JPH02276341A - Fault line detouring system for facsimile store and forward system - Google Patents

Abstract

PURPOSE:To eliminate the need for sending a terminal maintenance man to a field where a facsimile terminal is grounded by controlling the detouring with a command input from a facsimile store and forward exchange. CONSTITUTION:At the time of the occurrence of the fault of a normal line 3, a detouring starting signal (a) and a switching signal (b) are inputted to a detouring starting means 6 by an input means 5 in a facsimile store and forward exchange 1. A line signal transmission/reception control means 8 sends the signal (a) to a normal line transmission/reception means 9 and sets a detouring line transmission/reception means 10 to the operating state based on the signal (b). A detouring, line switching means 12 where the detouring start signal (a) is inputted sets a detouring line transmission/reception means 13 to the operating state and switches the used line from the normal line 3 to a detouring line 4. When the fault is restored, a detouring releasing signal (c) and a switching signal (d) are inputted to a detouring restarting means 7 by an operation input means 5. A detouring line switching-back means 14 sets a normal line transmission/reception means 11 to the operating state and switches back the used line from the detouring line 4 to the normal line 3.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a facsimile store and forward system for facsimile communication, and particularly to a facsimile store and forward system that switches to an alternate line and cuts back when a line failure occurs in a communication line network. Concerning a failed line detour method.

[Conventional technology]

Traditionally, when a line failure occurs in facsimile communications, the maintenance personnel for the facsimile storage and switching equipment patch the station data of the facsimile storage and switching equipment according to the line where the failure occurred, and for the facsimile terminals, maintenance personnel visit the site. , detour control was performed by changing the built-in line designation.

In addition, if the line fault is repaired, the facsimile storage and switching equipment's maintenance staff will restore the station data of the facsimile storage and switching equipment with a patch according to the line where the fault occurred, and for the facsimile terminals, the maintenance staff will visit the site. I went there and reconfigured the built-in line designation.

[Problem to be solved by the invention]

The above-described conventional failed line detour system has the following drawbacks because it is a system in which faults are controlled separately for the facsimile storage and switching equipment and the facsimile terminal.

(a) Complex operations are required for both the facsimile storage and exchange machine and the facsimile terminal.

(b) A terminal maintenance person must travel to the site to operate the facsimile terminal, which requires a long time for recovery.

(c) Even after the line has been repaired, terminal maintenance personnel must travel to the site.

The purpose of this invention is to solve the above-mentioned conventional problems.
To provide a faulty line bypass method for a facsimile storage and forwarding system capable of automatically switching to and switching back to a bypass line when a line fails.

[Means to solve the problem]

The present invention provides an operation input means for inputting a detour activation command when a normal line failure occurs and a detour cancellation command when a normal line is repaired, a detour activation means, a detour recovery means, a line signal transmission/reception control means, From a facsimile storage/switching device comprising a transmitting/receiving means and a detour line transmitting/receiving means, a normal line transmitting/receiving means of the facsimile storage/switching device, a normal line transmitting/receiving means for transmitting/receiving via the normal line, and a detour line transmitting/receiving means of the facsimile storage/switching device. A faulty line of a facsimile storage and forwarding system that performs detour control of a faulty line for a facsimile terminal, comprising a detour line transmitting/receiving means for transmitting and receiving data via the detour line, a detour line switching means, and a detour line switching means. In the detour method, the detour activation means controls the line signal transmission/reception control means and sends a detour activation signal from the operation input means to the normal line transmission/reception means of the facsimile terminal via the ordinary line transmission/reception means. The detour line switching means switches from the use of the normal line to the use of the detour line based on a detour activation signal from the normal line transmitting/receiving means,
The detour line recovery means controls the line signal transmission/reception control means and sends a detour cancellation signal from the operation input means to the detour line transmission/reception means of the facsimile terminal via the detour line transmission/reception means; The cutback means is characterized in that it switches back from using the detour line to using the normal line based on a detour cancellation signal from the detour line transmitting/receiving means.

FIG. 1 is a block diagram showing the configuration of the present invention.

The facsimile storage and exchange 1 and the facsimile terminal 2 are connected via a normal line 3 and a detour line 4.

The facsimile storage/switching device 1 includes an operation input means 5 for inputting commands for switching to the detour line 4 or the normal line 3 and for starting and canceling the detour to the facsimile terminal 2 when the normal line 3 fails; a detour activation means 6 for detour activation via the detour line 4; a detour recovery means 7 for detour recovery via the detour line 4; a line signal transmission/reception control means 8; and a normal line 3 controlled by the line signal transmission/reception control means 8. A normal line transmitting/receiving means 9 for transmitting and receiving data on the detour line 4 and a detour line transmitting/receiving means 10 for transmitting and receiving data on the detour line 4 are provided.

The facsimile terminal 2 includes a facsimile storage and exchange device 10.
a normal line transmitting/receiving means 11 for transmitting and receiving with the normal line transmitting/receiving means 9; a detour line switching means 12 for switching from a transmitting/receiving state using the normal line 3 to a transmitting/receiving state using the detour line 4 based on the detour activation command; and a facsimile storage/switching device. a detour line transmitting/receiving means 13 for transmitting and receiving data to and from the detour line transmitting/receiving means 10 of FIG. and is provided.

[Effect]

The failed line bypass method of the facsimile storage and forwarding system configured as described above operates as follows.

When a failure occurs in normal line 3, facsimile storage and switching equipment 1
When the detour starting signal a and the switching signal A are inputted to the detour starting means 6 using the operation input means 5, the detour starting means 6
sends signals a and b to line signal transmission/reception control means 8.

The line signal transmission/reception control means 8 sends the signal a to the normal line transmission/reception means 9, and also puts the detour line transmission/reception means 10 into an operating state based on the signal A. The signal a input to the normal line transmitting/receiving means 9 is transmitted to the detour line switching means 12 via the normal line 3 and the normal line transmitting/receiving means 11 of the facsimile terminal 2.
Enter. The detour line switching means 12 which receives the detour activation signal a puts the detour line transmitting/receiving means 13 into operation and switches the use from the normal line 3 to the detour line 4. Then, the facsimile terminal 2 sends a message indicating completion of the detour from the detour line transmitting/receiving means 13 to the facsimile storage/switching device 1 via the detour line 4, thereby completing the detour operation.

When the normal line 3 is restored, the operation input means 5 inputs the detour cancellation signal C and the switching signal d to the detour recovery means 7, and the detour recovery means 7 detours the signal C via the line signal transmission/reception control means 8. After sending the signal to the line transmitting/receiving means 10, the detour line transmitting/receiving means 10 is stopped based on the signal d, and the normal line transmitting/receiving means 9 is brought into operation. The signal C from the detour line transmitting/receiving means 10 is transmitted to the detour line 4 and the detour line control device'.
f9t13 to the detour line cutback means 14. The detour line cutback means 14 that has received the detour release signal C,
The normal line transmitting/receiving means 11 is brought into operation and the detour line 4 is switched back to the normal line 3. Then, the facsimile terminal 2 sends a message indicating completion of the detour cancellation from the normal line transmitting/receiving means 11 to the facsimile storage/switching device 1 via the normal line 3, thereby completing the detour cancellation work.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings from FIG. 2 onwards.

FIG. 2 is a block diagram showing a failed line detour method of a facsimile storage and forwarding system according to an embodiment of the present invention.

The facsimile storage and exchange 21 and the facsimile terminal 22 are connected to the normal line 24 via the communication line network 23.
and is connected by a detour line 25.

The facsimile storage and exchange machine 21 includes a console typewriter 26 which is an operation input means, a display device 27 which displays the results of commands input by the console typewriter 26, and a central processing unit 28 which is a detour starting means and a detour recovery means. , a main storage device 29 storing the operating program of the central processing unit 28, a communication control device 30 which is a line signal transmission and reception control means, a normal line control device 31 which is a normal line transmission and reception means, and a detour line transmission and reception means. A certain detour line control device 32 is provided.

The central processing unit 28 executes a call processing program 29a or a line control program 29b stored in the main storage device 29.
The detour activation and detour cancellation operations are performed by the line control program 29b.

The transmission process from the central processing unit 28 to the facsimile terminal 22 follows the flowchart shown in FIG.

Hereinafter, the transmission processing operation of the central processing unit 2 will be explained based on FIG.

First, the operator's input information through the console typewriter 26 is read and it is determined whether there is any error in the input format (step 31.S2).

If it is determined that there is an error in the input format, the input information is discarded and an error message is displayed on the display device 27 (
Step 33).

If it is determined that the input format is correct, it is determined whether or not a detour is currently being performed (step S4). That is, it is determined whether the detour line 25 is currently being used.

If it is determined that the input information is not currently being detoured, it is determined whether or not the input information is a detour redirection request, and if it is a detour redirection request, it is treated as an error input (Step S5.33); if it is not a detour redirection request, it is detoured. It is determined whether it is a request or not (steps S5 and S6). That is, it is determined whether the input information is a detour activation command, a switching command, or another command. If it is determined in step S6 that it is a detour request, the detour request transmission control is performed via the communication control device 30 (steps S6, 37), and if it is determined that it is not a detour request, that is, it is another command, the other command is The related processing is performed (step S6, 5ll).

Conversely, if it is determined in step S4 that the vehicle is currently being detoured, it is determined whether the input information is a detour request (step 34.S8). If it is determined that it is a detour request, it is processed as an error input (step S3). If it is determined that the input information is not a detour request, it is determined whether the input information is a command for a detour switchback request (step S8.3).
9).

That is, it is determined whether the input information is a detour cancellation command, a switching command, or another command.

If it is determined in step S9 that it is a detour switchback request, the switchback request transmission control is performed via the communication control device 30 (
In step 5lO), if it is determined that it is not a switchback request, that is, it is another command, processing related to the other command is performed (step 511).

Further, the reception processing from the facsimile terminal 22 by the central processing unit 28 follows the flowchart shown in FIG.

The reception processing operation of the central processing unit 28 will be explained below based on FIG. 4.

First, the received signal from the facsimile terminal 22 is extracted, and it is determined whether the received signal is a call processing signal or not. If it is determined that it is not a call processing signal, it is determined whether the signal is a detour request normal completion signal or not. (Step 5L-83). That is,
It is determined whether the detour request normal completion signal indicates that the facsimile terminal 22 has switched to the detour line 25 in response to the detour request from the central processing unit 2B.

If it is determined that it is a detour request normal completion signal, it is determined whether or not a detour request is currently being made to the facsimile terminal 22 (step S4); if it is determined that a detour request is not being made, an error message is sent. If it is determined that a detour is requested, the communication control device 30
．． Detour line control device 328 communication line network 23.
The message is output via the detour line 25 (step S6).

Conversely, if it is determined in step S3 that the signal is not a detour request normal completion signal, it is determined whether it is a detour request normal completion signal (steps S3, 37).

That is, it is determined whether the detour return normal completion signal indicates that the facsimile terminal 22 has switched back to the normal line 24 in response to the detour return request from the central processing unit 28 . If it is determined that the signal is not a detour return normal completion signal, other control signals are processed (step 510), and if it is determined that it is a detour return return normal completion signal, it is determined whether or not a detour return request is being made. (Step S8) If the detour return request is not in progress, it is treated as an error (Step S5). If the detour return request is in progress, a predetermined message is output to the facsimile terminal 22 (Step S9).

The communication control device 30 switches or switches back the normal line control device 31 and the detour line control device 32 according to instructions from the central processing unit 28, and also switches between these devices 3L 32.
This is a device that performs communication control.

Normal line control device 31. Each of the detour line control devices 32
A facsimile terminal 220 is connected to a normal line control device via a communication line network 23, a normal line 24 and a detour line 25. This is a device for communicating with the detour line control device 36.

On the other hand, the facsimile terminal 22 includes a central processing unit 33 that is a detour line switching means and a detour line switching means, and a main storage device 3 that stores an operating program for the central processing unit 33.
4, and a normal line control device 35 which is a normal line transmitting/receiving means.
and a detour line control device 36 which is a detour line transmitting/receiving means.

The central processing unit 33 executes a call processing program 34a and a detour line control program 34 stored in the main storage device 34.
b or detour control state storage area 34c, which performs detour activation or detour cancellation based on the detour activation signal a or detour release signal from the facsimile storage and exchange 21, and transmits the completion signal e or f to the facsimile storage and exchange It has a function to reply to 21. These processes are performed by the detour line control program 34b.

The processing of this central processing unit 33 follows the flowchart shown in FIG.

First, the received signal from the facsimile storage and switching device 32 is extracted and it is determined whether it is a call control signal or not. If it is determined that it is not a call control signal, it is determined whether or not it is currently being detoured (
Steps 81-33).

If it is determined that the detour is not currently in progress, it is determined whether the received signal indicates a detour request (step 33.
S4). If it is determined that it is not a detour request, it is determined whether or not it is a detour switchback request, and if it is a detour switchback request, the received signal is discarded as an error reception.Step SIL 312
), if it is not a detour switchback request, processing related to other signals is performed (step SIL 5IO). Conversely, when it is determined in step S4 that the received signal is a detour request, switching to the detour route is performed (step S35).
). That is, the central processing unit 33 is the normal line control unit 35.
and the detour line control device 36 to switch from the state in which the normal line 24 is used to the state in which the detour line 25 is used.

On the other hand, if it is determined in step S3 that the detour is currently being performed, it is determined whether the received signal is a detour switch-back signal,
When it is a detour switchback signal, a switchback from the detour route is performed (steps S3, 56S7). That is, the central processing unit 33 has a normal line control unit 35 and a detour line control unit 36.
The normal line 24 is controlled based on the usage status of the detour line 25.
the state of use. Conversely, if it is determined in step S6 that it is a detour request signal, it is determined whether it is a detour request signal or not, and if it is a detour request signal, the received signal is discarded as an error reception (step S9), and it is not a detour request signal. If so, perform processing related to other signals (step 51).
0).

Next, the detour control operation shown in this embodiment will be explained.

If a failure occurs in the normal line 24, a maintenance person for the facsimile storage/switching machine 21 issues a detour activation command to the central processing unit 28 using the console typewriter 26.

Since this command is correctly input and is the first detour request, the central processing unit 28 executes step S in FIG.
t, 32. Processes S4 to S7 are performed.

That is, by controlling the communication control device 30 and the normal line control device 31, the detour activation signal a is transmitted to the facsimile terminal 22 via the communication line network 23 and the normal line 24.

In the facsimile terminal 22, the detour activation signal a is received by the normal line control device 35, and the central processing unit 33 performs predetermined processing based on this signal a.

Since this detour activation signal a indicates the first detour request, the central processing unit 33 executes step 81 in FIG.
~Perform the processing in S5.

That is, the central processing unit 33 operates the detour line control device 36 to switch the use state of the normal line 24 to the use state of the detour line 25, and transmits the detour request normal completion signal e to the detour line 25.
The data is sent back to the facsimile storage and exchange 21 via the .

In the facsimile storage and exchange 21, the detour line control device 32, which is set to the operating side '+B' by the communication control device 30,
The detour request normal completion signal e is received from the facsimile terminal 22 and input to the central processing unit 28 via the communication control device 30.

Since this detour request normal completion signal e is a reply from the facsimile terminal 22 in response to the detour request, the central processing unit 28 performs the processing of steps 81 to 34° S6 in FIG. A predetermined message is sent to the terminal 22.

When the normal line 24 is restored, the maintainer of the facsimile storage and exchange 21 inputs a detour cancellation command to the central processing unit 28 using the console typewriter 26.

This command is executed while the detour line 25 is in use,
Also, since this is a detour reversion request to the facsimile terminal 22, the central processing unit 28 processes SL, S2, . S4
, 38 to perform SIO processing.

That is, by controlling the communication control device 30 and the detour line control device 32, the detour cancellation signal C is transmitted to the facsimile terminal 22 via the detour line 25.

In the facsimile terminal 22, the detour line control device 36 receives the detour cancellation signal C, and the central processing device 33 performs predetermined processing based on this signal C.

Since this detour cancellation signal C requests switching back of the detour line 25 during the detour, the central processing unit 33 executes steps S1 to S3 in FIG. S6. Perform the process of S7.

That is, the central processing unit 33 stops the detour line control device 36, switches back the use of the detour line 25 to the use of the normal line 24, and sends the detour return normal completion signal f via the normal line 24 to facsimile storage/exchange [ Reply to 21.

In the facsimile storage and exchange 21, the normal line control device 3
1 receives the detour switchback normal completion signal f and inputs it to the central control device 2B via the communication control device 30.

Since this detour return normal completion signal f is a reply from the facsimile terminal 22 in response to the detour return request, the central processing unit 28 executes steps St to S3 in FIG. 87~S
9 is performed, and a predetermined message is transmitted to the facsimile terminal 22 via the normal line 24.

〔Effect of the invention〕

Since the faulty line bypass method of the facsimile storage and forwarding system of the present invention is configured as described above, it has the following effects.

(b) Detour control can be performed by inputting commands from the facsimile storage and exchange, and there is no need to dispatch a terminal maintenance person to the site where the facsimile terminal is installed.

(b) Since there is no need to dispatch terminal maintenance personnel, there is no need to secure or arrange maintenance personnel, and the wasted travel time of maintenance personnel can be eliminated, resulting in a significant reduction in maintenance costs. can be achieved.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the present invention; FIG. 2 is a block diagram showing a failed line detour method of a facsimile storage and forwarding system according to an embodiment of the present invention; FIGS. 3 and 4 are the facsimile storage of FIG. A transmission processing flowchart and a reception processing flowchart of the central processing unit provided in the exchange, and FIG. 5 is a transmission and reception processing flowchart of the central processing unit provided in the facsimile terminal of FIG. 1.21...Facsimile storage and exchange machine 2.22...
Facsimile terminal 3.24...Normal line 4.25...Detour line 5 ・ ・ ・ 6 ・ ・ 7 ・ ・ ・ 8 ・ ・ 9.11・ 10, 13・ 12・ ・ 14・ ・ ・26・ ・ ・ 28.33・ 30・ ・ ・ 3135・ 32.36・

Claims (1)

[Claims] (1) Operation input means for inputting a detour activation command at the time of a normal line failure and inputting a detour cancellation command at the time of normal line restoration, a detour activation means, a detour recovery means, a line signal transmission/reception control means, and a normal line transmission/reception and a detour line transmitting/receiving means, a normal line transmitting/receiving means for transmitting and receiving via the normal line, and a detour line transmitting/receiving means of the facsimile storage/switching device. Faulty line bypass of a facsimile storage and forwarding system that performs detour control of a failed line for a facsimile terminal, which includes a detour line transmitting/receiving means for transmitting and receiving via a detour line, a detour line switching means, and a detour line switching means. In the system, the detour activation means controls the line signal transmission/reception control means and sends a detour activation signal from the operation input means to the normal line transmission/reception means of the facsimile terminal via the ordinary line transmission/reception means. , the detour line switching means switches from the use of the normal line to the use of the detour line based on a detour activation signal from the normal line transmitting/receiving means;
The detour line recovery means controls the line signal transmission/reception control means and sends a detour cancellation signal from the operation input means to the detour line transmission/reception means of the facsimile terminal via the detour line transmission/reception means; A failed line bypass method for a facsimile storage and forwarding system, characterized in that the cutback means switches back from using the bypass line to using the normal line based on a bypass release signal from the bypass line transmitting/receiving means.