CAROLYN ROSS DOUGHTY
Pilots at Wakeman Ave, Wheaton, IL

4582956, Apr 15, 1986

Jul 12, 1983

6/513080

Carolyn A. Doughty - Wheaton IL

AT&T Bell Laboratories - Murray Hill NJ

H04M 1100, H04M 1506

179 2A

Method and apparatus is disclosed for displaying special service information at a selected station during a silent interval between ringing. The apparatus, a data receiver (100), is connected to the tip and ring leads of any well-known station set and comprises a line interface unit (101), a converter (102), a control circuit (103), and a display unit (126). A frequency shift keyed (FSK) signal which represents the special service information is filtered from the ringing signals by the line interface unit. The converter detects the FSK signal and demodulates the special service information from the FSK signal. Upon detection of the FSK signal, the control circuit receives and stores the special service information. The stored special service information is then periodically sent to the display unit to begin exhibiting the information during the silent interval before the next ringing signal.

4551581, Nov 5, 1985

Jul 12, 1983

6/512955

Carolyn A. Doughty - Wheaton IL

AT&T Bell Laboratories - Murray Hill NJ

H04M 1100

179 2A

For use with a telephone switching system serving a plurality of stations and having a central processor for generating data messages and a ringing circuit for generating ringing signals to a selected station, method and apparatus are disclosed for sending a data message to a selected station during a silent interval between ringing signals. The apparatus includes a detector and a sender. Responsive to a first ringing signal, the detector generates a status signal representative of the silent interval between ringing signals. During the silent interval, the sender sends to the selected station a frequency shift keyed signal representative of the data message.