JPH0294739A - Communication equipment - Google Patents

Abstract

PURPOSE:To make a call in a dialing system with a proper kind in response to the kind of a connection line by allowing a control section to switch a changeover switch to other terminal when a line detection section cannot detect the polarity inversion of a telephone circuit. CONSTITUTION:A line connection detection section 11 detects a line current to inform it to a control section 5, the control section 5 switches changeover switches 7, 8 to the position of a terminal (a) to turn on a hook switch 2, gives dial information to a PB dial generator 3, generates a PB signal corresponding to a dial signal and sends the signal to a telephone circuit 1. When the line detection section 11 cannot detect the polarity inversion of the line 1, the changeover switches 7, 8 are switched to the position of a terminal (b). Then the control section 5 sends a DP signal corresponding to dial information from a DP dial generating circuit 4 to the circuit 1. Thus, when either the circuit 3 or 4 is selected, a call circuit 6 sends a signal from a handset 10 to the circuit 1 via the PB or DP generating circuit 3 or 4 and outputs a received voice signal from the circuit 1 to the handset 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] <Industrial Application Field> The present invention relates to communication devices such as telephones and facsimile machines that connect to a destination by transmitting a dial signal on a telephone line.

(Prior Art) Conventionally, there are communication devices of this type that generate different types of dial signals, and a device that generates a dial signal corresponding to the type of exchange connected via the telephone line is connected to the telephone line. It was supposed to be connected and used. For example, if we take a telephone as an example of this type of communication device, one of the types of dial signals generated is a DP double signal PB signal.

However, recently, instead of fixedly generating either the DP double signal or the PB signal, highly versatile telephones have been developed that can generate a dial signal suitable for the type of exchange of the connected line using a manually operated changeover switch. is being developed. However, even when using this type of phone,
For example, even if the changeover switch is set to generate a PB signal as a dial signal depending on the type of exchange of the connected line, if someone switches the changeover switch to the DP double signal generation side, then There was an inconvenience that even if a dial signal was sent, the exchange would not accept it, and the call could not be connected to the other party.

(Problem to be Solved by the Invention) Conventionally, in a communication device that can select and generate either a PB signal or a DP double signal as a dial signal using a manual changeover switch, it generates a dial signal that is compatible with the exchange of the connected line. Even if the changeover switch is initially set as described above, if the setting of the changeover switch is changed for some reason, there is often a problem that the call cannot be connected to the other party after that. SUMMARY OF THE INVENTION The present invention aims to eliminate the above-mentioned drawbacks and provides a communication device that can automatically switch and generate an appropriate dial signal depending on the type of exchange of the connected line.

[Configuration of the Invention (Means for Solving the Problems)] The present invention has the following features:
In a communication device set to make a call using a dial signal of either a B signal or a DP double signal, a PB dial generating means generates a PB signal as a dial signal, and a DP double signal generates a DP double signal as a dial signal. a dial generating means, a detecting means for detecting whether the telephone line is physically connected to the device, and a determining means for determining whether the line is connected to the other party after transmitting the dial signal onto the telephone line. , the first switching means for connecting the PB dial generating means to the transmitting/receiving system, the second switching means for connecting the DP dial generating means to the transmitting/receiving system, and the detecting means to connect the telephone line to the device. When the connection is detected, the first switching means switches the PB
After inserting the dial generating means into the transmitting/receiving system, this P
If the determining means determines that the line is connected, the circuit is connected with the PB signal generating means inserted in the transmitting/receiving system. If the determining means determines that the line is not connected, the first switching means disconnects the PB signal generating means from the transmitting/receiving system, and then the second switching means disconnects the DP signal generating means from the transmitting/receiving system. A control means inserted into a transmitting/receiving system to put it in a communication standby state, and a DP signal generating means inserted into the transmitting/receiving system by the control means, and giving specific telephone number information to the DP dial generating means to automatically make a call. Furthermore, if the determination means determines that the line is not connected, the apparatus is provided with a display means for displaying an error.

(Function) In the communication device of the present invention, when the detection device detects that the telephone line is connected to the device, the control device:
After inserting the PB dial generating means into the transmitting/receiving system by the first switching means and giving specific telephone number information to the PB dial generating means to automatically make a call, the determining means determines that the line is connected. If the line is disconnected while the PB signal generating means is inserted into the transmitting/receiving system, and if the determining means determines that the line is not connected, the first switching means switches the PB signal generating means to the transmitting/receiving system. After disconnecting from the transmitting/receiving system, the OP signal generating means is inserted into the transmitting/receiving system by the second switching means to put it into a communication standby state.

Further, the display means, with the DP signal generation means inserted into the transmission/reception system by the control means, gives specific telephone number information to the DP dial generation means to automatically make a call, and then determines that the line is connected by the determination means. If it is determined that it is not possible, an error will be displayed. As a result, the communication device is automatically set to make a call using either the PB signal or the DP double signal dial mode depending on the type of telephone line.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a communication device of the present invention.

1 is a telephone line, 2 is a hook switch, 3 is a PB dial generation circuit that generates a PB signal as a dial signal, 4 is a DP dial generation circuit that generates a DP double signal as a dial signal, 5 is a PB, DP dial generation circuit 3, 4 is a control unit that inputs dial information and controls switching of changeover switches 7 and 8; 6 is a communication circuit that performs call processing and receiving processing; 7 is a control unit that inputs dial information and controls switching of changeover switches 7 and 8; A selector switch that connects to either one of the
8 is a changeover switch that connects the telephone call circuit 6 to either the PB dial generation circuit 3 or the DP dial generation circuit 4; 9 is a keypad for inputting the telephone number of the other party; and 10 is a handset for sending and receiving calls. , 11 is a line connection detection unit that detects whether or not a line is connected.

Next, the operation of this embodiment will be explained. First, when this device is connected to the telephone line 1, the line connection detection section 11 detects the line current and notifies the control section 5 of this. Upon receiving this, the control section 5 switches the changeover switch 7.8 to the terminal a side, turns on the hook switch 2, and transmits, for example, predetermined dial information such as NTT's time information service to the PB dial to the generation circuit 3. to automatically make a call. As a result, the PB dial generating circuit 3 generates a PB signal corresponding to the given dial information and sends it onto the telephone line 1. Here, if the exchange connected to telephone line 1 connects the line to the other party's time information service by the input PB signal, the polarity of the line voltage of telephone line 1 will be reversed, so this is the line connection. The detection unit 11 detects it and notifies the control unit 5 of the detection. (Therefore, since the telephone line 1 is a PB line, the control section 5 fixes the changeover switch 7.8 to the terminal a side. Therefore, from now on, when the operator inputs the telephone number from the key input section 9, this A P8 signal corresponding to the call is sent onto the telephone line 1, and the call is made. If the polarity reversal of the telephone line 1 cannot be detected by the section 11, the selector switch 7.8 is switched to the terminal side.Then, the control section 5 gives the DP dial generation circuit 4 the dial information of the specific destination. Then, the DP dial generation circuit 4 sends out the DP double signal corresponding to the dial information onto the telephone line 1. In this case, the exchange connected to the telephone line 1 calls the destination indicated by the input DP double signal. To connect the line, the line connection detection unit 11 detects the polarity reversal of the line voltage and notifies the control unit 5 of this.In response, the control unit 5 fixes the changeover switch 7.8 to the terminal side. Thereafter, when the user inputs a telephone number from the key input section 9, the DP dial generation circuit 4 sends the telephone number onto the DP double signal telephone line 1 corresponding to the telephone number, and a call is made. In this case as well, if the line connection detection unit 11 does not detect a reversal of the line voltage, the control unit 5 displays an error message indicating that the line is not connected on the display unit (not shown), etc., and ends the process. , when either the PB dial generation circuit 3 or the DP dial generation circuit 4 is selected in the above device, the telephone call circuit 6
The handset 10 via the dial generation circuit 3 or 4
A transmitted voice signal from the telephone line 1 is sent out onto the telephone line 1, and a received voice signal from the telephone line 1 is outputted to the handset 10.

FIG. 2 is an operation flowchart of the control section. When the connection of the telephone line to this device is detected via the line connection detection unit 11 in step 201, the selector switch 7.8 is switched to the terminal a side in step 202, and the PB dial generation circuit 3 is connected to the line. Then, in step 203, the PB dial generation circuit 3 issues a call to a specific destination using the PB double signal. In step 204, it is determined via the line connection detection unit 11 whether or not the line voltage has been inverted, and if so, the process is terminated. If the reversal does not occur, step 20
Proceed to step 5 and switch switch 7.8 to the terminal side.
Connect the P-dial generation circuit 4 to the line, step 206
DP to a specific destination using the DP dial generation circuit 4.
Make a call with a double signal. In step 207, it is determined via the line connection detection unit 11 whether or not a reversal of the line voltage has occurred;
If it occurs, end the process, if it does not occur, proceed to step 2.
The process goes to 0B, displays an error message on the display section, etc., and ends the process.

According to this embodiment, when the telephone line 1 is connected to the device, the control unit 5 automatically selects a dial generation circuit corresponding to the type of exchange connected to this line and inserts it into the transmission/reception system. This eliminates the inconvenience of not being able to make phone calls.

In the above embodiment, a telephone is assumed as the communication device, but the same effect can be obtained by applying the same to a facsimile device or the like. Further, in the above embodiment, the PB dial generating circuit 3 is first inserted into the transmitting/receiving system, but after inserting the DP dial generating circuit 4 into the transmitting/receiving system first, if this circuit is inappropriate, the PB dial generating circuit is inserted. A similar effect can be obtained by inserting 3.

U Effects of the Invention As described above, the communication device of the present invention has the effect of automatically setting the dial generation circuit so that a call can be made with an appropriate type of dial signal format depending on the type of connection line. .

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the communication device of the present invention, and FIG. 2 is an operation flowchart of the control section shown in FIG. 1... Telephone line 3... PB dial generation circuit 4... DP dial generation circuit 5... Control section 6... Call circuit 7.8... Changeover switch 10... Handset 11...・Line Connection Detection Department Agent Patent Attorney Nori Chika Yushu Yamashita

Claims (2)

[Claims] (1) A PB signal that generates a PB signal as a dial signal in a communication device that is set to make a call using either a PB signal or a DP signal depending on the type of line connected to the transmitting/receiving system. dial generating means; DP dial generating means for generating a DP signal as a dial signal; detecting means for detecting whether or not a telephone line is physically connected to the device; determining means for determining whether or not the PB dial generating means is connected to the other party, first switching means for connecting the PB dial generating means to the transmitting and receiving system, and second switching means for connecting the DP dial generating means to the transmitting and receiving system. and when the detecting means detects that a telephone line is connected to the device, the first switching means inserts the PB dial generating means into the transmitting/receiving system, and then inserts the PB dial generating means into the PB dial generating means. After giving specific phone number information and making an automatic call,
If the determining means determines that the line is connected, the line is disconnected with the PB signal generating means inserted in the transmitting/receiving system, and if the determining means determines that the line is not connected, the line is disconnected. After separating the PB signal generating means from the transmitting/receiving system by the first switching means,
A communication device comprising: control means for inserting a DP signal generating means into the transmitting/receiving system to put it in a communication standby state by means of the second switching means. (2) After the DP signal generation means is inserted into the transmission/reception system by the control means and the DP dial generation means is given specific telephone number information to make an automatic call, the line is not connected by the determination means. 2. The communication device according to claim 1, further comprising display means for displaying an error when it is determined that the communication device has the following error.