KR20010028208A - Method for switching and waiting the telephone call of a telephone subscriber - Google Patents

Abstract

PURPOSE: The method for switching and holding the call of a private line subscriber is provided to switch the call to another subscriber that has not an idle state and thereby hold the call, when one subscriber who uses a private switching center fails to receive the call. CONSTITUTION: It is determined if a call signal is received from outside(S100). If the call signal is received, the private line subscriber corresponding to the call signal is determined(S200), and then the call signal is connected to the corresponding subscriber(S300). It is determined if the call signal that is making a call has to be switched to one of private line subscribers(S400). The state of the subscriber to whom the call signal is switched, is checked(S500). The state of the subscriber thereto is busy(S600), the private line to which the call signal is switched is selected(S700). The call signal is switched to the selected private line in order to be held(S800).

Description

Method for switching and waiting the telephone call of a telephone subscriber}

The present invention relates to a method for switching and holding a call request signal, and more particularly, when a call is transferred to another person, a method for automatically switching a call and holding the call even if the person is busy. It is about.

First of all, PBX stands for Private Branch Exchange.

An internal exchange is an exchange which performs exchange connection between the extension telephones of the premises (local telephone line) telephones or between the extension telephones and the trunk lines (telephone telephone telephone lines) at workplaces such as government offices, companies, factories and hotels.

The branch exchange system is a revolving premises exchanger that performs all connections such as incoming / outgoing connections from trunk lines to stations, outgoing connections from stations to trunk lines, and interconnections between stations. After the change, it has evolved and developed into an electronic branch exchange (EPBX) of accumulated program control method using a microprocessor or IC memory.

The Electronic Branch Exchange (EPBX) has the ability to perform more than 100 different services, such as timed calls and simultaneous data transfer, and has become an indispensable device in the establishment of local area networks, as well as ISDN. .

There are two types of currency path methods: the spatial division currency path method and the time division currency path method. A digital PBX, which encodes and exchanges an audio signal (analog signal) in several forms of electric signals, is called a digital PBX.

Digital PBX connects OA devices such as PCs, word processors, and facsimile machines used in the premises to convert and multiply data and voice into digital signals so that multiple signals can be simultaneously transmitted and communicated on a single line (transmission path). .

Therefore, the digital PBX is a key device of the digital network, which is a higher communication means, and occupies a very important position for effective LAN construction and ISDN construction.

In using such a private exchange, when a call is transferred, the subscriber does not know the state of the subscriber to be switched.

At this time, if the extension subscriber to be switched is in the idle state, the call is transferred, but the call is not switched if it is not in the idle state.

In particular, in the case of an extension subscriber used by an operator, if a number of calls are received and the extension subscriber who wants to switch is not in a dormant state, the operator puts a call on hold and then continues the state of the subscriber who wants to switch. If the extension is in dormant state, it must re-call the pending call and then switch to that extension.

Accordingly, the present invention has been devised to solve such problems, and an object of the present invention is to provide an extension subscriber who is not in an idle state when an extension subscriber using a private exchange does not receive a call attempting to connect to him. The present invention provides a method for transferring a call and automatically holding the call.

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

2 is a system configuration diagram for performing a method of switching and holding a call of an extension subscriber according to the present invention;

3 is a flowchart illustrating a method of diverting and holding a call of an extension subscriber according to the present invention.

<Description of the code | symbol about the principal part of drawing>

100: control unit 101: memory

102: trunk line connection unit 103: switching unit

104: DTMF receiver 105: DTMF transmitter

106: subscriber connection unit 107: ring generating unit

108: tone generating unit 120: control terminal

130: timer 200: exchanger system

201: server 211: extension telephone

221: computer

In order to achieve the above object, a method of switching and holding a call of an extension subscriber according to the present invention includes determining whether a call signal for calling with one of the extension subscribers connected to an exchange system has been received from the outside; In response to receiving the call signal, calling the corresponding first extension subscriber; Determining whether to transfer the call to another one of the extension subscribers during a call with the first extension subscriber; As a result of the determination, when the call is switched, checking a state of a second extension subscriber to make a call among the extension subscribers; And if the state of the second extension subscriber is busy, as a result of the check, after setting the second extension subscriber, switching the call signal and holding the call signal.

Hereinafter, the objects, features, and advantages of the present invention described above will be described in more detail with reference to the preferred embodiments of the present invention shown in the accompanying drawings.

1 is a block diagram of a private switching system to which the present invention is applied and includes a control unit 100, a memory 101, a trunk line connecting unit 102, a switching unit 103, a DTMF receiving unit 104, and a DTMF transmitting unit 105. And subscriber connection unit 106, ring generation unit 107, tone generation unit 108, extension subscriber's telephone 111 ~ 11n, control terminal 120 and timer 130.

Referring to Figure 1 describes the overall operation of the private exchange system to which the present invention is applied.

The controller 100 performs the overall control operation of the private exchange system.

The memory 101 stores a program for the control operation of the other control unit 100 in the embodiment of the present invention, stores data generated under the control of the control unit 100, and the call forwarding function is not set in the system. Save the extension or group of extensions for automatic forwarding to the extension.

The trunk line connecting unit 102 transmits a signal transmitted from the exchanger connected through the trunk line to the switching unit 103 under the control of the controller 100.

The switching unit 103 switches the communication path between the trunk line connecting unit 102 and the station connecting unit 106 under the control of the control unit 100.

The DTMF receiving unit 104 is connected to the control unit 100 and the switching unit 103, and converts the DTMF signal output from the switching unit 103 into digital data and outputs the digital data to the control unit 100.

When the control unit 100 and the switching unit 103 are connected, the DTMF transmitter 105 outputs data output from the control unit 100 through the switching unit 103 as a DTMF signal.

The subscriber access unit 106 transmits the signal transmitted from the switching unit 103 to the connected telephones 111 to 11n and the signal transmitted from the connected telephones 111 to 11n under the control of the control unit 100. To pass).

The ring generating unit 107 generates a ring signal and connects through the subscriber access unit 106 when a call request is made from a specific telephone of the trunk line connection unit 102 or the subscriber access unit 106 under the control of the control unit 100. To the phone 111-11n.

The tone generator 108 generates various tone signals under the control of the controller 100 and transmits them to the switching unit 103.

Telephones 111 through 11n are terminals of extension subscribers.

The control terminal 120 controls the private exchange system as a whole through the control unit 100.

The timer 130 generates a current time data as a clock chip IC and outputs it to the controller 100.

Hereinafter, a method of switching and holding a call of an extension subscriber of the present invention will be described in detail with reference to FIGS. 1 to 3.

First, it is determined whether a call signal for communicating with one of the extension subscribers connected to the exchange system has been received from the outside (step S100).

Here, the determination may be performed by determining whether or not the call signal is received by the control unit 100 of the switchboard system 200 shown in FIG. 2 through a local area network (LAN).

As a result of the determination, when the call signal is received, after determining the corresponding extension subscriber for the call (step: S200), the call signal is connected to the corresponding extension subscriber to perform a normal call (step: S300). .

Here, according to the control of the control unit 100, any one of the telephones 111 to 11n connected to the signal transmitted from the switching unit 103 for switching the communication path between the trunk line connecting unit 102 and the subscriber connecting unit 106. It is possible by sending one.

In addition, when the call signal is received, information related to the call signal is transmitted from the exchange system 200 to the server 201 running the server computer communication application through a computer telephony integration (CTI) link, and the local telephone through the local area network. It is transmitted to the computer 221 in one-to-one correspondence to 211, and the client computer communication application of the computer 221 displays information on the incoming call.

The control unit 100 determines whether to switch the call signal, which has been in communication with the corresponding extension subscriber, to one of the extension subscribers (S400).

As a result of the determination, when the call signal is re-switched, the state of the extension subscriber receiving the re-switched call signal among the extension subscribers is checked (step S500).

This is when the client computer communication application of the computer 221 attempts to divert a call, and determines whether or not the other extension subscriber desired to divert is idle.

As a result of the determination, when the state of the extension subscriber is busy (step: S600), input or select an extension for switching the call signal (step: S700) and press the "Automatic hold after switching" button. When pressed, it sends a " automatic hold after switching " message to the exchange system 200 via a CTI link.

Thus, the exchange system 200 receives the message " automatic hold after switching " to hang up the call with the extension telephone 211, and to the extension subscriber who entered or selected in the client computer communication application of the computer 221. After switching the signal, the call signal is automatically held to the selected extension subscriber (step S800).

Although the preferred embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that the present invention may be modified without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Therefore, changes in the future embodiments of the present invention will not be able to escape the technology of the present invention.

As described above, according to the present invention, an extension subscriber who wants to switch in switching a call can be switched even when not in a dormant state, and the converted call has an advantage of being automatically held by the extension subscriber. .

It can also be used efficiently when an operator handles multiple calls.

Claims (1)

Determining whether a call signal for calling with one of the extension subscribers connected to the exchange system has been received from the outside; In response to receiving the call signal, calling the corresponding first extension subscriber; Determining whether to transfer the call to another one of the extension subscribers during a call with the first extension subscriber; As a result of the determination, when the call is switched, checking a state of a second extension subscriber to make a call among the extension subscribers; And When the state of the second extension subscriber is busy, as a result of the checking, after setting the second extension subscriber, switching the call signal and holding the call; How to switch to hold.