Method and apparatus for restricting credit card communication calls
作者： Victor A. Franco
DOI:
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摘要: A method and an apparatus are disclosed to enable a public switching network limit the geographical calling area of calls charged credit card. When card call is originated, called party number included as part validation request. The compared against numbers stored in restriction table 320 previously entered by owner accepts or denies result this comparison.
lens.org 参考文章(3)
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