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Pager Gateway Description: ![]() A four digit DTMF (Dual Tone Multiple Frequency, the same as used by tone telephones) code is received at the antenna from a transmission source. A radio or repeater receives the signal and converts it to an audio signal. The audio signal is connected to the Interface (a DTMF decoder/controller ). The Interface is capable of decoding up to 4 programmable codes. If a code is recognized, the Interface will set certain control lines and bits on the bidirectional printer port of the computer. The software (available as shareware in this notebook) on the computer polls the bidirectional printer port and responds to the control line and bit settings. The software has a database that is organized as follows:
The computer initializes the software configured Comm Port and proceeds to dial the commercial pager services to notify the members configured for the particular page group according to the recognized group code that was received. | |||||
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