Speakerphone sensing circuit

Details Speakerphone sensing circuit Speakerphone sensing circuit

1985-03-29

1987-07-07

Rubinson, Gene Z.

Telephonic communications

Multi-line or key substation system with selective switching...

Switching or supervision feature

379388, H04M 322

Patent

active

046792287

ABSTRACT:
An apparatus for indicating to a central service unit of a telephone system having a central service unit coupled to a plurality of station sets whether a particular station set comprises a speakerphone and the type of speakerphone from among two types of speakerphone, is disclosed. The station set includes a microprocessor controller having an input line coupled to a selected one of a low or high logic level. The input line is connected to an electronic switch which receives interrogation signals from the central service unit. Depending on the logic level to which the input line is coupled and the state of the switch, the central service unit can determine whether the station set comprises a speakerphone and the type of speakerphone.

REFERENCES:
patent: 4196316 (1980-04-01), McEowen et al.
patent: 4456793 (1984-06-01), Baker et al.

Affiliated with

Also associated with

Rating

Speakerphone sensing circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1667162