Compensation of transmission losses in a telephone system

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

179 1CN, 179170A, 179170R, H04M 176, H04B 310

Patent

active

043202578

ABSTRACT:
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 telephone transmission path a variable gain amplifying means, sensing the amplitude of a multi-frequency tone signal received from a standard multi-frequency tone sending device located at a point in the telephone transmission path distant from said selected location, said tone sending device being adapted to emit multi-frequency tone signals within the voice frequency band at a predetermined reference level, and varying the gain of said amplifying means in accordance with the difference between the amplitude of said sensed tone signal and the said predetermined reference level. In order to provide compensation over a section of the telephone transmission path originating at a telephone instrument, without the requirement for additional equipment provided at the location of said telephone instrument, the standard tone sending device conventionally provided at such a telephone instrument may itself be utilised as the means for generating said tone signal. There is also described a telephone system enabling the establishment of a transmission path via a plurality of tandem connected telephone links, each established via a telephone switching system, provision for compensation of transmission losses being provided at a plurality of locations in said transmission path, in order substantially to reduce transmission losses throughout the system.

REFERENCES:
patent: 2154579 (1939-04-01), Parrott
patent: 3302175 (1967-01-01), Deracinois et al.
patent: 3360748 (1967-12-01), Fish et al.
patent: 3838230 (1974-09-01), Bohman et al.
patent: 3918003 (1975-11-01), Seidel
patent: 4017695 (1977-04-01), Jaconetty et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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.

Rate now

     

Profile ID: LFUS-PAI-O-1642886

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.