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US 6,320,950 B1Granted
Communication control unit having a free dial and collect call function by utilizing caller ID signals
AssigneeKonica Corporation
InventorMasaki Kakutani
Life of this patent
Estimating the term…
Abstract
In a communication control unit, CPU judges whether a telephone number of a caller is included in caller ID signals and communicating section starts communicating with the caller when the CPU judges that the telephone number of the caller is not included in the caller ID signals; or calls back the telephone number of the caller when the CPU judges that the telephone number of the caller is included in the caller ID signals.
Claims15
A communication control unit, comprising:
- a network connection unit to connect public lines in response to an arrival signal sent from a caller;
- communicating means for communicating with the caller through the network connection unit;
- caller ID receiving means to receive caller ID signals of the caller sent from the public lines through the network connection unit;
- control means for judging whether a telephone number of the caller is included in the caller ID signals;
- wherein the communicating means starts communicating with the caller when the control means judges that the telephone number of the caller is not included in the caller ID signals, and calls back the telephone number of the caller when the control means judges that the telephone number of the caller is included in the caller ID signals, and
- wherein in the case that the communication control unit acts as a calling station to call a target station, when a ring tone sent from a switchboard is detected after calling the target station, arrival signals by means of a call back from the target station are waited for a prescribed period of time after lines are disconnected once, and thereafter, when the arrival signals do not come from the target station within the prescribed period of time, the control means judges that the target station does not accept a request for a call back and the communicating means conducts an ordinary call to execute redialing to the target station.
3 more elements
A communication control unit, comprising:
- a network connection unit to connect public lines in response to an arrival signal sent from a caller;
- communicating means for communicating with the caller through the network connection unit;
- caller ID receiving means to receive caller ID signals of the caller sent from the public lines through the network connection unit;
- control means for judging whether a telephone number of the caller is included in the caller ID signals;
- wherein the communicating means starts communicating with the caller when the control means judges that the telephone number of the caller is not included in the caller ID signals, and calls back the telephone number of the caller when the control means judges that the telephone number of the caller is included in the caller ID signals, and
- wherein in the case that the communication control unit acts as a calling station to call a target station, when a ring tone sent from a switchboard is detected after calling the target station, arrival signals by means of a call back from the target station are waited for a prescribed period of time after lines are disconnected once, and thereafter, when the arrival signals come from the target station within the prescribed period of time, a telephone number is checked by receiving caller ID signals, and when the received telephone number agrees with a telephone number of the target station, the control means judges that the target station accepts a request for a call back, and the communicating means conducts communication through the call back.
3 more elements
Dependencies are inferred from the claim text.