JPH0378356A - Re-dial system for telephone set and its telephone set - Google Patents

Abstract

PURPOSE:To prevent the information of an individual from leaking out by sending only a number dialed at the time of the setting of a DP signaling system (signaling system in which a dial signal is constituted of a DC intermittent pulse) to a telephone line on the basis of the stored information of a re-dial memory at the time of re-dial call origination. CONSTITUTION:The re-dial memory 71 of a telephone set is made to stored only the number dialed at the time of the setting of the DP signaling system, and at the time of operating a re-dial key 63, only a callee number by the DP signaling system is sent to the telephone line. Accordingly, at the time of the re-dialing operation, only the callee number is sent to the telephone line, and the number dialed after the response of a callee is not sent. Thus, the secret of the individual never leaks out to other people, and the operation different from that at the last time for the same data base becomes possible by the re-dialing operation, and besides, the possibility of misconnection or disconnection is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a redial dialing system for telephones, and in particular, a telephone set connected to a telephone line of the DP signaling system (a signaling system in which the dialing signal is composed of intermittent DC pulses), Relating to a redialing method in a telephone having a function that can send a dialing signal to the called party by switching after calling the called party using the PB signal system (signaling system in which the dialing signal is composed of a two-frequency AC signal) .

(Background of the Invention) A telephone function is to memorize the number that was dialed immediately before going back to the present time, and when calling the same called party, by pressing the re-dial button, all digits of the called party's number can be entered. A so-called redial function that eliminates the need for dialing is known.

In addition to the phone call function, the phone also has functions such as calling up a database from the phone and sending IDs and various commands from the phone to the database by dialing to obtain necessary information or issue commands (for example, when saving money at a bank). Inquiries, ticket reservations, etc.) are publicly known, and in this function, the above ID and various commands are sent as dial signals based on the PB signal system, so the telephone is connected to a telephone line using the DP signal system. In such a case, the telephone set can switch the dialing signal system from the DP signal system to the PB signal system.

(Problem to be Solved by the Invention) A telephone with a redial function usually stores all digits of the dialed number. If you do, you will have the following problems:

(1) In addition to the telephone number in the database, IDs, commands, etc. are also stored, so if someone other than the person with whom you previously communicated performs a redial operation, that person will be exposed to your personal information.

(2) For example, in a telephone having a display function, the dialed number is normally displayed over all digits even when re-dialing, so there is a risk that the ID may be known by another person's re-dial operation.

(3) If the same database is accessed by a redial operation, the same command as the previous one is sent, so the redial function cannot be used if the operation is different from the previous one.

(4) Since a dial number (ID, various commands) other than the number of the called party is sent out during the re-dial operation, there is a risk of erroneous connection or non-contact.

The present invention aims to solve the above problems.

(Means for Solving the Problems) In particular, when the telephone is connected to a DP signaling telephone line, the called party number is sent as a dialing signal of the DP signaling system, and the called party number is Focusing on the fact that dialing signals (ID, various commands, etc.) sent after a caller responds are sent after being switched to the PB signaling system, only the numbers dialed when the DP signaling system was set are stored in the redial memory of the telephone. This is so that only the called party number based on the DP signal system is sent to the telephone line when a redialing operation is performed.

(Function) When re-dialing, only the number of the called party is sent to the telephone line, and the number dialed after the called party answers is not sent out, so personal secrets are not leaked to others and the same A different operation to the database than the previous one can be performed by re-dialing, and there is no possibility of erroneous connection or no connection.

(Example) The drawing is a block diagram showing an embodiment of the invention.

In the drawing, 1 is a terminal of the telephone, and in the implementation of the present invention, the terminal is connected to a DP signal system telephone line, and 2 is a terminal for making the direction of direct current supplied from the telephone line constant. Diode bridge, 3 is a DP for sending out a dial signal of the DP signal system (hereinafter referred to as DP signal)
4 is a signal transmission circuit, 4 is a speech network for telephone calls, 5 is a handset, 6 is a dial by pushbutton keys, 7 is a central processing unit, and the central processing chamber 7 receives the number dialed by the dial 6. a redial memory 71 for storing;
Based on the number dialed with the dial 6 or the number stored in the redial memory 71, the D corresponding to the number
The P flaw signal is composed of a dial signal generation circuit 72 that generates a dial signal of the PB signal system (hereinafter referred to as a PB double signal) and a control circuit 73 that controls these. Further, the dial 6 is provided with a dial signal system switching key 62 and a redial key 63 in addition to numeric keys ("1" to "O") 61.

First, a description will be given of the operation when making a normal call by dialing all the digits of the dialed number of the called party.

The telephone is set to the P signal system using a dial signal system setting switch (not shown) so that the DP flaw signal is sent unless the changeover key 62 is pressed.

When the caller removes the handset 5 from the telephone main body, confirms the dial tone from the telephone line, and dials the number of the called party by pressing the numeric keys 61 on the dial 6, the central processing unit 7 reads the dialed number of the called party, and the dial signal generation circuit 72 generates a dial signal corresponding to the called party number and sends it to the DP signal sending circuit 3, which is connected to the diode bridge 2. and sends a DP fault signal corresponding to the called party number to the telephone line via terminal 1.

Simultaneously with the above control, the control circuit 73 performs control to store the called party number information read from the dial 6 in the redial memory 71. Note that the called party number information is already stored in the redial memory 71. Sometimes the control circuit 73
controls to rewrite the called party number information with the newly read called party number, and in this way the re-dial memory 71 always stores the last called party number.

When the called party is a database, etc., when the switch key 62 is pressed after confirming the response on the database etc. side, the control circuit 73 in the central processing unit 7 switches the switch key 6
2 is read and the dialing signal system of the telephone is switched to the PB system, and a control mode is set in which the number information to be dialed thereafter is not stored in the re-dial memory 71. That is, when the switch key 62 is pressed and then the number key 61 of the dial 6 is pressed to send out the ID, the control circuit 73 reads this and drives the dial signal generation circuit 72 to correspond to the read number information. The FB signal generated by the dial signal generation circuit 72, which controls the generation of the PB double signal, the speech network 4 and the DP signal sending circuit 3 (in this case, the DP signal sending circuit 3 does not operate in the same manner, and ), is sent to the telephone line via diode bridge 2 and terminal 1. At this time, since the storage of number information in the redial memory 71 is prohibited, the number information corresponding to the PB signal sent to the telephone line is not stored, and therefore the information stored in the redial memory 71 is , only the called party number information dialed before the switching key 62 was pressed.

As described above, communication by normal dialing operation (operation of sending all digits of the called party's number using dial 6) is completed, and the call is terminated (state where handset 5 is returned to the telephone body)
In this case, the control circuit 73 performs control to return the dial signal system of the telephone to the DP signal system.

Next, the calling operation by redialing operation will be explained.

When the caller wants to talk (communicate) with the same called party as the previous time, the caller removes the handset 5 from the telephone main body, confirms the dial tone from the telephone line, and then presses the redial key 63 of the dial 6.

In the central processing unit 7, the control circuit 73 reads the press information of the redial key 63, determines that the call that has occurred is a call due to a redial operation, and reads the number information stored in the redial memory 71. It reads out the information, drives the dial signal generation circuit 72 to generate a dial signal corresponding to the number information, and sends it to the DP signal transmission circuit 3. The DP signal sending circuit 3 outputs a DP signal corresponding to the dial signal received from the dial signal generating circuit 72, and as in the above, a DP signal corresponding to the called party number is sent to the telephone line.

In the above operation, as is clear from the explanation of the operation of storing number information in the re-dial memory 71, even if a PB defect signal has been sent in the previous communication, the number information corresponding to the PB signal will not be stored in the re-dial memory 71. Since it is not stored in the memory 71, the PB signal will not be sent out during a redial operation.

(Effects of the Invention) As explained above, the present invention stores only the number information sent to the telephone line by the DP signal in the redial memory, and when making a call by redialing, the telephone Since only the number of the called party is sent and no other number information is sent, private information will not be leaked to another person due to redialing by another person, and it will not be possible to access the database etc. again. If you wish to make a communication that is different from the previous one, you can call up this database by re-dialing.
Furthermore, when calling a called party by re-dialing, no dialing signal other than the number of the called party is sent out, so there will be no erroneous connection or no call, and the present invention has extremely significant effects.

[Brief explanation of drawings]

The drawing is a block diagram showing an embodiment of the invention. (Main symbols) 3...DP signal sending circuit 6...Dial 62...Switching key 63...Re-dial key 7...Central processing unit 71...Re-dial memory 72...Dial signal generation circuit 73...control circuit 4 people

Claims (1)

[Claims] 1. The dialing system is connected to a telephone line using the DP signaling system, and after sending out a DP signal to call the called party, it is possible to send a dialing signal using the PB signaling system to the called party by switching. In telephones with functions and redial functions,
The telephone has a redial memory that stores numbers dialed when setting the DP signaling system, but does not store numbers dialed after switching to the PB signaling system, and when making a redial call, the redial memory is stored. A redialing system for telephones that sends only the number dialed when setting the DP signal system to the telephone line based on stored information. 2. For telephones that are normally set to the DP signal system and can be switched to the PB signal system, there is a switch key to switch the dial signal system from the DP signal system to the PB signal system, and a redial key. , a redial memory for storing dialed number information, and when the DP signaling system is set, the dialed number information is stored in the redialing memory, and the system is converted to the PB signaling system by operating the switching key. The number information dialed later is controlled not to be stored in the redial memory, and when the redial key is pressed, a DP dial signal is sent to the telephone line based on the number information stored in the redial memory. A telephone having a control circuit that controls the transmission.