FR2260237A1 - Line monitoring cct. - delivers signal during existance of outgoing connection from subscriber to exchange device - Google Patents

Line monitoring cct. - delivers signal during existance of outgoing connection from subscriber to exchange device

Info

Publication number
FR2260237A1
FR2260237A1 FR7443562A FR7443562A FR2260237A1 FR 2260237 A1 FR2260237 A1 FR 2260237A1 FR 7443562 A FR7443562 A FR 7443562A FR 7443562 A FR7443562 A FR 7443562A FR 2260237 A1 FR2260237 A1 FR 2260237A1
Authority
FR
France
Prior art keywords
switching
subscriber
line monitoring
outgoing connection
existance
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
FR7443562A
Other languages
French (fr)
Other versions
FR2260237B1 (en
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of FR2260237A1 publication Critical patent/FR2260237A1/en
Application granted granted Critical
Publication of FR2260237B1 publication Critical patent/FR2260237B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/04—Recording calls, or communications in printed, perforated or other permanent form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Meter Arrangements (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

The line monitoring circuit comprises a first switching through device which responds to an outgoing connection from other switching through devices, which in turn respond to an incoming connection from the first switching through device. It comprises further a switch connected to the first switching through device. Upon responding it delivers a preparation signal to a monitoring device. A second switching through device delivers a signal for the monitoring device operation, so long as the subscriber maintains the connection to the exchange. The device's output signal gives the duration of the outgoing connection. The device is easily installed within existing telephone exchange equipment.
FR7443562A 1974-02-01 1974-12-27 Line monitoring cct. - delivers signal during existance of outgoing connection from subscriber to exchange device Granted FR2260237A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US43893074A 1974-02-01 1974-02-01

Publications (2)

Publication Number Publication Date
FR2260237A1 true FR2260237A1 (en) 1975-08-29
FR2260237B1 FR2260237B1 (en) 1978-11-24

Family

ID=23742623

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7443562A Granted FR2260237A1 (en) 1974-02-01 1974-12-27 Line monitoring cct. - delivers signal during existance of outgoing connection from subscriber to exchange device

Country Status (4)

Country Link
JP (1) JPS50119509A (en)
DE (1) DE2460991A1 (en)
FR (1) FR2260237A1 (en)
IT (1) IT1027865B (en)

Also Published As

Publication number Publication date
JPS50119509A (en) 1975-09-19
FR2260237B1 (en) 1978-11-24
IT1027865B (en) 1978-12-20
DE2460991A1 (en) 1975-08-14

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Legal Events

Date Code Title Description
ST Notification of lapse