JPS59218088A - Electronic key telephone set - Google Patents

Abstract

PURPOSE:To display and distinguish the operating state and failure or the like of a telephone set by inserting a normal current detecting circuit and an overcurrent detecting circuit to a current supply line to the telephone set so as to detect whether or not data transmission/reception is conducted between an output of both detecting circuits and telephone set. CONSTITUTION:The normal current detecting circuit 4 and the overcurrent detecting circuit 5 is inserted to the current supply line at a master set 1 of an electronic key telephone set. A microcomputer 7 is connected to a transformer 6 superimposing a data on the current supply line and conducts various controls for telephone exchange while transmitting and receiving the data with the telephone set 2. The microcomputer 7 receives the output of the normal current detecting circuit 4 and the overcurrent detecting circuit 5 and displays and distinguishes the operating state and failure of the telephone set 2 depending on each state by using a display element 8.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electronic button telephone device in which a current supply line for supplying current to a telephone also serves as a data line for exchanging data with the telephone.

Conventional configuration and its problems Generally, electronic button telephone devices are known in which the current supply line that supplies current to the telephone also serves as a data line that exchanges take with the telephone. In each case, a display element such as a light emitting diode is connected to a current supply circuit that supplies current to the telephone, and the display element indicates that current is being supplied to the telephone. However, with this kind of device, the display element is simply connected to the current supply circuit, so the telephone may malfunction for some reason, or the current IJ (or current supply line itself may malfunction for some reason, resulting in a short circuit). This causes the display element to turn on in the same way as when current is being supplied to the telephone, and there is a problem in that the distinction between these is completely unclear.

Purpose of the Invention The present invention eliminates the above-mentioned drawbacks of the conventional technology, and provides an excellent electronic system that can accurately distinguish and display the usage status of the telephone, malfunction of the telephone, short circuit of the current supply line, etc. with a simple configuration. The object of the present invention is to provide a button telephone device.

Structure of the Invention The present invention includes a detection circuit that detects when a normal current is flowing in a current supply circuit and a circuit that detects when an overcurrent is flowing, and which connects the output of these detection circuits and a telephone. The device is configured to accurately distinguish the use status, malfunction, etc. of the telephone and display it on a single display element by using the output of the means for detecting whether or not a take is being exchanged.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 is a block diagram of main parts of an embodiment of the electronic button telephone device of the present invention. In the figure, 1 is a main device, 2 is a telephone, and 3 is a telephone provided in the main device 1. 2 is a heater for overcurrent protection inserted into the current supply line for supplying current; 4 is a heater that outputs a predetermined signal to the output terminal when a normal value of current is flowing through the current supply line; a normal current detection circuit; 5, an overcurrent detection circuit that detects when an overcurrent exceeding the normal value flows in the current supply line and outputs a predetermined signal to the output terminal; 6, an overcurrent detection circuit for the current supply line; Superimpose data and exchange data [Lance,
A microcomputer 7 is connected to the transformer 6 and is used to transfer data to and from the telephone 2, as well as to perform various controls for telephone exchange.A microcomputer 8 is connected to the microcomputer 7 and is driven by its output. A display element such as a light emitting diode, 9 a cable serving as a telephone supply line and a cheetah line, 10 a lance provided on the telephone 2 side, 1
A microcomputer 1 is connected to the transformer IO and exchanges data with the main device 1.

In addition to performing various controls for telephone exchange, the micro computer tough also uses the output of the detection circuit 4.5 and the state of data exchange with the telephone 2 to drive the display elements 8 in different states. It is configured. Although the microcomputer 11 on the telephone 2 side is not shown yet, it detects the operation status of dial buttons and other operation buttons, and exchanges data with the main device 1 according to the status of each. It is configured to give and receive.

In the above embodiment, when the packing machine 2 is normal, the current value flowing therein is a normal value within a predetermined range, and this is detected by the normal current detection circuit 4. . If the telephone 2 is in use in this state, the microcomputer 7 itself will detect this by exchanging data with the telephone 2, and the display element 8 will be displayed as shown in FIG.
Light up continuously as shown in N. If the telephone 2 is not in use, the microcomputer 7 causes the display element 8 to blink at a fast speed as shown in FIG. 2(B) based on the current take. If the exchange of data with the telephone 2 becomes abnormal, the microcomputer 7 will detect this as well, and the microcomputer 7 will change the display element 8 to the second display element.
Blink at a slow speed as shown in figure (q).

If the telephone 2 malfunctions for some reason or the cable 9 malfunctions for some reason and the current supply line is short-circuited, the current flowing through the current supply line will far exceed the normal value within the predetermined range. In particular, a predetermined output appears from the overcurrent detection circuit 5. Therefore, due to this, the microcomputer 7 determines that the current supply line is short-circuited, and causes the display element 8 to blink intermittently as shown in FIG. 2 (1). If this happens, no output will appear from either the normal current detection circuit 4 or the overcurrent detection circuit 5, so the microcomputer 7 will detect that the telephone 2 has been disconnected or the cable 9 has been cut. Then, the display element 8 is turned off as shown in FIG.

In this way, according to the above embodiment, a normal current detection circuit and an overcurrent detection circuit are provided in the current supply line, and the outputs of these detection circuits are used to cause one display element to blink in different states. This is extremely effective for maintenance, servicing, etc., since it is possible to easily detect whether the telephone is in use or not, whether there is an abnormality in the current supply line, etc. by the blinking state of the display element.

Effects of the Invention As is clear from the above embodiment, the present invention includes a normal current detection circuit that outputs a predetermined signal when the current value flowing in the current supply line is a normal value, and a normal current detection circuit that outputs a predetermined signal when the current value flowing in the current supply line is a normal value. an overcurrent detection circuit that outputs a predetermined signal when the current value exceeds the above normal value; a means for detecting the state of the take exchanged with the telephone; and one of the detection circuits and the detection means. The display device is equipped with a means for lighting each display element in a different state, and it is possible to easily determine whether the telephone is in use, not in use, a malfunction of the telephone, a malfunction of the cable, etc. based on the blinking state of one display element. This is extremely advantageous in practice because it can be displayed easily without the need for many separate display elements.

Figure 1

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of an embodiment of the electronic key telephone device of the present invention, and FIG. 2 is an explanatory diagram of the operation of the device. ■・・Main device, 2・Telephone, 3・Heath, 4・Normal current detection circuit, 5・Overcurrent detection circuit, 6, 1O・
・Transformer, 7.1 microcomputer, 8...display element, 9 ・Cable.

Claims (1)

[Claims] a normal current detection circuit that is inserted into a current supply line to the telephone and detects whether or not a current value flowing through the current supply line is within a predetermined normal value; an overcurrent detection circuit that detects when an excessive current exceeding a normal value flows; a means for detecting the state of telephone exchange data exchanged with a telephone; By the output of the means, it is detected whether the telephone is in a normal state, whether it is in use, not in use, or in a normal state of the current supply line, and one separately provided display element is set in different states depending on these states. An electronic button telephone device comprising flashing means.