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US7567658B1
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Method to verify designation of pay telephone with an interexchange carrier
|
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US6014433A
|
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Dynamic escrow type detection system
|
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US5557089A
|
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Card reader system and method of operation
|
|
US5513738A
|
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Coin handling system
|
|
JPH06197181A
|
|
Telecommunication system
|
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EP0587259A2
|
|
Modular telecommunications system.
|
|
US5400400A
|
|
Pay telephone architecture
|
|
US5960072A
|
|
Method and apparatus for altering the access format of telephone calls
|
|
US5351290A
|
|
Telecommunications fraud prevention system and method
|
|
US5388680A
|
|
Coin handling system with an improved coin chute
|
|
US5159698A
|
|
SMDR translator
|
|
US5090548A
|
|
Coin handling system
|
|
US5113433A
|
|
Method and apparatus for altering the access format of telephone calls
|
|
US5048079A
|
|
SMDR translator
|
|
US5093858A
|
|
Method and apparatus for performing an automated collect call
|
|
US5131027A
|
|
Short time validity storage
|
|
US4920558A
|
|
Method and apparatus for downloading speech files
|
|
US4933966A
|
|
Method and apparatus for performing an automated collect call
|
|
US4933965A
|
|
Short time validity storage of a billing account number at a local telecommunications station
|
|
US4920562A
|
|
Automatic generation of billing records at a telephone paystation
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