KR19980021371A - Apparatus and method for displaying caller information of wireless telephone - Google Patents

Abstract

end. TECHNICAL FIELD This invention relates to a radiotelephone, and more particularly, to a terminal apparatus and a method for receiving and displaying the calling party identification information transmitted from an exchange.

I. The technical problem to be solved by the present invention: In the conventional wireless telephone, there is no function to inform the caller ID (caller ID) to check the other party when the ring is received from whom the called party using the telephone There was a problem that could not be confirmed. Therefore, the above problem is solved.

All. Summary of the Invention A terminal apparatus capable of receiving the call signal from the calling telephone and transmitting the calling party identification information before sending the ring to the called party, receiving the call signal, and displaying the caller identification information externally. And methods.

la. Important uses of the invention

Apparatus and method for displaying caller information of wireless telephone.

Description

Apparatus and method for displaying caller information of wireless telephone

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless telephone, and more particularly, to a terminal apparatus and a method for receiving and displaying the calling party identification information transmitted from an exchange.

As communication technology develops today, various service functions of communication devices are required, and in particular, in the case of wireless telephones used in offices or homes, various functions are added for the purpose of user convenience. Among them, in order to protect the privacy of users, a function was required to receive and select the caller's information in advance when a call is received from the outside.

Accordingly, an object of the present invention is a radiotelephone that receives a call signal from a caller's telephone and receives it when the caller's identification information is sent before sending a ring to the called party and displays the caller identification information externally. It is to provide a terminal device and method.

The present invention for achieving the above object is a wireless telephone to receive and display the caller information transmitted from the exchange, the loop voltage of the two lines connected to the wireless telephone for the exchange to send the caller information to the corresponding wireless telephone A loop voltage detector for detecting when the state is temporarily changed, a central processing unit for detecting a change in the loop voltage state from the loop voltage detector and generating a control signal for displaying caller information transmitted from the exchange; A DTMF receiver which is controlled by a control signal of the central processor and receives caller information transmitted from the exchange, and an external display which displays caller information controlled by a control signal of the central processor and displayed through the DTMF receiver. It is characterized by.

1 is a block diagram of a conventional polarity inverting exchanger of the related art.

Figure 2 is a block diagram of a conventional line switching type exchange.

3 is a block diagram of a wireless telephone according to an embodiment of the present invention.

4 is a flowchart illustrating receiving and displaying caller information transmitted from an exchange according to an embodiment of the present invention.

5 is a flowchart illustrating receiving and displaying caller identification information at a called party according to an embodiment of the present invention.

Hereinafter will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a polarity inversion exchanger applied to the present invention.

First, the loop voltage supply unit 120 supplies a loop voltage of + 48V to the tip line of the cordless telephone and 0V to the ring line. The polarity inversion switch 130 reverses the loop voltage output from the loop voltage supply unit 120 to 0V on the tip line and -48V on the ring line when the caller's information is to be transmitted to the called party. Supply the voltage. The tone generator 110 converts the caller's information into a DTMF signal and transmits it to the called party.

Figure 2 is a block diagram of a line transfer type exchanger applied to the present invention,

First, the loop voltage supply unit 220 supplies a loop voltage of + 48V to the tip line of the cordless telephone and 0V to the ring line. The line transfer switch 230 switches the tip line to the loop voltage output from the loop voltage supply unit 220 when the caller's information is to be transmitted to the called party. The tone generator 210 converts the caller's information into a DTMF signal and transmits it to the called party.

3 is a block diagram of a radiotelephone fixing device according to an embodiment of the present invention;

The central processing unit 310 controls the overall operation of the wireless telephone. The central processing unit 310 is a one-chip microprocessor, and includes a ROM for storing a program and a RAM for temporarily storing data generated during program execution. The memory 326 may use an EEPROM. The ring detection unit 322 is connected to the telephone line, and detects a ring signal input to the telephone line in the horn-hook state and requests an incoming call state to the central processing unit 310. The hook relay 314 includes a hook switch, and performs a function of connecting and blocking a telephone line and a call path of a fixing device by a control signal of the central processing unit 310. The call circuit unit 312 is a voice circuit and processes various tone signals and voice signals connected to and connected to a telephone line. The RF unit 316 performs a function of communicating various types of data and call voice signals for controlling the communication link with the portable device under the control of the central processing unit 310. The DTMF generating unit 320 is connected between the central processing unit 310 and the call circuit unit 312 and converts the digital data output from the central processing unit 310 into a DTMF signal and outputs the DTMF signal to the call circuit unit 312. . The DTMF receiver 318 outputs various DTMF signals output from the call circuit unit 312 to the central processing unit 310. The polarity inversion detector 330 detects the polarity inversion in the case of the exchanger connected to the tip and the ring line connected to the exchanger to change the loop voltages of the two lines into the polarity inversion. The line open detector 328 detects the line transfer in the case of an exchanger connected to a tip and ring line connected to the exchanger to vary the loop voltages of the two lines as the line transfer. Finally, the external display unit 324 displays caller information transmitted under the control of the central processing unit 310.

4 is a flowchart illustrating an exchange for transmitting caller identification information to a called party according to an exemplary embodiment of the present invention, when the call signal is received from the calling party, polarity inversion and line transfer are performed to send the caller identification information to the called party; Transmitting a start signal, transmitting a caller identification information transmission start signal, transmitting a caller identification information to a called party, and then transmitting a ring signal.

5 is a flowchart of receiving and displaying caller identification information at a called party according to an embodiment of the present invention; receiving and storing caller identification information transmitted when a caller identification information transmission start signal is received from an exchange; After receiving and storing the caller identification information, when the ring signal is received from the switch, the caller identification information is displayed on an external display unit.

Hereinafter, a flowchart of FIGS. 4-5 will be described in detail with reference to the block diagram of FIGS. 1-3 attached to the present invention.

First, the operation of the polarity inversion switch of FIG. 1 will be described with reference to the flowchart of FIG. 4. When the call signal is received from the caller in step 410, the control unit of the exchanger is located at the rear end of the loop voltage supply unit 120 in step 420. Control the switch 130 to identify the caller by inverting the loop voltage supplied to two lines (tips and rings) connected to the called party's cordless phone, that is, + 48V at the tip line and 0V at the ring line. Supply information transmission start signal. At this time, the polarity reversed loop voltage is 0V at the tip line and -48V at the ring line. Then, in step 430, the control unit of the exchange controls the tone generating unit 110 to transmit the calling party identification information to the called party's wireless telephone. At this time, the outgoing caller identification information transmits a caller's telephone number, name, type of call, time, and the like as shown in Table 1 below.

LINE DATA TIME PHONE NUMBER NAME #One JUN, 05 11:15 PM 321-7654 LEE JUNG SUNG # 3 OCT, 15 10:03 AM 460-2833 PARK SU BANG # 9 SET, 12 09:10 PM 524-3333 KIM MIN HO

Then, in step 440, the control unit of the exchange sends a ring signal to the called party to form a call loop so that the call can be carried out when the called party hooks off.

In addition, the line switch type switch as shown in FIG. 2 is also executed by the same control method as described above, but the caller identification information transmission start signal is not transmitted by changing the loop voltage with polarity inversion as in the polarity inversion switch of FIG. A line transfer switch 230 for switching a tip line connected to a telephone is provided to transmit the caller identification information transmission start signal by varying the loop voltage.

Therefore, a method of receiving and displaying caller identification information transmitted using the two types of exchanges as described above at the called party will be described with reference to the flowchart of FIG. 5. 5 is a flowchart illustrating receiving and displaying caller identification information at a called side according to an embodiment of the present invention. First, in step 510, the central processing unit 310 of the called side wireless telephone is connected to the switch. The polarity inversion detector 330 and the line open detector 328 connected to the line detect a change state of the loop voltage, that is, a caller identification information transmission start signal. In this case, when the caller identification information transmission start signal is detected, the central processing unit 310 receives the caller identification information through the DTMF receiver in step 520. Thereafter, in step 530, the central processing unit 310 stores the received caller identification information in an EEPROM. Then, the central processing unit 310 detects whether a ring signal is received from the exchange. In this case, when the ring signal is detected, the external display unit 324 is controlled in step 550 to display the caller identification information.

As described above, the present invention provides a terminal apparatus and a method for receiving a call signal from a caller's telephone and receiving the caller's identification information before sending the ring to the called party and displaying the caller identification information to the outside. By providing a user, the user can conveniently receive the caller when the ring is received.

Claims (5)

In a wireless telephone that receives and displays caller information transmitted from an exchange, The loop voltage detector for detecting a caller information transmission start signal sent from the exchange; A central processing unit for detecting a change in the loop voltage state from the loop voltage detector and generating a control signal for displaying caller information transmitted from the exchange; A DTMF receiver which is controlled by a control signal of the central processing unit and receives caller information sent from the switchboard; And an external display unit which is controlled by a control signal of the central processing unit and displays caller information received through a DTMF receiver. The method of claim 1, wherein the loop voltage detector, A polarity inversion detector for detecting a polarity inversion of a loop voltage of two lines of tip / ring connected between the switch and the radiotelephone; And a line open detector for detecting tip line switching between two tip / ring lines connected between the switch and the cordless telephone. A method for receiving and displaying caller information transmitted from an exchange in a wireless telephone, A detection process of detecting a caller identification information transmission start signal sent from the exchange; A storing step of receiving and storing the caller identification information transmitted when the caller identification information transmission start signal is detected; And receiving and storing the caller identification information and displaying the caller identification information on an external display unit when a ring signal is received from the switch. The method of claim 3, wherein the caller identification information transmission start signal is detected. And detecting the inversion of the loop voltage of the tip / ring line connected between the switch and the cordless telephone. The method of claim 3, wherein the caller identification information transmission start signal is detected. And detecting the tip line of the two tip / ring lines connected between the switch and the cordless telephone.