Abstract:
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.
Abstract:
A communication terminal device, interconnecting with a network system like the ISDN system, is configured by a CPU and a memory which stores calling identification numbers and called identification numbers with respect to communication companions who are registered in advance. Herein, one calling identification number and at least one called identification number are registered with respect to each communication companion. At a communication-sending event, a user designates a desired communication companion so that its calling identification number is automatically read out from the memory; and consequently, the communication terminal device automatically calls up the desired communication companion through the network system. At a communication-receiving event, the communication terminal device is informed of a calling party number corresponding to a calling party who accesses thereto through the network system. Then, the communication terminal device searches a called identification number, which coincides with the calling party number, within the called identification numbers registered in the memory. Thus, the calling party is identified based on the called identification number searched, so that the communication terminal device automatically performs a specific communication control which is set for the calling party identified.
Abstract:
A plurality of data terminals are connected to a plurality of ports in a data terminal control unit. A table representing correspondence in an extension number, a dial-in number and an ISDN subaddress of each data terminal equipment, the number of a port connected with each data terminal equipment, and so on is provided within the data terminal control unit. When one data terminal equipment calls another data terminal equipment, the extension number of the data terminal equipment to be called is set in a setup message. When one data terminal equipment is called from an outside line, an ISDN number thereof is set in a setup message. The setup message is then transmitted to the data terminal control unit. The data terminal control unit refers to the table, thereby to specify the data terminal equipment to be called and transmit the setup message to the corresponding data terminal equipment.