CALL SIGNAL GENERATING (E.G., RINGING OR TONE GENERATOR):
(under the class definition) Subject matter which produces an electrical signal which actuates a device producing a perceptible signal indicative of the status or presence of a desired call connection.
SEE OR SEARCH THIS CLASS, SUBCLASS:
31, for testing of a line signalling generator.
65, for a single channel telephone carrier system including call signalling.
164, for call alerting in a multiline or key substation.
179+, for call alerting in a polystation line system.
201+, for a special service.
251+, for call signal generation in a centralized switching system. 352+, for substation originated call signal generation.
