Dual-mode speaker telephone

Details Dual-mode speaker telephone Dual-mode speaker telephone

1996-05-06

1997-10-07

Zele, Krista M.

Telephonic communications

Substation or terminal circuitry

For loudspeaking terminal

379389, 379391, 379420, 379430, H04M 100, H04M 900

Patent

active

056756410

ABSTRACT:
An apparatus and method for operating a speaker telephone in either full-duplex mode or half-duplex mode. In the absence of an earphone connection, the speaker telephone operates in half-duplex mode to prevent undesired feedback of speaker output to microphone input. Upon detecting insertion of an earphone plug into an earphone jack, the speaker telephone transitions to a full-duplex mode of operation. Upon detecting removal of the earphone plug, the speaker telephone reverts to the half-duplex mode of operation. The speaker telephone includes a controller configured to detect an earphone insertion event and enable full-duplex operation in response. The controller enables half-duplex operation upon detecting earphone removal.

REFERENCES:
patent: 4912758 (1990-03-01), Arbel
patent: 5263083 (1993-11-01), Rust et al.
patent: 5349635 (1994-09-01), Scott
patent: 5396486 (1995-03-01), Scott
patent: 5448637 (1995-09-01), Yamaguchi et al.
patent: 5450618 (1995-09-01), Naddell et al.
patent: 5488657 (1996-01-01), Lynn et al.
patent: 5504812 (1996-04-01), Vangarde

Affiliated with

Also associated with

Rating

Dual-mode speaker telephone does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2363677