JP2768790B2 - Subscriber number conversion method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] A dial digit conversion method for converting dialed numbers transmitted from an office line into dedicated line dial numbers between exchanges connected by a dedicated line, wherein a user designates an office line dial number The purpose of this is to convert the number to the dedicated line number of the other party corresponding to the number and make it possible to make outgoing calls via a dedicated line, housed in a private branch exchange connected by a dedicated line and in another private branch exchange A conversion table is provided in which the office line dial numbers of the terminal being set and the dedicated line dial numbers are associated, and when the caller inputs the office line dial numbers of the destination terminal, the conversion table is input with reference to the conversion table. A dedicated line dial number corresponding to the office line dial number is obtained, and a call is made using the dedicated line dial number.

[Industrial applications]

The present invention relates to a dial digit conversion system for converting a dial number transmitted from an office line into a dedicated line dial number between exchanges connected by a dedicated line.

[Conventional technology]

In offices such as government offices and companies, private branch exchanges (PBXs) are used to connect extension telephones to each other and to connect extension telephones to subscriber telephone lines (office lines). In addition, a plurality of private branch exchanges are connected by a dedicated line to reduce communication costs. These private branch exchanges are provided with a dial-in function that allows an incoming call to reach an extension directly from an outside line, and can be directly connected to an extension telephone by transmitting a dial-in number from outside.

[Problems to be solved by the invention]

Recently, the use of facsimile machines other than telephones has become popular, and a large number of these terminal devices are connected to the extension of a private branch exchange.

However, since a number such as a facsimile is often displayed as a general telephone number (office line number), even when transmitting from a facsimile housed in another private branch exchange connected by a dedicated line, In many cases, users transmit by using a line number, and there is a problem that communication costs cannot always be reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to convert a dialed telephone number to a corresponding dedicated telephone line number and transmit a call via a dedicated telephone line even when a user inputs a central office dial number.

[Means for solving the problem]

In the dial digit conversion method of the present invention, a private branch exchange connected by a dedicated line is provided with a conversion table in which the office line dial numbers of the terminals accommodated in other private branch exchanges are associated with the dedicated line dial numbers. When the caller inputs the line dial number of the destination terminal, a dedicated line dial number corresponding to the line dial number is obtained by referring to the conversion table, and a call is made using the line dial number.

[Action]

According to the above configuration, even if a curved dial number is input from the caller, the dial number can be converted to a dedicated line dial number and the call can be transmitted. It is possible to perform communication via the Internet, and it is possible to further reduce communication costs due to transmission of facsimile and the like.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a system configuration diagram of a PBX (private branch exchange) based on a dial number exchange system according to an embodiment of the present invention.
This exchange is constituted by a digital exchange.

In the figure, the subscriber circuit (SLT) 2 of the exchange 1A is:
This is a circuit for monitoring and controlling the line status and the call status of the extension 3. Extension 3 connected to the subscriber's circuit (SLT) 2
A plurality of terminals 4 such as a telephone and a facsimile are connected. The tone trunk 5 is a circuit that outputs various tone signals such as a ring tone of a telephone or the like.

The telephone line switch is 6, office line 7 or dedicated line 8 and extension 3
Alternatively, it is a switch for performing exchange connection between the extensions 3. The control device (CC) 9 controls connection of the communication path switch 6 and controls each circuit according to an exchange processing program and the like stored in the main memory 10.

The private line 8 connecting the private branch exchange 1A to the public telephone line 7 and the private branch exchange 1B has a central office trunk (CO) for monitoring and controlling the line state and the call state.
T) 11 and a private line trunk (PVT) 12 are connected to each other.

 The other exchange 1B has the same configuration as the exchange 1A.

FIG. 2 is a diagram illustrating an example of a network configuration of the exchange according to the embodiment.

The figure shows a state in which two exchanges 1A and 1B are connected by a dedicated line 8, and the facsimile machines 4a and 4b connected to the respective exchanges 1A and 1B have an office line number and an extension number. Are given. The exchanges 1A and 1B are given dedicated line numbers "712" and "741", respectively.
For example, when a call is made from the facsimile machine 4a to the facsimile machine 4b with the dedicated line number “712” and the extension number “2111”, the transmission is performed via the dedicated line 8.

FIG. 3 shows a conversion table 13 provided in the exchange.
FIG. 3 shows an example of the conversion table 13 in which the line numbers of the terminals (telephones, facsimiles, etc.) accommodated in other exchanges connected to the leased line 8 are associated with the leased line numbers. It is remembered.

For example, the exchange 1B in FIG. 2 stores a telephone line number and a dedicated line number of a telephone, a facsimile or the like accommodated in the exchange 1A. For example, the office line number "03-234-4567" of the facsimile 4a is stored. And a dedicated line number “741-3382” are stored in association with each other.

Next, the operation of the embodiment having the above configuration will be described with reference to the flowchart.

FIG. 4 is a flowchart of the first embodiment of the present invention.

First, it is determined whether or not the transmission request from the terminal is a line transmission (S1 in FIG. 4). At this time, if it is not a local line transmission, normal processing is executed (S2).

On the other hand, in the case of the office line transmission, the input all office line dial digits are received (S3), and the received office line dial digits are compared with the office line numbers registered in the conversion table 13 (S4).

If there is no matching number as a result of the comparison with the station line number in the conversion table 13 (S5, NO), the process proceeds to the normal processing of step S2, and a call is made using the inputted station line number.

On the other hand, the line number that matches as a result of the comparison is
(S5, YES), a dedicated line number corresponding to the input office line number is obtained from the conversion table 13 (S5).
6). Then, a trunk route connected to the destination exchange is selected from the leased line number (S7).

Further, the dedicated line number obtained from the conversion table 13 is sent to the destination exchange as the number of the destination terminal (S8). afterwards,
Proceed to step S2 to execute normal processing.

Thereby, even when an office line number is input as the number of the destination terminal between the exchanges connected by the dedicated line 8, it is possible to make a call using the dedicated line number assigned to the terminal. Low-cost dedicated line 8
Communication can be performed via. Especially in facsimile, etc., the line number is often stored in the user as the facsimile number, so even if the user enters the line number, it is possible to communicate via a low-cost dedicated line. it can.

By the way, the receiving side may provide different services for the incoming call from the office line 7 and the incoming call from the dedicated line 8. In such a case, if a call is made by the method of the first embodiment described above, the caller actually makes a call via the dedicated line 8 even though he intends to make a local line call, and the caller makes that fact. I can't know.

Therefore, in the second embodiment, when the caller makes an outgoing call, and the actual call is made through a dedicated line, the caller is notified of the fact.

FIG. 5 is a flowchart for explaining the processing operation of the second embodiment.

In the flowchart of FIG. 5, since the processing of steps S1 to S8 is the same as the processing of the first embodiment, the processing of step S9, which is a characteristic part of the second embodiment, will be described.

The station line is transmitted and the station line number of the destination terminal is converted.
13 (S5 YES in FIG. 5), a tone signal is sent to the caller to notify the caller that the call is to be made via the dedicated line 8 (S9).

From this tone signal, it is possible to know that the call is to be made on a route different from the route that the caller tried to make the call.

As described above, there is a case where it is inconvenient if the dedicated line 8 is always routed when the office line is transmitted. For example, there is a case where the destination facsimile accepts only incoming calls from the office line at night.

Therefore, in the third embodiment, when the above-described tone signal is transmitted from the exchange after performing the line transmission, the caller performs a certain operation, for example, an operation such as pressing a specific numeric key or a symbol key. By doing so, it is possible to make outgoing calls via the office line 7 as it is.

FIG. 6 is a flowchart for explaining the processing of the third embodiment.

In the flowchart of FIG. 6, the processing of steps S1 to S8 is the same as the processing of the first embodiment, and therefore the processing of steps S10 and S11, which are the characteristic parts of the third embodiment, will be described.

If the line number of the destination terminal from which the line transmission was made is present in the conversion table 13, first, a tone signal is sent to the caller, and the call is made via the dedicated line 8. Notify (FIG. 6, S9).

Then, it is determined whether or not a specific number has been input within a predetermined time after the tone signal is transmitted (S10). When a specific number is entered, the call is transmitted as it is with the line number entered by the caller (S11).

On the other hand, if a specific number has not been input after a certain period of time from the transmission of the tone signal, the process proceeds to step S6, and the dedicated line registered in the conversion table 13 corresponding to the input office line number. Make a call by converting to a number.

As described above, the caller performs a specific key operation following the tone signal, thereby preventing the exchange from being automatically routed to the leased line 8, and using the line number entered by the caller. Outgoing calls can be made. Therefore, it is possible to both reduce the communication cost by transferring the call transmitted from the office line to the dedicated line 8 and to transmit the call on the line desired by the user.

〔The invention's effect〕

According to the present invention, even when the caller inputs the office line number as the number of the destination terminal, the corresponding dedicated line number can be obtained by referring to the conversion table, and the call can be transmitted using the dedicated line number. As a result, communication can be performed by selecting a low-cost dedicated line from a public telephone line.

[Brief description of the drawings]

 FIG. 1 is a system configuration diagram of an exchange according to an embodiment of the present invention, FIG. 2 is a network configuration diagram of the embodiment, FIG. 3 is a diagram showing an example of a conversion table, and FIG. Example flowchart, FIG. 5 is a flowchart of the second embodiment, and FIG. 6 is a flowchart of the third embodiment. 1A, 1B… private branch exchange, 4… terminal, 7… office line, 8… dedicated line, 13… conversion table.

Continuation of the front page (58) Fields investigated (Int.Cl. ⁶ , DB name) H04M 3/00, 3/16-3/20 H04M 3/38-3/40 H04M 7/00-7/16 H04M 3 / 42-3/58 H04M 15/00-15/38 H04Q 3/58-3/62

Claims (2)

(57) [Claims] 1. A private branch exchange connected by a dedicated line is provided with an exchange table in which the station line numbers of the terminals accommodated in other private branch exchanges and the dedicated line numbers are associated with each other. When the office line number is input, referring to the conversion table, a dedicated line number corresponding to the input office line number is present in the conversion table, and when making a call using the dedicated line number, a sound or A subscriber number conversion method in which a caller is notified by voice. 2. When a predetermined input operation is performed by a caller in response to the notification by sound or voice, conversion from the office line number to a dedicated line number is not performed, but the input office line number is used. 2. The subscriber number conversion system according to claim 1, wherein a call is transmitted.