KR19990018360A - How to schedule automatic network dialing in a private exchange system - Google Patents

Abstract

end. The technical field to which the invention described in the claims belongs

How to schedule automatic network dialing

I. The technical problem that the invention is trying to solve

When the other party is busy during automatic network dialing in the private exchange system, the reservation function is set to provide a method of forming a call path between the reserved caller ID and the extension number when the other party ends the call.

All. Summary of the Solution of the Invention

If the private network dialed extension number is busy in the private exchange system, the calling party number is stored according to whether the automatic network dialing reservation function is set, and when the extension is completed, the call path between the stored calling party number and the extension number is stored. Form.

la. Important uses of the invention

In the private exchange system, the call between the leased lines can be formed when the other party's call is automatically terminated even if the other party is in a call without the subscriber retrying by setting the reservation function.

Description

How to Schedule Automatic Network Dialing in a Private Switching System

The present invention relates to a private switching system, and more particularly, to a method for reserving automatic network dialing of a private switching period connected by a leased line.

Typically, a leased line is a line connected to implement a direct call without passing through a trunk line during different private exchange periods. When private exchanges separated from each other are connected by a dedicated line to implement a call during both private exchanges, a call can be made by directly calling the extension or trunk line of the counterpart exchange through the dedicated line.

In general, Automatic Network Dialing (hereinafter referred to as AND) is a function of the exchange number and extension that the extension subscriber of one exchange wants to call the extension subscriber of another exchange when the network is composed of leased lines between private exchanges. Call is established by dialing only subscriber number.

If the AND-receiving subscriber is in a busy state when performing the AND function in the conventional private exchange system, the call is terminated after sending a notification message indicating that the calling subscriber is busy or busy. In such a conventional private exchange system, when the calling subscriber must make a call with the other party, there is a hassle of having to dial until the called subscriber who is the other party ends the call.

Accordingly, an object of the present invention is to provide an automatic network dialing reservation method in a private exchange system.

Another object of the present invention is to store a caller's telephone number when calling the extension subscriber in a private exchange system, and automatically establishes a call path between the caller and the subscriber when the call of the extension subscriber is terminated. In providing.

The present invention for achieving the above object is to store the calling party number according to whether the automatic network dialing reservation function is set when the automatic network dialed extension number is busy in the private exchange system, and the stored caller is finished when the extension number is finished. A call path is formed between the number and the extension number.

1 is a block diagram of an automatic dedicated network to which the present invention is applied.

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

3 is a diagram illustrating a process of performing an automatic network dialing reservation function according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

FIG. Is a block diagram of a private exchange system connected by a dedicated line to which the present invention is applied.

A schematic operation of a private exchange system connected by a dedicated line will be described with reference to FIG. 1. Private exchanges 110 and 120 are provided with a plurality of extensions, trunk lines and dedicated lines to perform the exchange function according to the call request. Extension terminals 111 and 121 represent subscriber terminals corresponding to extension subscribers of private exchanges 110 and 120.

The block configuration of the private exchanges 110 and 120 is as shown in FIG. Referring to Figure 2, the central processing unit 200 controls the overall operation of the private exchange 110, 120 according to the set program. In addition, the central processing unit 200 performs control according to the set incoming call service type. The memory 210 stores operation programs and data of the central processing unit 200. In addition, the memory 210 stores the AND code and the trunk line call code as shown in FIG. 3 to perform the exchange function in the private exchange 110 or 120. The switching circuit 220 connects the subscriber line subscriber of the trunk line circuit 270 or the extension terminals 111 and 121 of the extension circuit 230 to which the incoming call is input under the control of the central processing unit 200. The internal circuit 230 connects an internal terminal for making a call request among a plurality of internal terminals under the control of the central processing unit 200 to the switching circuit 220. The ring generator 240 generates a ring signal for informing a call request under the control of the central processing unit 200 when an incoming call for a call to a specific extension terminal is received through the extension circuit 230 or the trunk line circuit 270 and transmits it to the corresponding extension terminal. . The tone generator 250 generates various tone signals under the control of the central processing unit 200 and outputs them to the switching circuit 220. The dedicated line circuit 260 has a plurality of dedicated lines connecting the private exchangers 110 and 120 separated from each other, and connects a plurality of dedicated lines introduced from the counterpart private exchange to the switching circuit 220. The trunk line circuit 270 connects a plurality of general trunk lines drawn from a local exchange (not shown) to the switching circuit 220 under the control of the central processing unit 200. The DTMF transceiver 280 transmits the DTMF signal to the switching circuit 220 under the control of the central processing unit 200, receives the DTMF signal received from the switching circuit 220, converts the digital signal into digital data, and outputs the DTMF signal to the central processing unit 200. The R2 transmitter / receiver 290 sends an R2 signal to the switching circuit 220 under the control of the central processing unit 200, receives the R2 signal received from the switching circuit 220, converts it into digital data, and outputs it to the central processing unit 200. The automatic voice guide unit 290 transmits the guide message according to the embodiment of the present invention to the internal circuit 230 or the trunk line circuit 270 through the switching circuit 220 under the control of the central processing unit 200.

3 is a diagram illustrating a process of performing an automatic network dialing reservation function in a private exchange system according to an embodiment of the present invention.

An automatic network dialing reservation method in a private exchange system according to an embodiment of the present invention will be described with reference to FIGS. In step 300, the central processing unit 200 receives the calling party number and the AND number transmitted from the trunk line circuit 270 through the switching circuit 220. In operation 310, the CPU 200 determines whether an AND number transmitted from the switching circuit 220 is an ID of a local station. If the transmitted AND number is the self-exchange node number, the next input number is determined as the extension number. If the transmitted AND number is the self-exchange node number, the central processing unit 200 receives the extension number transmitted from the trunk line circuit 270 through the switching circuit 220 in step 311 when it is the ID of the own switch. In step 320, the CPU 200 determines whether the transmitted extension number is busy through the extension circuit 230. If the transmitted extension number is busy, the CPU 200 determines whether an AND reservation function is set for the subscriber of the extension number in step 330. If the AND reservation function is set, a notification message indicating that the AND reservation function is set or a tone indicating that the AND reservation function is set is sent. If the AND reservation function is set, in step 331, the CPU 200 stores the transmitted source number in a buffer of the AND reservation function. In step 340, the central processing unit 200 determines whether the subscriber call of the extension number is terminated through the extension circuit 230. When the subscriber call of the extension number ends, in step 341, the central processing unit 200 dials the calling party number stored in the buffer of the AND reservation function. In operation 350, the CPU 200 determines whether there is a response from the dialed caller ID. If there is a response from the dialed caller number, a ringback tone is transmitted to the caller, and in step 351, the central processing unit 200 controls the extension circuit 230 to call the extension. In step 352, the central processing unit 200 controls the switching circuit 220 to form a call path between the caller and the extension when the calling extension subscriber answers.

As described above, in the private switching system, when there is a call attempt between leased lines, when the call is terminated when the extension to which the call is attempted is established, a call path between the extension and the caller is automatically formed. Therefore, the present invention has the advantage of providing a reserved call function for the subscriber in the call during automatic network dialing in a private exchange system.

Claims (4)

In the private network dialing reservation method in a private exchange system, if the automatic network dialed extension number is busy, the calling party number is stored according to whether the automatic network dialing reservation function is set, and when the extension is completed, the stored calling party number is stored. Automatic telephone dialing reservation method in a private exchange system, characterized in that for forming a call path between the extension and the extension number. An automatic network dialing reservation method in a private switching system comprising the steps of: receiving a calling party number and an AND number to determine whether the AND number is a node number of the own station; and a number input when the AND number is a node number of the own station. Recognizing as an extension number, determining whether the subscriber of the extension number is in a call, determining whether an AND reservation function is set when the subscriber of the extension number is in a call; If the function is set, an automatic network in a private exchange system is formed, which stores a caller number and establishes a call path between the caller and the subscriber according to whether or not the call of the extension subscriber in the call is terminated. How to schedule dialing. 3. The automatic network dialing reservation method according to claim 2, further comprising the step of: if the AND reservation function is set, sending a guide message informing the calling party of the setting of the AND reservation function. An automatic network dialing reservation method in a private switching system connected by a leased line, the method comprising: determining whether to set an automatic network dialing reservation function when an extension subscriber of a call is busy when there is a call attempt by automatic network dialing; When the extension subscriber is busy, transmitting a announcement or tone notifying the caller that the automatic network dialing reservation function is set; Automatic network dialing reservation method in a private exchange system comprising the step of forming a communication path between.