KR19990015304A - Reserved call forwarding device and method in keyphone system - Google Patents

Abstract

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

The present invention relates to a call forwarding device and a method in a key phone system.

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

The present invention provides a call forwarding device and a method in a key phone system.

All. Summary of Solution of the Invention

In a reserved call forwarding device in a key phone system, a call forwarding start / release time and a target phone number and a destination phone number, which are call forwarding data, are set, and when the call forwarding start time is reached, the call forwarding start signal and call forwarding data are set. And a digital line for outputting a call forwarding release signal, a communication terminal having the target phone number, and a call forwarding start signal and call forwarding data output from the computer through a predetermined relay. A key phone system configured to receive incoming calls through an interface and to set up incoming calls, and to receive incoming call cancellation signals outputted from the computer through a predetermined relay to the digital line interface to cancel incoming calls; Connect the input and output signals or data between the telephone lines It characterized by a portion yirueojim interface for relaying the matched.

la. Important uses of the invention

Used for call forwarding of key phone system.

Description

Reserved call forwarding device and method in keyphone system

The present invention relates to a call forwarding device and method of a key phone system, and more particularly to a call forwarding device and method in a key phone system that automatically transfers the call forward and release at a scheduled time using a computer application.

In the conventional key phone system, when the user wants to receive a call elsewhere due to a work reason or other work, or to receive an urgent call at home after work, the user presses the call forward / release key of the key phone. If you need to change the call location to where you want to answer the call, and you no longer need to release the call forwarding function, press the call forward / release key again on the key phone to release it.

As described above, there is an inconvenience in that the user must directly set / cancel the call forwarding function at the corresponding time. In addition, when the user forgets to set the call forwarding function and release the call forwarding, if the call is not released, the incoming call is switched to the wrong place, there is a problem that the user does not receive a call.

Accordingly, an object of the present invention is to provide an apparatus and method for reserved call forwarding in a key phone system that automatically switches the setting and release of a call forwarding function at a time desired by a user.

1 is a block diagram of a typical key phone system.

Figure 2 is a block diagram of a reserved call forwarding device in a key phone system according to an embodiment of the present invention.

3A and 3B are flowcharts illustrating a call forwarding method in a key phone system according to an exemplary embodiment of the present invention.

Figure 4 is an execution program diagram of a call forwarding method in the key phone system 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. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different 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.

1 is a block diagram of a general key phone system.

Referring to FIG. 1, the central processing unit 20 executes a set program to control a call switch, and controls various services and functions according to the present invention. The ROM 30 includes a control program and initial service data for performing calls and various functions. The RAM 40 has a program and a volatile data processing area, and is used as a working memory of the CPU 20. The switching unit 10 switches various tones and voice data under the control of the central processing unit 20. The general subscriber circuit 50 performs interfacing between a plurality of general telephones and devices. The trunk line circuit 60 is controlled by the central processing unit 20 and forms a trunk line loop by scouring the trunk line. The key phone subscriber circuit 70 performs an interface between a plurality of key phone telephones and a device. The general subscriber circuit 50 and the keypad subscriber circuit 70 are internal subscriber circuits. The tone generator 80 is controlled by the central processing unit 20 and generates various tone signals and supplies them to the switch circuit 10. Also, an incoming signal received through the trunk line is interfaced. The ring generator 90 outputs a ring signal in the form of a square wave to the general subscriber circuit. The DTMF receiver 100 analyzes the DTMF signal generated from the general subscriber circuit. Meanwhile, the analyzed digit data is output to the CPU 20. The DTMF transmitter 110 outputs a DTMF signal to the switching circuit under the control of the central processing unit 20.

2 is a block diagram of a reservation call forwarding device in a key phone system according to an embodiment of the present invention.

2, the computer 300 typically includes a central processing unit, a timer, a memory, a monitor, a keyboard, and a connection unit. The CPU 301 controls the overall operation of the computer by a program. The timer 305 sets a plurality of times used for the computer 300 under the control of the CPU 301. The memory 306 stores an operating program and an application program such as a telephone application programming interface (hereinafter referred to as TAPI). The TAPI application is a utility that performs a number of functions related to a telephone such as a call forwarding reservation function. The keyboard 303 is composed of a plurality of keys for inputting Korean, English, and numbers, and function keys for performing special functions. The monitor 304 displays data input by the keyboard 303 and various graphics, texts, and moving images generated by program execution. The connection unit 302 outputs data generated by the program to the outside and may be implemented as a general serial port.

The interface unit 200 is a computer telephony module (CTM), which receives data and signals output from the connection unit 302 of the computer 300 through an RS232C cable, and converts the input data and signals into a telephone. Line matching is performed for transmission over line (2B + D). It also interfaces the voice signal and data transmitted from the key phone telephone 201.

The key phone system 100 receives data and signals line-matched by the interface unit 200 through a digital line interface (hereinafter, referred to as DLI). The incoming call forwarding data is stored in the memory of the key phone system and is set to the call forwarding mode by the call forwarding signal. The DLI is included in the key phone subscriber circuit 70.

3 is a flowchart illustrating a method of setting a call forwarding in a key phone system according to an exemplary embodiment of the present invention.

Hereinafter, referring to FIGS. 1, 2, and 3, a method of setting a reserved call forwarding method will be described. First, in step 501, the CPU 301 of the computer 300 checks whether a TAPI application program has been executed. When the TAPI application is executed, the initial screen is displayed on the monitor 304. The initial screen includes a plurality of menus such as call forwarding reservation. The central processing unit 301 checks in step 502 whether the displayed call forwarding reservation has been selected by the keyboard 303. When the call forwarding reservation is selected, the CPU 301 detects the call forwarding reservation signal and sets the call forwarding reservation mode to the monitor 304 in step 503. After displaying the call forwarding reservation screen, in step 504, the central processing unit 301 requests input of a target phone number and a target phone number to be forwarded. After step 504, in step 505, the CPU checks whether the target phone number and the target phone number are input. The target telephone number is a user telephone number, and the target telephone number is a telephone number to be forwarded. When the target phone number and the destination phone number are input, the central processing unit 301 stores the memory 306 of the computer 300 in step 506. After step 506, in step 507, the central processing unit 301 requests to enter the call forward reservation start / release time. After the call forwarding reservation start / release time input request, the central processing unit 301 checks whether the call forwarding reservation start / release time is input in step 508. When the call forwarding reservation start / release time is input, it is stored in the memory 306 of the computer 300 in step 509. After step 509, in step 510, the central processing unit 301 checks whether a call forwarding reservation is to be set with the stored call forwarding data. If the call forwarding data is set, the CPU 301 checks the timer 305 of the computer 300 to determine whether the current time is the call forwarding start time (511). If the current time is the call forwarding start time set in the call forwarding data, the central processing unit 301 outputs the call forwarding start signal and the call forwarding data on the RS232C serial port connection unit 302 in step 312. The call forwarding data and the call forwarding start signal are input to the interface unit 200, and are matched with the telephone line 2B + D at the interface unit 200 and output.

The line-matched call forwarding start signal and the call forwarding data are input to the DLI 71 of the key phone system 100. In step 513, the central processing unit 20 of the key phone system 100 stores the call forwarding data in a memory, detects a call forwarding start signal input to the DLI 71, and sets the call forwarding mode in step 514. From this time, the central processing unit 20 of the key phone system 100 checks whether the DTMF (Dual Tone Multi Frequency) signal detected until the call forwarding release signal is the same as the telephone number of the call forwarding data.

After step 512, the central processing unit 301 of the computer 300 continuously checks the timer 305 to determine whether the current time is the incoming call release time. If the current time of the timer 305 is the incoming call release time, in step 515 the central processing unit outputs a call forward release signal through the serial port RS232C. The call forward release signal is matched to the telephone line by the interface unit 200 and output as the call forward start signal.

The DLI 71 of the key phone system 100 receives a call forwarding cancel signal output from the interface unit 200. The central processing unit 20 of the key phone system 100 detects the call forwarding release signal and releases the call forwarding.

4 is a flowchart illustrating a call forwarding process in the key phone system when the call forwarding reservation is set in the key phone system according to an exemplary embodiment of the present invention.

First, in step 401, the CPU 20 checks whether a DTMF signal is detected from the DTMF receiver 92. When the DTMF signal is detected in step 401, the central processing unit 20 checks whether the system is in the call forwarding mode. In step 402, the phone number detected in step 403 is the target switching number stored in the memory 30. Check if it is equal to. If the detected telephone number is the same as the target telephone number, the target telephone number is read from the call forwarding data stored in the memory 30 in step 404. After step 404, in step 405, the central processing unit 20 controls the DTMF transmitter 94 to generate a DTMF signal for the target telephone number and output it through the trunk line subscriber circuit 60. If the telephone number to be forwarded is the extension telephone number, the key phone subscriber circuit 70 or the general subscriber circuit 50 is controlled to interface with the target telephone number.

As described above, the present invention has the advantage that the user can receive the incoming call from the desired location in the desired time zone, and also because the call forwarding can be used over multiple time zones, even if you move the position several times, the call from the desired location There is an advantage to receive.

Claims (5)

In a call forwarding device in a key phone system, Set the call forwarding start / release time and the target phone number and the destination phone number, which are the call forwarding data, and output the call forwarding start signal and the call forwarding data when the call forwarding start time arrives; A computer that outputs a switch off signal, A communication terminal having the target phone number; The call forwarding start signal and the call forwarding data output from the computer are input to the digital line interface through a predetermined relay, and the call forwarding setting is set, and the call forwarding cancel signal output from the computer is transferred to the digital line interface via a predetermined relay. A key phone system that receives incoming calls and releases calls; And an interface unit connected between the computer, the subscriber subscriber unit, and the key phone system, and configured to relay a signal or data inputted and outputted to a telephone line and relayed thereto. The method of claim 1, wherein the key phone system An extension subscriber unit receiving the incoming call forwarding start signal and the incoming call forwarding data; A dual complex frequency receiver which detects a dual complex frequency signal under predetermined control, A memory for storing the detected call forwarding data under predetermined control; A dual complex frequency generator for generating a double complex frequency signal for a target telephone number in the call forwarding data under predetermined control; Detects a call forwarding start signal inputted to the extension subscriber unit and sets a call forwarding mode, and compares the phone number detected by the dual frequency receiver with the target phone number and reads a target phone number from the memory if the same; A call forwarding device in a key phone system, characterized in that it consists of a central processing unit for generating a dual complex frequency signal for a target telephone number by controlling a dual complex frequency generator. In a reserved call forwarding method in a key phone system having a memory for storing call forwarding data, A first step of checking whether a complex frequency code is detected from the complex frequency code receiver; A second step of checking whether the system is in the call forwarding mode when the complex frequency code is received after performing the first step; A third step of checking whether the detected phone number is the same as the target phone number of the call forwarding data after performing the second step; After performing the third process, if the detected telephone number is the same as the target telephone number, a fourth process of reading a target telephone number and generating a complex frequency code signal corresponding to the target telephone number is performed. How to call forwarding in keyphone system. The method of claim 3, And in the fourth process, if the target telephone number is an extension telephone, having a step of interfacing through a general subscriber circuit or a key-phone subscriber circuit. The method of claim 3, And a fifth process of connecting to the detected telephone number if the telephone number detected in the third process is different from the target telephone number.