KR20020017266A - Outside receiving registration apparatus and method for private branch-exchange - Google Patents

Abstract

PURPOSE: An external call transfer registration apparatus and method in a PBX(Private Branch eXchange) is provided to register a call transfer function through a digital line at the external. CONSTITUTION: An external call transfer registration apparatus in a PBX consists of a trunk part(200), a trunk control part(100), a DTMF tone analysis part(300), a station control part(400), a station part(500), and an external call transfer registration part(600). The trunk part(200) forms a call line with a PSTN by the control of the trunk control part(100). The trunk control part(100) detects a trunk terminated through the trunk part(200), determines a station according to the detected trunk, and makes a call line formed between the trunk part(200) and the determined station. The DTMF tone analysis part(300) analyzes a DTMF signal received through the trunk part(200). The station control part(400), controlling the operations of the station part(500), checks the state of a station, if the station is in a no-answer state, and controls an external call transfer operation. The station part(500) outputs a ring signal to a relevant station by the control of the station control part(400). The external call transfer registration part(600) stores external destination numbers or replaces a previously stored external destination number with a new number according to the control of the station control part(400).

Description

Outgoing call registration device and method of private exchange {OUTSIDE RECEIVING REGISTRATION APPARATUS AND METHOD FOR PRIVATE BRANCH-EXCHANGE}

The present invention relates to an external incoming registration device and method of a private exchange, and more particularly, to an external incoming registration device and method of a private exchange that enables registration of a call transfer from the outside of a private exchange using a digital trunk as a trunk line. .

As a general external call forwarding registration method, there is a method of registering by pressing a unique function code on a telephone or another extension telephone to be registered.

In addition, as a method of registering a call forwarding from the outside, a direct inward system access (hereinafter referred to as "Disa") line is set as a trunk line, and when the incoming line is reached, the DTMF tone is recognized by occupying the trunk line.

Then, if the external user number is registered after pressing the call forwarding function code from the outside, the incoming signal coming from the corresponding extension is received at the registered external user number.

In other words, by using the Desa function of the private exchange device to access the system from outside and make long distance phone calls through other trunk lines of the system, the outside user can receive a signal received by his / her extension by registering a call forward. To help.

However, the prior art operating as described above has a problem of registering a call forwarding on a digital line, which is not applicable to a digital line such as a digital trunk currently widely used for trunk lines.

Accordingly, the present invention has been made in view of the above problems, and an object thereof is to provide an external incoming registration device and method of a private exchange which enables registration of an external incoming transfer function in a digital line.

1 is a block diagram showing the configuration of an outbound call registration device of the private exchange of the present invention.

Figure 2 is a flow chart for the outbound call registration method of the private exchange of the present invention.

***** Description of the symbols for the main parts of the drawings *****

100: trunk line controller 200: trunk line

300: DTMF tone analysis unit 400: station control unit

500: internal 600: external call forwarding register

The present invention for achieving the above object is connected to the public network, the trunk line unit for forming or blocking a communication line with the public network under the control of the trunk line control unit; A trunk line control unit for detecting a trunk line received through the trunk line unit and determining a station according to the trunk line to form a call line between the trunk line unit and the station; DTMF tone analysis unit for analyzing the DTMF signal received through the trunk line; An extension control unit which receives the output signal of the DTMF tone analysis unit and controls the operation of the extension unit to notify the corresponding extension of the DTMF tone analyzer, and checks the state of the extension if the extension is not answered, and controls the incoming call switching operation accordingly; ; An extension unit for outputting a ring signal informing of a predetermined extension by the control of the extension control unit; Under the control of the extension control unit, characterized in that it comprises an external call forwarding registration unit for storing the external incoming number, or by changing the previously stored external incoming number to a new external incoming number.

In order to achieve the above object, the present invention provides a method for registering an incoming call on a private exchange, comprising: a first step of determining whether the incoming extension is an extension capable of registering a call transfer from the outside when an incoming call is detected through a trunk line; A second step of determining whether the external call forwarding signal is a valid signal when the external call forwarding signal is inputted after the dial tone is transmitted if the call forwardable extension is external from the determination result of the first step; If the external call forwarding signal is a valid signal as a result of the determination of the second step, the external call forwarding signal may be stored as a third step of storing the external call forwarding signal according to the presence or absence of contents of the corresponding incoming extension area of the external call forwarding registration unit.

Hereinafter, with reference to the accompanying drawings, the operation and effects of the external incoming call registration device and method of the private exchange according to the present invention will be described in detail.

1 is a block diagram showing the configuration of an incoming call registration device of a private exchange of the present invention, which is connected to a public network as shown in FIG. Trunk line portion 200 to form or block; A trunk line control unit 100 for detecting a trunk line received through the trunk line unit 200 and determining an extension accordingly to form a call line between the trunk line unit 200 and the extension line; DTMF tone analysis unit 300 for analyzing the DTMF signal received through the trunk line unit 200; Receives the output signal of the DTMF tone analysis unit 300 and controls the operation of the extension unit 500 to be described later to notify the corresponding extension accordingly, and if the extension is not answered, check the state of the extension accordingly An extension control unit 400 for controlling an incoming call switching operation; An extension unit 500 for outputting a ring signal informing of a call to a predetermined station under the control of the extension controller 400; Under the control of the extension control unit 400, the external call forwarding registration unit 600 stores the external incoming number or changes the pre-stored external incoming number into a new external incoming number.

FIG. 2 is a flowchart illustrating an operation of registering an incoming call of a private exchange of the present invention. As shown in FIG. 2, when an incoming call is detected through a trunk line, a first step of determining whether the incoming extension is an extension capable of registering a call transfer from the outside is provided. ; A second step of determining whether the incoming call transfer signal is a valid signal when the external call transfer signal is input after the dial tone is transmitted when the extension of the incoming call is possible from the outside; If the external call forwarding signal is a valid signal as a result of the determination of the second step, the external call forwarding registration unit 600 stores the external call forwarding signal according to the presence or absence of the content of the corresponding incoming extension area. The operation of the invention will be described.

First, the trunk line unit 200 is connected to the public network, receives an internal call signal input through the public network, and applies it to the trunk line control unit 100, and then the trunk line control unit 100 receives the internal call signal. The destination station is determined according to the above. In this case, the trunk line control unit 100 determines the destination station by analyzing the received digits because the trunk line is used as E1 / T1 and ISDN.

Then, when the incoming extension is determined, the extension control unit 400 searches for incoming call transfer registration information of the incoming extension and operates accordingly.

First, when the external call forwarding function is not registered in the incoming extension, the extension control unit 400 sends a message or ring indicating that the call is received through the extension unit 500, and then the response is received from the extension for a predetermined time. If not, it performs a non-response process and checks if it is set to an extension that can register a call forwarding function from the outside.

At this time, the extension control unit 400 transmits the silence to an external user if the extension is possible to register the call forwarding function and resends the dial tone at a predetermined time interval, and the external subscriber receives an external call forwarding registration code when the dial tone is heard. And password and the required telephone number.

Then, the DTMF tone analysis unit 300 transmits the digits input through the CO line 200 to the extension control unit 400, and the extension control unit 400 analyzes the digits to provide a function code and an external subscriber number. Separate and store in the external call forwarding register 600 with the incoming extension information.

After that, if there is no digit input for a predetermined time, the trunk line controller 100 considers the digit input to be completed and controls the trunk line unit 200 to recover the incoming trunk line.

Second, when the external call forwarding function from the outside is registered in the incoming extension, the extension control unit 400 transmits a message or ring indicating that the call is received through the extension unit 500, and then responds to the extension for a predetermined time. If it is not there, it performs a non-response process and checks if it is set as an extension that can register a call forwarding function from the outside.

At this time, if it is determined that the call forwarding function is registered and the call forwarding is registered, the extension control unit 400 transmits the silence to an external subscriber and resends the dial tone at a predetermined time interval, and the extension control unit ( 400, if the digit input information is not received from the DTMF tone analysis unit 300 for a predetermined time, search the area of the external call forwarding registration unit 600 corresponding to the incoming extension information and transmit the stored external subscriber number to the trunk line control unit 100. To pass.

Then, the trunk line controller 100 connects the incoming trunk line with the outgoing trunk line to enable mutual communication.

Third, when changing or canceling the contents of the registered external incoming power, the extension control unit 400 sends a message or ring indicating that the call is received through the extension unit 500, and then the response is received from the extension for a predetermined time. If not, it performs a non-response process and checks if it is set to an extension that can register a call forwarding function from the outside.

At this time, the extension control unit 400 transmits the silence to an external user if the extension is possible to register the call forwarding function and resends the dial tone at a predetermined time interval, and the external subscriber receives an external call forwarding registration code when the dial tone is heard. And password and the required telephone number.

Then, the DTMF tone analysis unit 300 transmits the digits input through the trunk line unit 200 to the extension control unit 400, and accordingly, the extension control unit 400 analyzes the digits to function code and external subscriber. The previously stored contents are changed by separating the numbers and storing them in the incoming area of the external call forwarding registration unit 600.

After that, if there is no digit input for a predetermined time, the trunk line controller 100 considers the digit input to be completed and controls the trunk line unit 200 to recover the incoming trunk line.

As described in detail above, the present invention has the effect of increasing the usefulness and convenience of the private exchange by registering, canceling, and changing an external call forwarding function in a trunk line using a digital trunk.

Claims (4)

A trunk line unit connected to a public network to form or block a communication line with the public network under control of a trunk line controller; A trunk line control unit that detects a trunk line incoming through the trunk line unit and determines an extension accordingly to form a call line between the trunk line unit and the station; DTMF tone analysis unit for analyzing the DTMF signal received through the trunk line, An extension control unit which receives the output signal of the DTMF tone analysis unit and controls the operation of the extension unit to notify the corresponding extension of the DTMF tone analyzer, and checks the state of the extension if the extension is not answered, and controls the incoming call switching operation accordingly; ; An extension unit for outputting a ring signal informing of a predetermined extension by the control of the extension control unit; Under the control of the extension control unit, the external call forwarding registration device of the private exchange comprising: an external call forwarding registration unit for storing the external call forwarding number or changing the previously stored external call forwarding number to a new external forwarding number. In the external incoming call registration method of the private exchange, A first step of determining whether the incoming extension is an extension capable of registering a call transfer from the outside when the incoming call is detected through the trunk line; A second step of determining whether the incoming call forwarding signal is a valid signal when the external call forwarding signal is input after the dial tone is transmitted if the extension of the call forwarding is possible from the outside; If the external call forwarding signal is a valid signal as a result of the determination in the second step, the external call forwarding signal is stored in a third step according to the presence or absence of contents of the corresponding incoming extension area of the external call forwarding registration unit. How to register a call. 3. The method of claim 2, wherein the call forwarding signal comprises a function code, a telephone number, and a password. 3. The method of claim 2, wherein the second step includes searching for an area of the external call forwarding register corresponding to the incoming extension number if the external call forwarding signal is not a valid signal and calling a pre-stored external subscriber number to connect with the called party line. Outgoing call registration method of the private exchange, characterized in that.