KR20000039878A - External incoming call transferring apparatus in private branch exchange system and method thereof - Google Patents

Abstract

When any subscriber joining the PSTN network in the private exchange system enters an arbitrary telephone number to receive external incoming service, the subscriber who requested the incoming service according to the trunk line requesting the incoming service even if the same telephone number is registered in the private exchange system. The process of connecting to the corresponding subscriber located in the area close to the network.If a call connection request is detected from the PSTN through the call-only port, the process of connecting the call and sending a request for inputting the telephone number to be called by voice message. And determining whether the analyzed digit value is the extension number currently being used by analyzing the digit input to the DTMF signal according to the transmitted voice message, and if the extension number is called, calling the corresponding extension terminal to connect the call, and the extension number. If not, you can use the incoming port to Access the call number of the subscriber located closest to the subscriber who requested the call forward from the table set in the memory means according to the process of searching for the group and the group number indicating the specific region searched and the number of the analyzed digits. And connecting to a trunk line through an outgoing dedicated port according to the accessed call number, and then connecting a call to a subscriber station requesting a call transfer.

Description

External call forwarding device and method of private exchange system

The present invention relates to a private exchange system, and more particularly, any subscriber subscribed to a public switched data network (PSTN) network enters an arbitrary telephone number to receive an external incoming service. The present invention relates to an external call forwarding device and a method of a private exchange system for connecting to a corresponding subscriber located in an area close to a subscriber requesting an incoming service according to a trunk line requesting an incoming service, even if the same telephone number.

In general, telephone number franchise business that provides call forwarding service, agent service, voice mail service, etc. by connecting private exchange system to PSTN network is increasing.

This franchise business is an 080 service that uses an intelligent network. It does not service the caller's phone number, but connects the caller's phone number required by the caller by changing the call line request signal to the private exchange system according to the caller's location. to be.

For example, a business owner of a franchise business joins people in various industries as members, and the phone numbers of the registered members are tabulated to connect to arbitrary companies through 080 call-only lines from other subscribers. In this case, after connecting the corresponding company through the call-only line, the subscriber terminal requesting the call connection through the 080 call-only line and the corresponding company requested by the subscriber station are connected to the call forwarding.

However, subscribers in certain industries, such as moving centers and emergency dispatch services, are usually assigned with a phone number that is likely to be associated with the industry, and each of these easy-to-recall phone numbers exists according to the station number assigned by the telephone company. As a result, a considerable number of telephone numbers have been assigned and used locally.

Therefore, if the call forwarding service provided by the conventional private exchange system requires connection of a company, e.g., a moving center, to associate with the 080 call-only line as described above, the franchise operator operating the private exchange system is associated. Regardless of the location of the subscriber who requested the call forwarding service, the call forwarding service is provided to the subscriber who requested the call connection by selecting any one of the phone numbers in the table. There was a problem in that the service required by the subscriber could not be normally provided due to regional differences.

The present invention contemplates general problems as described above, and an object thereof is to designate that a call originating from a specific region for requesting 080 call forwarding service is inputted to a specific port of a private exchange system and indicates a specific region. And store a plurality of external telephone numbers in each extension number not used as an extension number in a private exchange system, so that any subscriber who subscribes to service provision through a PSTN network can receive an external incoming service. If you enter the phone number of the private exchange system, even if it is the same phone number registered in the private exchange system, you can quickly connect the service that you want to request by connecting the subscriber who requested the incoming service to the relevant company located near the area according to the trunk line that requested the incoming service. It is to be provided.

1 is a block diagram illustrating a configuration of an external call forwarding device of a private exchange system according to the present invention;

2 is a flowchart of an embodiment for executing a method of external call forwarding in a private exchange system according to the present invention.

Explanation of symbols for the main parts of the drawings

10: trunk line connection circuit 20: trunk line control

30: guide voice transmission / DTMF analysis circuit 40: station control unit

50: memory unit 60: extension terminal

The present invention for achieving the object as described above, in the private exchange system, and connected to the PSTN network through the call-only port and the call-only port, each of the call-only port is set so that only calls originating from a specific area is received; Trunk line connection means for designating a group for displaying a specific area for each incoming port;

Trunk line control means for notifying a lower device whether a call is connected through the call-only port and controlling a call connection to a corresponding call number according to a call forwarding request;

When a subscriber and a call are connected through the call-only port, a guide voice transmission / DTMF analysis means for transmitting an input request of a telephone number to be forwarded to a voice message and analyzing the DTMF digits input according to the transmitted message; ;

Memory means for setting a trunk line of the incoming call-only port and a specific subscriber group and a telephone number for each group in a table;

According to the DTMF digits to be analyzed, the subscriber station connected to the extension terminal or the subscriber connected to the call detects the caller's call number from the table of the memory means and requests the incoming call. An extension control means for connecting to the subscriber terminal is characterized in that it comprises a.

According to the present invention having the technical features as described above, when a call connection request is detected from the PSTN through a call-only port, the call is connected and then the call request is inputted as a voice message and the voice message is sent. It analyzes the digits inputted by DTMF signal according to and determines whether the analyzed digit value is the extension number currently in use.If the extension number is called, the call is made by calling the corresponding extension terminal. Search for groups that point to a specific region.

Access the call number of the company located closest to the subscriber who requested the call forward from the table set in the memory means according to the group number indicating the specific area searched and the number of the analyzed digit, and according to the accessed call number Connect the trunk line through the outgoing port to connect the call, and then connect the call forward with the subscriber station that requested the call transfer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As can be seen in Figure 1, the external call forwarding device of the private switching system according to the present invention includes a trunk line connection circuit unit 10, a trunk line control unit 20, a guide voice transmission / DTMF analysis circuit unit 30, and an extension control unit 50. And the memory unit 50, the trunk line connecting circuit unit 10 is connected to the incoming line and the outgoing dedicated line connected to the PSTN network to each port, and any subscriber through the incoming dedicated line through the PSTN network. Detect the call connection signal required from and the call forwarding request signal to any telephone number and apply it to the trunk line control unit 20. Then, according to the subscriber's request, the call forwarding call connection request to the subscriber is established. Output through the PSTN network.

The trunk line connection circuit unit 10 is set such that a call connection request signal originating from a specific region, that is, a station number managed by a telephone station located in the region, is input to a specific port, and each port means a specific region. It is set to a group.

The trunk line control unit 20 establishes a call connection when a call connection request signal for call forwarding is detected from any subscriber, and establishes a call connection and connects a trunk line connection to a company requesting call forwarding and a connection between a connected company and a call forwarding request subscriber. To control.

The guide voice transmission / DTMF analysis circuit unit 30 sends a voice message to the trunk line connected to the call by accessing message data for inputting a desired phone number from the subscriber when a call connection is established with an arbitrary subscriber through a dedicated call line. After analyzing the digits of the DTMF signal input from the subscriber connected to the call according to the transmitted voice message, the analyzed result is output to the extension controller 40. The extension control unit 40 determines whether the input digit information is used as the extension number. If the extension information is used as the extension number, the extension control unit 60 connects the corresponding extension terminal 60. The result of the access by accessing the number is output to the trunk line control unit 20 side. The memory unit 50 is set in such a way that an individual and a number of each company that subscribe to a company that provides a franchise service are tabulated by indexing the CO line group as shown in Table 1 below.

Table 1

Ext. A Group 1 External phone number 1 Group 2 External phone number 2 Group 3 External phone number 3 Group 4 External phone number 4 Ext. B Group 1 External phone number 5 Group 2 External Phone Number 6 Group 3 External phone number 7 Group 4 External phone number 8 . . . Ext. C Group 1 External phone number 9 Group 2 External phone number 10 Group 3 External Phone Number 11 Group 4 External Phone Number 12

Referring to FIG. 2, an operation for providing a call forwarding service in a private exchange system according to the present invention having the above-described function is as follows.

If a call connection request signal for trunk line transfer is detected from any subscriber connected to the PSTN network to the trunk line control unit 20 through any trunk line port of the trunk line connection circuit unit 10 (S101). In response to the detected call connection request signal, the trunk line control unit 20 connects the corresponding port to form a call path, and then the call voice transmission / DTMF analysis circuit 30 indicates that the call path is formed through an arbitrary port. Notify the side.

At this time, the guide voice transmission / DTMF analysis circuit unit 30 accesses the set voice message data, for example, enter the desired phone number. Send a voice message to the subscriber connected to the call (S102).

As described above, when a DTMF signal input from a subscriber connected to a call is detected according to the transmission of a message requesting the input of a telephone number, the trunk line control unit 20 detects the DTMF signal and transmits the data to the guide voice transmission / DTMF analysis circuit unit 30. Send it through.

The guide voice transmission / DTMF analysis circuit unit 30 analyzes each digit of the input DTMF signal and then applies the analyzed result to the extension control unit 40 (S103). The extension control unit 40 determines that the analyzed digit is the current extension. It is determined whether or not the number is assigned and used (S104).

If the digit input and analyzed from any of the subscribers connected to the call is the extension number currently being used, the extension controller 40 calls the corresponding extension terminal 60 to connect the call according to the off-hook of the user of the extension terminal 60. If the analyzed digit is not the current extension number, the station control unit 40 is called because the group is designated for each port so that only the station number managed by each telephone station is received on each port of the incoming line. The originating group connected to the call is retrieved from the trunk line (S106).

When the search of the calling party connected to the call is completed, the calling party's number and the phone number inputted by the DTMF from the subscriber's terminal are retrieved from the subscriber's number table set in the memory unit 50. Detecting a call number for the call forwarding to the worker in the industry that is located closest to the user (S107).

When the call number for call forwarding is detected, the extension control unit 40 applies the detected result to the trunk line control unit 20, and the trunk line control unit 20 does not currently use any call-only random call according to the applied call number. By connecting the port of the call to the number detected above to connect the call to the outside and then to the call forwarding requester and the external call (S108).

When the on-hook signal to block the call connection from any other party is detected while the call is maintained through the call connected through the call forward as described above, the trunk line control unit 20 controls the trunk line connection circuit unit 10 The incoming call-only port and the outgoing-only port are reset to form a call connection request waiting state.

Referring to the operation for the call forwarding made as described above as an example as follows.

The area under jurisdiction at any telephone station A is called A, the area under jurisdiction at telephone station B is called, and if each region has a moving center, for example, and they all want to be called 2424, the jurisdiction at telephone station A In this case, the region designated as group 1 is designated as group 1 so that the call is received only by a random port, and the area under jurisdiction at the telephone company B is designated as group 2 so that the call is received by another random port only. Using the group number and '2424' as an index, set the phone number of the moving center located in Gap area in Group 1 2424 and the phone number of the moving center located in Gul area in Group 2 2424.

As described above, any subscriber to the PSTN network located in Gap area wants to receive call forwarding service while the phone number of the moving center and group number of the phone number connected to the destination port is set. When the connection request is detected by the trunk line control unit 20 through any port of the trunk line connection circuit unit 10, a call is connected between the private exchange system and the subscriber who requested the call transfer, and the information on the call connection is guided voice transmission / DTMF analysis. A voice message applied to the circuit unit 30 and requesting input of a desired telephone number is transmitted to the subscriber terminal.

At this time, when the user of the subscriber station inputs a specific number to be forwarded according to the voice message, the DTMF digit of the inputted specific number is analyzed by the DTMF analysis circuit unit and applied to the extension control unit 40 side.

In this case, when the analyzed specific number is a number currently being used as an extension, the extension control unit 40 calls the corresponding extension terminal 60 to connect a call between the subscriber station requesting a call connection and the extension terminal 60. , If the number is not used as an extension, the incoming call is detected by the detection of the connected port, so the calling group can be detected as 1, so the call number 2424 entered from the table set in the memory section 50 is called. Find the external subscriber number to be connected and call the call, then transfer the call to the subscriber terminal that requested the call transfer.

As described above, the present invention provides a subscriber station requesting a call forwarding service through an intelligent network, thereby connecting a corresponding company located closest to the area where the terminal requesting service is located. The efficiency of service provision is increased because each registrar can provide a service by assigning a plurality of external call numbers to a specific number that prefers a number easily associated with the business.

Claims (2)

In the private exchange system, the call-only port and the call-only port are connected to the PSTN network, and each of the call-only ports is configured to only receive calls originating from a specific area, and indicate a specific area for each call-only port. Trunk line connecting means for designating a group to be connected; Trunk line control means for notifying a lower device whether a call is connected through the call-only port and controlling a call connection to a corresponding call number according to a call forwarding request; When a subscriber and a call are connected through the call-only port, a guide voice transmission / DTMF analysis means for transmitting an input request of a telephone number to be forwarded to a voice message and analyzing DTMF digits inputted according to the transmitted message; ; Memory means for setting a trunk line of the call-only port and a telephone number of a specific company group and a group in a table; A subscriber who requests an incoming call by connecting to an extension terminal according to the DTMF digit to be analyzed or detecting a call number of a company requesting a call transfer from the table of the memory means and making a call through the trunk line connection means. External call forwarding device of the private exchange system comprising an extension control means for connecting with the terminal. A call forwarding method of a private switching system comprising the steps of: connecting a call and sending an input request of a desired telephone number as a voice message when a call connection request is detected from the PSTN through a dedicated port; Analyzing the digits input to the DTMF signal according to the voice message transmitted in the above process to determine whether the analyzed digit value is an extension number currently in use; Calling the corresponding extension terminal in the case of the extension number and searching for a group indicating a specific region through the incoming port if not the extension number; Accessing a call number of a company located closest to the subscriber who requested the call transfer from the table set in the memory means according to the group number indicating the searched specific region and the analyzed digit number; And a call forwarding connection with a subscriber station requesting call forwarding after connecting a trunk line by connecting a trunk line through an outgoing dedicated port according to the accessed call number.