JPH04177958A - Telephone system - Google Patents

Abstract

PURPOSE:To store a telephone number even on the occurrence of power failure and to simplify the constitution by providing a programmable read only memory storing the entered telephone number even at power failure to a control section. CONSTITUTION:In the case of making abbreviation dialing, a hook switch HS is turned on to form a loop of trunk lines L1, L2. Then a dial operation section 16 reads a telephone number registered in a P-ROM(programmable read only memory) 17 in advance to attain dialing to the trunk lines L1, L2 via a dial number transmission section 14. In this case, even when the supply of 100V AC is stopped and no DC voltage is applied, the telephone number registered in the P-ROM 17 is stored and the storage of the telephone number even at power failure is not deleted. Since a backup battery whose service life is definite is not required, the constitution is simplified and a trouble of the use is avoided.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a telephone device used for home telephones and the like.

Conventional technology FIG. 2 shows a block diagram of a conventional telephone device.

1 is the central line 6. This is a communication circuit (speech network) that connects L2 via hook switch H3, and is used for receiving and
It processes the transmitted signal. 2 is a receiver constituting a telephone receiver, and 3 is a microphone. 4 is a dial number sending unit, 5 is a control unit using a microprocessor, 6 is a dial operation unit, 7 is a memory provided in the control unit 5, 8 is a backup battery, 9 is a DC from AClooV
! There is a constant voltage power supply section to obtain the voltage, and a diode D
5. Voltage is supplied to each part through D2. 9 is a constant voltage power supply, which obtains a DC voltage from AClooV.

Next, the operation of the above conventional example will be explained.

In Figure 2, the speed dial call is made using the hook switch H.
3 is turned on to form an L2 line loop. Furthermore, by reading out the telephone number registered in advance in the memory 7 in the control section 5 using the dial operation section 6, the central office line 3. You can also make calls to L2 using the phone number. Furthermore, in the event of a power outage, the telephone number registered in the memory 7 is stored and retained by the backup battery 8.

In this way, even in the above conventional example, the registered telephone number in the memory 7 is stored and held by the backup battery 8, and in this case,
Even if the supply of voltage from the constant voltage power source 9 is stopped, the telephone number registered in the memory 7 is retained.

Problems to be Solved by the Invention However, in the conventional telephone device described above, the lifespan of the backup battery 8 is limited and it may be necessary to replace it. At this time, there was a drawback that if the DC voltage from the constant voltage power supply 9 and the voltage supplied from the backup battery 8 were stopped, the telephone number stored in the memory 7 would be erased.

The present invention is intended to solve these conventional problems, and its purpose is to retain memory of telephone numbers even when the power is turned off.
Another object of the present invention is to provide an excellent telephone device whose configuration can be simplified.

Means for Solving the Problems In order to achieve the above object, the present invention has the following objectives:
The control section is equipped with a programmable read-only memory that stores and holds the telephone number input from the dial operation section.

Effects The present invention has the following effects due to the above structure. That is, the telephone number input from the dial operation section is stored in the programmable read-only memory. This allows the memorized telephone number to be retained even when power is turned off, eliminates the need for a backup battery with a limited lifespan, and simplifies the configuration.

Embodiment FIG. 1 is a block diagram showing the configuration of an embodiment of the telephone device of the present invention.

11 is a speech circuit (speech network) that connects the central office line, . 14 is a dial number sending section, and 15 is a control section using a microprocessor (MPU) or the like, which controls the operation of this telephone device. 16 is a dial operation section, 17
is a P-ROM (programmable read-only memory) that stores telephone numbers and retains the memorized telephone numbers even when power is turned on or off. 19 is a constant voltage power supply circuit, which obtains a DC voltage from AC 100V.

Next, the operation of the above conventional example will be explained.

In Figure 2, the speed dial call is made using the hook switch H.
3 is turned on to form a line loop of the central office lines, L, and L. Then, using the dial operation section 16, the P-ROM
By reading out the telephone number registered in 17, it is possible to make an outgoing call to the office lines L1 and L2 via the dial number sending unit 14.

In this case, even if the supply of AClooV is stopped and no DC voltage is applied, the telephone number registered in the P-ROM 17 will be stored and retained, and the stored telephone number will not be erased even in the event of a power outage.

Effects of the Invention As is clear from the above embodiments, the present invention provides a control unit with a programmable read-only memory that stores and retains the input telephone number even when power is not supplied.
It has the advantage that the telephone number inputted from the dial operation section can be memorized and retained even when the power is turned off.

In this case, there is no need for a backup battery with a limited lifespan, which has the advantage of simplifying the configuration and eliminating the hassle of use.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a telephone device of the present invention, and FIG. 2 is a block diagram showing the configuration of an embodiment of a conventional telephone device. 11... Call circuit, 12... Receiver, 13...
Microphone, 14...Dial number sending unit, 15.
...Control section, 16...Dial operation section, 17...P
-ROM, 19... Constant voltage power supply circuit, H3... Hook switch, Ll, L2... Office line. Agent: Patent attorney Akira Okaji and two others Figure 1P Figure 2

Claims (1)

[Scope of Claims] A telephone circuit connected to a central office line and processing transmitted and received signals, a dial operation section for inputting a predetermined telephone number, and a programmable device that stores and retains the telephone number inputted by the dial operation section.・Equipped with a read-only memory, a control unit for reading the telephone number stored in the programmable read-only memory, and a dial number sending circuit for sending the read telephone number to the central office line via the above communication circuit. A telephone device characterized by: