Telephonic communications – Reception of calling information at substation in wireline... – Blocking caller id transmission
Patent
1999-04-13
2000-12-26
Nguyen, Duc
Telephonic communications
Reception of calling information at substation in wireline...
Blocking caller id transmission
379 8821, 379 9323, H04M 156
Patent
active
061671258
ABSTRACT:
An object of the present invention is to make it possible to utilize information service provided by a carrier without designating a standard protocol as a communication network. A plurality of carriers provide information services to a communication network to which a called terminal unit is connected through a communication line. At the time of termination, a carrier control signal transmitted from the communication network includes a calling line number for identifying an originator, carrier information for identifying a carrier, and carrier service information for identifying a service to be provided. When a plurality of terminals are connected to the called terminal unit as slave units, a function of inter-calling a terminal-number provided by a carrier can be utilized. Carrier information identifying means identifies a carrier on the basis of the carrier information, and carrier-service-information-identifying means controls a terminal selecting circuit on the basis of the carrier service information.
REFERENCES:
patent: 5402469 (1995-03-01), Hopper et al.
patent: 5606602 (1997-02-01), Johnson et al.
Nakaoka Akira
Takehiro Hidemi
Nguyen Duc
Sharp Kabushiki Kaisha
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