JPH0332195A - Key telephone system - Google Patents

Abstract

PURPOSE:To reduce the capacity of a battery by presetting a telephone set whose speech function is to be kept even at a power failure and interrupting power supply to other telephone sets. CONSTITUTION:When a commercial power supply is interrupted, a power failure detection circuit 117 detects power failure and a detection output is given to a control circuit 112, which retrieves a memory 116. As to a telephone set whose talking is made available even at the power failure, 'need' is set, and as to other telephone sets, 'no need' is set and the result is stored in advance in the memory 116 for each telephone set, then the control circuit 112 turns off a switch circuit (e.g. a switch circuit 114) corresponding to a telephone set number not requiring power supply at power failure. Thus, the power feeding to the telephone set is interrupted and then the power consumption at power failure is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention, which is in the field of industrial application, is directed to a control system during a power outage in a telephone exchange device (hereinafter referred to as a button telephone device) such as a PBX.

"Prior Art" Key telephone devices have traditionally been equipped with a battery in case of a power outage, and consideration has been given to ensuring that calls will not be affected even during a power outage.

FIG. 2 is a block diagram illustrating a control method during a power outage in a conventional key telephone device.

1 is the main device, 2.3 is a telephone, and 4 is a power outage battery. The main device 1 includes a central office line interface 7.8 connected to the central office line 5.6, an extension interface 9.10 connected to the telephone 2.3, and a communication path switch 11 that connects these interfaces. ,i! IIgi circuit 1
A power supply circuit 13 is provided for supplying power to each of the above-mentioned circuits and the like. In addition,
Power is also supplied to the telephone 23 via the extension interface 9.10.

The power supply circuit 13 is normally operated by commercial power, but is connected to the power outage battery 4 so that the power outage battery 4 continues operation in the event of a power outage.

According to the above-described conventional configuration, the power consumption during energization and power outage is the same, so as the scale of the button and various devices increases, a large-capacity battery is required.

However, if a small capacity battery has to be used due to space constraints, etc., there is a problem that it cannot withstand a long power outage and important calls are interrupted.

"Problems to be Solved by the Invention" The present invention solves the problem that, in a button telephone device installed in a hospital, for example, there are extremely important calls even during a power outage.
Considering that the telephones that require such calls can be determined in advance, in the event of a power outage, the power supply to telephones other than such telephones will be cut off.
The purpose of the present invention is to provide a button telephone device that reduces power consumption during power outages and can withstand long power outages even with a small capacity battery.

In order to solve the above-mentioned problems, the present invention provides power supply from the main unit to each telephone using commercial power at all times, and during a power outage, power is supplied from the main unit to each telephone using a battery. In a button telephone device that is configured to supply power, the main device includes a power outage detection means for detecting a power outage, a switching means for controlling power supply to each telephone, and a function for determining whether or not to stop power supply in the event of a power outage for each telephone. The apparatus is configured to include a storage means that can be set in advance, and a control means that controls the switching means according to the setting result in the storage means, and the control means is activated by the detection output of the power failure detection means. It is.

"Operation" When a power outage occurs, it is detected by the power outage detection circuit of the main device, the detection output activates the control means, and the control means drives the switching means corresponding to a predetermined telephone.

As a result, the power supply to the telephone is cut off, so power consumption during a power outage is reduced. Embodiment FIG. 1 is a block diagram of a button telephone device embodying the present invention. 101 is the main device, 102 and 103 are telephone fi,
104 is a power outage battery.

As explained in FIG. 2, the main device 101 has a central office line 105.
．． Office line interface 107.10 connected to 106
8, an extension interface 109, 110, a communication path switch 111, a control circuit 112, and a power supply circuit 113, all of which have the same functions as conventional ones. The control circuit 112 is configured to include, for example, a microprocessor, and performs operations described below in addition to conventional functions.

114 and 115 are each phone number 1! ! 1102.103
This switch circuit is inserted into the connection line between the extension line interface 109 and the extension line interface 109 and 110, and is configured to be turned on and off under the control of the control circuit 112.

Reference numeral 116 denotes a memory, which stores for each telephone whether or not power supply is required during a power outage.

Reference numeral 117 denotes a power outage detection circuit, which is fitted to detect a power outage in the commercial power supply and send a detection output to the control circuit 112.

Next, the operation will be explained.

FIG. 3 is an operation flowchart of the control circuit 112.

Now, when a power outage occurs in the commercial power supply, the power outage is detected in the power outage detection circuit 117 and a detection output is given to the ili control circuit 112. (Step 1) As a result, the control circuit 112 searches the memory 116. (Step 2) Through the above search, it is determined whether power supply to the first telephone number (N number) is necessary or not. (Step 3) In other words, as mentioned above, for phones that you want to be able to make calls even during a power outage, set it as ``Required'', and for other phones as ``Not required'', store in memory in advance whether it is necessary or not for each phone. Therefore, in the case of "no", the control circuit 112 operates the switch circuit (for example, switch circuit #1114) corresponding to the corresponding telephone number and turns it off, thereby cutting off the power supply corresponding to the telephone 102 in question.

(Step 4) If "required", the switch circuit is not operated and the next telephone number is stepped up. (Swip 5) Then, it is determined whether the search has been performed for all telephone numbers (Step 6), and Steps 2 to 6 are repeated until all telephone numbers are searched. Then, for all the telephones for which "No" has been stored, Since the power supply is cut off, the power consumption of the entire device is reduced accordingly.

The power supply circuit 113 continues to operate using the battery 1.4 in the event of a power outage, as in the conventional case.

``Effects of the Inventionj'' As explained above, according to the present invention, a telephone set that must maintain the calling function even during a power outage can be set in advance,
Since the power supply to other phones is cut off, there is no practical problem and the battery capacity can be reduced.

If the capacity of the battery is kept the same as before, it will be possible to maintain the operation of the device even during a long power outage.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a button telephone device embodying the present invention, FIG. 2 is a block diagram illustrating a control method during a power outage in a conventional button telephone device, and Section 3 is an operation flowchart of the PM circuit 112. , 101...
・Main device, 2.3, 102.103...
Telephone, 4,104...Battery for power outage, 5,6,105,106...Public line,
78.107.108...... Office line interface 9.10.109, 110...... Extension interface, 11.111...... Call path Switch, 12.112... Control circuit, 13, 113... Power supply circuit, 114
．． 115...Switch circuit, 116...
・・・・・・Memory, 117・・・・・・Power outage detection route h) Fig.

Claims (1)

[Claims] In a button telephone device, power is normally supplied from the main device to each telephone by commercial power, and in the event of a power outage, power is supplied from the main device to each telephone by a battery.The main device has a power outage detection function to detect a power outage. means, a switching means for controlling power supply to each telephone, a memory means for presetting for each telephone whether or not to stop the power supply in the event of a power outage, and controlling the switching means according to the setting result in the memory means. and a control means for detecting a power outage, and the control means is activated by the detection output of the power failure detection means.