US PATENT SUBCLASS 379 / 339
.~ With signal conversion (e.g., dial to DTMF, analog to PCM)

Current as of: June, 1999
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379 /   HD   TELEPHONIC COMMUNICATIONS

338  DF  REPEATER (E.G., VOICE FREQUENCY) {9}
339.~ With signal conversion (e.g., dial to DTMF, analog to PCM)

DEFINITION

Classification: 379/339

With signal conversion (e.g., dial to DTMF, analog to PCM):

(under subclass 338) Subject matter which coverts a signal from variations in one parameter to variations of another.

(1) Note. an example such variations conversion is from that of abrupt variations in a DC signal such as pulses to variations of tone frequency.

SEE OR SEARCH THIS CLASS, SUBCLASS:

281, for signal conversion in a common control system.

353, for control line signalling.