H - Electricity – 04 – B
Patent
H - Electricity
04
B
379/71
H04B 3/36 (2006.01) H04B 3/10 (2006.01) H04M 3/40 (2006.01)
Patent
CA 1112385
ABSTRACT OF THE DISCLOSURE In a telephone system, compensation for transmission losses over any given section of the transmission path is achieved by inserting at a selected location in the tele- phone transmission path a variable gain amplifier, sensing the amplitude of a multifrequency tone signal transmitted from a tone sending device at a calling telephone station distant from said selected location, and varying the gain of said amplifying means in accordance with the difference between the amplitude of said sensed tone signal and a predetermined reference level determined in accordance with the signal level of the tone sending device. Thus compensation over a section of the telephone transmission path originating at a telephone instrument may be achieved without the requirement for additional equipment provided at the location of said telephone instrument, the standard multifrequency tone sending device conventionally provided at such a telephone instrument for providing switching signals being utilised as the means for generating said tone signal. The variable gain amplifier may comprise a combination of a fixed gain amplifier and a variable attenuator series therewith.
300995
George H. Riches And Associates
Warman Bloomfield J.
LandOfFree
Compensation of transmission losses in a telephone system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Compensation of transmission losses in a telephone system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Compensation of transmission losses in a telephone system will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-881694