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.)
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 CorpfiledCriticalInternational Business Machines Corp
Publication of FR2260237A1publicationCriticalpatent/FR2260237A1/fr
Application grantedgrantedCritical
Publication of FR2260237B1publicationCriticalpatent/FR2260237B1/fr
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)
FR7443562A1974-02-011974-12-27Line monitoring cct. - delivers signal during existance of outgoing connection from subscriber to exchange device
GrantedFR2260237A1
(en)
