KR0168008B1 - Clock service using dtmf transmitter in key-phone system - Google Patents

Abstract

In order to notify the time signal using the DTMF transmitter inside the system, the key phone system checks whether it is time for the time signal service and provides the time signal service to the key phone phone, which is a dedicated terminal. Check the busy of the phone, and the speaker phone to drive the time signal service when the phone is not busy, and to use the switching channel, if the call is busy, the DTMF transmitter is driven after the procedure and connected to the phone In addition, the key phone telephone and the DTMF transmitter are connected to switch the DTMF signal after the switching.

Description

Time signal service method using DMP transmitter in key phone system

1 is a view for explaining an embodiment of the present invention.

2 is a flow chart in accordance with the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time signal service method in a key phone system, and more particularly to a method of informing a time signal using a DTMF transmitter in a system of time information for servicing a key phone telephone which is a dedicated terminal in the key phone system. It is about.

In general, the DTMF transmitter is used to transmit a dial number to a trunk line, and is also used for a digit transmission service to control an additional device connected to a general telephone connection port.

In the conventional key phone system, time information is continuously transmitted to the key phone, and the key phone can be visually confirmed through the display device (LCD). FIG. 1 is a key phone system block diagram.

A ROM (Read Only Memory) 20 in which the program and initial service data for controlling call switching by accessing a preset program and performing various services and various functions according to the embodiment of the present invention are embedded;

A random access memory (RAM) 30 having a program and a volatile data processing area and used as a working memory of the central processing unit 10;

An extension subscriber circuit 40 for supplying a call current in a voice band to the extension subscriber's telephone and for interfacing between the extension telephone and the device;

A network 50 for switching various tones and voice data under the control of the CPU 10;

A tone generator 60 for generating and providing the various tone signals to the network 50 in response to the control of the CPU 10;

A ring generator 70 for supplying a square wave shaped ring signal to the network 50 in response to the control of the CPU 10;

A DTMF receiver 80 for analyzing the MFC (Multi Frequency Code) generated from the subscriber of the extension subscriber circuit 40 and applying the corresponding digit data to the CPU 10;

A DTMF transmitter 90 for outputting an MFC signal under the control of the central processing unit 10,

A trunk line circuit 95 for cabling a trunk line in response to the control of the central processing unit 10 to form a trunk line loop, and interfacing a signal coming from the trunk line;

And a key phone subscriber circuit 22 for interfacing key phone subscribers.

As an extension subscriber in the key phone system, a general telephone through the subscriber subscriber circuit 40 and a key phone telephone, which is a dedicated terminal device, can be connected.In particular, in the case of a key phone telephone, data for the main device (key phone system main device) and a given time (for example, every 100 msec) It works by sending and receiving. Among the transmission and reception data, there is data showing the clock function, and the display of this time is performed through the display device (LCD).

When the phone is in the free state, the time is usually displayed, and additional time, such as an alarm, may be used.

Conventional key phone system, as shown in the time information, unlike the usual clock does not have a time signal function that is serviced every hour or every 30 minutes. If there is no time signal, consciously check the display device (LCD) to check the time and use the additional alarm function to learn more important time information.

Therefore, an object of the present invention is to show a time signal service method that implements the time signal using the output signal of the DTMF transmitter mounted in the key phone system, and to service the time signal function without the need for additional hardware It is to provide a way to.

2 is a flow chart according to the present invention,

A first step of checking whether it is time for the key phone system to provide time signal service, and confirming that the key phone is busy during the time signal service;

A second process of driving the speakerphone when the cellular phone to be used for the time signal service is not busy and using a switching passage that is busy during the call;

A third process of driving the DTMF transmitter after the second process and connecting it to a key-phone telephone;

The fourth step is to connect the key-phone telephone and the DTMF transmitter of the third step to separate the switching after transmitting the DTMF signal.

Therefore, a specific embodiment of the present invention will be described in detail with reference to FIGS. 1 to 2.

The present invention is to provide to subscribers by using the output of the DTP transmitter in the system at each time point to inform the time signal in addition to the existing time information service that is simply displayed through the display device (LCD) DTMF transmitter ( 90, when it is time to provide the time signal at the request of the central processing unit 10, the keychain subscriber circuit 22 serves to service the output path to the keyphone subscriber.

When the DTMF transmitter 90 is used, it cannot be used again for other services, so services are separated and provided according to time. In other words, the DTMF transmitter 90 cannot be used at the same time.

Therefore, when the central processing unit 10 reaches the time signal, the key phone system transmits the signal using the DTMF transmitter 90. In step 100, the central processing unit 10 of the key phone system should perform the time service. Check the time. If it is time to perform the time signal service in step (100), first check the status (free, busy) of the extension subscriber to be serviced in step (300). In step 300, using the network 50 used by the extension subscriber, the DTMF transmitter 90 is driven in step 500 to connect with the key subscriber through the key subscriber subscriber circuit 22 to transmit DTMF signals. In the free state, the signal is transmitted after the speakerphone is operated in the process (400).

When the DTMF transmission is completed, the DTMF transmitter 90 and the subscriber subscriber circuit 22 are separated from the network 50 by the control of the central processing unit 10 in step 600.

As described above, in the present invention, it is possible to implement the time signal using the output signal of the DTMF transmitter mounted in the key phone system, and to provide the time signal function without the need for additional hardware. There is this.

Claims (3)

In the time signal service of a key phone system having a DTMF transmitter, the time signal is transmitted to subscribers using the output signal of the DTMF transmitter. Time signal service method. The method of claim 1, wherein the DTMF time signal transmission output signal is configured to send out the same number of times as the service time of the time signal. In a key phone system having a DTMF transmitter, a network 50, and a key subscriber circuit, a first step of checking whether the key phone system is time to perform time signal service and checking the busy time of the key phone telephone to service time signal; In the first process, the second phone to drive the spur phone when the key phone for the time signal service is not busy and to use the switching channel during the call when the phone is busy, and the DTMF transmitter is driven after the second process. And a fourth step of connecting the key phone and the DTMF transmitter of the third step to disconnect the switching after transmitting the DTMF signal. How to service.