JP2962358B1 - Telephone equipment - Google Patents

Abstract

To provide a telephone device capable of hiding a telephone number of a partner device transmitted from an exchange while a line is closed when an external device is in use. SOLUTION: When an external telephone is in use (S
3: Yes), Call Waiting Caller ID
The call waiting process is terminated without receiving the caller number sent from the exchange by the service. Therefore, since the caller number sent from the exchange is not received, the telephone number of the called device that has newly received the call is not displayed on the LCD of the facsimile device. Therefore, it is possible to keep the telephone number of the called device that has newly received a call secret without being known to anyone other than the user of the external telephone.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone device, and more particularly to a telephone device capable of receiving a telephone number (caller number) of a partner device sent from an exchange while a line is closed. .

[0002]

2. Description of the Related Art A so-called call waiting service has been put to practical use, in which when a new call is received from another party during a call, the other party can be switched by a simple operation. In this call waiting service, in the United States, the other party's device (caller) who has newly called during a call
(A so-called call waiting caller ID service) for transmitting a telephone number (caller number) from a switchboard has been put to practical use. Some telephone devices receive a caller number sent from the exchange by this service, and display the received caller number on a display (for example, a liquid crystal display (LCD)) of the telephone device during a call. Some have the function to do. Therefore, a telephone device having this function can recognize a newly called caller by looking at the display contents of the LCD.

[0003] Some telephone devices can be connected to an external telephone device (child device). If this external slave unit is connected to the telephone device of the master unit and installed in a place away from the slave unit and the master unit, one telephone line can be used in each place of the slave unit and the master unit. You can do it.

[0004]

However, if a new call arrives while the slave unit is being used, the telephone of the partner device sent from the exchange by the above-mentioned call waiting caller ID service. The number is received by the master unit and displayed on the LCD of the master unit. The telephone number of the partner device displayed on the LCD of the parent device is continuously displayed while the call continues, that is, until the telephone line is released. Therefore, there is a problem that the user of the slave unit is notified of the newly called sender by the display of the master unit.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. When an external device is in use, the telephone number of the partner device sent from the exchange while the line is closed is transmitted. It is an object of the present invention to provide a telephone device that can be hidden.

[0006]

In order to achieve this object, the telephone device according to the first aspect of the present invention has a receiving means capable of receiving the telephone number of the other device transmitted from the exchange while the line is closed. Determining means for determining whether or not the external device is in use; and, when the determining means determines that the external device is in use, the receiving means calls the other party's device. A reception prohibiting unit for prohibiting reception of the number.

A telephone device according to a second aspect of the present invention includes a display device capable of displaying characters and symbols, and a receiving device capable of receiving a telephone number of a partner device transmitted from the exchange while the line is closed. A storage unit for storing the telephone number of the partner device received by the receiving unit; a control unit for displaying the telephone number of the partner device stored in the storage unit on the display unit; and an external device. Determining means for determining whether or not the external device is in use, and display inhibiting means for inhibiting display on the display means by the control means when the external device is determined to be in use by the determining means. And

According to the telephone device of the present invention, when the telephone number of the partner device transmitted from the exchange while the line is closed is received by the receiving means, the received telephone number of the partner device is received. Is stored by the storage means,
It is displayed on the display means by the control means. In this case,
The determination means determines whether or not the external device is in use. If the result of the determination is that the external device is in use, the display of the telephone number of the partner device on the display means by the control means is inhibited by the display inhibition means. Prohibited by.

According to a third aspect of the present invention, in the telephone apparatus according to the first or second aspect, a display means capable of displaying characters and symbols and a telephone number of the other party device received by the receiving means are stored. Storage means for performing, the control means for displaying the telephone number of the partner device stored in the storage means on the display means, and when the determination means determines that the external device is not in use, the Operating means for operating the control means to display the telephone number of the partner device on the display means.

According to the telephone device of the third aspect, the telephone device operates in the same manner as the telephone device of the first or second aspect, and the telephone number of the other party device received by the receiving unit is stored by the storage unit. You. Here, when it is determined by the determining means that the external device is not in use, the control means is operated by the operating means, and the telephone number of the partner device stored in the storage means is displayed on the display means.

According to a fourth aspect of the present invention, in the telephone device of the third aspect, there is provided an erasing means for erasing the telephone number of the other device displayed on the display means by the control means in response to a predetermined trigger. Have.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. First, referring to FIG. 6, when there is a new incoming call, transmission / reception between the called device subscribed to the call waiting caller ID service described in the section of the prior art and the exchange. Various signals to be performed will be described.

As shown in FIG. 6, first, an exchange 80 sends an SAS (Subscriber Alerting Signa) to a called apparatus 90.
l) The signal 71 is transmitted. The SAS signal 71 is a signal for notifying the user of the called device 90 that a new call has been received during a call. The frequency of the SAS signal 71 is 440 Hz, and the length of the signal 71 is from 250 ms to 1 s. The SAS signal 71 is received from the exchange 80 until the user of the called device 90 switches to the newly called telephone or the call of the newly called device is interrupted. It is transmitted to the calling device 90 at intervals of about 4 s.

Following transmission of the SAS signal 71, the exchange 8
0 to the called device 90 from the CAS (Customer Premises Eq.
A uipment Alerting Signal (CPE Alerting Signal) signal 72 is transmitted. The CAS signal 72 is transmitted to the called device 90 by a call waiting caller ID.
This signal indicates that the telephone number (caller number) of the partner device (caller device, caller) that has newly received a call by the service is notified. The frequency of the CAS signal 72 is 213
It is a combination of the frequency of 0 Hz and the frequency of 2750 Hz, and the length of the signal 72 is from 80 ms to 85 ms. The CAS signal 72 is a pair of signal with the SAS signal 71 and, like the SAS signal 71, is switched to a newly called telephone by the user of the called device 90,
Alternatively, the call is transmitted from the exchange 80 to the called device 90 at intervals of about 4 s until the call from the called device that has newly received the call is interrupted.

When the SAS signal 71 is received by the called device 90, an ACK (Acknowle) indicating that the calling number 74 can be received from the called device 90 to the exchange 80.
dgment) signal 73 is transmitted. The frequency of the ACK signal 73 is a combination of the frequency of 941 Hz and the frequency of 1633 Hz, and the length of the signal 73 is 55 ms to 65 ms.
ms. When ACK signal 73 is received by exchange 80, caller number 7 is sent from exchange 80 to called device 90.
4 is transmitted. In the United States, the SAS signal 71
And the CAS signal 72 are transmitted twice from the exchange 80 to the called device 90 at intervals of about 10 s.

If the subscriber is subscribed to the call waiting caller ID service, the caller number 74 is not always transmitted from the exchange 80 when a new incoming call is made. Specifically, when the other party's device refuses the notification of the telephone number, the exchange 80 sends the called device 9
No caller number 74 is sent to 0. However, even in such a case, information indicating that the caller number 74 cannot be transmitted is transmitted to the called device 90.

On the other hand, signals transmitted and received between the exchange 80 and the called device 90 when the called device 90 does not subscribe to the call waiting caller ID service will be described. In this case, only the signal 71 excluding the parentheses in FIG. 6, that is, only the SAS signal 71 is transmitted from the exchange 80 to the called device 90.

The facsimile apparatus 1 of this embodiment determines whether or not the external telephone device (external telephone) 50 (see FIG. 1) is in use. The reception of the caller number 74 sent by the calling / caller ID service is prohibited. In this embodiment, the exchange 80 in FIG.
9 and the called device 90 will be described as the facsimile device 1.

FIG. 1 is an external perspective view of a facsimile apparatus 1 to which an external telephone 50 is connected. Facsimile machine 1
The handset 3 is attached to the side of the main body 2 of FIG.
The receiver 3 is placed on a hook (not shown) provided on the main body 2 during a non-call, and is picked up and used during a call. The former is called an on-hook state, and the latter is called an off-hook state.

An operation panel 4 provided with a plurality of keys 4a is provided at the front of the upper surface of the main body 2, and at the rear left of the operation panel 4 is a telephone number (calling number) of a called device that has newly received a call. A liquid crystal display (LCD) 5 for displaying the user number is provided.

At the left end of the operation panel 4, a switch key 4b and a hold key 4c are provided in order from the top. The switching key 4b is used to switch the connected telephone line between one partner device and a partner device that has newly received a call.

The hold key 4c is used to temporarily hold a telephone call during a call. When the hold key 4c is pressed by the user when the other party's device and the newly-received partner's device are closed at the same time, the display of the caller number is erased from the LCD 5. Therefore, even if the hold key 4c is pressed by the user and the device to talk to is changed from the facsimile device 1 to the external telephone 50, the telephone number of the partner device that has newly received the call is displayed on the LCD 5 of the facsimile device 1. It does not remain and is kept secret without being known to anyone other than the user.

The facsimile apparatus 1 has an operation panel 4
Each key 4a provided above is operated by being pressed, and the operation state and operation procedure are displayed on the LCD.
5 is displayed.

A document insertion slot 6 is provided at the rear of the operation panel 4 and the LCD 5. The original to be transmitted by facsimile is inserted into the original insertion slot 6 with the original surface facing downward, and after reading is performed, the original is sent from an original exit 7 provided on the front surface of the main body 2 and below the operation panel 4. Is discharged. A recording paper holder mounting portion 9 is provided at the rear of the document insertion slot 6, and a recording paper holder 10 capable of stacking and storing a plurality of recording papers is detachably mounted on the recording paper holder mounting portion 9. ing. The recording paper supplied from the recording paper holder 10 and used for printing is discharged from a recording paper discharge port 8 provided below the document discharge port 7. A speaker 28 is provided on one side of the main body 2 for sounding a ringing tone when an incoming call is received.

An external telephone (external telephone device) interface 34 (see FIG. 2) as a connection port is provided on the back of the main body 2. The facsimile machine 1 is connected to an external telephone 50 via a cable 35 connected to the external telephone interface 34. Note that the connection between the facsimile machine 1 and the external telephone 50 is not necessarily limited to the cable 35, and may be connected wirelessly.

FIG. 2 is a block diagram showing the electrical configuration of the facsimile machine 1. The facsimile device 1 includes a CPU 11, a ROM 12, an EEPROM 13, an RA
M14, image memory 15, audio memory 16, audio LSI
17, a network control unit (hereinafter referred to as "NCU") 19, a modem 20, a buffer 21,
A scanner 22, an encoding unit 23, a decoding unit 24, a printer 25, an operation panel 4, an amplifier 27, a detection circuit 33, and an external telephone interface 34 are provided, and these are mutually connected via a bus line 30. ing.

The NCU 19 is for performing line control, and the facsimile machine 1 is connected to the telephone line 31 via the NCU 19. NCU 19 is the exchange 2
9 and a caller number 74, and a key 4a provided on the operation panel 4.
This is for transmitting a dial signal at the time of calling according to the operation to the exchange 29, and for transmitting and receiving an analog voice signal during a call. When the external telephone 50 is in use, the reception of the caller number 74 sent from the exchange 29 is prohibited. Therefore, the telephone number of the other party device that has newly received a call is displayed on the LCD of the facsimile device 1.
5 and is kept secret without being known to anyone other than the user of the external telephone 50.

The CPU 11 controls each unit connected by the bus line 30 in accordance with various signals transmitted and received via the NCU 19 to execute a facsimile operation and a telephone operation, that is, data communication. ROM 12
This is a non-rewritable memory that stores a control program executed by the facsimile machine 1 and the like. The program shown in the flowchart of FIG. 4 is stored in the ROM 12. The EEPROM 13 is a rewritable nonvolatile memory, and data stored in the EEPROM 13 is retained even after the power of the facsimile apparatus 1 is turned off.

The RAM 14 is a memory for temporarily storing various data when each operation of the facsimile machine 1 is executed, and includes a caller number memory 14a.

The caller number memory 14a stores the caller number 74 sent from the exchange 29 by the above-described call waiting caller ID service when a new incoming call is received during a call with one other party's device. This is a memory for temporarily storing. For this reason, if the caller number 74 is not transmitted from the exchange 29 even if there is a new incoming call during a call, the contents of the caller number memory 14a are cleared to "0". Therefore, the content of the caller number memory 14a is checked, and if it is not "0", the caller number memory 14a
If the contents of the caller ID memory 14a are "0", it can be determined that the call is an incoming call from the other party's device with the telephone number stored in the other party's device. Can be determined that the telephone number (caller number 74) has not been transmitted from the exchange 29.

The image memory 15 is a memory for storing a communication history, image data, and a bit image for printing.
It is composed of an AM (DRAM). The received image data is temporarily stored in the image memory 15, printed on recording paper by the printer 25, and then deleted from the image memory 15. Generally, the image data has a large capacity, but since the image data is deleted on condition that the image data is printed, the image memory 15 can be used effectively. The voice memory 16 is a memory for storing a message notified to the user, a response message sent to the partner device, and an incoming message sent from the partner device. Like the image memory 15, a dynamic RAM which is an inexpensive large-capacity memory
(DRAM). The incoming message stored in the voice memory 16 is erased by performing an erasing operation via the operation panel 4 or by receiving an erasing command sent from another device connected to the telephone line. You.

The detection circuit 33 is for detecting that the external telephone 50 is being used, and its configuration will be described with reference to FIG. FIG. 3 is a diagram showing the wiring of the detection circuit 33 in a simplified manner. As shown in FIG.
9 and the facsimile machine 1 are connected by a telephone line 31, and the facsimile machine 1 and the external telephone 5
0 is connected by a cable 35. Switch SW for closing the telephone line of facsimile machine 1
1 is provided inside the facsimile apparatus 1, and a switch SW 2 for closing the telephone line of the external telephone 50 is provided inside the external telephone 50. This switch SW
1 and the switch SW2 are connected in parallel with each other. The detection circuit 33 is provided inside the facsimile machine 1, and is connected between the switch SW1 and the switch SW2 and in series with the switch SW2 in parallel with the switch SW1.

When the switch SW1 is closed and the telephone line of the facsimile machine 1 is closed, the facsimile machine 1
A current flows through the telephone line 31 connecting the telephone line and the exchange 29. In this case, no current flows through the cable 35 because the switch SW2 is open. That is, no current flows through the detection circuit 33. On the other hand, when the switch SW2 is closed and the telephone line of the external telephone 50 is closed, a current flows between the external telephone 50 and the exchange 29. In this case, since current flows through the telephone line 31 and the cable 35, current also flows through the detection circuit 33, and it is determined that the external telephone 50 is in use.

The audio LSI 17 shown in FIG.
Performs a voice recognition process for converting an analog voice signal received by the facsimile apparatus 1 into a digital voice signal, and converts a digital voice signal generated inside the facsimile apparatus 1 into an analog voice signal, and the NCU 19 and the speaker 28 (amplifier 27). This is for performing a speech synthesis process for outputting to the user.

The modem 20 modulates and demodulates image information and transmits the same, and also transmits and receives various procedural signals for transmission control. The buffer 21 stores a code transmitted and received between the other party's facsimile machine. This is for temporarily storing data including the converted image information. The scanner 22 is for reading an image from a document inserted into the document insertion slot 6, and the encoding unit 23 is for encoding an image read by the scanner 22. The decoding unit 24 includes the buffer 21 or the image memory 15
Is for reading out the received image data stored in the printer 25 and decoding the received image data. The decoded data is printed by a printer 25 on recording paper.

The operation panel 4 is used by the user (operator) to perform various operations when setting the facsimile apparatus 1 and the like.
To output a ringing tone, voice, and the like by sounding a speaker 28 connected to the speaker 28.

Facsimile apparatus 1 configured as described above
Are connected to the telephone line 31 via the NCU 19. The telephone line 31 is connected to the exchange 29 of the facsimile machine 1.
And the exchange 29 is connected to another exchange via a telephone line 32. The other exchanges are further connected to the partner device via a telephone line.

Next, referring to the flowchart of FIG.
The operation of the facsimile machine 1 configured as described above will be described. FIG. 4 is a flowchart showing the call waiting process. As shown in FIG. 4, the facsimile machine 1 waits for the reception of a SAS signal 71 notifying that a new incoming call has been received while the telephone line is closed with one partner device (S1: No). ), If the SAS signal 71 is received (S1: Yes), it is confirmed whether or not the CAS signal 72 indicating the notification of the telephone number (caller number) of the called device that has newly received the call is received. (S2). Exchange 29
If the external device 50 receives the CAS signal 72 (S2: Yes), it checks whether the external telephone 50 is in use (S3).
If the external telephone 50 is not in use (S3: No), the ACK signal 7 indicating that the caller number 74 can be received.
Is transmitted to the exchange 29 (S4). After transmitting the ACK signal 73, it is determined whether or not the caller ID 74 sent from the exchange 29 has been received by the call waiting caller ID service (S5). If the result of the determination is that the caller number 74 has been received (S5: Yes), the caller number 74 is written into the caller number memory 14a (S6),
The contents of the caller number memory 14a are displayed on the LCD 5 (S7).

On the other hand, even if the facsimile apparatus 1 has subscribed to the call waiting caller ID service, if the caller refuses to transmit the telephone number,
Since the caller number 74 is not transmitted from the exchange 29, the caller number 74 cannot be received. Therefore, in such a case (S5: No), the contents of the caller number memory 14a are cleared to "0" (S8), and the fact that the caller number 74 could not be received is stored.

In the process of S3, when the external telephone 50 is in use (S3: Yes), the call waiting process is terminated without performing the processes from S4 to S7. Thus, when the external telephone 50 is in use,
Since the caller number 74 sent from the exchange 29 is not received, the telephone number of the called device that has newly received the call is not displayed on the LCD 5 of the facsimile device 1. Therefore, the telephone number of the other party device that has newly received the call is the external telephone 5
It is kept secret without being known to anyone other than the 0 user.

In the process of S2, if the CAS signal 72 is not received (S2: No), the facsimile machine 1
Has not subscribed to the call waiting caller ID service, and thus skips the processing from S4 to S8.

Next, it is confirmed whether or not the SAS signal 71 continues (S9). If the SAS signal 71 continues (S9: Yes), it is confirmed whether the user has pressed the switching key 4b (S10). If the switching key 4b is not pressed (S10: No), the processes of S9 and S10 are performed until the SAS signal 71 is interrupted, that is, until the outgoing call of the counterpart device that has newly received the call is interrupted. repeat. On the other hand, if the SAS signal 71 is interrupted (S9:
No), the call waiting process ends.

In the process of S10, if the switch key 4b is pressed (S10: Yes), the call partner is switched to the device of the newly called party (S11), and the telephone process is executed (S12). Hold key 4c during telephone processing
If is not pressed (S13: No), S12 to S1 until the switching key 4b is pressed (S14: No).
The processing up to 4 is repeated. On the other hand, if the hold key 4c is pressed (S13: Yes), the display of the contents of the caller number memory 14a from the LCD 5 is deleted (S15). After the deletion, the call waiting process ends. In the process of S14, if the switching key 4b is pressed (S14:
Yes), the call partner is switched (S16), and the call waiting process ends.

As described above, the hold key 4c is set by the user.
Is pressed, the caller number memory 14a is
The display of the contents of is deleted. For example, in order to change the communication device from the facsimile device 1 to the external telephone 50,
When the user presses the hold key 4c, the telephone number of the newly-received destination device displayed on the LCD 5 of the facsimile device 1 is deleted. Therefore, even if the device to talk on is changed from the facsimile device 1 to the external telephone 50, the telephone number of the newly-arrived partner device can be kept secret without being known to anyone other than the user.

Next, a second embodiment will be described with reference to FIG. The second embodiment is a modification of the flowchart of FIG. 4 described above, and is a modification of the procedure until a process for confirming whether or not the external telephone 50 is in use is performed. Hereinafter, the same portions as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Only different portions will be described.

As shown in FIG.
If the signal 71 and the CAS signal 72 are received (S1: Ye
s, S2: Yes), and transmits an ACK signal 73 to the exchange 29 (S21). After transmitting the ACK signal 73, call
Exchange 2 by Waiting Caller ID service
It is determined whether or not the caller number 74 sent from No. 9 has been received (S22). If it is determined that the caller number 74 has been received (S22: Yes), the caller number 74 is written to the caller number memory 14a (S23). After writing, it is confirmed whether the external telephone 50 is in use (S2).
4) If the external telephone 50 is not in use (S24: N)
o), the contents of the caller number memory 14a are displayed on the LCD 5 (S25). On the other hand, if the external telephone 50 is being used (S24: Yes), the call waiting process is terminated without performing the process of S25. In the process of S22, if the caller number 74 has not been received (S22: No), the content of the caller number memory 14a is cleared to "0".

As described above, when the external telephone 50 is in use, the contents of the caller number memory 14a, that is, the telephone number of the destination device that has newly received a call is not displayed on the LCD 5 of the facsimile device 1. It is displayed. Therefore, the telephone number of the counterpart device that has newly received the call is kept secret without being known to anyone other than the user of the external telephone 50.

In the second embodiment, if it is determined that the external telephone 50 is in use, the external telephone 50 does not even receive the telephone number of the called device that has newly received a call. If it is determined that the telephone 50 is in use, the telephone number of the called device that has newly received the call is received and the caller number memory 14a is received.
, But is not displayed on the LCD 5. In addition,
In the second embodiment, the flowchart of FIG. 5 is stored in the ROM 12 shown in FIG.

In this embodiment, the processing in S3 corresponds to the determining means described in claim 1. Claims 1 and 3
The reception prohibiting means described in (4) and (4) corresponds to the Yes branch processing of S3. The storage means according to claim 2 is S
The processing of S23 corresponds to the processing of S23, and the processing of S24 corresponds to the determining means. The display prohibiting means according to the second to fourth aspects includes Yes in S24.
Branch processing. The processing of S6 and S23 as the storage means, the processing of S7 and S25 as the control means, the processing of S3 and S24 as the determination means, and the processing of S7 and S25 as the operation means according to claim 3 or 4. Corresponds to each. The erasing means described in claim 4 corresponds to the processing in S15.

As described above, the present invention has been described based on the embodiments. However, the present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the gist of the present invention. Can easily be inferred.

[0051]

According to the first aspect of the present invention, when the determining means determines that the external device is in use, the receiving prohibiting means prohibits the receiving means from receiving the telephone number of the partner device. Is done. Therefore, when the external device is being used, there is an effect that the telephone number of the partner device that has newly received a call can be hidden on the display means. Therefore, the user of the external device can keep the telephone number of the counterpart device that has newly received a call secret.

According to the telephone device of the second aspect, when the judging means judges that the external device is in use, the display prohibiting means prohibits the control means from displaying the telephone number of the partner device. . Therefore, when the external device is being used, there is an effect that the telephone number of the partner device that has newly received a call can be hidden on the display means. Therefore, the user of the external device can keep the telephone number of the counterpart device that has newly received a call secret.

According to the telephone device of the third aspect, in addition to the effect of the telephone device of the first or second aspect, when the external device is determined not to be in use by the determining means, the operation is started. The control means is operated by the means, and the telephone number of the partner device is displayed on the display means. Therefore, the user of the telephone device can recognize the newly called device only by looking at the contents displayed on the display means.

According to the telephone device of the fourth aspect, in addition to the effect of the telephone device of the third aspect, further, the telephone number of the partner device displayed on the display means by the control means is:
The data is erased by the erasing means at a predetermined timing. Therefore, there is an effect that the user of the telephone device can delete the telephone number of the partner device displayed on the display means in response to a predetermined trigger.

[Brief description of the drawings]

FIG. 1 is a perspective view of a facsimile apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical configuration of the facsimile apparatus.

FIG. 3 is a diagram schematically illustrating wiring of a detection circuit.

FIG. 4 is a flowchart showing a call waiting process.

FIG. 5 is a flowchart illustrating a call waiting process according to the second embodiment.

FIG. 6 is a diagram showing a procedure in transmitting and receiving various signals between the exchange and the called device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Facsimile apparatus (telephone apparatus) 4b Switching key 4c Hold key 5 Liquid crystal display (LCD) (display means) 14 RAM 14a Caller ID memory (storage means) 19 Network control unit (NC)
U) (part of receiving means) 20 Modem (part of receiving means) 21 Buffer (part of receiving means) 29 Switchboard 31, 32 Telephone line 50 External telephone (external device) 74 Caller ID (other device) Phone number)

Continuation of the front page (56) References JP-A-8-178164 (JP, A) JP-A-9-135301 (JP, A) JP-A-9-233174 (JP, A) JP-A-10-13524 (JP) , A) JP-A-10-243063 (JP, A) JP-A-11-112609 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04M 1/00 H04M 1/57

Claims (4)

(57) [Claims] 1. A telephone device provided with a receiving device capable of receiving a telephone number of a partner device transmitted from an exchange while a line is closed, a determining device for determining whether an external device is in use. And a reception prohibiting unit for prohibiting the receiving unit from receiving the telephone number of the partner device when the external unit is determined to be in use by the determining unit. apparatus. 2. A telephone device comprising: display means capable of displaying characters and symbols; and receiving means capable of receiving a telephone number of a partner device transmitted from an exchange while a line is closed. Storage means for storing the telephone number of the other device received by the control unit, control means for displaying the telephone number of the other device stored in the storage means on the display means, and whether or not the external device is in use Determining means for determining whether the external device is in use by the determining means, and display inhibiting means for inhibiting display on the display means by the control means. Characteristic telephone equipment. 3. A display means capable of displaying characters and symbols, a storage means for storing the telephone number of the partner device received by the receiving means, and a telephone number of the partner device stored in the storage means. Control means for displaying on the display means; and when the determination means determines that the external device is not in use, actuates the control means and displays the telephone number of the partner device on the display means. The telephone device according to claim 1, further comprising an operating unit that performs the operation. 4. The telephone apparatus according to claim 3, further comprising an erasing means for erasing a telephone number of the partner device displayed on said display means by said control means in response to a predetermined trigger.