JPS577667A - Non-answer monitoring system - Google Patents

Non-answer monitoring system

Info

Publication number
JPS577667A
JPS577667A JP8123180A JP8123180A JPS577667A JP S577667 A JPS577667 A JP S577667A JP 8123180 A JP8123180 A JP 8123180A JP 8123180 A JP8123180 A JP 8123180A JP S577667 A JPS577667 A JP S577667A
Authority
JP
Japan
Prior art keywords
relay
called subscriber
trunk
incoming
central controller
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
JP8123180A
Other languages
Japanese (ja)
Inventor
Takao Fujita
Senji Kuroki
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
Original Assignee
Fujitsu 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 filed Critical Fujitsu Ltd
Priority to JP8123180A priority Critical patent/JPS577667A/en
Publication of JPS577667A publication Critical patent/JPS577667A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised

Abstract

PURPOSE:To improve the efficiency of utilization of trunk lines or a switchboard by performing non-answer monitoring by an incoming-side switchboard to a proper time limit which corresponds to the kind of a called subscriber. CONSTITUTION:On calling a called subscriber B, an incoming-side switchboard BX starts non-answer monitoring to a time limit which corresponds to the called subscriber B. At the said time limit without the called subscriber B answering, a central controller CC operates the relay X of an incoming trunk ICT for a certain time through a relay driver RC to intermit a DC supply circuit to a trunk line T through a relay A2. During this period, a relay in operation is released in an outgoing trunk OGT. The central controller CC of an outgoing-side switchboard AX monitors the operation of the relay L of the OGT by a scanning point 3 through a scanner SCN. On detecting the intermit release of the relay L, the central controller CC performs called-subscriber non-answer processing.
JP8123180A 1980-06-16 1980-06-16 Non-answer monitoring system Pending JPS577667A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8123180A JPS577667A (en) 1980-06-16 1980-06-16 Non-answer monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8123180A JPS577667A (en) 1980-06-16 1980-06-16 Non-answer monitoring system

Publications (1)

Publication Number Publication Date
JPS577667A true JPS577667A (en) 1982-01-14

Family

ID=13740673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8123180A Pending JPS577667A (en) 1980-06-16 1980-06-16 Non-answer monitoring system

Country Status (1)

Country Link
JP (1) JPS577667A (en)

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