Telephonic communications – Terminal accessory or auxiliary equipment – With circuit connection to terminal
Patent
1995-10-23
1996-08-27
Hofsass, Jeffery
Telephonic communications
Terminal accessory or auxiliary equipment
With circuit connection to terminal
379399, 379387, H04M 100
Patent
active
055509177
ABSTRACT:
An interface device between a public telephone (9) and an external terminal (14), the public telephone (9) having a control circuit (10) connected to a telephone line (20) and the interface device having a connector (15) accessible to the user. A switching circuit (22) makes it possible to switch the line (20) either to the control circuit of the public telephone (10), or to a connector control circuit. An information circuit of a connection of the external terminal is in the connector, a first electrical insulation module (21) is located between a connector control circuit and the switching circuit (22), a second electrical insulation module (19) is between a connector control circuit and the control circuit of the public telephone (9) and a control circuit of the connector (16).
REFERENCES:
patent: 5105460 (1992-04-01), Williams
patent: 5272747 (1993-12-01), Meads
Patent Abstracts of Japan-vol. 013, No. 333, Jul. 26, 1989-JP 10097047-Apr. 14, 1989.
Patent Abstracts of Japan-vol. 010, No. 061, Mar. 11, 1986-JP 60212059-Oct. 24, 1985.
French Search Report-FA 483407-FR 9303007-Nov. 29, 1993.
Chiang Jack
France Telecom Etablissement (Autonome de Droit Public)
Hofsass Jeffery
LandOfFree
Interface device between a public telephone and an external term does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Interface device between a public telephone and an external term, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interface device between a public telephone and an external term will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1062155