Telephonic communications – Special services – Anonymous party
Patent
1994-12-14
1997-12-23
Bowler, Alyssa H.
Telephonic communications
Special services
Anonymous party
39520015, 379201, 379230, H01J 1300
Patent
active
057014124
ABSTRACT:
A trigger is armed to a predetermined detection point (DP) of a basic call state model controlled for each call by a switching system so that a service control point (SCP) can be unconditionally activated. The SCP stores service control information for each time band in such a manner as to correspond to each user. When a first control signal is received from the switching system, the DP which is determined by the service control information is notified to the switching system and the switching system arms the trigger to this DP. When the state of the call shifts to a specific DP to which the trigger is armed because a called party is busy or does not answer, for example, the switching system sends a second control signal to the SCP, and the SCP notifies a terminating terminal equipment determined by the service control information in response to the second control signal.
REFERENCES:
patent: 5461669 (1995-10-01), Vilain
patent: 5479495 (1995-12-01), Blumhardt
patent: 5526415 (1996-06-01), Wakamoto
CCITT Study Group XI Working Document X1/4, Mar. 1992, pp. 11-24.
Takeda Yukiko
Tanabe Shiro
Wakayama Kazuko
Bowler Alyssa H.
Harrity John
Hitachi , Ltd.
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