JPH05114955A - Communication line exchanging system and communication line exchange - Google Patents

Abstract

PURPOSE:To efficiently use the communication line and to decrease the communication expenses by providing a communication line exchange at the transmitting side and the receiving side of communication equipment and forming the communication line to combine a private line and a general public line. CONSTITUTION:A communication destination discriminating means 11 reads an area number (a trunk number) from an input communication destination number and discriminates whether it is for a private line 4 or for a general public line 5. At the time of the line 4 or the local communication, a data signal including a communication destination number is delivered to a line selecting means 14 and if not so, delivered to a retrieving means 13. For the means 13, a registering means 12 investigates whether or not the delivered area code is registered, and when the code is delivered, delivers it to the means 14 together with a data signal and when the code is not registered, delivers it to the means 14 as it is. The means 14 selects the necessary line from the line 4 and the line 5 based on the delivered data. On the other hand, an area number discriminating means 21 decodes the communication destination number from the line 4 and selects a transfer line 6. A line transfer means 22 transfers the data signal from the means 21 to the line 6 and performs the communication at the section of the communication line of a last receiving station 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication line switching system used for telephones, FAX communication, and other value-added communication, and a communication line switching system used for the system.

[0002]

2. Description of the Related Art Conventionally, communication line exchanges used for telephones, FAX communications and the like have been used for connecting dedicated lines provided for communication between specified users or general public lines. Therefore, when communicating with a communication device near the receiving side communication line exchange connected by a dedicated line, if the destination communication device is not connected to the exchange by a dedicated line, it is dedicated for communication in the section. Since I could not use the line at all, I had no choice but to use the general public line.

[0003]

Therefore, the general public line must be further laid even in the vicinity of the section where the dedicated line is laid, and the communication line fee for the section must be double paid. was there.

The present invention has been made in view of the above drawbacks, and an object of the present invention is to provide a communication line switching system capable of efficiently using a communication line and reducing communication costs.

Another object of the present invention is to provide a communication line exchange for realizing the above communication line exchange system.

[0006]

According to the communication line switching system of the present invention, a data signal transmitted from a transmitting side communication device is selected from either a dedicated line dedicated for specific users or a general public line. Input side communication line exchange for transmitting the data signal input from the selected communication line, and at least one reception side communication line exchange for guiding the data signal input from the selected communication line to the reception side communication line exchange. A communication line switching system using the dedicated line for at least one of a communication line and an output line, wherein the calling side communication line switching device decodes the communication destination number input by the calling side communication device. Correspondence between the communication line discriminating means for discriminating whether the line is for a private line or a general public line, and the private line district number closest to the destination communication device and the general public line district number are registered. District number registration means, and search means for searching from the district number registration means whether or not the dedicated line district number corresponding to the district number portion is registered when the communication destination number is a number for general public line When the communication destination number is a number for a general public line and a dedicated line area number corresponding to the number is registered or is a dedicated line number, a dedicated line is selected, and the communication destination number is The private line area number and at least a communication line selecting means for selecting a general public line when it is a general public line area number that is not registered for correspondence are provided, and the called side communication line exchange has the communication received from the input line. Decode the destination number to determine whether the district number is addressed to the communication device connected to itself, and if it is not addressed to the communication device connected to itself, select the line to transfer. When it is determined that the ward number discriminating means and the communication device connected to itself by this district number discriminating means guide the incoming data signal to the communication device through a dedicated line, the address is transmitted to the communication device connected to itself. When it is determined that it is not, it has at least a communication line transfer means for transferring the data signal received from the input line to the selected communication line.

Further, the communication line exchange of the present invention comprises the communication line discriminating means, the district number registering means, the searching means, the communication line selecting means, the district number discriminating means, and the communication line transfer. And means.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an outline of a communication circuit switching system according to an embodiment of the present invention, in which 1 is a transmitting station and 2 is a transmitting station.
Indicates a relay station, and 3 indicates a final destination station. Source station 1 and relay station 2
A private line 4 is connected between them, a first general public line 5 is connected between the originating station 1 and the final destination station 3, and a second general public line 6 is connected between the relay station 2 and the final destination station 3.

The transmitting station 1 is provided with a transmitting side communication device (not shown) and a transmitting side communication circuit switch 10,
The relay station 2 has a receiving side communication circuit switch 20, and a final receiving station 3
In the figure, destination communication devices (not shown) are respectively installed.

The originating communication line exchange 10 has a communication line discriminating means 11, a district number registering means 12, and a searching means 13.
And at least a communication line selection means 14, and
The receiving side communication circuit switch 20 has the district number discriminating means 21.
And communication line transfer means 22.

The communication line discriminating means 11 deciphers a communication destination number, for example, a telephone subscriber number, inputted by the calling side communication device and discriminates whether it is for a dedicated line or a general public line. The district number registration means 12 associates the dedicated line district number closest to the destination communication device with the general public line district number and registers them. Also,
The search means 13 determines whether or not the dedicated line area number corresponding to the area number portion is registered when the communication destination number is a number for a general public line.
It is something to search more. The communication line selection means 14 selects a dedicated line when the communication destination number is a number for a general public line and a dedicated line area number corresponding to the number is registered or is a number for a dedicated line. On the other hand, when the communication destination number is a general public line area number that is not registered with the dedicated line area number, the general public line is selected.

The district number discriminating means 21 decodes the communication destination number received from the input line to discriminate whether or not the district number is addressed to the communication device connected to itself, and is connected to itself. The communication line communication transfer means 22 selects the line to be transferred when it is not addressed to the communication device.
When the district number discriminating means 21 determines that it is addressed to the communication device connected to itself, it guides the received data signal to the communication device through a dedicated line and determines that it is not addressed to the communication device connected to itself. In this case, the data signal received from the input line is transferred to the selected communication line.

Next, the operation of the originating side communication circuit switch 10 will be specifically described according to the configuration of FIG.

For example, the communication destination discriminating means 11 reads a district number (area code) from a dialed communication destination number and first discriminates whether the communication destination number is for a dedicated line or a general public line, If the determination result is a leased line or local communication, the data signal including the communication destination number is directly passed to the communication line selection means 14, and if not, the result is passed to the search means 13.

In the area number registration means 12, the area code of the destination communication station that frequently communicates and the area number of the relay station 2 closest to the area code are registered in advance.

The search means 13 searches the registration data of the district number registration means 12 as to whether or not the area code passed from the communication destination determination means 11 is registered. If it is a registered number, it is passed to the communication line selecting means 14 together with the data signal, and if it is not registered, it is passed to the communication line selecting means 14 as it is.

The communication line selection means 14 selects a communication line required for the communication from the dedicated line 4 and the first general public line 5 based on the data signal passed from the communication destination determination means 11 or the search means 13. To do.

Next, the operation of the receiving side communication circuit switch 20 will be described.

The district number discriminating means 21 decodes the communication destination number received from the dedicated line 4 and selects the communication line (second general public line 6) to be transferred. The communication line communication transfer means 22 transfers the data signal passed from the district number determination means 21 to the selected communication line (second general public line 6). Then, communication is performed with the communication device of the final destination station 3.

Thus, in this embodiment, the final destination station 3
If there is a relay station 2 with a dedicated line 4 in the vicinity of, the dedicated line 4 is used for the communication line up to the relay station 2, and therefore a general public line 5 is separately used as in the conventional case. There is no need to do this, and it is possible to reduce the double payment section of the communication line usage fee.

In the configuration example of FIG. 1, the functions of the originating side communication line exchange 10 and the receiving side communication line exchange 20 are described separately, but if the respective exchanges 10 and 20 are provided with the functions of each other. , It is possible to send / relay in both areas.

FIG. 2 is a block diagram of a communication circuit switching system in which a plurality of relay stations 2a and 2b are installed between the source station 1 and the final destination station 3, and the source station 1 and the relay stations 2 in the vicinity thereof are shown.
A, an example is shown in which the called station 3 and the relay station 2b in the vicinity thereof are connected to each other by a general public line, and the relay stations 2a and 2b are connected to each other by a dedicated line. The receiving side communication circuit switch 20 is installed in each of the relay stations 2a and 2b.

In such a configuration, the nearest relay station 2
Only by connecting a general public line to a and 2b, communication between the originating station 1 and the called party 3 becomes possible, and the communication cost can be remarkably reduced as compared with the conventional method.

FIG. 3 is a block diagram of a communication circuit switching system according to a modification of the configuration of FIG. 2, and shows an example in which the destination communication device is directly connected to the relay station 2b.

In this case, in the receiving side communication line exchange 20 installed in the relay station 2b, it is indicated that the communication destination number received from the general public line which is the input line is addressed to the communication device connected to itself. The data signal received by the discrimination means 21 is guided to the communication device via the communication line transfer means 22 or directly.

As a result, the communication cost can be remarkably reduced as in the case of the communication circuit switching system having the configuration of FIG. 1 or 2.

[0028]

As described above, in the communication line switching system of the present invention, the communication line switching system which enables mutual connection between the existing dedicated line and the general public line is provided on the sending side and the receiving side of the communication device. Since it is provided and a communication line is formed by combining a dedicated line and a general public line, the communication line can be effectively utilized, and a conventional communication line switch that connects dedicated lines or general public lines is used. This has the effect of significantly reducing communication costs compared to the method used.
This effect becomes more remarkable when the destination communication device is installed in a remote place.

Further, since each communication circuit switch is provided with both the transmission line switching function and the relay / transfer function, it is possible to perform transmission / relay from both areas.

[Brief description of drawings]

FIG. 1 is a block diagram of a communication circuit switching system according to an embodiment of the present invention.

FIG. 2 is a block diagram of a communication circuit switching system according to another embodiment of the present invention.

FIG. 3 is a block diagram of a communication circuit switching system according to another embodiment of the present invention.

[Explanation of symbols]

 1 Calling Station 2, 2a, 2b Relay Station 3 Final Calling Station 4 Leased Line 5, 6 General Public Line 10 Calling Side Communication Line Switch 11 Communication Destination Discriminating Means 12 District Number Registering Means 13 Searching Means 14 Communication Line Selecting Means 20 Calling Side Communication line exchange 21 District number determination means 22 Communication line transfer means

Claims (3)

[Claims] 1. A transmission side communication line exchange that selects and transmits a data line transmitted from a transmission side communication device by selecting either a dedicated line for exclusive use between specific users or a general public line At least one receiving side communication line switch for guiding the data signal input from the communication line to the receiving side communication device is provided, and the dedicated line is used for at least one of an input line and an output line of the receiving side communication line switch. In the communication line switching system, the calling side communication line switching device decodes the communication destination number input by the calling side communication device to determine whether it is for a dedicated line or a general public line. Communication line identification means, area number registration means for registering by correlating the dedicated line area number closest to the destination communication device and the general public line area number, and the communication destination number is for the general public line When the number is a number, a search means for searching whether or not a dedicated line area number corresponding to the area number portion is registered by the area number registration means, and the communication destination number is a number for a general public line and the number If the dedicated line area number corresponding to is registered or is a dedicated line number, select the dedicated line and the public line area where the communication destination number is not registered in correspondence with the dedicated line area number. If it is a number, it has at least a communication line selecting means for selecting a general public line, and the receiving side communication line exchange deciphers a communication destination number received from an input line and the district number is connected to itself. It determines whether it is addressed to the communication device, and when it is not addressed to the communication device connected to itself, it selects the line number to be transferred, and the district number identification device When it is determined that it is addressed to the connected communication device, the incoming data signal is guided to the communication device through a dedicated line, and when it is determined that it is not addressed to the communication device connected to itself, the data signal received from the input line. And a communication line transfer means for transferring the selected communication line to the selected communication line. 2. The calling side communication line exchange and the receiving side communication line exchange are both the communication line discriminating means, the district number registration means, the searching means, the communication line selecting means, and the communication line selecting means. The communication line switching system according to claim 1, further comprising a district number discriminating means and the communication line transferring means. 3. A communication line for transmitting a data signal transmitted from a communication device on the transmission side is switched to either a dedicated line used between specific users or a general public line, and a call is received from an input line. A communication circuit switch that transfers this data signal to either one of a dedicated line and a general public line when the destination communication device of the data signal is not connected to the own station. Communication line discriminating means for deciphering the inputted communication destination number and discriminating whether it is for a private line or a general public line, and a private line district number and a general public line which are the closest to the destination communication device. Area number registration means for registering in correspondence with the area number, and whether the leased line area number corresponding to the area number part is registered when the communication destination number is a number for general public line Search means for searching from the district number registration means, the communication destination number is a number for general public line, and
If the leased line area number corresponding to the number is registered or is a dedicated line number, select the leased line, and the communication destination number is not registered in correspondence with the leased line area number. If it is a line area number, communication line selection means for selecting a general public line and the communication destination number received from the input line are decoded to determine whether or not the area number is addressed to the communication device connected to itself. In addition, when it is not addressed to the communication device connected to itself, the district number determining means for selecting the line to be transferred, and when the district number determining means determines that it is addressed to the communication device connected to itself, the incoming call is received. The data signal is guided to the communication device through a dedicated line, and when it is determined that it is not addressed to the communication device connected to itself, the data signal received from the input line is transferred to the selected communication line. Communication line exchange, characterized in that it comprises at least a line transfer unit.