Push-button dial for a telephone

Details Push-button dial for a telephone Push-button dial for a telephone

1983-05-18

1985-04-02

Schreyer, Stafford D.

179 90K, 179 84VF, 179 81B, H04M 126

Patent

active

045089388

ABSTRACT:
A solid state push-button dial circuit in which a push-button key pad uses a simple on-off switch for each key to mute the receiver and open the circuit to the transmitter while a dial tone is being generated. The circuit, when operating with the speaker phone, mutes the speaker phone when the key is depressed. The phone can be easily switched to a polarity-sensitive state in which the tone generator is turned on only if the proper polarity is present on the telephone line.

REFERENCES:
patent: 4406926 (1983-09-01), Duncan

Affiliated with

Also associated with

Rating

Push-button dial for a 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 Push-button dial for a telephone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Push-button dial for a telephone will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1092360