JPH05260088A - Facsimile store and forward exchange system - Google Patents

Abstract

PURPOSE:To prevent the interference of the communication of a different type in a high load state. CONSTITUTION:A means 4 which stores the upper limit number of simultaneous calls for each transmission destination is provided together with a means 2 which changes the contents of the means 4 based on an external input, a means 6 which reads out the contents of the means 4, a means 8 which compares the read-out upper limit number of simultaneous calls of each transmission destination with the upper limit number of simultaneous calls which are under transmission, and a means 10 which performs a new call via an idle circuit of a common output line for only the destination that has the number of simultaneous calls under transmission that is smaller than the upper limit number of simultaneous calls.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile store-and-forward system, and more particularly to a call initiation condition control system.

[0002]

2. Description of the Related Art Conventionally, in a facsimile exchange system,
As shown in FIG.
Table 14 in which the total number of routes of the route is stored, and bus 13 from which it is read and table 14 in which the total number of routes of the route is stored, read the number of routes of the route via bus 13,
Communication processing program 1 for processing transmission requests up to this number of lines
Have two.

The facsimile storage / exchange system 11 is connected to the exchange 18 via 16 communication lines 15-17.
The exchange 22 has 20 communication lines 19 to 21 and the exchange 1
The telephones 26 to 27 are connected to the exchange 22 by the communication line of 24 lines, and the facsimile terminals 29 to 32 are connected to the exchange 22 by the communication line of 30 lines.

The exchange 36 has 34 communication lines 33 to 3
5, the telephones 43 to 44 are connected to the exchange 4 by the communication line of 38 lines, and the facsimile terminals 45 to 46 are connected to the exchange 4 by the communication line of 41 lines.

The operation of the facsimile storage / exchange system 11 will be described below. Facsimile storage exchange system 11
When receiving the distribution request, the communication processing program 12 reads the contents of the table 14 in which the total number of routes is stored.

In the case of FIG. 2, the value of the table 14 storing the total number of routes is 16 and therefore, the communication processing program does not depend on the destination of communication until the total number of simultaneous calls reaches 16. Accepts communication requests and activates them.

The value of the number 16 is determined by the amount of traffic flowing between the exchange 18 and the facsimile storage / exchange system 11, the call loss rate, and other requirements, and is not directly related to the total number of facsimile terminals under the control of the exchange 18. Is.

Therefore, when a communication request for the number 30 is simultaneously generated in the facsimile storage and exchange system 11, the maximum number 30 of the 20 communication lines between the exchange 18 and the exchange 22 is temporarily occupied.

[0009]

In this conventional facsimile storage exchange, since the number of simultaneous communications for each route is made to correspond to each route, it differs from the number of lines accommodated in the route when the individual route is selected. It is impossible to arbitrarily set the upper limit of the number of simultaneous communications, and as a result, the occupation of the number of relay lines between the exchanges interposed between the facsimile terminal and the facsimile storage and switching system must be controlled by the facsimile storage and switching system. Therefore, there is a drawback that another type of communication is blocked when the load is high.

It is an object of the present invention to provide a facsimile storage / exchange system which prevents interference with another type of communication under a heavy load.

[0011]

In order to achieve the above object, a facsimile storage and exchange system according to the present invention has a means for storing the maximum number of simultaneous calls for each transmission destination, and the maximum number of simultaneous calls for each transmission destination. Means for changing the contents of the storage means by an external input, a means for reading the contents of the storage means for the maximum number of simultaneous calls for each transmission destination, the read maximum number of simultaneous calls for each transmission destination and the current transmission A means for comparing the number of simultaneous outgoing calls for each outgoing destination to the ground and a common open circuit of the outgoing line is used only when the comparison result shows that the number of simultaneous outgoing calls that are currently being transmitted is less than the maximum number of simultaneous outgoing calls. And a means for newly making a call.

[0012]

[Function] Defines the maximum number of connected lines for each ground, checks this maximum number of connected lines before using the common outgoing line, and calls if the current number of used lines exceeds this maximum number of connected lines. To stop.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention.

In the figure, in the facsimile storage and exchange system of the present invention, the contents of the means 4 for storing the maximum number of simultaneous calls for each transmission destination and the contents of the storage means for the maximum number of simultaneous calls for each transmission destination are input from the outside. And a means 6 for reading the contents of the storage means for the maximum number of simultaneous calls for each transmission destination.
A means 8 for comparing the read maximum number of simultaneous calls for each transmission destination with the number of simultaneous calls for each transmission source currently being transmitted; A means 10 for newly making a call is provided by using a common vacant line of the outgoing line only to the ground where the number of outgoing calls is small.

First, at the time of starting the operation of the system, an operating condition (signal 3) is given to the means 4 for storing the maximum number of simultaneous connections for each ground by means 2 for setting the maximum number of simultaneous connections for each ground from the outside.
Memorize The contents of the storage means 4 are first taken out when the facsimile storage / exchange system 1 delivers a received electronic message in response to a communication request from the facsimile terminal, and the number of communication-connected calls to the ground to be currently delivered is taken out. It is compared with the value of the upper limit number of simultaneous connections (performed using signals 5 and 7 in means 6 and means 8).

As a result of the comparison (signal 9), if the number of calls during communication connection is equal to or less than the maximum number of simultaneous connections that have been taken out, a free line of the common outgoing line is searched for and distributed using this free line. I do.

If the number of calls exceeds the limit, the distribution request is suspended, and the distribution request is placed in a waiting state until the number of calls connected to the ground is equal to or less than the maximum number of simultaneous connections. These are executed by the means 10.

Therefore, by setting the maximum number of simultaneous connections so as to be less than the number of relay lines, it is possible to prevent the condition that other traffic is obstructed by facsimile communication.

FIG. 3 is a block diagram showing a concrete example of one embodiment of the present invention. When the maximum number of simultaneous connections for each ground is input from the conversational input / output terminal 51 in the form of a command and its parameters, this information is transmitted via the signal bus 52, the conversational input / output terminal input / output control circuit 53 and the bus 54 to the facsimile. It is read by the command type program 61 in the main memory 59 connected to the central processing control unit 56 of the storage exchange system 55 by the memory bus 57, and goes through the index table 62 of the ground code and the maximum simultaneous connection number storage table 63 for each ground. Set the contents to.

After the contents are set, the facsimile terminal 74 sends the information to the facsimile storage / exchange system 55.
When a broadcast request is made to a certain ground to all the facsimile terminals belonging to the ground, the request is made by the signal bus 73, the exchange 81, the relay line group 84, and the exchange 6.
It is accepted by the call processing program 60 in the main memory 59 via the communication line group 82, the communication line group 82, and the communication control circuit 64. 6
5 to 67, 69 to 72, 73, 75, 78 and 79 are signal buses, 85 and 86 are line groups, and 76 is a facsimile. 77 and 78 are telephones.

The call processing program 60 analyzes this request, and since it is a broadcast request to all terminals on a certain ground, the received electronic message is distributed through the communication line group 82. At this time, the call processing program 60 first indexes the ground code index table 62 by the ground code and reads the contents of the maximum simultaneous connection count storage table 63 for each ground.

Next, comparing with the current number of connections to the ground,
Only when the maximum number of simultaneous connections is less than the maximum number of simultaneous connections, the call is initiated and the communication is established. By making this judgment each time you make a call,
Under any condition, it is possible to prohibit connections exceeding the maximum number of simultaneous connections, and as a result, it becomes possible to provide a vacant line for communication other than facsimile communication on the relay line.

[0023]

As described above, the present invention defines the maximum number of connected lines for each ground, checks the maximum number of connected lines before using the common outgoing line, and determines that the current number of used lines is the maximum connected line. When the number of lines exceeds the number, calls are not made. Therefore, by appropriately setting the maximum number of connected lines, the relay line is occupied by facsimile communication and other types of communication (eg voice, data, etc.) are blocked. This has the effect of preventing this.

[Brief description of drawings]

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

FIG. 2 is an operation explanatory view showing a conventional example.

FIG. 3 is a specific functional explanatory diagram of the embodiment shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Facsimile storage and exchange system 2 Setting means 4 Storage means 6 Reading means 8 Comparison means 10 Calling means

Claims (1)

[Claims] 1. A means for storing the maximum number of simultaneous calls for each transmission destination, a means for changing the contents of the storage means for the maximum number of simultaneous calls for each transmission destination by an external input, and a means for simultaneous transmission for each transmission destination. Means for reading the contents of the storage means for the upper limit number of outgoing calls, means for comparing the read upper limit number of simultaneous outgoing calls for each transmission destination with the number of simultaneous outgoing calls for each transmission destination currently being transmitted, and said comparison result Facsimile store-and-replace method characterized by having means for newly making a call by using an idle line of a common outgoing line as long as the number of simultaneous outgoing calls currently being transmitted is smaller than the maximum number of simultaneous outgoing calls ..