JPH0316397A - Key telephone system - Google Patents

Abstract

PURPOSE:To confirm the occurrence of a power failure by sending a display data preset and stored in advance corresponding to AC power supply interrupt information. CONSTITUTION:When an AC power supply is interrupted in a main system 1, the AC power supply interrupt information outputted from an AC detection means 21 is sent to control means 841-84n of key telephone sets 81-8n. Then a display data preset and stored corresponding to the AC power supply interrupt information is sent from a control means 841-84n to display control means 821-82n. Thus, a display content corresponding to the display data such as a character of 'power failure' is visually displayed. Thus, the occurrence of a power failure is recognized from the display content displayed on display means 831-83n.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a button telephone that displays the occurrence of a power outage. [Prior Art] In a conventional key telephone device, a warning sound is generated from the power supply section of the key telephone device to notify the user of a power outage state.

[Problems to be Solved by the Invention] In the above-described conventional button telephone device, the warning sound to notify of a power outage is generated from the power supply section of the button telephone device, so it is difficult for the user of the button telephone device to move away from the power supply section. There was a problem in that if there was a power outage, there was no way to know that a power outage had occurred because the warning sound could not be heard.

[A Thousand Steps to Solve the Problem] The button telephone device of the present invention has the following means. a) When the ACi source is disconnected. C) AC detection means for outputting power failure information; b) Control means for holding preset display data corresponding to AC power failure information from the AC detection means; C> Display means for visual display; d) Control means Display control means for displaying content on the display means according to the display data sent from. [Operation] When the ACt source is cut off in the main device, the AC power cutoff information output from the AC detection means is sent to the control means of the key telephone. Set in advance in response to this AC power outage information. The held display data is sent from the control means to the display control means. If the display content IM corresponds to this display data, characters such as "Teiden" will be visually displayed. Thereby, the occurrence of a power outage can be known from the display contents displayed on the display means.

[Example] Next, this invention will be explained with reference to the drawings. The figure is a block diagram showing an embodiment of the button telephone device of the present invention. In the figure, the key telephone device is placed horizontally from the main device 1 and the key telephones 8, -8. In the main equipment construction, 2 is the power supply section, and is it an AC power supply? An AC input detection unit 21 that detects whether power is being supplied from AC power supply A, an AC/DC conversion unit 22 that converts AC voltage from AC power supply A to DC voltage, and this AC/DC conversion unit 2
DC/D that converts the DC voltage output from 2 into a DC voltage suitable for each part of the main device 1 and the storage battery unit 3 and supplies it.
It consists of a C conversion section 23. Furthermore, during a power outage, the storage battery section 3 supplies DC power to each section instead of the AC power source A to cause each section to operate. 4 is the office line Ll~
L. 5 is a central office line interface that houses key telephones 8 - 8n and central office lines L1 - . 7 is a telephone interface that accommodates button telephones til8L to 8o;
Data transmitting/receiving unit 7l that transmits and receives data from l to 8■
have. Reference numeral 6 denotes a control circuit section having a control circuit 61 that controls each section of the main device 1.

In the button telephone 8, 811 is a data receiving section 33 that exchanges data with the main device 1, and 821 is a visual table for displaying predetermined display contents such as letters and numbers. Display 831
84■ is a data transmitting/receiving unit 8l.
This is a control unit that controls the display control unit 8 2 1 according to information input from the display unit 1 and holds preset display information. The display data held in advance in the control units 841 to 841 can be set arbitrarily. Below, other button telephones 82 to 8a
The same precepts as above apply. Next, the operation will be explained.

In the following operation description, in order to simplify the explanation, it is assumed that the key telephones 8t to 8a are in an unused state, but the basic operation is the same even when they are in a used state. When a power outage occurs, the AC power source A is disconnected, and the AC input detection section 21 that detects this AC power disconnection sends AC power disconnection information to the control circuit 61 of the control circuit section 6. At the same time, a control means (not shown) controls the office line interface 4, the communication path switch section 5, ? A disconnected to each part of the 4-phone interface section 7 and the button telephones 8 - 8.
DC power is supplied from the storage battery section 3 instead of the C power source A.

Note that the control means for performing the power switching operation from the AC power source to the DC power source in this manner is well known, and therefore a description thereof will be omitted.

The AC power cutoff information output from the AC input detection section 21 is
The data is sent to each button telephone set 8l-8 via the control circuit 61 and the data transmitting/receiving section 7l. Each data transmitter/receiver 8
11-81. The control units 841 to 84, which have input this AC power off information via the display control unit 82., display display data corresponding to the AC power off information. ~82n and the display controllers 821~82. control. The display controllers 82l to 82 display content according to the display data. For example, display devices 83r to 83 such as "Teiden"
. to be displayed visually.

[Effects of the Invention] As explained above, according to the key telephone device of the present invention, when the AC power is cut off in the main device, the AC power cutoff information output from the AC detection means is used to control the key telephone. sent to means.

Display data set and held in advance in response to this AC power cutoff information is sent from the control means to the display control means. Since the display contents corresponding to this display data, for example, characters such as "TEI-DEN" are visibly displayed, it is possible to know that a power outage has occurred from the display contents displayed on the display means. Therefore, even if the operator is in a position where he or she cannot hear the warning sound informing him of the power outage, he or she can know that a power outage has occurred by returning to the location of the key telephone and looking at the display contents on the display means of the key telephone. It has the effect of being able to.

[Brief explanation of the drawing]

The figure is a block diagram showing an embodiment of the button telephone device of the present invention. DESCRIPTION OF SYMBOLS 1... Main device, 21... AC input detection part (AC detection means), 8,~8,... Button telephone, 8 2 1~
821...Display control unit (display control means), 831-
831...display device (display means), 841-84.・・・
-Control unit (control means).

Claims (1)

[Claims] When the AC power supply is out of power, the DC power supply from the AC power supply to the storage battery is
In a button telephone device in which power is switched to the power source and operations are performed during a power outage, the main device is provided with an AC detection means that outputs AC power failure information when the AC power is turned off, and the main device is housed in the main device. The button telephone device includes a control means for holding preset display data corresponding to AC power cutoff information from the AC detection means, a display means for displaying a visible display, and a display means for displaying data corresponding to the display data sent from the control means. 1. A button telephone device comprising display control means for displaying contents on a display means.