) 1986-10-09 1986-10-09 Decision system for invalid holding call

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24029786A JPS6394756A (en) 1986-10-09 1986-10-09 Decision system for invalid holding call

Publications (1)

Publication Number Publication Date
JPS6394756A true JPS6394756A (en) 1988-04-25

Family

ID=17057375

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24029786A Pending JPS6394756A (en) 1986-10-09 1986-10-09 Decision system for invalid holding call

Country Status (1)

Country Link
JP (1) JPS6394756A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023466A (en) * 1988-02-12 1991-06-11 Mitsubishi Denki Kabushiki Kaisha Coaxial starter
JP2007096511A (en) * 2005-09-27 2007-04-12 Oki Electric Ind Co Ltd State management system, ip phone exchange, and state management method
JP2008072378A (en) * 2006-09-13 2008-03-27 Nec Engineering Ltd Ip communication system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5787659A (en) * 1980-11-20 1982-06-01 Nec Corp Line restoration system for telephone exchange network

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5787659A (en) * 1980-11-20 1982-06-01 Nec Corp Line restoration system for telephone exchange network

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5023466A (en) * 1988-02-12 1991-06-11 Mitsubishi Denki Kabushiki Kaisha Coaxial starter
JP2007096511A (en) * 2005-09-27 2007-04-12 Oki Electric Ind Co Ltd State management system, ip phone exchange, and state management method
JP2008072378A (en) * 2006-09-13 2008-03-27 Nec Engineering Ltd Ip communication system

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