Electronic long-distance telephone call computer and recorder

作者: Reich L , Graham P

DOI:

关键词: Telephone callCumulative costCost databaseDisplay deviceCall managementComputer scienceSignalCall controlReal-time computingCall volume

摘要: Apparatus for automatically computing and recording the cost of a long-distance telephone call including register cumulatively indicating on digital display being made responding to computer having an input data time period wherein recorder operate in response signal information taken directly from telephone. Additionally, elapsed indicator digitally displays cumulative records all calls made.

参考文章(3)
George A Barnard, Direct charge-rate indicator ,(1971)
Ewan W Fletcher, Costing and timing device ,(1959)
James E Walker, Gamburd Harold, Elapsed time recording device and method ,(1966)