Telephone instrument

Details Telephone instrument Telephone instrument

1986-09-19

1988-03-15

Schreyer, Stafford D.

Telephonic communications

Substation or terminal circuitry

For loudspeaking terminal

323224, H04M 160, H04M 1900

Patent

active

047318317

ABSTRACT:
Featurephone III Provides a line powered loud speaking telephone which meets BSI standards for current drain.
To maintain the instrument at a fixed position on a V/I curve a constant current drain is provided across the line form which the instrument amplifier is fed. Accordingly, regardless of amplifier power requirement variations, current drain from the line is constant.

REFERENCES:
patent: 4644579 (1987-02-01), Whittaker

Affiliated with

Also associated with

Rating

Telephone instrument does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Telephone instrument, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Telephone instrument will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1930683