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System and device for carrier selection and obtaining telephone calls economic
System and device for carrier selection and obtaining telephone calls economic
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机译：运营商选择和获得经济的电话的系统和装置
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摘要
System and device for carrier selection and obtaining telephone calls economic ".Designed to effect the automatic choice of operator more cost-effective for a particular liaison and agreement with the number called.Day and time to take advantage of any differences in tariffs but after dialing is the direct connection so as not to interfere with the conversation.Characterized by being composed of a system (1) comprising a connector (2) to be connected to the telephone line (L) and a connector (3) to be connected directly to the telephone (T),Normally, and also in case of failure of the supply there is a direct connection between the two connectors (2) and (3),When the block (4) which has a key that opens this connection between them and feeds them to the telephone (T) with the voltage generated by the power supply block (s).The system (1) also has a block (6) which contains sensors that detect when the telephone (T) is off hook and DTMF digits to be able to read the digits (pulsed or Tom) keyboards fromTelephone (T); the block (8) to interface with the telephone central office, executes under the control of the micro processor (7), the functions of the occupation of the line to execute dialing, data transmission.Transmission of DTMF digits, reading DTMF digits, and detection of the call (voltage of Bell); in addition to allow communication of data exchanging in DTMF digits.The micro processor (7) controls other modules through interfaces (I) and also contains permanent memory, which is not lost in the event of a failure of the supply.With the data that allow the choice of the operator more convenient. This memory can be changed through data communication.
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