Combined analog/digital ccis data transmitter/receiver circuit

Details Combined analog/digital ccis data transmitter/receiver circuit Combined analog/digital ccis data transmitter/receiver circuit

H - Electricity

04

J

354/233, 354/235

H04J 3/12 (2006.01) H04Q 1/39 (2006.01)

Patent

CA 1269173

COMBINED ANALOG/DIGITAL CCIS DATA TRANSMITTER/RECEIVER CIRCUIT ABSTRACT OF THE INVENTION Common channel interoffice data transfer circuitry is shown for transmitting and receiving both analog and digital CCIS data. This data transfer circuitry is a data terminal equipment control circuit. The terminal equipment control circuit is microprocessor controlled. The terminal equipment control circuit is adaptable to transfer CCIS data to analog interfaces, such as modems. The circuit is also adaptable to transfer CCIS data to and from digital data sources, such as digital trunks or T1 spans. The design of this circuit possesses a high degree of commonality and, therefore, requires a minimal amount of components.

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