Telephonic communications – Special services – Call waiting
Patent
1997-03-27
1999-08-31
Smith, Creighton
Telephonic communications
Special services
Call waiting
379142, H04M 342
Patent
active
059463848
ABSTRACT:
A method and apparatus for notifying a user of a call waiting while a telephone is on hold. A transmit signal path and a receive path between a central office line and transmitter and receiver elements in the telephone are muted to place a call on hold. A customer premise equipment alerting signal is received from the central office while the transmit signal path and receive path are muted. The receive path is un-muted after the customer premise equipment alerting signal is received and an audible message signal is generated and inserted into the receive path in response to the customer premise equipment alerting signal to notify a user that the customer premise equipment alerting signal has been received. The receive path is then re-muted.
REFERENCES:
patent: 5007076 (1991-04-01), Blakley
patent: 5263084 (1993-11-01), Chaput et al.
patent: 5649002 (1997-07-01), Brady et al.
International Application Published Under the Patent Cooperation Treaty (PCT), Publication No. WO 96/25816, Publication Date Aug. 22, 1996. PCT International Application Serial No. PCT/US96/01115 filed Feb. 12, 1996. Title: Caller ID and Call Waiting for Multiple CPEs on a Signal Telephone. Applicant: CIDCO, Incorporated.
IEEE Communications Magazine. vol. 31, No. 4, Apr. 1, 1993, New York, United States. Title of Article: "The Analog Display Services Interface". pp. 70-75. Author: Barry K. Schwartz.
Bleile Leonard George
Yee Bruce William
Northern Telecom Limited
Smith Creighton
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