KR100526497B1 - Extension Call Handling Method in Digital Private Switching System - Google Patents

Abstract

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

In a digital private switching system that accommodates digital telephones in an extension, a call processing method is provided when an incoming subscriber does not answer an extension incoming call.

I. The technical problem to be solved by the invention

Even if the called party is not answered to the incoming call, the calling party provides a method for delivering the service to the called party or those around him.

All. Summary of Solution of the Invention

If the called party is unanswered when there is an incoming call, if the autonomous connection key is received from the calling party before the prescribed non-response determination time elapses, the calling party connects the call path and operates the speakerphone of the called party.

la. Important uses of the invention

Used for digital private exchange system.

Description

Extension Call Handling Method in Digital Private Switching System

The present invention relates to a method for processing an incoming call in a private switching system, and more particularly, in a digital private switching system that accommodates a digital telephone in an extension, a method of processing a call when an incoming subscriber does not answer an extension incoming call. It is about.

In general, an example of a case in which a called party does not respond to an extension incoming call, that is, no answer, is as follows. That is, when the called subscriber fails to respond within the prescribed non-response determination time, there may be a case where the called subscriber deliberately disregards the response to the incoming call, and the people around him in the absence of the called subscriber.

As such, when the called subscriber is not answered to the extension incoming call, an error tone is normally heard to the calling subscriber after a predetermined time elapses or the ring is continuously ringed to the corresponding extension. Accordingly, when the called party was not answered to the incoming call, there was no way to deliver it, no matter how urgent and important the calling party was.

As described above, when the called subscriber does not respond to the extension incoming call, there is a disadvantage in that the calling subscriber has no way of notifying his or her request.

Accordingly, an object of the present invention is to provide a method in which an outgoing subscriber can deliver a message to the called subscriber or those around them even when the called subscriber is not answered to the incoming call.

In order to achieve the above object, the present invention provides a call connection between a calling party and a called party when an incoming connection is received when an incoming call is received. And operating the speakerphone of the called subscriber.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Many specific details are set forth in the following description and in the accompanying drawings, in order to provide a more thorough understanding of the present invention. It will be apparent to those skilled in the art that the present invention may be practiced without these specific details. And a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a block diagram of a digital private exchange system to which the present invention is applied, and schematically shows only a configuration necessary for the description of the present invention. The digital private exchange system 100 shown in FIG. 1 includes a central processing unit (CPU) 102, a switching circuit 104, and digital line interface (DLI) modules 106 and 108. The CPU 102 controls the overall operation of the digital private exchange system 100. The DLI modules 106 and 108 accept digital phones as extension subscribers. In FIG. 1, one digital phone 110 is connected to the DLI module 106 and the other digital phone 112 is connected to the DLI module 108 for convenience. Showed an example connected. The switching circuit 104 forms a communication path between the digital telephones 110 and 112 connected to each of the DLI modules 106 and 108. Although not shown in FIG. 1, the digital private switching system 100 is also connected to a public switched telephone network (PSTN) or an integrated services digital network (ISDN) as well known in the art, and accommodates analog telephones. It further includes various components for.

According to the present invention, in the digital private switching system 100 as described above, when the called party does not answer the incoming call, if the calling party wants to deliver the message to the called party or the people around it, the specific key on the digital telephone is sent. To press. The specific key is referred to as "auto-connect key" in the present invention. Auto-connect keys can be used to define one of the function keys found in a typical digital phone or can be arranged separately.

FIG. 2 is a flowchart illustrating a process according to an exemplary embodiment of the present invention, in which operations performed by the CPU 102 in FIG. 1 are shown in steps 200 through 214. When an incoming call occurs, the CPU 102 performs step 200 in response. In the following description, one of the digital telephones 110 and 112 of FIG. 1 is illustrated as one digital telephone 110 is the calling subscriber and the other digital telephone 112 is the called subscriber. In step 200, the CPU 102 starts to send a ring to the called party 112. In step 202, if the receiving subscriber 112 responds by checking whether it responds, it proceeds to step 208, and if it does not respond, proceeds to step 204. In step (204), if the elapse of the non-response determination time has elapsed, the process proceeds to step (210), and if not, the process proceeds to step (206). In step 206, if it is received from the originating subscriber 110 by checking whether the auto-connection key is received, the process proceeds to step 212, and when it is not received, the process returns to step 200 above. Therefore, the steps (200) to (206) described above indicate that the calling party 110 enters the auto-connection key in response to whether the called party 112 responds or does not respond while sending a ring to the called party 112. It is to check whether the judgment time has elapsed.

If the called subscriber 112 responds before the non-response determination time elapses in steps 200 to 206, the ringing stops at step 208 and the switching circuit between the calling subscriber 110 and the called subscriber 112 is stopped. Connect the call path through 104. Accordingly, the call is made between the calling party 110 and the called party 112 as in the usual case. On the contrary, if the called party 112 is not answering and the automatic connection key is not received from the calling party 110 until the non-response determination time elapses in steps 200 to 206, the call ends at step 210. do. If the automatic connection key is received from the calling subscriber 110 before the non-response determination time elapses while waiting for the response of the called subscriber 112 in steps 200 to 206, the ring transmission is stopped at step 212. And connects the call path between the calling party 110 and the called party 112. Next, in step 214, the speakerphone of the called subscriber 112 is operated.

Therefore, even when the called party 112 is not answered to the extension call, the calling party 110 can deliver the message to the called party 112 or the people around the speaker through the speaker of the called party 112.

As described above, the present invention connects the call path between the calling subscriber and the called subscriber and operates the speaker phone of the called subscriber if the calling subscriber wants to answer the extension incoming call. There is an advantage to conveying a message to a person.

1 is a configuration diagram of a digital private exchange system to which the present invention is applied;

2 is a process flow diagram in accordance with an embodiment of the present invention.

Claims (2)

Claims [1] A method of processing a call when a called party does not answer a call when there is an extension call calling the digital phone in a digital private switching system that accommodates a digital phone in an extension. Checking whether the called party responds while sending a ring to the called party when the extension call is received; Waiting for a response of the called subscriber until a prescribed non-response determination time elapses when the called subscriber is unresponsive; Ending the call if the called subscriber is not answered until the non-response determination time elapses; If the automatic connection key is received from the calling subscriber before the non-response determination time elapses, stopping the ring transmission, connecting a call path between the calling subscriber and the called subscriber, and operating the speakerphone of the called subscriber. Extension call processing method. The call extension of claim 1, further comprising: stopping the ring transmission and connecting a call path between the calling subscriber and the called subscriber when the called subscriber answers before the non-response determination time elapses. How to handle a call.