Telephonic communications – Special services – Repetitive call attempts
Patent
1997-09-03
1999-11-16
Zele, Krista
Telephonic communications
Special services
Repetitive call attempts
379207, 379266, 379221, H04M 164, H04M 348
Patent
active
059871121
ABSTRACT:
A call-back service is disclosed having reduced post-dial delay. When a caller (12) initiates dialing of an international number of a called party (14), a dialer (28) monitors the dialed digits. Upon detecting a code corresponding to an international number, the dialer immediately launches a call to a node (16) in the caller's local exchange (18) while retaining the digits dialed by the calling party. The node then signals a call-back service platform (24) in a call back-country via a frame relay link (22) to launch a call through an ISDN network (26) back to the dialer. Thereafter, the dialer sends the digits to the call-back service platform which then launches a second call to the called party. The first and second calls are then bridged. By launching the call from the dialer upon detecting an international code in the number dialed by the calling party, the post dial delay is reduced.
REFERENCES:
patent: 5311583 (1994-05-01), Friedes et al.
patent: 5311585 (1994-05-01), Armstrong et al.
patent: 5724404 (1998-03-01), Gaecia et al.
patent: 5883964 (1999-03-01), Alleman
Chakravarti Arvind S.
Eng Edward D.
Lam Chi K.
Lam Yuk-Ming
Shen Henry H.
AT&T Corp.
Huynh David
Levy Robert B.
Zele Krista
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