Method of communicating data from remote devices to a central computer via a telecommunications link

摘要

A method for communicating data from one or more remote computerized coin telephone auditing devices to a central computer via a telephone line, which comprises the steps of receiving input data signals at a remote computerized auditing device, decoding the input data signals into digital data, and processing and storing the data signals. The digital data are then retrieved. The processing, storing and retrieving steps are accomplished by reading and writing the digital data from volatile memory to a non-volatile memory, and from non-volatile memory to volatile memory. The digital data is coded into corresponding output data signals, and are transmitted to the central computer via the telephone line. The receiving and transmitting steps are accomplished by the exchange of a predetermined sequence of data signals, whereby the remote computerized device and the central computer correctly identify each data signal. Finally, the method periodically disrupts the method for a predetermined time period, whereby power consumption by the remote computerized device is temporarily disrupted.