JPH03256436A - Dial number conversion system - Google Patents

Abstract

PURPOSE:To reduce communication expenses by converting a central office dial number to the private line number of an opponent in accordance with the number and performing outgoing via a private line even when a user inputs the central office dial number. CONSTITUTION:Exchanges 1A, 1B are connected mutually with the private line 8, and the central office number of a terminal housed in an other exchange connected with the private line 8 and the private line number are stored by conforming to each other in a conversion table 13. A private line dial number in accordance with the central office dial number can be found by referring to the conversion table 13, and the outgoing is performed based on the private line dial number. Therefore, the outgoing can be performed by converting the dial number to the private line dial number even when the central office dial number is inputted by a caller. In such a way, communication can be performed via the private line whose charge is less than that of a public telephone line, which reduces the communication expenses.

Description

[Detailed Description of the Invention] [Summary] Regarding a dial number conversion method that converts dialed numbers transmitted from a central office line into private line dialed numbers between exchanges connected by a private line, the user The purpose of this service is to convert the number to the corresponding dedicated line number of the other party and make calls via the dedicated line. A conversion table is provided that associates the central line dial digits of the accommodated terminals with the private line dial digits, and when the calling party inputs the central line dial digits of the destination terminal, the conversion table is referred to and input. The dedicated line dial digits corresponding to the designated central office line dial digits are determined, and the call is made using the dedicated line dial digits.

[Industrial Application Field] The present invention provides
This invention relates to a dial number conversion method for converting dial numbers transmitted from a central office line into dedicated line dial numbers.

[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 (station vA).

Additionally, dedicated lines are used to connect multiple private branch exchanges to reduce communication costs. These private branch exchanges are
It has a dial-in function that allows you to receive calls directly from an outside line to your extension, and by dialing the dial-in number from outside, you can connect directly to your extension.

[Problem to be solved by the invention]

Recently, the use of facsimile machines other than telephones has become commonplace, and many of these terminal devices are also connected to the extension lines of private branch exchanges.

However, in many cases, numbers such as fax numbers are displayed as general telephone numbers (office line numbers), so faxes sent from fax machines housed in other private branch exchanges that are connected via dedicated lines cannot be sent. Even when transmitting data, users often transmit using the central office line number, which poses a problem in that communication costs cannot necessarily be reduced.

SUMMARY OF THE INVENTION An object of the present invention is to enable, even when a user inputs a central office line dial number, that number to be converted into the dedicated line number of the corresponding party and to make a call via the dedicated line.

[Means to solve the problem]

In the dial number conversion method of the present invention, a conversion table is provided in a private branch exchange connected by a dedicated line, which associates the central office line dial numbers and private line dial numbers of terminals accommodated in other private branch exchanges. When the calling party inputs the dial digits of the destination terminal, the conversion table is referred to to determine the dedicated line dial digits corresponding to the central office line dial digits, and a call is made using the dedicated line dial digits.

[For production]

According to the above configuration, even if the caller enters the dial digits of the central office line, the dial digits can be converted to the leased line dial digits and the call can be made, so the leased line is cheaper than the public telephone line. Communication can be carried out via , further reducing communication costs associated with sending facsimiles and the like.

〔Example〕

Embodiments of the present invention will be described below 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 consists of a digital exchange.

In the figure, a subscriber circuit (SLT) 2 of the exchange IA is a circuit that monitors and controls the line status and call status of an extension 3. A plurality of terminals 4 such as telephones and facsimiles are connected to an extension 3 connected to the subscriber circuit (SLT) 2. The tone trunk 5 is a circuit that outputs various tone signals such as a ringing tone of a telephone or the like.

The communication path switch 6 is a switch that performs exchange connection between the office line 7 or the private line 8 and the extension line 3 or between the extension lines 3. A control device (CC) 9 performs connection control of the communication path switch 6 and control of each circuit according to an exchange processing program stored in the main memory 10 and the like.

In addition, the dedicated line 8 connecting the private branch exchange IA and the public telephone network central office line 7 and other private branch exchange IB is equipped with a central office line trunk (C) that monitors and controls the line status and call status.
OT) 11 and private line trunk (PVT) 12 are respectively connected.

The other exchange IB also has the same configuration as the exchange IA.

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

The figure shows two exchanges IA and IB connected by a dedicated line 8, and facsimile machines 4a and 4b connected to each exchange IA and IB have a central office line number and an extension number. Two numbers are given. Exchange IA
, IB has dedicated line numbers r712 J and r74, respectively.
For example, if the facsimile 4a makes a call using the dedicated line number r712J and the extension number r2111 of the factor ξ4b, the transmission is performed via the dedicated line 8.

In addition, FIG. 3 shows a conversion table 13 provided in the exchange.
This is a diagram showing an example, and this conversion table 13 shows correspondence between the office line numbers and dedicated line numbers of terminals (telephones, factor ξri, etc.) accommodated in other exchanges connected by the dedicated line 8. It is remembered as follows.

For example, the exchange IB in FIG. 2 stores office line numbers and leased line numbers for telephones, facsimiles, etc. accommodated in the exchange IA, such as the office line number r03-234-4567 J of the facsimile 4a. and leased line number r 7
41-33&2J are stored in association with each other.

Next, the operation of the embodiment configured as above will be explained with reference to a flowchart.

FIG. 4 is a flow chart of the first embodiment of the present invention.

First, it is determined whether the call request from the terminal is for a central office line call (Sl in FIG. 4). At this time, if the call is not made via the central line, normal processing is executed (S2).

On the other hand, if the call is made via a central office line, all the central office line dial numbers input are received (S3), and the received central office line dial numbers are compared with the central office line number registered in the conversion table 13 (S4).

As a result of comparison with the office line number in the conversion table 13, if a matching number does not exist (S5, NO), the routine proceeds to step S2, where a call is made using the input office line number.

On the other hand, as a result of the comparison, the matching office line number is found in the conversion table 13.
(S5, YES), the dedicated line number corresponding to the input office line number is obtained from the conversion table 13 (S6). Then, a trunk route connecting to the destination exchange is selected from the leased line number (S7).

Furthermore, the leased line number obtained from the conversion table 13 is sent to the destination exchange as the number of the destination terminal (S8). Thereafter, the process advances to step S2 and normal processing is executed.

As a result, between exchanges connected by dedicated line 8,
Even when a central office line number is entered as the destination terminal number,
Since calls can be made using the dedicated line number assigned to the terminal, communication can be performed via the dedicated line 8, which has lower communication charges than public telephone lines. Especially in facsimiles, the central office line number is often memorized by the user as a factor number, so even when the user enters the central office line number, communication is performed via a low-cost dedicated line. be able to.

By the way, the receiving side may provide different services for incoming calls from the central office line 7 and for incoming calls from the dedicated line 8.

In such a case, if a call is made using the method of the first embodiment described above, even if the caller intends to make a call to the central office line, the call will actually be made via the dedicated line 8, and the caller will not be aware of this. can't know.

Therefore, in the second embodiment, the caller makes a call to the central office line,
When an actual call is made through a dedicated line, the caller is notified of this fact.

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

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

A central office line call is made and the central office line number of the destination terminal is converted to conversion table 1.
3 (FIG. 5, 55YES), a tone signal is sent to the calling party to notify the calling party that the call will be made via the dedicated line 8 (S9).

This tone signal allows the caller to know that the call will be made via a route different from the route the caller intended to make the call.

As mentioned above, it may be inconvenient if the dedicated line 8 is always routed when calling from a central office line.

For example, the destination facsimile may only accept incoming calls from central office lines at night.

Therefore, in the third embodiment, when a central office line call is made and the above-mentioned tone signal is sent from the exchange, the calling party performs a certain operation, such as pressing a specific number key or symbol key. By doing so, it is possible to make a call directly via the central office line 7.

FIG. 6 is a flowchart illustrating the processing of the third embodiment.

In the flowchart of FIG. 6, steps S1 to S8
Since the processing is the same as that of the first embodiment, the processing of steps S10 to Sll, which are the characteristic portions of the third embodiment, will be explained.

If the central office line number of the destination terminal to which the central office line call was made exists in the conversion table 13, a tone signal is first sent to the caller to indicate that the call will be made via the dedicated line 8. Notify (FIG. 6, S9).

Then, it is determined whether a specific number has been input within a certain period of time after the tone signal is sent (310).

If a specific number is input, the call is made directly using the central office line number input by the caller (Sll).

On the other hand, if the specific number has not been input even after a certain period of time has passed since the tone signal was sent, the process advances to step S6, and the leased line registered in the conversion table 13 corresponding to the input office line number is Convert it to a number and make a call.

In this way, when the caller performs a specific key operation following the tone signal, the switch automatically connects the leased line 8.
This allows the caller to make a call using the central office line number entered by the caller. Therefore, it is possible to reduce the communication cost by transferring calls originating from the central office line to the dedicated line 8, and it is also possible to make calls using the line desired by the user.

〔Effect of the invention〕

According to the present invention, even if the caller inputs a central office line number as the number of the destination terminal, the corresponding leased line number can be found by referring to the conversion table and the call can be made using that leased line number. This makes it possible to select a dedicated line with a lower charge than a public telephone line for communication.

FIG. 5 is a flowchart of the second embodiment, and FIG. 6 is a flowchart of the third embodiment.

IA, IB...private branch exchange, 4...terminal, 7... Central line, 8... Dedicated line, 13... Conversion table.

Claims (1)

[Scope of Claims] 1) A conversion table (13) that associates the office line dial numbers and dedicated line dial numbers of terminals accommodated in other private branch exchanges with a private branch exchange connected by a private branch exchange (8).
), and when the caller inputs the central office line dial digits of the destination terminal, the dedicated line dial digits corresponding to the input central office line dial digits are determined by referring to the conversion table (13),
A dial number conversion method characterized in that a call is made using the dedicated line dial numbers. 2) When a leased line dial number corresponding to the office line dial number input by the caller exists in the conversion table (13) and a call is made using the leased line dial number,
2. The dial number conversion system according to claim 1, wherein the caller is notified by sound or voice. 3) When a predetermined input operation is performed by the caller in response to the above-mentioned sound or voice notification, the inputted central line dial digits are used without converting the central line dial digits to dedicated line dial digits. 3. The dial number conversion method according to claim 2, wherein a call is made.