JPS6249747A - Power supply control device for communication system - Google Patents

Abstract

PURPOSE:To realize exact power supply control with a simple small-sized constitution, by detecting a call signal and communication condition by using a timer. CONSTITUTION:Upon arriving a call signal, a detecting section 11 outputs a call signal detecting signal from a signal line 21. A switch controlling section 14 closes the switch of a switch section 17. As a result, the power source section of AC 100V is connected with a power supply line 6 and electric power is supplied to a system section 3 and communication controlling section 4. When the communication is completed, the signal of a signal line 13 is shifted from a high level to a low level. The switch controlling section 14 actuates a timer 15 and, upon detecting the lapse of a prescribed time, opens the switch of the switch section 17. As a result,the power source section of AC 100V is disconnected from the power supply line 6 and no power supply is made to the system section 3 and communication controlling section 4. Accordingly, the sections 3 and 4 stop operations.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a power supply control device for a communication system in which, for example, unprocessed data is sent from each branch office to a computer in a center for processing.

In the above-mentioned communication systems, it is often unclear when data will be sent from each branch office, and in order to allow data to be sent at any time, unmanned centers are being promoted.

In this case, it is conceivable to constantly supply power to the computer at the center, but in order to save energy, the power to the computer is turned on when necessary.

Such a power supply control device has been considered an intelligent device because the system must communicate and process data.

In other words, parameters related to time setting were given from the computer side, and power supply control was performed based on these parameters.

[Problems with the background technology] Therefore, it is necessary to be able to transfer data to and from a computer and to be intelligent.
The disadvantages were that it became more complex and expensive.

"Object of the Invention" The present invention was made in view of the drawbacks of the conventional power supply control device for communication systems as described above, and its purpose is to:
It is an object of the present invention to provide a power supply control device for a communication system that is small, simple, and inexpensive.

[Summary of the Invention] Therefore, the present invention includes a detection unit that detects a calling signal sent via a line and detects a state in which communication is being performed via the line, and a timer. When a call signal detection signal is given from the detection section, a signal is output to close the switch, and after the communication state detection signal is no longer given from the detection section, the timer detects the elapse of a predetermined time and opens the switch. A power supply control device for a communication system is configured by comprising a switch control unit that outputs a signal to perform the communication, and a switch unit that serves as a connection point between the power supply line and the power supply unit of the system that performs the communication and is controlled by the switch control unit. However, the above objectives have been achieved.

[Embodiment of the Invention] FIG. 3 shows a center of a communication system configured using a power supply control device 1 which is an embodiment of the present invention. The power supply control unit @1 and NCU (network control unit) 2 are AClo
It is always supplied with power from the oV's power supply unit and is in operation. Reference numeral 3 indicates a system section including a data processing terminal such as a computer, and 4 indicates a communication control section having a data interface function between the system section 3 and the line 5. The system section 4 and communication control section 4 are supplied with power from the AClooV power supply via a power line 6 under the control of the power supply control device 1 . When a calling signal (for example, a 16 Hz signal) arrives via the line 5, the NCU 2 sends a notification to that effect to the communication control unit 4 via the signal line 7. This signal is also given to the power supply control device 1. Further, it is assumed that the communication control unit 4 includes a modem, and communication is performed by transmitting and receiving carriers via the signal line 8 by this modem. The power supply control device 1 can receive this carrier via the signal line 8.

FIG. 1 shows a detailed block diagram of the power supply control device. 11
indicates the detection part. The detection unit 11 detects a signal sent from the NCU 2 indicating that a calling signal has arrived, and connects the signal line 12.
It is output as a ringing signal detection signal via the . In reality,
The signal on signal line 7 is sent to signal line 12 by the receiver driver. Further, the detection unit 11 detects the carrier on the signal line 8 and outputs it from the signal line 13 as a communication status signal. Carrier detection is performed by tone detection or level detection. Signals on signal lines 12 and 13 reach a switch control section 14 .

The switch control section 14 has a timer 15 and operates as follows.

When the calling signal detection signal on the signal line 12 arrives, a control signal is output to the switch unit 17 via the signal line 16, and the ACl
The switch of the switch unit 17 is closed so that the power supply unit of ooV and the power line 6 of the system unit 3 are connected.

Furthermore, when a state in which a communication status signal is arriving via the signal line 13 changes to a state in which it does not arrive, the timer 15 is activated to detect the passage of a predetermined time. When it is detected that the predetermined time has elapsed, the output of the control signal from the signal line 16 is stopped and the switch 17 is opened. This allows AClo
The oV power supply section and the power supply line 6 of the system section 3 are disconnected.

The above-mentioned predetermined time is the maximum time required for the system unit 3 to process data, and is set in advance.

The operation of the power supply control device 1 configured as described above will be explained using the timing chart of FIG. 2.

When a calling signal arrives via the line 5, a signal to the effect that the calling signal has arrived is outputted from the NCU 2 via the signal line 7.

The detection unit 11 outputs a calling signal detection signal from the signal line 12 based on this signal. When this signal transitions from the H level to the L level, the switch control section 14 sets the control signal on the signal line 16 to the H level and closes the switch of the switch section 7. As a result, the AClooV power supply unit and the power line 6 are connected, and power is supplied to the system unit 3 and the communication control unit 4.
, NCU 2, communicate via indirect 5 and obtain data.

During this time, since there is a carrier in the signal line 8, the detection unit 11
outputs a communication state detection signal (H level) to the signal line 13. When the above communication ends, Kisa 11? FN'l
Fukuda Rokunei (7', -n, (Kimikasako 13's Iniba eye 1)
Transitioned from novel to L level. Switch control section 14
starts the timer 15 and detects a predetermined time. While a predetermined period of time has elapsed, the system unit 3 performs processing regarding the data obtained through communication, and then ends the process. When the elapse of a predetermined time is detected,
The switch control section 14 sets the control signal on the signal line 16 to L level, and opens the switch of the switch section 7. As a result, the AC 100V power supply section and the power supply line 6 are separated.
The system unit 3 and the communication control unit 4 are cut off from power supply and stop operating.

In this embodiment, a case is considered in which a computer is included as the system section 3, but there is no particular limitation.

In addition to the present embodiment, various methods can be used for detecting a calling signal and detecting a call state depending on the interface conditions.

[Effects of the Invention] As explained above, according to the present invention, it is possible to detect a ringing signal and communication status and realize accurate power control using a timer with a simple and compact configuration, and also to reduce costs. There are benefits to be gained.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 3 is a timing chart for explaining the operation of the embodiment shown in the figure, and FIG. 3 is a block diagram of a communication system using the embodiment of the present invention. 1... Power control device 5... Line 11... Detection section 14... Switch control section 15...
Timer 17...Switch Department Agent Patent Attorney Nori Chika Ken Yudo Sanno - Figure 2 Figure 3

Claims (1)

[Claims] It has a detection section that detects a calling signal sent through a line and also detects a state in which communication is being performed via the line, and a timer, and a calling signal detection signal is given from the detection section. and output a signal to close the switch,
a switch control unit that detects the elapse of a predetermined time by the timer after the communication state detection signal is no longer provided from the detection unit and outputs a signal to open the switch; and a power line and a power supply unit of the system that performs the communication. A power supply control device for a communication system, comprising: a switch section that serves as a connection point with the switch section and is controlled by the switch control section.