JPS5970073A - Power supply device for telephone set at power failure - Google Patents

Abstract

PURPOSE:To attain stable service even at the power failure by switching to a DC power supply automatically in accordance with a call signal when a call is originated from a calling telephone set under power failure. CONSTITUTION:At the power failure, a call signal from the calling telephone set is applied to a terminal 9 and detected by a level signal detector 10, a relay 12 is actuated and a contact 13 is switched to a boosting converter 14 side to hold the state of the relay 12 in a relay holding part 11. On the other hand, a power failure detecting part 15 detects the power failure simultaneously with the power failure, actuates a relay 16 and turns a contact 17, so that current of a battery supplies working voltage to a terminal 19 through a boosting converter 14. Consequently, a telephone transfer device operates normally. After completing talking, a circuit releasing signal is sent from the telephone transfer device to a control signal terminal 20, the holding part 11 is reset and the contact 13 is returned to the original state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply device for a four-electronic transfer device or an answering machine.

The power supplies of telephone forwarding devices and answering machines all operate on alternating current power. The present invention can be used for any of them, so a telephone transfer device will be described as an example. Conventionally, devices that automatically transfer calls are:
It is generally commercially available as a telephone transfer device. An example of the outline of the device is as follows.

In Figure 1, l is an office, 2 is a specific branch office, and A
is the calling telephone set, B is the receiving telephone set, C is the calling telephone set, D is the call transfer destination telephone set in the specified field office 2, and 3 is the telephone from the calling telephone set A to the receiving telephone set B. The line 4 is a telephone transfer device connected to the receiving telephone B and the calling telephone C, and 5 is the telephone line 5 from the calling telephone C to the forwarding telephone.

However, when a person from the office 1 goes to the specified branch office 2, when a call is placed on the calling telephone A or the receiving telephone B through the telephone line 3, the telephone transfer device 4 detects this and transfers the call to the calling telephone. C so that it can send a call, and calls a pre-stored forwarding destination phone in the specified branch office 2 through the telephone line 5 of the calling phone C, and calls the incoming phone B and the calling phone C. A direct call can be made between the calling telephone A and the transfer destination telephone via the telephone.

Most of the equipment used by connecting to public service lines, such as telephone transfer equipment or answering machines, uses 100 AC, which is a commercial power source, as a mobile power source, whereas the power supply for public service telephones is powered by a power source within the public telephone office. A dedicated battery installed in
DC power supply).

Therefore, if a commercial power outage occurs, these devices will become unusable. Therefore, if a power outage occurs even when a telephone transfer device or answering machine is in use, business operations may be immediately interrupted. There were many.

The present invention aims to solve these problems by providing a device that can be used without any problems even during a power outage.

In addition, this device always supplies power during power outages, detects the bell signal of the connecting line when a call is received, activates the connected equipment and connects, and gives a reset signal to the device after the operation is completed. The present invention has a function to stop the power supply by , and makes the battery last longer.(1) In a telephone transfer device or an answering machine configured to operate using AC power as a power source, A direct current power supply is connected to the device via a changeover switch, and the changeover switch described in iii is configured to automatically switch in response to a ringing signal when a call is made from a telephone set under a power outage condition. A power supply device during a power outage in the device and (2) a telephone transfer device or an answering machine are configured to operate using an AC power source, and a DC power source is connected to the device via a changeover switch, and the changeover switch is a power supply device for a telephone device during a power outage in which when a call is made from a calling telephone under a power outage condition, the power supply is automatically switched in accordance with the ringing signal, and the DC power supply is:
The gist of the invention is the configuration of a power supply device during a power outage in a telephone device that is connected to a charging device via a changeover switch when there is no power outage.

To explain with a diagram, 6 is a power supply device when a power outage occurs, 7
is a bell signal detection activation unit, 8 is a charging circuit, 9 is a terminal connected to the incoming telephone B, 10 is a bell signal detection unit, 11 is a relay holding unit, 12 is a relay, 13 is a contact, 14 is a step-up converter, 15 is a power failure detection section, 16 is a relay, 17 is a contact of the relay 16, 18 is a constant voltage power supply section, and 19 is a terminal connected to a telephone transfer device. Also, 20 is a telephone transfer device 4
This is the control signal terminal 20 of.

Next, the effect will be described.

When a power outage occurs, the call signal from the call telephone A is applied to the terminal 9, which is detected by the bell signal detection section 1O, which activates the relay 12 and switches the contact 13 to the step-up converter 14 side. The relay holding section 11 holds this. In addition, the power outage detection unit 15 detects a power outage at the same time as a power outage, activates the relay 16, and switches the contact 17, so that the power outage of the battery is increased. t
! , the current is applied to the operating voltage from the terminal 19 via the boost converter 14. The telephone transfer device 4 therefore operates as before. After the call path r, the control signal terminal 2 is sent from the telephone transfer device 4.
A line open signal is applied to 0, the relay holding section 11 is reset l-L, and the contact 13 returns to its original state.

Conventionally, equipment connected to public service lines, such as telephone forwarding equipment or answering machines, is powered by AC 100V, which is a commercial power source, in most cases, whereas the power supply for public service telephones is a dedicated power source installed within the public service telephone office. Powered by a battery (DC power supply). Therefore, if a power outage occurs in the commercial power source, these devices will become unusable. For this reason, even when a telephone transfer device or an answering machine is in use, if a power outage occurs, business operations are often interrupted on the spot.

The present invention provides a telephone transfer device or an answering machine configured to operate using an alternating current power source, in which a direct current power source is connected to the device via a changeover switch (contact 17), and the changeover switch is , a power supply device for a telephone device that automatically switches when a call is received from telephone device A under a power outage condition according to the ringing signal; Since this is a power supply in case of a power outage in a telephone device that is connected to a charging device via a When this is detected, the relay 16 is activated and the contact 17 is switched from the energized contact to the power outage contact to send the power of the interior to the bell signal detection and activation section 7 to secure the call.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a telephone transfer device, FIG. 21 is a circuit diagram of the present invention, and FIG. 3 is a block diagram of the present invention. City office 1, specified branch office 2, telephone line 3, telephone transfer device 4, telephone line 5, uninterruptible power supply 6, bell signal detection activation section 7, charging circuit 8, terminal 9, bell signal detection section IO, Relay holding part 11, relay 12, contact 13, boost converter 14, power failure detection part 15, relay 16, contact 17, constant voltage power supply part 18, terminal 19, control signal terminal 20, calling telephone A, receiving telephone B. Calling phone C1 Transfer destination phone. Patent applicant Nippon Resco Co., Ltd. Figure 1, 4f

Claims (2)

[Claims] (1) In a phone transfer device or an answering machine configured to operate using an AC power source, the device is connected to a DC power source via a changeover switch, and the changeover switch is configured to operate under a power outage condition. A power supply device for a telephone device that automatically switches over in response to a ringing signal when a call is made from a telephone set. (2) A telephone transfer device or an answering machine is configured to operate using an AC power source, and a DC power source is connected to the device via a changeover switch, and the changeover switch is configured to operate under a power outage condition. In a power supply device for a telephone device that is configured to automatically switch when a call is received from a telephone set using a ringing signal, the DC power supply is connected to a charging device via a changeover switch when there is no power outage. A power supply device for a telephone device designed to operate during a power outage.