KR900005159B1 - Automatic dialing method - Google Patents

Abstract

The automatic dialing method for dialing the telephone number automatically after certain time if the conterpart line is busy comprises steps; a process shifting to a timer dial mode when the timer mode signal is input, a memorizing process storing the time and telephone number data into the memory, a time comparing process comparing the timer time to the stored data, and a dialling process connecting to the speaker phone circit and dialling the stored telephone number when the reserved time is on.

Description

Automatic Time Dialing Method

1 is a circuit diagram of a telephone for carrying out the present invention.

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

* Explanation of symbols for main parts of the drawings

10: ringer circuit 20: key input circuit

30: microprocessor 40: dial pulse circuit

50: call circuit 60: speakerphone circuit

The present invention relates to a time-scheduling automatic dialing method in which a telephone is made by automatically dialing a telephone number of a remote side at a desired time.

The state known by dialing the other party's telephone number with a conventional telephone is a free state where the subscriber of the other party can make a call by an operation performed by the exchange, or a busy state indicating a call state with a third party ( By receiving Ring Back Tone and Busy Tone indicating whether the party is busy, it was possible to determine whether the other party was in a reception state or a reception state (Basy) state.

Therefore, after the user dials a busy tone indicating that the other party is currently busy after dialing to call the other party using a conventional telephone operating as described above, the user waits for a predetermined time and then hangs off-hook. The only way was to (OFF-HOOK) to check the dialing tone and then redial the call.

In the conventional telephone, the dialing is performed to talk to the other party, and when the other party is busy, the user must perform manual redialing by switching on and off the hook switch to execute the call. There was no. Therefore, when the other party is continuously or absent, the user cannot perform the user's work smoothly because the user must continuously repeat the telephone dialing at predetermined time intervals to execute the call.

Accordingly, it is an object of the present invention to save a call reservation time and a phone number of a counterpart in a predetermined memory area when the counterpart is busy or the counterpart is absent when the counterpart is busy. The present invention provides a method for automatically dialing a time reservation so that a call can be automatically sent by a dial signal.

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

FIG. 1 is a circuit diagram of a speaker phone for carrying out the present invention. The ring signal input from the telephone lines L1 and L2 is detected and the ring signal is audible through the speaker SP. A key input circuit 20 for generating a function signal and a reservation signal of a dial digit and a speakerphone by a key press signal, and the key input circuit 20 The signal is analyzed by a built-in program, and the microprocessor (hereinafter referred to as MPU) 30, which outputs speakerphone function signals and dial transmission signals, and a handset (not shown) are held and released. A hook switch (HS1) for hooking a trunk line on / off and a hook switch (HS1) connected in parallel with each other to turn on / off-hook the trunk line by turning on / off a speakerphone function signal output from the MPU (30). Output from the log switch ASW1 and the MPU 30 Is connected to a dial pulse sending circuit 40 for sending a pulse signal to a trunk line by a pulse dial sending control signal, and a handset transmitter and a telephone line when a hand cell is picked up to form a DTMF ( Dual Tone Multi Frequency) The call circuit 50 generates and outputs a multi-frequency code according to the dial transmission control signal, and the output of the speakerphone function signal of the MPU 30 to the call of the microphone MIC and the speaker SPK. It consists of a speaker phone circuit (Speaker Phone) circuit 60 for transmitting a multi-frequency code of the call circuit 50 at the same time. Reference numeral L1 and L2 are telephone line lines, HS2 is a hook switch interlocked with the hook switch HS1, and ASW2 is an analog switch operated by the opposite logic of the control logic of the analog switch ASW1. The key input circuit 20 has a reserved dial mode key, which is a time reservation key, a den key (0-9 and *, # keys) for digits, a speaker phone key, and the like.

2 is a flow chart of time reservation automatic dialing according to the present invention, after entering a reservation dialing mode by input of a reservation dial mode key, the reservation time and reservation dial inputted are saved in a predetermined memory and searched for a reserved time. When the reservation time arrives, the speakerphone function signal is output to form a trunk line loop, and then the reserved dialing digit is transmitted.

An operation example of the present invention will be described below with reference to the configuration of FIG. 1 and the flowchart of FIG. 2 described above.

When the ring signal of 80Vrms 20HZ output from the exchange through the trunk line L1 (L2) is input through the hook switch HS1 and the analog switch ASW2, it is detected by the ringer circuit 10 and output as an audible sound. In normal (on-hook) hook switch HS1 is "off", HS2 is "on", analog switch ASW1 is "off" and ASW2 is "on". For example, the hook switch HS1 is "on", and the hook switch HS2, which is interlocked with the hook switch HS1, is "off", the ring signal is cut off, and the dial current is dialed through the hook switch HS1 that is "on". It is input to the pulse circuit 40, the call circuit 50 and the speakerphone circuit 60.

Therefore, the voice band signal carried on the talk current is audible to the handset receiver through a circuit in the talk circuit 50, and the voice signal transmitted from the talker of the handset is superimposed on the talk current by the operation of the talk circuit 50. It is sent out to lines L1 and L2.

As described above, if the ring signal arrives at the ringer circuit 10 through the hook switch HS2 and the analog switch ASW2, the user presses the speakerphone key of the key input circuit 20 without lifting the handset. The MPU 30 analyzes this and outputs the speakerphone function signal of the "high" state to the output terminals SKS and SK to enable the speakerphone functions of the analog switches ASW1-ASW2 and the speakerphone circuit 60. (SH). At this time, the analog switch ASW2 which inputs the signal of the "high" state is "off" to cut off the ring signal, and the analog switch ASW1 is "on" and the call is input to the telephone line L1 (L2). The current is output to the dial pulse circuit 40, the call circuit 50 and the speakerphone circuit 60.

Therefore, the voice signal carried in the call current input to the telephone lines L1 and L2 is output as an audible sound through the speaker SPK by the call path in the speakerphone circuit 60, and the voice signal input to the microphone MIC is output. Superimposed on the talk current is output through the trunk line (L1) (L2). The speakerphone circuit 60 as described above is composed of a single chip (one chip) and its peripheral elements can be used as it is known circuits as it is.

On the other hand, when the user lifts the handset to call the remote side, the hook switch HS2 is turned off and the hook switch HS1 is "on" so that the current input through the trunk line L1 and L2 is dial pulse. The circuit 40 is input to the call circuit 50 and the speakerphone 60. At this time, since the speakerphone circuit 60 is in a disabled state in which the speakerphone function signal is not input to the line 12, the signal input through the telephone lines L1 and L2 is a handset connected to the call circuit 50. Will only be audible to the receiver.

Therefore, if the signal inputted to the telephone lines L1 and L2 is a signal of a voice band (for example, a dial tone provided by an exchange or a voice signal by voice transmission of the other party), the dial tone The audio signal is only audible to the handset's handset.

On the other hand, when the user presses the speakerphone key of the key input circuit 20 without lifting the handset, the MPU 30 determines this and outputs the speakerphone function signal "high" to the output terminals SKS and SK and outputs the line L1. And (L2).

Therefore, the analog switch ASW1 is turned "on" (ASW2) is "off" so that the call current input to the trunk line L1 and L2 is input to the speakerphone circuit 60, and the speakerphone circuit 60 is the MPU. Enabled by the speakerphone function signal " high " output from 30 to form a loop of talk current and output a dial tone through the speaker SPK.

When the user presses the dial digit key of the key input circuit 20 and dials after listening to the dial tone through the handset of the handset connected to the call circuit 50 or the speaker SPK of the speakerphone 60 as described above, the MPU 30 To transmit the pulse transmission control data or multi-frequency code (MFC) for transmitting the pulse signal according to the mode selection of the pulse / tone selector switch (not shown) by judging the input dial digits Multi-frequency code control data is output through the output terminal (PU) or (DT). (The pulse / tone selection switch is set by the user according to the dial mode of the exchanger.

Therefore, when the trunk line loop is formed and the MPU 30 outputs pulse transmission data to the dial pulse circuit 40 through the terminal PU in a state in which a ring tone is provided from the exchange, the dial pulse circuit 40 outputs pulse transmission control data. The pulse signal corresponding to the signal is sent to the telephone lines L1 and L2. If the selection mode of the pulse / tone selection switch is the tone mode, the MPU 30 outputs the multi-frequency code (MFC) control data to the call circuit 50 through the terminal DT. The multi-frequency code control data is input as control data of a dual tone multi frequency transmitter (DTMF-SENDER) in the call circuit 50. Therefore, in the call circuit 50, a multi-frequency code is generated and input to the speakerphone 60. As a result, the multi-frequency code is transmitted to the telephone lines L1 and L2 through the call loop of the speakerphone circuit 60. At the end of the dialing, you will hear the voiceband signal from the exchange. In this case, the signal of the voice band provided from the exchange after the dialing is terminated typically provides a signal of the other party's state, for example, ring back tone or busy tone. The ringback tone is provided when the other party is in an idle state, and the busy tone is provided from the exchange when the other party is busy.

If the telephone number of the other party is dialed as described above and the user hears the busy tone provided from the exchange continuously, the user recognizes that the other party dialed by him is busy. At this time, if the user executes a call at a desired time (a desired time for a call with the counterpart) and the user presses the reserved dialing mode key of the key input circuit 20, this is the key input port (KIN) of the MPU 30. Is entered.

Meanwhile, the MPU 30 performs the automatic reservation dialing routine of FIG. 2 at a predetermined period. The MPU 30 performing the routine of FIG. 2 performs the key input port KIN in FIG. Scan and determine whether a reserved dialing mode key is input.

Accordingly, when the user presses the reserved dialing mode key in the key input circuit 20, the MPU 30 determines that the reserved dialing mode key is input in step 2-0 of FIG. 2, and thus reserves time as shown in FIG. 2-1. Enter the dialing mode. If the user presses the reservation time dialing digit using the key of the key input circuit 20 after pressing the reservation mode dialing key, this is input to the key input port KIN of the MPU 30 in FIG. 2-2. do.

In the above, the reservation time refers to the hour data and the minute data or minute data as the time for making a phone call, which is input by using the time key and ten key (0-9 key) in the key input circuit 20. Let's do it. The reserved dialing key refers to the other party's dialing number (telephone number), which is also input using the ten-key (keys 0-9) of the key input circuit 30. At this time, the MPU 30 saves the reservation time and the reservation dialing digit input in the process 2-2 to the predetermined memory area set in the MPU 30 in the process of FIG. At this time, the input of the time reservation and the reservation dial digit by the reservation dial mode is saved in the memory in the MPU 30 operated as shown in FIG. 2 regardless of the on / off hooks of the telephone lines L1 and L2. As described above, the MPU 30 having saved the reservation time and the dialing digit performs the on-hook routine of FIGS. 2-4.

The on-hook routine of FIGs. 2-4 detects the on / off hook state of the telephone line L1 (L2) and is off-hook by the speakerphone key in the case of off-hook. Is a subroutine that searches for an off-hook. At this time, the detection of the on / off-hook is to detect the voltage change of the off-hook detector <telephone line (L1) (L2). A supervisor that uses the supervisor to detect the on / off-hook of the subscriber at the exchange can be used. The MPU 30 inputs and executes an output of &quot; not shown &quot; which can be detected using a hook sensing terminal in the pulse dialer chip circuit in the dial pulse circuit 40.

If the current phone state is on-hook, the MPU 30 detects whether the reservation time is made by comparing the current time data of the internal real time clock (RTC) and the reservation time in the process of FIGS. 2-5.

If it is off-hook in the subroutine of steps 2-4, the MPU 30 searches whether the terminals SKS and SK are outputting "high" speakerphone function signals.

If the speakerphone function signal is output to the terminals SKS and SK, the MPU 30 determines that it is off-hook by the speakerphone, and the terminals SKS and SK output the speaker function signals of logic "low". The output is " off " of the analog switch ASW1, and the speakerphone circuit 60 is disabled to be on-hook in the subroutine of steps 2-4.

When the “off-hook” is detected while the speakerphone function signal is not output during the searching process, the MPU 30 determines that the handset is off-hook by the UP of the handset, and when the handset is down. Repeat steps 2-4. In this case, when the user lowers the handset on-hook, the above-described off-hook detector provides the on-hook status signal to the MPU 30, and the MPU 30 receives the on-hook status signal from FIG. Jump to -5.

Therefore, when the user enters the reserved dial mode key, the reserved time, and the reserved dial digit as described above in the off-hook state when the user lifts the handset, the user must put down the handset on-hook to automatically dial at the scheduled time. Will be

The MPU 30 performing the on-hook in step 2-4 is a reservation time by comparing the time of the RTC inside the MPU 30 with the reservation time input in step 2-2 in step 2-5 ( Whether the current time has reached the reservation time).

When it is determined that the reservation time is reached in the time search in step 2-5, the MPU 30 outputs a logic "high" speakerphone function signal to the output terminal SKS and SK in step 2-6. .

Therefore, the analog switches ASW1-ASW2 are turned on and off, respectively, and thus, the trunk line current input to the telephone lines L1 and L2 is dial pulse circuit 40, call circuit 50, and speaker phone circuit 60. Is entered. At this time, the speakerphone circuit 60 is enabled by inputting the "high" speakerphone function signal output from the output terminal SK of the MPU 30 to the terminal SH.

Accordingly, the speakerphone circuit 60 forms a trunk line current loop and at the same time becomes a speaker (SPK) by using a dial tone provided from the exchanger to become an off-hook (OFF-HOOK) by the second to sixth processes.

As described above, the MPU 30 outputting the speakerphone function signal reads the dial digit stored in the internal memory in steps 2-7 of FIG. 2 and outputs the pulse transmission control data output terminal PU or multiplexes according to the pulse / tone mode selection. Output to the frequency transmission control data output terminal (DT).

For example, when the pulse / tone mode selection is the pulse mode, the MPU 30 inputs the dial digit to the dial pulse circuit 40 through the pulse transmission control data output terminal PU. If the pulse / tone mode selection is the tone mode, the MPU 30 transmits the dial digits read in steps 2-7 through the multi-frequency transmission control data output terminal DT to the multi-frequency transmitter in the call circuit 50. To enter. At this time, the data read from the internal memory in step 2-7 is the phone number of the counterpart input by the user as the dialing digit stored in the memory in step 2-3 described above.

On the other hand, the dial pulse circuit 40 which inputs the dial digit through the pulse transmission control data output terminal PU of the MPU 30 generates the dial pulse corresponding to the dial digit and switches the " on " Send to (L1) and (L2) telephone lines through (ASW1).

If the MPU 30 transmits a dial digit through the multi-frequency code transmission control data output terminal DT, the multi-frequency transmitter in the call circuit 50 may include a multi-frequency code (MFC) corresponding to the dial digit; DTMF) is output to the telephone lines L1 and L2.

Accordingly, as the MPU 30 transmits the dialing digit memorized in the 2-7 process, the pulse dial signal or the multi-frequency code is generated in the dial pulse circuit 40 or the call circuit 50 as described above. It is sent out to the formed telephone lines L1 and L2.

In the present invention, the setting of the reserved dial mode can be executed regardless of on-hook and off-hook. However, the process of 2-0 in FIG. 2 is performed so that the MPU 30 can execute the program of FIG. 2 in the on-hook state. If the on-hook search process is set up before, the process of FIG.

As described above, the present invention can make a call automatically by reserving talk time and the other party's phone number by adding simple software to the existing phone with a built-in microprocessor, so as to facilitate user's use. This has the advantage of making the function versatile.

Claims (1)

A time-scheduling automatic dialing method of a telephone capable of forming a speakerphone communication path by incorporating a microprocessor, comprising: a time-scheduling dialing mode process (2-0) in which a reserved dialing mode signal transitions to a timeduring dialing mode upon input; -1), a reservation information storing step (2-3) of storing a reservation time and a reservation dial digit input in the time reservation dial mode process (2-0) (2-1) in an internal memory area; When the information storage process (2-3) is completed, the reservation time search process (2-5) of searching for the reservation time by comparing the time of the internal timer and the reservation time stored in the internal memory; and the reservation time search process (2 -5) If it is determined that the time of the internal timer and the reservation time are the same, a speakerphone communication path is formed, and the dial digit stored in the internal memory in the reservation information storage process (2-3) is read. A method for automatically dialing a time schedule of a telephone, comprising a dial dispensing process (2-6) (2-7) for dispensing an ear digit.

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