KR20030057047A - method for automatically delivering a terminating call of the semi-switching system - Google Patents

Abstract

PURPOSE: A method for automatically distributing receiving calls of a PBX is provided to load caller's local information into a receiving call by using a CID(Caller ID) function, and to perform a call forwarding process to a lower telephone group without errors, thereby precisely processing the receiving call. CONSTITUTION: A main processor performs an initialization process(S1), and decides whether a call signal is received(S2). If the call is transmitted from a local telephone, the main processor processes CID information supplied from the local telephone, and confirms local information of a calling telephone number(S4). The main processor retrieves telephone numbers of a specific group located in a corresponding region by using the local information of the calling telephone number(S5). The main processor automatically forwards a call with a telephone number of the corresponding group, and carries out a call function(S6).

Description

Method for automatically delivering a terminating call of the semi-switching system

The present invention relates to a method for automatically distributing an incoming call to a private exchange. Particularly, when a call is transmitted from a private exchange to a private exchange, a caller's area of an incoming call received from the private exchange is transmitted using a CID function. The present invention relates to a method for automatically distributing an incoming call to a private exchange that uses information to transfer a call to a local sub phone group without error.

In general, as the industrial society develops, information communication systems are widely used to transfer data from one point to another desired more appropriately and quickly. Such communication systems are usually homogeneous or heterogeneous communication devices which are geographically dispersed. In most cases, information devices are connected to a network to enable sharing and communication of resources. In the network, a switch is usually used to exchange information converted into an electrical signal with a counterpart, and is divided into a subscriber transmission connecting a subscriber and an exchange and a transmission between stations connecting an exchange period.

In particular, various types of systems are currently developed and used in the exchange system for subscriber transmission in terms of large facility capacity, and among these switches, a simple exchange (private exchange) for a building or a small subscriber is widely used.

Then, referring to the conventional private exchange system as described above with reference to Figure 1, the relay line call processing unit 72 for detecting a communication signal transmitted from the external local exchange 70 through the transmission line 71, and the relay line call Subscriber call processing unit 73 for processing a predetermined signal by the communication unit 72 through the communication unit 72 connected to a predetermined telephone group, and the subscriber call processing unit 73 to control the overall function of the private exchange 74 It consists of a control unit 76 for controlling the signal connection of various group and individual telephones (75A-N) and external callers connected to the extension.

Here, the local exchange 70 includes a call signal processing unit 78 for processing a call signal of the external telephone 77 approaching the local exchange 70.

On the other hand, looking at the operation of the conventional private exchange as described above, when the call signal is sent from any telephone 77 connected to the public telephone network, the call signal is a call signal processing unit of the local exchange 70 of the call area ( 78). Then, the call signal processing unit 78 of the local exchange 70 processes the predetermined call signal of the caller telephone 77 to the relay line call processing unit 72 of the private exchange 74 connected to the corresponding telephone number. Input the ring signal. The relay line call processing unit 72 processes the received call request signal into a predetermined signal and inputs it to the control unit 76. Then, the control unit 76 applies a ring signal to the subscriber telephone 75A-N corresponding to the call request signal through the subscriber call processing unit 73 to form a normal call.

Here, since the control unit 76 of the private exchange 74 receives only a ring signal from the call signal processing unit 78 of the local exchange 70, the representative group telephone number (* DIL) preset through the subscriber call processing unit 73 Connect incoming call with).

The representative group telephone number [* DIL (Direct in line)] refers to a method of connecting to a group telephone number in a predetermined private exchange when an incoming call occurs on a specific relay line.

However, in the conventional call processing method of the private exchange, the relay line call processing unit merely transmits the ring signal to the private exchange when the local exchange does not give information distinguishing the line connected to the private exchange from the general subscriber line. Since only the handling of the incoming call does not receive any information on the incoming signal, there is a problem in that the frequency of processing errors in the private exchange increases considerably.

Accordingly, the present invention has been invented to solve the above-mentioned conventional problems. When transmitting a call from a private exchange to a private exchange, a caller's area information is transmitted to the incoming call using the CID function and the call is received from the private exchange. By using the caller's local information to transfer the call to the sub phone group of the area without error, the private exchange exchanges the incoming call precisely, thus reducing the frequency of errors in the private exchange. The purpose is to provide automatic call distribution.

Another object of the present invention is that the private exchange can automatically switch to the lower telephone number group through the incoming call containing the caller's local information without additional equipment, so that the functionality of the private exchange is also significantly improved. It is to provide an automatic distribution method of incoming calls.

The present invention for achieving the above object is a caller information processing step of checking the local information of the calling telephone number by processing the CID information provided from the local exchange when the call received from the private exchange is a call transmitted from the local telephone, and the After the caller information processing step, the detailed group phone number verification step of searching and confirming the phone number of a specific group located in the corresponding area using the area information of the call phone number currently confirmed, and the corresponding group confirmed after the detailed group phone number verification step. The present invention provides a method for automatically distributing an incoming call to a private exchange consisting of an automatic call transfer step of executing a call function by automatically transferring a call to a telephone number of a group.

1 is an explanatory diagram for explaining a conventional private exchange.

2 is a block diagram illustrating a private exchange to which the present invention is applied.

3 is a flowchart of the present invention.

<Detailed Description of Codes>

1: local exchange 2: interface unit

3A-N: CO Line or Extension Card 4: Universal Slot

5 private exchange 6 main processor

7: sender information processing unit 8: memory unit

9: LCD 10: ring signal generator

11: telephone 12: call signal processor

13: CID data signal processor 14: PSTN network

15A-N: Extension Phone

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

As shown in FIG. 2, the private exchange system to which the present invention is applied is connected to an external local exchange 1 through an PSTN network, an interface unit 2 for interfacing communication signals, and a trunk line via the interface unit 2. Switching function and caller details (CID) of a certain number of universal slots (4) into which the station cards (3A-N) can be inserted, and the CO lines or extension cards (3A-N) inserted into the universal slot (4). A main processor 6 capable of controlling the overall function of the private exchange 5 including a providing function, and a caller detailed telephone number according to the caller detail control signal of the main processor 6, for example, Caller information processing unit (7) for demodulating the representative telephone number and the exchange method and the exchange number of the caller or demodulating CID information received from the outside, and the extension card according to the function control signal of the main processor (6). It includes a memory unit 8 for storing the exchange number of the caller who executed the call.

In addition, one end of the main processor 6 is connected to the LCD (9) for displaying the internal function operation including the CID information to the outside, and the other end of the main processor (6) through the interface unit (2) A ring signal generator 10 for detecting an input ring signal is connected.

Here, the local exchange 1 has a call signal processing unit 12 for processing a call signal of the external telephone 11 approaching the local exchange 1, and an outgoing telephone transmitted through the call signal processing unit 12. And a CID data signal processor 13 for converting / demodulating CID (Caller ID) information.

Next, the method of the present invention as described above will be described.

The present invention proceeds to the call signal determination step (S2) in the initial state (S1), as shown in Figure 3 to determine whether the current call is a call transmitted from an external local exchange or whether the external or extension connection is desired. At this time, when the call is determined during the call signal determination step (S2) and the current call is desired to be a trunk line or an extension, the call proceeds to the general call function execution step (S3) to request a call to an external telephone number or to an extension Allocate extension channel to execute extension call function.

That is, the main processor 6 of the private exchange 5 is connected to another extension telephone 12 in the case where a call connection is desired from the extension card 3N-1 of the universal slot 4 to another extension card 3N. To execute the extension call function. At this time, the main processor 6 transmits the extension number entered from the called extension telephone 15N-1 to the extension telephone 15N.

On the other hand, the main processor 6 allocates a channel to the external trunk line card 3A selected by the corresponding extension telephone 15N when the call connection is desired from the extension telephone 15N to the external telephone 11. The main processor 6 transmits the corresponding telephone number signal through the trunk line card 3A of the universal slot 4. Then, the transmission signal of the trunk line card 3A is transmitted to the call signal processing unit 12 of the local exchange 1 through the interface unit 2 and the PSTN network 14. Then, the call signal processing unit 12 of the local exchange 1 uses the telephone number signal input from the private exchange 5 to apply a ring signal to the corresponding telephone 11 to form a call.

At this time, the main processor (6) can provide the internal processing of the private exchange (5) as the display information through the LCD (9), and set the function through the keypad unit 13 or ring signal processing unit from the outside ( 10) also execute the ring signal detection function.

On the other hand, if it is determined in the call signal determining step (S2) that the currently received call is a call transmitted from the local telephone, the caller information processing step (S4) proceeds to process the CID information provided from the local exchange to process the local information of the calling telephone number. Check. Then, after the caller information processing step (S4) proceeds to the detailed group phone number verification step (S5) to check the phone number of the specific group located in the corresponding area by using the area information of the currently confirmed call phone number. In addition, after the detailed group telephone number verification step (S5) to proceed to the automatic call conversion step (S6) to automatically switch the call to the phone number of the identified group to execute the call function.

That is, when the call request signal is input from the subscriber telephone 11, the local exchange 1 allows the line connected to the corresponding private exchange 5 through the call signal processor 12 to occupy. At this time, the local exchange 1 processes the CID signal of the caller's telephone number signal currently called through the CID data signal processor 13, for example, a CID signal, and outputs it to the call signal processor 12. do. Also, the local exchange 1 transmits a call request signal including the caller's CID information to the interface unit 2 of the corresponding private exchange 5 through the PSTN network 14 through the call signal processing unit 12. do.

Then, the main processor 6 of the private exchange 5 receives the call request signal transmitted from the local exchange 1 through the trunk line card 3A of the interface unit 2 and the universal slot 4 to sender information. Input to processing unit 7. At this time, the caller information processor 7 processes the input CID information by the CID signal, and inputs, for example, the local information of the caller included in the call request signal to the main processor 6. Then, the main processor 6 checks the representative telephone number of the specific group located in the same region by comparing and searching the representative telephone number signals of the specific group scattered according to the region stored in the memory unit 8. For example, if the caller's area code is "Seoul", the representative phone number of the specific group corresponding to Seoul is checked.

When the representative telephone number of the specific group is confirmed by the above process, the private exchange 5 allocates a channel to the extension card 3N of the universal slot 4 to which the confirmed representative telephone number of the specific group is connected. do. In addition, the main processor 6 applies a ring signal through the ring signal processing unit 10 to the extension card 3N to which the channel is assigned to form a call to the telephone 15N to execute a normal call function.

Therefore, according to the present invention, the private exchange can analyze the caller's local information provided from the local exchange 1, and can accurately recognize and process the telephone number of the specific group through the analyzed information.

As described above, in the present invention, when a call is transmitted from a private exchange to a private exchange, the caller places information on the incoming call using the CID function, and transmits the caller's local information to the incoming call. By switching the call to the telephone group without error, since the private exchange handles the incoming call precisely, it has an advantage of significantly reducing the frequency of processing errors in the private exchange.

In addition, according to the present invention, since the private exchange can automatically switch the call to the lower telephone number group through the incoming call including the caller's local information without additional equipment, the functionality of the private exchange is also significantly improved. There is also.

Claims (1)

If the call received from the private exchange is a call transmitted from the national telephone, the caller information processing step of checking the local information of the calling telephone number by processing the CID information provided from the local telephone exchange, and the calling telephone number currently confirmed after the calling party information processing step. The detailed group phone number verification step of searching and confirming the phone number of a specific group located in the area using the local information of the call, and automatically switches the call to the phone number of the corresponding group confirmed after the detailed group phone number verification step. Automatic distribution of incoming calls to the private exchange, characterized in that consisting of a call automatic switching step for executing a function.