Pulse or digital communications – Transceivers – Transmission interface between two stations or terminals
Patent
1997-04-30
2000-04-18
Le, Amanda T.
Pulse or digital communications
Transceivers
Transmission interface between two stations or terminals
375221, 379 9306, 370249, 370463, H04L 1266
Patent
active
06052409&
ABSTRACT:
In a digital communication device adapted to be coupled to a digital network and having an analog port adapted for interconnecting an analog device to the digital communication device, a device for generating and detecting tones, includes: a processor programmed to selectively generate one of a first set of digital tones in a generation mode and to detect one of a second set of digital tones in a detection mode; and a conversion circuit, operably coupled to the processor, adapted to convert the one of the first set of digital tones generated by the processor in the generation mode to an analog tone and transmit the analog tone to the analog device; the conversion circuit further being adapted to convert an analog tone received from the analog device to the one of the second set of digital tones and transmit the digital tone to the processor when the processor is in the detection mode.
REFERENCES:
patent: 4751696 (1988-06-01), Black
patent: 5708663 (1998-01-01), Wright et al.
patent: 5931928 (1999-08-01), Brennan et al.
Lumpkin Todd W.
Nelson Christian Paul
Quirk Patrick J.
Le Amanda T.
Motorola Inc.
Pappas Joanne N.
Powell John W.
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