JP2001069227A - Telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a telephone system dealing with ISDN capable of storing a caller side telephone number sent to be superimposed on a SETUP signal when an incoming call arrives only when the incoming call is not answered. SOLUTION: This telephone system is provided with a memory means 23 for storing calling information sent an incoming call arrives, a means 24 for detecting the on-hook state of a handset 2, and a means for storing the calling information sent together with the incoming call once in the means 23 when the incoming call arrives and then deleting the calling information stored in the means 23 on the basis of a fact that the detecting means 24 detects that the handset 2 becomes an off-hook state while the incoming call arrives.

Description

DETAILED DESCRIPTION OF THE INVENTION

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone apparatus for receiving information that can identify a calling party when receiving a call.

2. Description of the Related Art In U.S. Pat. No. 3,904,830, a telephone number of a calling party is transmitted from a calling party upon receipt of an interrogation signal from the called party, and the telephone number is transmitted by the called party. A telephone device capable of displaying a number is disclosed. Also, among the INDN services called “INS Net 64” and “INS Net 1500” of Nippon Telegraph and Telephone Corporation, there is a basic service called “Caller ID Notification”. In this service, the telephone number of the calling party is transmitted from the net to the called party. Displaying this number on the called party makes it easy to identify the calling party.

In the above-mentioned calling number notification service, whether the called party answers the telephone or not, the calling party's telephone number is always transmitted to the called party and displayed. However, when the called party answers the phone and is notified, the phone number of the calling party obtained by the above service is not necessarily important information, and it should not be displayed or stored forever. Wasted in a way.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and is characterized by a memory means for storing call information sent at the time of an incoming call, and an on-hook state of a handset. Means for temporarily storing the outgoing call information sent together with the incoming call when there is an incoming call in the memory means, and then detecting the off-hook state of the handset during the incoming call. And means for deleting the call information stored in the memory means based on the detection of the call. According to the above-mentioned feature, the caller telephone number when the call is not answered It is possible to store and hold only

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an IS according to the present invention.
1 is an external view showing an example of a DN-compatible telephone device (1);
In the figure, reference numeral (2) denotes a handset, and (3) denotes a dial key portion for inputting a dial number or the like. An asterisk key (4) and a sharp key (5) in which “*” and “#” are respectively described. (6)
Is a display unit composed of, for example, a liquid crystal display unit. The display unit displays the telephone number of the calling side sent at the time of receiving a call.
The display will be described later in detail. (7)
(8) is an up / down scroll key, and the display on the display unit (6) can be scrolled up / down by operating the key. (9) and (10) are up and down cursor keys, and the cursor (11) on the display unit (6) can be moved up and down by operating the keys. (12) is a clear key, which instructs to delete the display content on the display unit (6). FIG. 2 is a block diagram showing a circuit configuration of the present embodiment. In FIG. 2, (13) is a control unit composed of a microcomputer, (14) is a program memory,
The control section (13) controls each section described below based on a control program stored in the program memory (14). In addition, each part and the control part (1
3) is connected by a bus (15). (16) is I
The SDN line has a “2B + D” configuration including, for example, two B channels of 64 kbps and one D channel of 16 kbps. This line is connected to another telephone or facsimile machine via a relay station (ISDN network). (17) is, for example, an S / I / F comprising a semiconductor integrated circuit μPD98201 manufactured by NEC Corporation, and the S / I / F is a CCITT Recommendation I.F. 430 satisfies the physical conditions for data transmission such as the communication speed specified in layer 1. Also, this SI
/ F (17) forms the data sent via the bus (15) into a frame so that it can be sent to three channels of the ISDN line (16), and then sends the frame to the line (16).
The data for each frame transmitted via each channel of the SDN line (16) is decomposed for each channel and the
Send to 5). (18) is a LAPD (L) comprising, for example, a semiconductor integrated circuit μPD72305 manufactured by NEC Corporation.
Ink Access Procedure on t
The LAPD exchanges control data called call control with another device via the D channel under the control of the control unit (13).
(19) is, for example, a semiconductor integrated circuit μ manufactured by NEC Corporation.
LAPB (Link Access) composed of PD72107
ss Procedure Balanced), and the LAPB controls transmission and reception of audio data by the control unit (13).
Under the control of (20) is a semiconductor integrated circuit HD81020 (or 8101) manufactured by Hitachi, Ltd.
9) is a voice codec,
Represents the voice band signal input from the handset (2) as μ
-Conversion into a PCM-converted digital signal using a law-law coding (or A-law-law coding) method, or conversely, PCM-converted digital signal into a voice band signal and output to a handset (2) Or (21) is a working memory composed of, for example, a semiconductor RAM (random access memory), in which variables and the like required when the control unit (13) controls the control operation are stored. Numeral (22) denotes a speed dial memory made up of, for example, a semiconductor RAM. The memory includes, as shown in FIG. 3, a counterpart telephone number corresponding to each abbreviated number and counterpart information indicating the name of the counterpart identified by the telephone number. Are respectively stored. The information in the memory (22) can be arbitrarily set and registered by the user. The dialing of the other party's telephone number is performed by picking up the handset (2), depressing the asterisk key (4) of the dial key part (3) once, and using the numeric keypad to enter the abbreviated number corresponding to the desired telephone number. You can do this by typing (23) is a call number memory composed of, for example, a semiconductor RAM, and stores the item number, the destination information, the corresponding abbreviated number, and the called date and time in association with each other as shown in FIG. The above item number indicates the order of the incoming call, and the destination information is the telephone number of the calling side transmitted via the D channel at the time of the incoming call or the other party information specified by this telephone number as described later. The corresponding abbreviated number indicates the abbreviated number in the abbreviated dial memory (22) in which the same information as the telephone number or the like stored as the destination information is stored.
It should be noted that the storage of "99" as the corresponding abbreviated number indicates that the same information does not exist in the abbreviated dial memory (22). The incoming call date and time indicates the date and time when there is an incoming call from the other party specified by the other party information, and this date and time is output from a clock circuit built in the control unit (13).
(24) is a hook detector, which detects whether or not the handset (2) is picked up for a call and sends the detection result to the control unit (13). (25)
Denotes a key input unit, which collectively includes the dial key unit (3), the up / down scroll keys (7) / (8), the up / down cursor keys (9) / (10), and the clear key (12). FIG. 5 is a block diagram showing a 2nd network connected to the ISDN network NW.
FIG. 3 is a schematic diagram showing general call control when a line is connected between terminals TE1 and TE2, and the call control will be described first before describing the operation of the apparatus of the present embodiment. Note that all transmission and reception of signals in this call control are performed via the D channel. Now, let TE1 be the calling side and TE2 be the called side.
When calling TE2 from E1, first, TE1 receives not only service information indicating whether the own device is a facsimile device or a telephone device, but also a telephone number for specifying the own device, a telephone number for specifying TE2, and the like. SE for call setup information
It is transmitted to the NW as a TUP signal. Since the NW knows in advance the type of each terminal connected to this NW, upon receiving the SETUP signal, the NW determines whether the device types of the TE1 and TE2 are the same, When the two terminals are different, a DISC signal (not shown) representing information indicating that connection is not possible (release completion information) is transmitted to the terminal TE.
1 to invalidate the SETUP signal from TE1. On the other hand, if it is determined that TE1 and TE2 are the same type of device, the NW sends call setting information indicating that connection is possible to C1.
The signal is returned to the terminal TE1 as an ALL PROC signal. However, since the NW also knows the use state of the B channel of each terminal connected to this NW, even if the terminal TE
Even if 1 and TE2 are of the same type, TE
When all the B channels 2 are in use, a DISC signal (not shown) indicating that connection is not possible is returned to the terminal TE1. Further, when the NW returns information indicating that connection is possible to the terminal TE1, the NALL
Information specifying the B channel used for exchanging data (audio data, image data, etc.) between the terminal TE1 and the network NW is also returned in the ROC signal. This B channel identification information is obtained from TE1
If it is included in the UP signal and transmitted,
According to the data in the ETUP signal,
If not included in the signal, the NW selects and returns an unused B channel connecting to TE1. When returning the CALL PROC signal indicating that the connection is possible to the terminal TE1, the NW subsequently transmits a call setting signal SETUP to the terminal TE2. This SWTUP signal is added to the SETUP signal transmitted from the TE1 to the NW by NW-
Information for specifying a B channel used for exchanging data between the TEs 2 is added. The above NW
Included in the SETUP signal transmitted to TE2 from
When the TE1 is transmitted to the NW, the NW determines whether or not the telephone number is an accurate number for specifying the TE1. To a new number. SETU from NW
The terminal TE2 that has received the P signal determines whether or not the function required from this signal is executable, and if it is executable, indicates that the terminal TE2 can be connected to the NW.
A PROC signal is returned. If the connection is not possible, a DISC signal (not shown) indicating that connection is impossible is returned. NW
Receives a DISC signal indicating that connection is impossible from TE2, transmits a DISC signal indicating that connection is not possible to TE1, and invalidates the connection between TE1 and TE2. On the other hand, TE
2 returns a CALL PROC signal indicating that connection is possible to the NW, the TE2 notifies the user of the incoming call, and also transmits an ALERT signal indicating that the notification is being performed to the NW. Send to NW is TE
2 receives the ALERT signal from TE1.
Send to Then, when the terminal TE2 enters an operable state in response to the above notification, the TE2 changes the response signal CONN to N.
W, and a response confirmation signal CONN ACK from the NW
The communication with TE1 is started after the reception of.
NW is CALL indicating that connection is possible from TE2.
When a PROC signal is received and subsequently an ALERT signal is received, this is transferred to the terminal TE1, and
A CONN ACK signal is returned to the terminal TE2 to enable data communication between the terminals. Then, the terminals TE1 and T
E2 exchanges data via the B channel determined by the call control. This communication control is performed by LAPD
LAPB (19) does not (18). Next, the operation of the apparatus of this embodiment will be described with reference to the flowcharts shown in FIGS. 6 and 7 show the control programs in the program memory (14). In step S1 of FIG. 6, the control unit (1
3) determines whether or not a SETUP signal has been sent from the network side via the ISDN line (16).
The determination is made based on the signal from 8), and if it is not sent, the process proceeds to step S2 in FIG. In step S2, it is determined whether or not the handset (2) is in the off-hook state in which the handset (2) is picked up based on the detection result of the hook detector (24).
Proceed to step. In step S3, the key input unit (2
It is determined whether or not an operation has been performed on the key of 5). If it is determined that no operation has been performed, the process returns to step S1. That is, in a standby state in which there is no incoming call from the line (16) and there is no operation on the handset (2) and the key input unit (25), the control unit (13) circulates a loop consisting of steps S1 to S3. On the other hand, if it is determined in step S1 that there is an incoming call, in step S4, connection is determined based on the SETUP signal transmitted as described with reference to FIG.
D (18), a CALL PROC signal is sent to the ISDN line (16) via the S-I / F (17),
A notification for notifying the user of the incoming call is performed, and an ALERT signal indicating this notification is transmitted to the LAPD (18) and the SI /
The data is sent to the ISDN line (16) via the F (17).
In the subsequent S5 step, the telephone number of the other party (calling side) included in the SETUP signal and information specifying the same (hereinafter, this information and the telephone number of the calling side are collectively referred to as the calling side). Information) is stored in the call number memory (2
Store in 3). Specifically, first, it is determined whether or not the calling telephone number matches the other party's telephone number registered in the speed dial memory (22). The other party information stored in the dial memory (22) is stored in the other party information column of the call number memory (23), and the abbreviated dial memory (23) is stored in correspondence with the other party information stored in the other party information column. ) Is stored in the call number memory (2
Store in the corresponding abbreviation number column of 3). The date and time data at the time of the incoming call is stored in the incoming call date and time column of the call number memory (23). The date and time data is stored in the control unit (13).
From a built-in clock circuit (not shown). On the other hand, if it is determined that the calling telephone number does not match the other party telephone number in the speed dial memory (22), the calling telephone number is stored in the other party information column of the calling number memory (23). The corresponding abbreviated number column stores a numerical value such as "99" that does not match the abbreviated number in the abbreviated dial memory (22). At this time, data indicating the date and time when the incoming call is received is stored in the incoming call date and time column. The storing of the calling side information in the calling number memory (23) is performed in accordance with the numerical value of the item number in the order of the incoming call. When the process in step S5 ends, the process proceeds to step S6. In step S6, it is determined whether the called party has answered. That is,
The hook detector (2) determines whether the handset (2) has been taken up in response to the notification performed in step S4.
The control unit (13) makes a determination based on the output from 4).
In this determination, if it is determined that there is no response, the process proceeds to step S7. In this S7 step, it is determined whether or not the incoming call has been completed. More specifically, if the calling party puts down the handset and terminates the call because the called party does not answer, a DISC signal indicating the end of the call is sent from the calling party to the called party via the ISDN network. Therefore, the presence or absence of this DISC signal is determined. If it is determined that the incoming call has not ended, the process returns to step S6. Therefore, the steps S6 and S7 are repeated unless the caller responds to the call and the caller does not terminate the call. If it is determined in step S7 that the incoming call has been terminated, the process proceeds to step S8. In step S8, a message indicating that there is an incoming call such as "There was a call while absent" is displayed on the display unit (6), and the message is being displayed in the following step S9. Is set to “0”. This flag F is used for the working memory (2
Set during 1). When the process in step S9 is completed, the process returns to step S1 and enters a standby state. S
Returning to step 6, if it is determined in this step that there is a response, the process proceeds to step S10. In this S10 step, the data of the destination information, the corresponding abbreviated number, and the date and time of the incoming call stored in the call number memory (23) are deleted by executing the latest S5 step. Therefore, only the information corresponding to the incoming call for which the user did not answer is stored in the call number memory (23). In a succeeding S11 step, it is determined whether or not the call is ended. Specifically, based on the output from the hook detector (24), it is determined whether or not the handset (2) is in an on-hook state in a standby state, and the call is continued until the handset (2) is in an on-hook state. It is assumed that the process is performed, and the step S11 is circulated. In addition, the process of determining that the on-hook state has been set is returned to step S1 to be in a standby state. Returning to the step S2 in FIG. 7, when the off-hook state is detected in this step, the control unit (13) regards that a calling operation is performed, and advances the processing to the step S12. The calling operation in step S12 includes: a. Entering the other party's telephone number using only the numeric keypad b. Method by reading out the other party's telephone number in the speed dial memory (22) c. There are three methods, that is, a method based on the other party information in the call number memory (23). When the numeric keypad is input following the step S2, the control unit (13) regards the above method a. The digit string output from the key input section (25) according to this input is used as the other party's telephone number on the ISDN line (1).
The LAPD (18) is controlled so as to output as one data of the SETUP signal to the D channel of 6). Also,
Following the process of step S2, an asterisk key (4),
When the numeric keypad is continuously input, the control unit (13)
Reads the other party's telephone number stored in the abbreviated dialing memory (22) corresponding to this number as the abbreviated number string inputted after the asterisk key (4), Line (16) from (18)
Is output as one data of the SETUP signal. Further, when the asterisk key (4) is input twice consecutively following the process of step S2, the control unit (13) regards the method as described in c above, and as shown in FIG. The caller's telephone number corresponding to the information indicated by the cursor (11) in the calling side information displayed in 6) is read out from the call number memory (23) or the speed dial memory (22), and the LAPD (18) is read out. ) Line (1)
6) The D channel is output as one data of the SETUP signal. When the other party responds to this call, the information in the designated call number memory (23) is deleted. Note that the display of the calling side information on the display unit (6) will be clear from steps S14 to S16 to be described later, and thus the detailed description is omitted here. When the process in step S12 ends, the process proceeds to step S13. In step S13, it is determined whether the call started based on the calling operation in step S12 has ended.
Specifically, after the step S12 is completed, until the handset (2) is returned to the home position and the hook detector (24) outputs a signal indicating that it is in the on-hook state, this step S12 is performed.
The determination in step 13 is repeated, and when the above signal is detected, the process returns to step S1 to enter a standby state. Returning to step S3, if it is determined that an operation has been performed in this step, the process proceeds to step S14. In this step S14, it is determined whether or not the flag F is "0".
If it is "0", the process proceeds to step S15. S
In step 15, the call information in the call number memory (23) is displayed on the display section (6) as shown in FIG.
In the step, the flag F is set to "1" to indicate that this display is being performed. Thereafter, the process returns to step S1. On the other hand, if it is determined in step S14 that the flag F is not "0", the process proceeds to step S17. In step S17, an operation corresponding to the key whose operation was detected in step S3 is executed. As an example, when the up and down cursor keys (9) and (10) are operated in the display state of the display unit (6) shown in FIG. 1, the cursor (11) on the display unit (6) moves up and down and scrolls up and down. When the keys (7) and (8) are operated, the display on the display (6) is scrolled, and the data in the call number memory (23) is sequentially displayed on the display (6). When the clear key (12) is operated, the call number memory (2) indicated by the cursor (11) on the display section (6).
3) Delete the calling party information in. Thereafter, the process returns to step S1 and enters a standby state.

According to the present invention, the calling telephone number stored in the call number memory at the time of an incoming call is deleted from the memory when the user answers the incoming call, so that the user can answer the call. Only incoming calls that cannot be made can be reliably determined.

[Brief description of the drawings]

FIG. 1 is an external plan view showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a circuit configuration of the embodiment.

FIG. 3 is a schematic diagram illustrating a shortened dial memory according to the present embodiment.

FIG. 4 is a schematic diagram showing a call number memory of the present embodiment.

FIG. 5 is a schematic diagram for explaining call control in an INS network.

FIG. 6 is a flowchart illustrating the operation of the present embodiment.

FIG. 7 is a flowchart illustrating the operation of the present embodiment.

[Explanation of symbols]

 2 Handset 6 Display 9 Up cursor key 10 Down cursor key 13 Control unit 22 Speed dial memory 23 Call number memory 24 Hook detector

Claims (1)

[Claims] 1. A memory means for storing outgoing call information sent at the time of an incoming call, a means for detecting a hook state of a handset, and the outgoing call sent together with the incoming call when there is an incoming call Means for temporarily storing information in the memory means, and thereafter deleting the outgoing call information stored in the memory means based on the detection means detecting that the handset has gone off-hook during the incoming call; A telephone device comprising: