JP2000216872A - Telephone set with redial sorting function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store no invalid and unnecessary dial number in a redial memory. SOLUTION: When a call is originated by a dial number which can not be connected with a line due to an incorrect calling destination number, etc., by a telephone set 1 with a redial function, the dial number is not stored in the redial memory 4. In addition, the number of digits used for the call is inspected and when it cannot be as the telephone number, the dial number is not stored in the redial memory 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone with a redial function, and more particularly to a telephone with a redial function that keeps invalid and unnecessary dial numbers from being stored in a redial memory.

[0002]

2. Description of the Related Art Conventionally, in a telephone having a dial memory, a dial number of a destination is stored in the dial memory for each outgoing operation, and the dial memory always stores the latest dial number of the destination. . in this case,
If another third party performs the re-calling operation, the secret of the original caller may be leaked, which may be undesirable. Therefore, if the original caller wants to keep the caller secret, after the dial call operation, the caller further performs a call operation to a callee who is known to the third party and has no problem, and writes the contents of the dial memory. I needed to change it. Therefore, a telephone for protecting the caller's confidentiality is disclosed in, for example, Japanese Patent Laid-Open No. 60-247356 ("key telephone device"). In the key telephone apparatus disclosed in this publication, after performing a calling operation with the dial key 21 of the key telephone, and performing a predetermined prohibition operation by a caller who wants to keep secret, the cross point switch 11 is set. In addition to erasing the dial number information once stored in the dial memory 16 in the main unit provided, it is prohibited to display the dial number information on the display unit (not shown) of the key telephone while keeping the dial number information stored in the dial memory 16. Or the driving of the dial sending circuit (OPD) 14 is prohibited.

[0003] Recently, however, all numbers once used for calling are stored as redial information in a redial memory of the telephone, regardless of whether the number is valid / invalid as a telephone number. I have.

[0004]

However, if a call is made with the wrong dial number, the dial number remains in the redial memory. That is, a number that is not called again is stored in the redial memory, and the valid redial number stored before that is erased, and the redial memory is wasted. There was a problem.

Accordingly, an object of the present invention is to prevent invalid / unnecessary dial numbers from being left in the redial memory.

[0006]

According to the present invention, there is provided a temporary memory for temporarily storing an outgoing dial, a redial memory for storing a redial number, and the temporary memory. And a control unit for controlling the redial memory, and
When the number of digits of the dial number stored in the temporary memory is equal to or greater than a predetermined value, the control unit assigns a first identifier to the dial number and makes a call request.

That is, in the present invention, when a telephone having a redial function is dialed using a dial number that cannot be connected to the line due to an illegal destination number, the dial number is not stored in the redial memory. Further, the number of digits of the dial number used for calling is checked, and if the number is impossible as a telephone number, the dial number is not stored in the redial memory.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

[0009] Telephone 1 with redial selection function of the present invention
Is a control unit 5 for controlling various operations of the telephone, an operation unit 2 for performing operations such as dial input, a display unit 7 for displaying telephone numbers and the like, and a device for temporarily storing transmitted dials. A temporary memory 3, a redial memory 4 for storing a redial number, and a line connection unit 6 for making a line connection with a telephone network 8 are provided.

FIG. 2 is a block diagram for explaining the contents of the temporary memory 3. As shown in FIG. 2, the temporary memory 3 is used for storing a telephone number currently used for outgoing call and for determining whether the number is stored in the redial memory 4 when the outgoing call processing is completed. It is composed of a storability flag.

FIG. 3 is a block diagram for explaining the contents of the redial memory 4. As shown in FIG. As shown in FIG. 3, the redial memory 4 can store a plurality of redial numbers.

FIG. 4 is a flow chart for explaining the operation of the telephone 1 with a redial selection function of the present invention. As shown in FIG. 4, a call is transmitted by inputting a dial number from the operation unit 2 (S11) and going off-hook (S12).

At the start of a call, the dial number input to the operation unit 2 is notified to the control unit 5. The control unit 5 temporarily stores the dial number in the number storage unit of the temporary memory 3 (S13).

Thereafter, the control unit 5 checks the dial number. First, the number of digits of the dial number is determined and compared with the effective number of digits condition provided in the control unit.

As a result of the comparison, if the dial number does not satisfy the condition of the number of significant digits, it is determined that the dial number is not valid as a telephone number (S14).

If the transmitted number is less than three digits, no transmission request is made to the telephone network. In such a case, the above-mentioned condition of the number of significant digits is not satisfied.

If it is determined that the dialed number is not appropriate as a telephone number, the storage permission flag of the temporary memory 3 is set to disabled (S15).

Thereafter, the control unit 5 performs a connection process, and performs a line connection with the telephone network 8 through the line connection unit 6 (S1).
6).

FIG. 5A is a sequence diagram when the telephone network is disconnected. FIG. 5B is a sequence diagram in the case of notifying the telephone of the reason for the line connection failure. The telephone network 8 attempts to establish a line connection using the dial number transmitted from the telephone 1, but if the destination indicated by the dial number is not available for the line connection, the telephone network 8 informs the telephone of the reason for the line connection failure. Disconnect.

Referring again to FIG. 4, when the line connection fails (S17), the control unit 5 checks the reason for the line connection failure notified from the telephone network, and if the reason can be recognized as an illegal number (S18). ), The storage permission flag of the temporary memory is set to "not possible" (S19). An invalid number is a number such that the line connection failure reason is such as "missing number", "uncontracted", "invalid number", "invalid number format", "terminal attribute mismatch", "no route to partner", etc. .

On the other hand, "other party busy""no vacant line"
If the destination exists but the line connection fails, such as "temporary failure", it is not regarded as an unauthorized number.

When the line connection is successful, and when the reason for the failure of the call transfer is not an unauthorized number, "OK" is set in a flag indicating whether or not the dialed number can be stored in the redial memory (S20).

If the storage permission flag is set, the dial number stored in the number storage section of the temporary memory 4 is stored in the redial memory 4 (S22). Therefore, only a valid redial number is stored in the redial memory 4 of the telephone 1.

When a redial data read operation such as pressing a redial key on the operation unit 2 is performed, the control unit 5 reads data from the redial memory 4 and displays the data on the display unit 7. Since the illegal number is no longer stored in the redial memory 4 by the redial selection function, redial transmission can be performed only for a valid number.

The embodiment of the present invention has been described above. However, the present invention is not limited to this. If there is an inappropriate dial number as a telephone number among stored redial numbers, the number is redialed. It may be deleted from the information.

Therefore, a specific operation on the operation unit 2
The dial number stored in the redial memory is checked for validity as a telephone number. As a result, if some dial numbers are not valid phone numbers,
The dial number is deleted from the redial memory 4.
By doing so, the contents stored in the redial memory 4 can be organized into only data of valid dial numbers, and the redial memory 4 can be used effectively.

[0027]

According to the present invention described above, when an outgoing call is made with an incorrect number such as a missing number, the dialed number is not stored in the redial memory, and the redial memory can be used effectively. become.

Further, according to the present invention, when a call is made to an unauthorized number due to an operation error or the like, the number is not stored in the redial memory, so that the stored valid redial number is overwritten with the unauthorized number. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram of a telephone with a redial selection function of the present invention.

FIG. 2 is a block diagram of a temporary memory;

FIG. 3 is a block diagram of a redial memory;

FIG. 4 is a flowchart for explaining the operation of the telephone with a redial selection function of the present invention;

FIG. 5 is a sequence diagram for explaining a failure in line connection.

FIG. 6 is a block diagram of a conventional key telephone device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Telephone 2 Operation part 3 Temporary memory 4 Redial memory 5 Control part 6 Line control part 7 Display part 8 Telephone network

Claims (3)

[Claims] 1. A telephone comprising: a temporary memory for temporarily storing a dialed number transmitted; a redial memory for storing a redial number; and a control unit for controlling the temporary memory and the redial memory. When the number of digits of the dial number stored in the temporary memory is equal to or more than a predetermined value, the control unit assigns a first identifier to the dial number and makes a call request. Phone to do. 2. The control unit according to claim 2, wherein the property of the dial number is at least one of missing number, no contract, invalid number, invalid number format, terminal attribute mismatch, and no route to the other party. 2. The telephone according to claim 1, wherein a second identifier is assigned to the dialed number. 3. The telephone according to claim 1, wherein the control unit stores the dial number assigned with the first identifier in a redial memory.