WO1998006018A2 - Computer capable of modem reset in case of modem down due to external communication hazard - Google Patents

Computer capable of modem reset in case of modem down due to external communication hazard Download PDF

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Publication number
WO1998006018A2
WO1998006018A2 PCT/KR1997/000145 KR9700145W WO9806018A2 WO 1998006018 A2 WO1998006018 A2 WO 1998006018A2 KR 9700145 W KR9700145 W KR 9700145W WO 9806018 A2 WO9806018 A2 WO 9806018A2
Authority
WO
WIPO (PCT)
Prior art keywords
modem
reset
computer
external
program
Prior art date
Application number
PCT/KR1997/000145
Other languages
French (fr)
Other versions
WO1998006018A3 (en
Inventor
Ki-Wook Song
Original Assignee
Roxan Telecom. Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to KR1996/32265 priority Critical
Priority to KR19960032265 priority
Priority to KR1019960081041A priority patent/KR19980017998A/en
Priority to KR1996/81041 priority
Application filed by Roxan Telecom. Co., Ltd. filed Critical Roxan Telecom. Co., Ltd.
Publication of WO1998006018A2 publication Critical patent/WO1998006018A2/en
Publication of WO1998006018A3 publication Critical patent/WO1998006018A3/en

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Classifications

    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 – G06F13/00 and G06F21/00
    • G06F1/24Resetting means

Abstract

A computer capable of a modem reset in case of a modem down due to an external communication hazard. The computer has a modem which includes a modem reset section for generating a modem reset signal in response to an input of a reset switch, a combining section for combining the modem reset signal and a system reset signal, and a modem chip for checking whether the computer is in a standby state for waiting for an external response due to the external hazard during execution of a communication application program, and for being reset in response to the reset signal provided from the combining section if the computer is in the standby state.

Description

COMPUTER CAPABLE OF MODEM RESET IN CASE OF MODEM DOWN DUE TO EXTERNAL COMMUNICATION HAZARD

Technical Field

The present invention relates to a computer, and more particularly to a computer which is capable of a modem reset in case of a modem down due to an external communication hazard.

Background Art

Recently, multifunctional and high-speed computers have been developed with the rapid growth of the information era. The rapid progress of the computer technology gave rise to the internationalization of the computer communications, and presently, an international computer communication operating program which is called "Internet" has been widely used. The development of the computer communications has explosively increased the number of connections of the computer communication networks, causing the number of communication network troubles also to be increased.

As shown in FIG. 1, a computer generally includes a central processing unit 10, a system ROM 20, a system RAM 30, a hard disk driver 40, an external input/output device 50 such as a floppy disk driver, a printer, a key board, a display device, etc., and a modem 60, and these units are interconnected through a system bus 70. For effecting communications, a modem (Data Modem, Data/Fax Modem, Voice/Fax Modem, DSVD/Fax Modem, ISDN Modem) , which is connected to a telephone line TEL, is installed in the computer, and a corresponding communication application program is provided on the computer operating program. Accordingly, in order to connect the communication network with the computer, the operating program such as DOS, WINDOW, WIN95, etc., is executed first and then the communication application program is called to connect the communication network. It occurs frequently that the input from a mouse or a key board becomes useless due to a temporary prohibition of the computer being used or a system hazard which is caused by an external hazard on a communication line, a host computer, a network server, etc., while the computer is communicating with the outside by executing the communication application program.

To recover the system from the hazard, a hardware reset may be executed by manipulating a power switch or pushing a system reset key, or a program reset may be executed by simultaneously pushing Ctrl-key, Alt-key, Del- Key on the keyboard. The execution of these resets does not greatly affecting the DOS operating program, but affects the WINDOW or WIN95 operating program in a manner that it produces a problem that the program being executed breaks or a data file becomes lost.

Also, in case of booting the communication application program again by the execution of the reset operation, the central processing unit 10 reads the system program from the system ROM 20, and then reads out from the hard disk driver 40 and stores in the system RAM 30 the operating program according to the booting of the system program. However, in case of booting the operating program having a large amount of data such as the WINDOW, WIN 95, etc., it has a problem that it takes a lot of time from the system reset to the rebooting.

Particularly, if the communication hazard as described above is not properly solved, the user may bear unwanted communication expenses since it may be checked that a continuous use of a toll communication line is effected even when the communication is impossible due to the hazard of a connected partner in connecting a toll communication.

Disclosure of Invention

It is an object of the present invention to provide a computer capable of a modem reset in case of a modem down due to an external communication hazard, which can escape from a communication application program to a system operating program by only resetting the modem in the event that the communication application program becomes down due to the external hazard during the execution of the communication application program.

In one aspect of the present invention, there is provided a computer capable of resetting a modem in case of a modem down, the computer comprising modem reset means for generating a modem reset signal in response to an input of a reset switch, combining means for combining the modem reset signal and a system reset signal, and a modem chip for checking whether the computer is in a standby state for waiting for an external response due to an external hazard during execution of a communication application program, and for being reset in response to a combined signal provided from the combining means if the computer is in the standby state.

In another aspect of the present invention, there is provided a computer having a modem comprising modem reset means for generating a modem reset signal in response to an input of a reset switch in a standby state for waiting for an external response due to an external hazard during execution of a communication application program, and switching means, coupled between the modem chip and a telephone line, for switching off the telephone line in response to the modem reset signal.

In still another object of the present invention, there is provided a computer having a modem, comprising a key board having a key for resetting the modem in a standby state for waiting for an external response due to an external hazard during execution of a communication application program, a computer system for generating a modem reset signal in accordance with an input of the modem reset key in the key board, and a modem chip for checking whether the computer is in the standby state for waiting for an external response due to an external hazard during execution of the communication application program, and for being reset in response to the modem reset signal if the computer is in the standby state.

In still another object of the present invention, there is provided a computer having a modem, comprising a key board having a modem reset key for resetting the modem in a standby state for waiting for an external response due to an external hazard during execution of a communication application program, a computer system for generating a program reset signal in accordance with an input of the modem reset key in the key board, modem reset means for generating a modem reset signal in response to an input of a reset switch, combining means for combining the modem reset signal and the program reset signal, and a modem chip for checking whether the computer is in the standby state, and for being reset in response to a combined signal provided from the combining means if the computer is in the standby state.

Brief Description of Drawings

The above object and other advantages of the present invention will become more apparent by describing the preferred embodiments thereof with reference to the attached drawings, in which:

FIG. 1 is a block diagram illustrating the construction of a computer having a built-in modem; FIG. 2 is a block diagram illustrating the construction of a modem built in a computer according to an embodiment of the present invention;

FIGs. 3 to 5 are flow charts explaining the operation of the modem according to the embodiment of the present invention of FIG. 2;

FIG. 6 is a block diagram illustrating the construction of a modem built in a computer according to another embodiment of the present invention;

FIG. 7 is a block diagram illustrating the construction of a modem built in a computer according to still another embodiment of the present invention; and

FIG. 8 is a block diagram illustrating the construction of a modem built in a computer according to still another embodiment of the present invention.

B at Mode for Carrying out the Invention

FIG. 2 is a block diagram of a modem built in a computer according to an embodiment of the present invention. Referring to FIG. 2, the modem includes a modem reset circuit section 61 for generating a modem reset signal by hardware in case of a program down due to an external hazard during the execution of a communication application program, a combining section 62 for combining the modem reset signal and a system reset signal, and a modem chip 63 for checking whether the computer is in a program down state due to the external hazard during the execution of the communication application program, and for being reset in response to an output signal of the combining section 62 in the program down state, a bus interface section 64 for interfacing between a system bus 70 and the modem chip 63, and a line interface section 65 for interfacing between the modem chip 63 and a telephone line TEL.

The modem reset circuit section 11 comprises a resistor Rl connected between the supply voltage VCC and a first node, a resistor R2 connected between the first node and ground, and a buffer BF1 having a Schmitt triggers GIGS connected between the first node and the combining section 62. The combining section 62 comprises an OR gate for OR-gating the system reset signal and the modem reset signal.

The modem chip 63 converts parallel data transmitted to the system into serial data and transmits the serial data through the telephone line. Also, the modem chip 63 receives and converts serial data transmitted through the telephone line into parallel data, and transmits the converted parallel data to the system bus.

The bus interface section 64 is connected between the system bus 70 and the modem chip 63, and transmits data, addresses, control signals inputted from the system to the modem chip 63, and transmits parallel data outputted from the modem chip 63 to the system bus 70. The line interface section 65 is connected between the modem chip 63 and the telephone line TEL, and controls the transmission and reception of the serial data. In the embodiment, the computer can easily escape to the previous operating program when the communication hazard is generated by means of the modem reset switch for resetting only the modem chip 63 in the above described communication hazard state. The operation of the computer according to the embodiment of the present invention will be explained in detail with reference to FIGs . 3 to 5.

Referring to FIG. 3, the central processing unit executes the system program as follows. First, it is checked whether the power is on or not (step 300) , and if the power is on, the system program stored in the system RAM is read out by the central processing unit. The central processing unit performs a system booting operation for reading an operating program from the hard disk driver according to the system program (step 302) . The execution routine of the operating program is performed, following the booting operation (step 304) . During the program execution, the power-off command is checked (step 306), and the system terminates if the power -off command is inputted (step 308) .

Referring to FIG. 4, since various application programs are performed by the selection of the user during the execution of the operating program, the central processing unit checks whether or not the user selects a communication application program or not (step 400) , and calls the selected communication application program from the hard disk driver to execute the communication application program (step 402) . At step 400, if the communication application program is not selected, another application program is executed according to the selection of the user (step 404) . When the application program terminates, the system returns to the system operating program .

Referring to FIG. 5, the central processing unit executes the communication application program routine as follows. First, a communication port error is checked (step 500), and if the communication port error exists, a communication port error signal is generated (step 502) , and the modem error is confirmed (step 508) . If the error does not exist at step 500, the modem chip set in a modem board is initialized (step 504) , while a modem chip error signal is generated if the error is checked during the initialization (step 506) to perform the step 508. The communication starts if the initialization is performed without error (step 510) . During the communication, the communication state is checked (step 512) , and, if the error does not exist, the communication is continuously performed (step 514) . The program terminates and returns to the system operating program when the communication is completed (step 516) . At step 512, the state of a communication line is checked if the error exists during the communication (step 518) , and it is checked whether or not a carrier exists if the error is generated on the line (step 520) . If the carrier does not exist, a line disconnection error signal is generated (step 522) , and a communication termination is performed (step 516) . At step 518, if the line is in a normal state, a communication protocol is tested (step 524) . If the communication protocol is checked to be abnormal, the communication protocol is recovered (step 526) , and then the communication is continued by reperforming the communication start step (step 510) . At step 524, if the communication protocol is checked to be normal, the external response is waited for (step 528) , and it is checked whether or not the modem reset command is inputted during the waiting (step 530) . If the command is not inputted, the step 528 is performed, while if the command is inputted, the modem chip is reset (step 532) , and the step 520 is performed to escape from the communication application program.

As described above, in the embodiment of the present invention, in case that no response is received from the communication partner for a long time though the line hazard or the communication protocol hazard is not produced, the same state as the communication application program down is generated since a cursor of a screen or any key input is useless. In this case, the user can escape from the communication application program and execute the operating program by compulsorily resetting the modem chip through the modem reset switch.

As a result, according to the present invention, it is not required to reboot the system, and thus the damage of file or data caused by the rebooting and the time delay for the rebooting can be prevented. FIG. 6 is a block diagram illustrating the construction of a modem according to another embodiment of the present invention. In FIG. 6, the parts overlapping with the embodiment of FIG. 2 will be referred to by the same reference numerals, whose detailed explanation thereof will be omitted. In this embodiment, the modem reset signal is not applied to the modem chip 63, but is applied to a switch such as a relay RLl connected between the line interface section 65 and the telephone line. A relay driving circuit includes a transistor Ql whose base is connected to an on-hook signal output terminal of the line interface section 65 through a resistor Rl, whose emitter is connected to a supply voltage terminal Vcc, and whose collector is connected to the relay RLl, a reset switch SWl connected between the base of the transistor Ql and the supply voltage terminal Vcc, and a resistor R2 connected between the base of the transistor Ql and the supply voltage terminal Vcc. In a normal state, the transistor Ql is turned on/off in response to the on-hook signal OH to drive the relay RLl. In resetting the modem, the transistor Ql is turned off by turning on the reset switch SWl to turn off the relay RLl, so that the line connecting the modem to the telephone line becomes disconnected and the modem chip set 63 checks such a line disconnection. In this embodiment, the modem can escape from the communication state by the line disconnection, and thus the initialization of the modem chip set 63 can be omitted. Also, though there are restrictions on the reset of the modem chip set 63 having a plug-and-play function, this embodiment can be easily applied to all modems regardless of the kinds of the modems since the modem can escape from the communication hazard state by the line disconnection.

FIG. 7 is a block diagram illustrating the construction of the modem according to still another embodiment of the present invention. In this embodiment, the modem reset operation is performed not by a hardware switch but by using a program stored in the memory. Specifically, the commands of ATZ, etc., are transferred to the system by using the key which is not frequently used in the key board or a hot key to initialize the modem. The modem reset command generated from the key board 71 is transferred to the system 73 through a key board controller 72, and the system transfers the modem initialization command to the modem chip 75 and the bus interface section 74 through the bus. The modem chip makes the line disconnection in response to the modem initialization command to terminate the communication.

FIG. 8 is a block diagram illustrating the construction of the modem according to still another embodiment the present invention. In this embodiment, the modem reset command can be generated by both hardware and software. The modem initialization command generated from the key board 71 is transferred to the system 73 through the key board controller 72, and the system 73 generates a software modem reset command by making the modem initialization command pass through the bus interface section 74. A hardware modem reset command is generated by the modem reset circuit 61. The generated hardware and software modem reset commands are combined by an OR gate G4 of the combining section, and the combined modem reset signal and the bus reset signal provided from the system are combined by an OR gate G5. The output signal of the OR gate G5 is transferred to the modem chip 75. As described above, after escaping from the communication application program, the digital signal processing (DSP) modem chip, which is up- loaded/down- loaded by software, downloads a code not from an external ROM but from the system memory. In this case, the system resets the modem, and then operates as follows in accordance with each operating program.

The system using the DOS operating program escapes from the used program and then reexecutes the using program again. The system using Windows 3.1 as its operating program escapes from the used program and Windows 3.1, and then reexecutes Windows 3.1 and the used program.

The system using WIN95 as its operating program terminates WIN95 and the used program, and then reexecutes WIN95 and the used program.

As described above, according to the present invention, the system can easily escape from an incapable state in which the system waits for the external response from the communication partner not due to a communication hazard capable of checking, but due to other external communication hazards during communication using a computer, and thus can prevent the damage of the used or operating program and the data loss, by initializing or resetting the modem chip or the modem board by hardware or software apart from the system reset operation.

In the drawings and specification, there have been disclosed typical preferred embodiments of the invention and, although specific terms are employed, they are used in a generic and descriptive sense only and not for purposes of limitation, the scope of the invention being set forth in the following claims.

Claims

What is claimed is:
1. A computer capable of a modem reset in case of a modem down due to an external communication hazard, said computer having a modem comprising: modem reset means for generating a modem reset signal in response to an input of a reset switch; combining means for combining said modem reset signal and a system reset signal; and a modem chip 'for checking whether said computer is in a standby state for waiting for an external response due to said external hazard during execution of a communication application program, and for being reset in response to a combined signal provided from said combining means if said computer is in said standby state.
2. A computer capable of a modem reset in case of a modem down due to an external communication hazard, said computer having a modem comprising: modem reset means for generating a modem reset signal in response to an input of a reset switch in a standby state for waiting for an external response due to said external hazard during execution of a communication application program; and switching means, coupled between a modem chip and a telephone line, for switching off the telephone line in response to said modem reset signal.
3. A computer capable of a modem reset in case of a modem down due to an external communication hazard, said computer having a modem comprising: a key board having a key for resetting said modem in a standby state for waiting for an external response due to said external hazard during execution of a communication application program; a computer system for generating a modem reset signal in accordance with an input of said modem reset key in said key board; and a modem chip for checking whether said computer is in said standby state for waiting for an external response due to said external hazard during execution of said communication application program, and for being reset in response to said modem reset signal if said computer is in said standby state.
4. A computer capable of a modem reset in case of a modem down due to an external communication hazard, said computer having a modem comprising: a key board having a modem reset key for resetting said modem in a standby state for waiting for an external response due to said external hazard during execution of a communication application program; a computer system for generating a program reset signal in accordance with an input of said modem reset key in said key board; modem reset means for generating a modem reset signal in response to an input of a reset switch; combining means for combining said modem reset signal and said program reset signal; and a modem chip for checking whether said computer is in said standby state, and for being reset in response to a combined signal provided from said combining means if said computer is in said standby state.
5. A computer capable of a modem reset in case of a modem down due to an external communication hazard as claimed in Claim 4, wherein a system using a DOS operating program escapes from a used program, and then reexecutes said used program in case that said modem chip is of a download type.
6. A computer capable of a modem reset in case of a modem down due to an external communication hazard as claimed in Claim 4, wherein a system using Window 3.1 as its operating program escapes from a used program and Windows 3.1, and then reexecutes said Windows 3.1 and said used program in case that said modem chip is of a download type.
7. A computer capable of a modem reset in case of a modem down due to an external communication hazard as claimed in Claim 4, wherein a system using WIN95 as its operating program terminates a used program and WIN95, and then reexecutes said WIN95 and said used program in case that said modem chip is of a download type.
PCT/KR1997/000145 1996-08-01 1997-07-30 Computer capable of modem reset in case of modem down due to external communication hazard WO1998006018A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1996/32265 1996-08-01
KR19960032265 1996-08-01
KR1019960081041A KR19980017998A (en) 1996-08-01 1996-12-31 Due to an external communication failure during modem reset the modem down the available computers
KR1996/81041 1996-12-31

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WO1998006018A2 true WO1998006018A2 (en) 1998-02-12
WO1998006018A3 WO1998006018A3 (en) 1998-03-19

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PCT/KR1997/000145 WO1998006018A2 (en) 1996-08-01 1997-07-30 Computer capable of modem reset in case of modem down due to external communication hazard

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WO1999067911A2 (en) * 1998-06-24 1999-12-29 Ricos International, Inc. Method and system for controlling a digital subscriber line
EP2109043A1 (en) * 2008-04-11 2009-10-14 SP-Holding GmbH Method and device for surveillance of a presentation system and presentation system

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EP0701195A1 (en) * 1994-09-07 1996-03-13 International Business Machines Corporation A computer system with a ring detection facility to initiate a system wakeup procedure

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999067911A2 (en) * 1998-06-24 1999-12-29 Ricos International, Inc. Method and system for controlling a digital subscriber line
WO1999067911A3 (en) * 1998-06-24 2000-07-20 Discovision Ass Method and system for controlling a digital subscriber line
EP2109043A1 (en) * 2008-04-11 2009-10-14 SP-Holding GmbH Method and device for surveillance of a presentation system and presentation system

Also Published As

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WO1998006018A3 (en) 1998-03-19

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