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Radio communication apparatus for ISDN
| Details |
Inventors: Yoshikawa, Munehiro;
Assignee: Sony Corporation (Tokyo, JP)
Primary Examiner: Kuntz; Curtis
Assistant Examiner: Oehling; G. J.
Attorney, Agent or Firm: Limbach & Limbach
A radio communication apparatus includes a main telephone connected to a digital line network and a plurality of sub telephones each being capable of performing a radio communication to the main telephone. The main telephone includes a memory for storing a subaddress and a direct dial-in number of each of the plurality of sub telephones, and an unit for, upon receiving an incoming signal transmitted from the digital line network, detecting a subaddress or a direct dial-in number included in the incoming signal, discriminating a sub telephone associated with the detected subaddress or direct dial-in number in accordance with the data stored in the memory, and transmitting the incoming signal to the discriminated sub telephone. |
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DETAILED DESCRIPTION It is an object of the present invention to provide an improved radio communication apparatus for an ISDN in which the aforementioned shortcomings and disadvantages encountered with the prior art can be eliminated.
More specifically, it is an object of the present invention to provide a radio communication apparatus for an ISDN having a plurality of remote stations such as a cordless telephone which can get services of the digital line network such as the ISDN with simple circuit configurations.
As an aspect of the present invention, a radio communication apparatus including a main telephone connected to a digital line network and a plurality of sub telephones each being capable of performing a radio communication to the main telephone, the main telephone is comprised of a memory for storing a subaddress and a direct dial-in number of each of the plurality of sub telephones, and a unit for, upon receiving an incoming signal transmitted from the digital line network, detecting a subaddress or a direct dial-in number included in the incoming signal, discriminating a sub telephone associated with the detected subaddress or direct dial-in number in accordance with the data stored in the memory, and transmitting the incoming signal to the discriminated sub telephone.
According to the radio communication apparatus for an ISDN of the present invention, when, to a digital line network such as the ISDN, there is connected a radio communication apparatus such as a cordless telephone wherein a radio communication is performed between a main telephone and sub telephones, the sub telephones can be controlled at the main telephone side in accordance with a subaddress or a DDI number included in an incoming signal.
Accordingly, the radio communication apparatus can obtain services such as the selection of a terminal receiving an incoming signal without detecting a subaddress or a DDI number of the incoming signal at each of the sub telephones, so that the constructions of each of the sub telephones can be simplified
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Ring Tones 
