JPH0451634A - telephone terminal equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a telephone terminal device for constructing a data communication network and providing prompt, high-quality, and highly reliable information services via telephone lines. be.

BACKGROUND OF THE INVENTION Conventionally, this type of telephone terminal device has a line control unit that controls outgoing and incoming calls, a modem unit that communicates data, and a rewritable memo that temporarily stores communication data and control information.
j - RAM section, non-volatile memo that stores control programs, etc.) - ROM section, information service display section, input section, CPU section that integrally controls the above functions, and power supply necessary for operation The system is equipped with a power supply unit that supplies power, and the operation of the line control unit connects to the necessary partner equipment etc. via the telephone line, and the operation of the modem unit performs communication of necessary data and control information. Data and control information are stored by the functions of the RAM section.

In this way, even the conventional telephone terminal device described above can provide necessary information services by being connected to a telephone line and performing data communication.

Problems to be Solved by the Invention However, in the conventional telephone terminal device described above, control information is stored in the RAM section, so when a failure occurs in the RAM section due to power outage, noise, etc., and the control information is destroyed, There was a problem that normal operation could not be continued.

The present invention is intended to solve these conventional problems.When a failure occurs due to a power outage, noise, etc., the present invention enables the continuation of correct operation by comparing and selecting control information depending on the nature of the failure. The object of the present invention is to provide an excellent telephone terminal device that can avoid the worst situations such as a system failure of the device.

Means for Solving the Problems In order to achieve the above object, the present invention stores control information of a telephone terminal device having a communication means for communicating data and setting and changing control information via a telephone line in a non-volatile memo 1. .1
- ROM section and rewritable memo +7
- The information is stored in both RAM sections.

Operation In the above configuration, the control information stored in the ROM section is copied to the RAM section, and the device is driven by the control information read from the RAM section. Therefore, even if the control information in the RAM section is damaged due to an abnormality in the power supply voltage or external noise, the control information in the ROM section will not be affected, so it is possible to quickly restore the correct control information and continue normal operation. can.

Furthermore, since it is driven by the control information in the RAM section, the function of the device can be improved by allowing the control information to be rewritten by input operations, data communication, etc. during use.

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a connection connector which is connected to a telephone line. Reference numeral 2 denotes a line control unit for making and receiving calls. 3 is a modem unit for υ data communication. 4 is a rewritable RAM section for temporarily storing communication data. 5 is a rewritable RAM unit that temporarily stores control information. 6 is a display unit that displays information input and output. Reference numeral 8 denotes an input unit for inputting and operating information. 9 is a ROM unit which is a nonvolatile memory that stores control information.

10 is a program ROM section which has basic control contents and determines CPU2O3 operation. Reference numeral 11 is the power supply unit, which supplies operating voltage etc. to each part.Power supply plug 12
Connected to the power line at 13 indicates the entire telephone terminal device. Control information for integrally controlling the functions of each of the above sections via the CPU2O3 system bus is stored in the control information ROM section 9 and the control information RAM section 5. The control information RAM section 5 is provided with control information in a positive logic configuration and a negative logic configuration. As a result, when the control information in the RAM section suffers from a fault due to an abnormality in the power supply voltage or external noise, the fault will occur in the same manner with the same logic configuration, making it difficult to detect and causing a system failure of the device. However, in the case of positive logic and negative logic configurations, the control information is not destroyed in the same way even if a fault occurs, so the occurrence of a fault can be detected by comparing the contents with each other.

Further, by providing a plurality of sets of control information in combinations of positive logic configurations and negative logic configurations, it is possible to detect failures and automatically correct the failure occurrence part.

Next, the operation of the above embodiment will be explained with reference to the flowchart of FIG. In the above embodiment, as shown in FIG. 2, the CPU 2 O 3 is controlled to operate normally if the power supply and operation are normal. A power supply voltage monitoring sensor built into the power supply section 11 determines whether the power supply is normal, and outputs CPU2O3 when an abnormality occurs. On the other hand, normal operation is checked by an operation monitoring timer built into CPU2O3, and the occurrence of an abnormality can be detected.

Under normal conditions, it operates as follows. The line control section 2 controls the outgoing or incoming call, and data transfer is started through the telephone line and modem section connected to the connection connector 1. The CPU 2O3 controls the line control section 2, modem section 3, communication data RAM section 4, control information RAM section 5, display section 6, input section 8, and control information ROM 9 according to the program stored in the program ROM10.

At the start of use, the control information stored in the 10M unit 9 is copied to the RAM unit 5 and operated. Generally speaking, it is faster to provide information in the RAM unit 5 than in the 10M unit 9 because the operating speed of the device is faster. This is because it has the effect of improving. In other words, by providing the control information in the RAM section 5, it is possible to rewrite the control information by input operation or data communication during use, which has the effect of being able to respond to improvements in the functions of the device.

Data input through the telephone line and modem section 3 is stored in the communication data RAM section 4 and displayed on the display section 6. On the other hand, the transmission data input through the input section 8 is displayed on the display section 6, and is also stored in the communication data RAM.
The information is temporarily stored in the section 4 and transmitted via the modem section 3 to the other party's terminal device through the telephone line. At this time, the control information is read from the control information RAM unit 5.

When the power supply is abnormal or the operation is abnormal, the CPU section 7 accesses the positive logic information A and the negative logic information A from the control information RAM 5 and compares the contents.

If the contents are incorrect, the contents of the control layer stored in the control information ROM 9 can be newly transferred to the control information RAM 5 to restore correct operation. At this time, by having a plurality of combinations of positive logic information A and negative logic information λ, the contents can be mutually compared and the correct control information can be determined, thereby making it possible to automatically correct the contents. This method is very effective when the control information is enhanced by data communication or usage operations.

If the control information is normal as a result of comparing the positive logic information A and the negative logic information input, the process proceeds to checking other than the control information, but the details thereof will be omitted.

As described above, according to the above-mentioned embodiment, when the power supply or operation of the telephone terminal device becomes abnormal, the control information can be confirmed and automatically corrected, thereby making it possible to prevent the system from going down or running out of control. .

Note that the communication data RAM 4 and the control information RAM 5 may be integrated or may be of a built-in type with the CPU 7. Further, the control information ROM 9 and the program ROM 10 may be integrated or may be built into the CPU section 7.

Effects of the Invention As is clear from the above embodiments, the present invention has the following effects.

(1) By having control information in the ROM section and RAM section,
At the start of initial operation and when an abnormality occurs, normal operation can be achieved by copying the control information in the ROM section to the RAM section.

(2) By holding control information in the RAM section during operation, it can be changed by data communication or input operations to improve functionality. Furthermore, the operating speed of control information can generally be improved in the RAM section rather than the ROM section.

(3) By having the control information in the RAM section as a combination of positive logic and negative logic, it is possible to ensure detection and automatic correction when an abnormality occurs, which has the effect of increasing the reliability of the device.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of a telephone terminal device according to an embodiment of the present invention, and FIG. 2 is a diagram showing a schematic operational flow of the same device. 1... Connection connector, 2... Line control section, 3...
・Modem section, 4. Communication data RAM section, 5. Control information RAM section, 6. Display section, 7. CPU section, 8.
- Input section, 9... Control information ROM section, 1o. Program ROM section, 11.. Power supply section, 12.. Power plug, 13
...Telephone terminal device.

Claims (2)

[Claims] (1) It has a means for controlling the connection to the telephone line, a modem section for exchanging communication data with the telephone line, a first RAM for storing communication data, a ROM for storing control information, and a second RAM. Telephone terminal equipment. (2) The telephone terminal device according to claim 1, wherein the control information stored in the second RAM is divided into a plurality of combinations as a positive logic configuration and a negative logic configuration.