JPH0763164B2 - Communication device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a communication device.

[Prior art]

Conventionally, for example, when a person who receives a call provides information to the person who made a call, as a method of limiting the right to receive the information, a person who has the right to receive the information stores a destination designation code and billing information. There is a method to keep the magnetic card waiting so that the communication partner designation code is not disclosed.

However, this method has a drawback in that the billing information sent from the exchange is calculated at any time, and if the billing balance runs out during a call, the line is disconnected before all the information is received.

〔Purpose〕

The present invention has been made in view of the above points, and an object of the present invention is to provide a communication device capable of preventing a person who has a right to receive information from disconnecting the line before receiving all information. provide.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is an external view of an embodiment according to the present invention, in which K is a telephone body and H is a handset, which is like a dial taken from a commercially available telephone.

FIG. 2 is a block diagram of this embodiment housed in the housing shown in the external view of FIG. 1. Reference numeral 1 is a network control circuit including generation of a connection dial with a public line, commonly known as NCU.
The L1 and L2 terminals are connected to the public line, and the D1 and D2 signals are generally connected to 2 which is the same transmitting / receiving circuit as the telephone. The signals K1, K2 and C1, C2 are control signals for controlling the NCU1 and will be described in detail later. Reference numeral 4 denotes a rewritable memory, which stores the telephone number of the destination and the remaining number of telephone calls, which is an important element of this embodiment, and how many more times the destination can be called. In the above device, the control procedure controlled by the control device CPU is determined by the software in the control device CPU. Further, the control device has registers RN and RT for temporarily storing the remaining number of calls read from the memory 4 and the destination telephone number.

Fig. 3 is an internal circuit diagram of NCU1, B is a bell that rings in response to a 16Hz ringing signal sent from the central office, and switches HS1, HS2 and HS3 are used when the handset is lifted from the telephone base unit. It is a switch that turns on. Signals K1 and K2 are signals to notify the outside whether or not the handset is up, and are connected to both ends of the fax switch HS3.

That is, when the handset is up, the signals K1 and K2 are in a short state. In addition, the fax switch HS2 connects to the line. DS is a relay switch driven by the relay coil DSL. When the control signal C1 is "H", the relay switch DS
L touches the M side. The switch DS is a switch for turning on the dial pulse while sending it to the line to eliminate the influence from the transmitting / receiving circuit.

DI is a relay switch driven by the relay coil DIL, and when the control signal C2 is "H", the relay switch DSL is in contact with the M side. This switch DI is set to "H", 'of the control signal C2.
The dial pulse train can be sent to the line by repeating L "switching.

HS1 and resistor R are for erasing the contact spark of dial impulse. The capacitor C prevents a direct current from flowing through the bell C, and also serves to eliminate the contact spark of the dial impulse. The resistance R is 150Ω and the capacitor C is 0.9μ.
It is F. The operation of this embodiment will be described below with reference to the flow chart shown in FIG. First step
At 100, the CPU 3 sets the control signals C ₁ and C ₂ to “L”. As a result, as described in the explanation of NCU1, the relay switch Di
And DS are connected to the B side, and become a non-DIAL sending state (that is, a normal state). Continue to step 110. Here, it is detected whether or not the handset is lifted. As described above, when the operator lifts the handset from the main body of the telephone, the fax switch HS2 is closed to connect the line, the fax switch HS3 is also closed, and the signals K1 and K2 are in the short state. Therefore, with the handset in place, decision step 110 always results in no, and step 1
The loop of 10 is repeated, and when the operator lifts the handset, the result of judgment step 110 becomes YES and step 120
Proceed to.

Here, the control circuit CPU3 reads the telephone number and the remaining number of calls from the memory M and stores them in the registers RT and RN.

Next, in step 130, it is determined whether or not the content of the register RN in which the remaining number of calls is stored is zero. If the value is 0, it means that the predetermined number of calls has been used up, and the end processing step 180 is skipped without performing the following line connection work. If the content of the register RN is not 0, it means that the call can still be made, the process proceeds to the next step 140, and the control signal C1 is set to "H".
To As described above, when the control signal C1 becomes "H", it is pushed to the relay switch DSM side and the dial transmission state is set. Then, in step 150, the dial pallet is sent to the telephone line according to the data in the register RN. As described above, the dial pulse is generated by the combination of "H" and "L" of the control signal C2, but in the present embodiment, the pulse train matched with the 20PPS type exchange based on the Telecommunications Business Act is emitted. That is, when transmitting 321, 4321 as an example, first, corresponding to "3", the control signal C2 is repeated "H" for 16 msec and "L" for 34 msec three times, and then "L" of 500 msec is added. . This means that the dial "3" has been transmitted.

Then, in order to send "2", the control signal C2 is set to "H" for 16 msec, and then set to "L" for 34 msec. This is repeated twice, and the control signal C2 is set to "L" for 500 msec. Similarly, by generating a dial pulse train corresponding to 1-4321, 321-2432 can be called.

When the dial pulse transmission is completed, the process proceeds to step 160 and the control signal C1 is set to "L". This completes the dial pulse transmission state and proceeds to the next step 170. Since a call is made once as described above, 1 is subtracted from the content of the register RN indicating the remaining number of calls, and the result is stored in the memory 4.

Although the operator was in a call state with the other party by proceeding to step 170 above, step 180 is a step for waiting for the call to be completed, and the operator put the handset on the telephone body. Signal again to detect
See if 1, K2 is short, that is, the Futtsu Switch HS3 is closed. If the signals K1 and K2 are in the short state, it means that the telephone call is still in progress. Therefore, step 180 is repeated. Otherwise, it means that the telephone call is completed.

This completes the control program and returns to the starting point to prepare for the next call.

According to the method described above, if the person making the call does not have the means for knowing the telephone number and the means for operating the remaining number of calls, he / she can make a call to the other party of the telephone number only a preset number of times. .

[Effect]

As described above, according to the present invention, by not disclosing the communication destination designation code, a person who does not have a storage medium and a person who does not store the communication destination designation code can communicate. Absent. Further, regardless of the communication time, the communication is controlled to be enabled or disabled according to the information of the number of times the line is connected to the other party, so that it is possible to prevent the line from being disconnected before receiving the complete information.

[Brief description of drawings]

FIG. 1 is an external view of an embodiment of a communication device according to the present invention. FIG. 2 is a block diagram of this embodiment. Fig. 3 shows NC
It is a circuit diagram of U1. FIG. 4 is a flowchart showing the operation of CUP3. N: Network control device T: Transmitting / receiving device, CPU: Control device M: Memory HS1 to HS3 ... Fax switch DSL, DIL ... Relay switch drive coil DI, DS ... Relay switch B ... Bell

Claims (1)

[Claims] 1. A storage medium for storing at least a communication destination designation code for designating a communication destination and information regarding the remaining number of times of communication, a reading means for reading information from the storage medium, and a reading means for reading by the reading means. And a change means for changing the information stored in the storage medium. When the judging means judges that the communication is possible, the communication is performed by connecting to the communication partner by the communication partner designation code and changing the information on the remaining number of communication lines by the changing means. apparatus.