JPS61274599A - Telephone system - Google Patents

Abstract

PURPOSE:To improve operability by displaying the number of a trunk line concerned in a transfer and the number of a terminal to be transferred in a call back displaying. CONSTITUTION:When the trunk line is acquired with operating trunk line selection buttons 61-610 on a key telephone set 1 in which a CPU, etc. is built in, a call is served and also, the number of the trunk line is stored at a memory table in the telephone set 1. And the call is transferred to a requested terminal with operating a ten key 4 and after a prescribed time, the number of the terminal is also stored at the memory table and with on-hooking a telephone receiver 2, the number of the trunk line concerned in the transfer and the number of the terminal to be transferred are displayed on an LCD display part 8 and the call back display where no another asking is necessary is performed and a telephone system of good operability can be realized.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention is capable of transferring a central office line related to incoming and outgoing calls to other terminals within the system, and that even if a predetermined period of time has elapsed since the central office line was transferred, The present invention relates to an improvement in a telephone system (for example, a button telephone device) that displays a call back to a predetermined terminal when another terminal does not respond.

[Technical Background of the Invention] Conventionally, in a key telephone device, a central office line related to outgoing and incoming calls is transferred to another terminal in the following manner.

When a certain key telephone sets a central office line by making or receiving a call, the C
Operate the 0NF key (transfer key) and enter the number associated with the transfer destination button telephone using the dial keys. In this state, when the transfer source key telephone goes on-hook, a call is made to the transfer destination key telephone. As a result, the above-mentioned office line is put on hold, and a special display is displayed on the display (LED) associated with the office line key corresponding to the above-mentioned office line provided on the transfer destination key telephone. This allows the transfer destination key telephone to know that the central office line has been transferred. The key operations on the transfer source button telephone in the above operation are shown in FIG. 7, and the connections between the button telephone and the central office line are shown in FIGS. 8 (a) and (b).
, (d), respectively.

Even though the central office line transfer was performed as described above,
If there is no response on the forwarding destination key telephone or other key telephone in the system within a predetermined period of time after the transfer to the central office line, a call return display (transfer A special flashing of the LED in response to the central office line is performed (FIG. 8(C)).

When performing such a call return display, if the button telephone on which the call return display is performed is equipped with a display device (LED, LCD, etc.) that can display letters and numbers, the 9th As shown in the figure, the station line number related to the transfer was displayed. FIG. 9 shows that the central office line with central line number 1 is displayed as a callback.

[Problems with the Background Art] In such a button telephone system, there is a problem in that when a call is returned, only the number of the central office line related to the transfer is known, but it is not possible to know to which terminal the call was originally transferred. Oh. For this reason, when a call back is displayed, the terminal on which the call back was displayed will either capture the telephone line and ask the other party who is calling, or the caller will be asked to confirm the telephone line before transferring the call. It was a hassle to have to make a note of what information should be forwarded to. In particular, for those who work in the exchange business, there are many opportunities to transfer central office lines, and there are often multiple call-back displays, so it is important to make inquiries and notes like the ones above one by one. It was very inconvenient.

[Object of the Invention] The present invention was made in view of the above-mentioned drawbacks of the conventional telephone system, and its purpose is to display the number of the central office line to which the call was transferred when the call was returned. To provide a more user-friendly telephone system by displaying terminal numbers on a display.

[Summary of the Invention] Therefore, in the present invention, the above-mentioned method is provided in the storage means for storing the number data of the central office line and the number data of the forwarding destination terminal related to the incoming and outgoing call, and the display of the predetermined terminal where the call return display is performed. The above object is achieved by configuring a telephone system by providing a control means for displaying the corresponding 8-line number and terminal number based on the number data stored in the storage means.

[Embodiment of the Invention] FIG. 2 is a block diagram of an embodiment of the invention. In the figure, 100 indicates the main device, and 1011 to 1011
Tl indicates a button telephone having the same configuration as the key telephone 1 in FIG. 2, and 1021 to 102 indicate central office lines. The button telephones 1011 to 101m are the main device 100
It is connected to the button telephone interfaces 1031 to 103□ within. Button phone interface 1031
~103IIl includes 1 ~ lance 1061 for voice transmission.
~106Ill and 1~Lance 1071 for data transmission~
107m, cross points 1081-108m connected to transformers 1061-106IIl, and hybrid circuits 1091-109m connected to transformers 1071-107IIl. On the other hand, the office line interfaces 1041 to 104. dial circuit 11
0 to 110, incoming call detection circuits 1111 to 111゜n, and voice transmission transformers 1121 to 112o connected to dial circuits 1101 to 110o. 115 indicates a DC-DC converter tone generation circuit. This DC-DC converter/tone generation circuit 115 includes a tone generation source 116 for holding tone, ring tone, etc.
Amplifier 117, these tone generation sources 116, and amplifier 1
A cross point 118 connected to 17 is provided. DC-DC converter tone generation circuit 115
is supplied with DC voltage from an external power supply 119. 120 indicates a main control section. The main control unit 120 is composed of a so-called microcomputer, and includes a CPU 121 and a ROM 123 . RAM124, ■10 ports 125
, 126. CP tJ 121 is R0M123. Each part is controlled based on programs and data in the RAM 124. Cp U 121 is I
Hybrid circuit 109 through 10 ports 125
109, and transmits and receives data between the button telephones 1011m to 101m. Also, Cp
U 121 connects cross points 1081 to 108 II via I10 port 126 and data highway 127.
l.

118. Dial circuits 1101-110, , incoming call detection circuits 1111-111. It is connected to, receives necessary data from these, and also provides necessary data to them. Also, cross points 1081-108 m, 11
The 8° transformers 1121 to 112o and the amplifier 117 are connected to each other by an audio line 128.
Tones, the speaker's voice, etc. are transmitted through the 28.

In such a button telephone device, +24 V +12
A DC voltage of +5V is applied to enable each part to operate. The CPU 121 includes incoming call detection circuits 1111 to 1.
11n to data highway 12γ, I10 port 12
6 receives the incoming call data, and based on the data of the incoming telephone number in the ROM 123, the cross points 1081 to 1081
108II11118, and sends the ring tone to the corresponding button telephone. Hybrid circuit 1091-109□, transformer 1011-1
07m, data is sent to the LED of the corresponding station line of the key telephone to display a predetermined display. After receiving a response from the button telephone, crosspoint 1081~ioa
m and iig to form a communication path, and further close the communication path when the call ends. In addition, the data that changes the LED display of the relevant button telephone can be sent to I10 port 1.
25.

The CP tJ 121 performs the same control as above to control calls between extension lines, control outgoing calls to the central office line, and the like. When calling from a central office line, CP (J121 is I10 port 12)
6 sends dial data to dial circuits 1101 to 110n. As a result, the dial circuits 1101 to 110
A dial signal is sent from o.

Next, the button telephone 1 shown in FIG. 3 will be explained. As mentioned above, the button telephones [1011 to 101111 and this button telephone 1 are the same. The button telephone 1 is equipped with a handset 2, a dial keypad 4 in the center of the main body 3, and below it a function key 5 consisting of a transfer key 〇〇NF and a hold key HOLD. There is. Furthermore, on the right side of the main body 3, ten buttons 61 to 610 used for specifying various functions are provided in a vertical line, and ten LEDs 71 to 710 are provided in a vertical line corresponding to the buttons 61 to 610. It is being Button 61o
button 69 for flash (instantaneous on-hook), button 69 for rejecting calls, buttons 63 to 6. button 6 to select the station line.
1o can be used for extension selection.

Furthermore, an LCD 8 is provided at the top of the main body 3 and is capable of displaying 12 characters and numbers horizontally.

FIG. 4 shows the circuitry of the button telephone 1 excluding the audio-related circuitry. Reference numeral 10 indicates a control section composed of a one-chip microcomputer. A transmission data line 11 is connected to the control unit 10, and function keys 5 and buttons 61 to 6 are connected to the control unit 10.
Operation data of 1o is sent to unit 1@ioo via transmission data line 11. In addition, the LED from the main device 100
When the display data for the LCD 8 is sent, the control unit 10 controls the LED 71.
~710 lighting/extinguishing control, L for driver 12
Controls the display of CD8.

Further, the RAM 124 of the main control unit 120 of the main device 100 is provided with a memory table 20 as shown in FIG. This memory table 20 includes a status column 21, a transfer destination terminal number column 22, and a timer value F! 23 and the transfer source terminal number field? 4 is the station line number C, 101 to C1
010 are provided. This status 1i 121 includes statuses (01) and (01) indicating that the central office line has been transferred, a call return status, and a call termination status, respectively.
11), (00) and stored. In the example of FIG. 5, it is shown that 10 seconds have elapsed since the central office line with central line number C101 was transferred from the key telephone with terminal number 10 to the key telephone with terminal number 15.

Further, the ROM 123 of the main control unit 120 of the main device 100 stores a program for controlling callback display as shown in FIG. 1, and the CP tJ 121 operates based on this program.

Next, the control operation in this embodiment will be explained.

In a button telephone with terminal number 10, central line number C10
When the button 610 corresponding to No. 1 is operated, the control circuit 10 shown in FIG.
Send to U 121. Upon receiving this data, the CPU 121 determines the service class (
Refer to the data (indicating whether the use of the office line with the office line number C101 is permitted), and if it is possible to use it, control the cross point and the state where the above-mentioned button telephone has captured the office line with the office line number C101. shall be. Next, it is assumed that dial data is input, and it becomes possible to talk between the key telephone and the other party via the office line. At this time, suppose that a call is possible using the key telephone, but a request is made to transfer the central office line to the key telephone with terminal number 15. Then, as shown in FIG. 7, operate the transfer key Co-NF and press the "1" key and the "5" key to specify terminal number 15 using the dial keypad 4.
Go on-hook after operating a key. Then, these data are taken into CPU 121 and CP tJ 12
1 controls the cross point to transfer the office line with the office line number C101 to the key telephone with the terminal number 15, and displays a call to this key telephone and sends a hold tone to this office line. Furthermore, the CPU 121 has a RAM 12
The memory table 20 in 4 is rewritten as shown in FIG. Along with such operations, the CPU 121 executes the program shown in the flowchart shown in FIG. First, CPt
J121 sets i=1 in a counter (register) in order to search the memory table 20 for all station lines (201). Next, it is detected based on the status whether the office line with the office line number indicated by the counter has been transferred or not (202). If it has been transferred, the timer value 23 is referred to and It is detected whether the transfer destination terminal does not respond even after the elapsed time (203). Here, if a predetermined period of time has elapsed and the timeout has occurred, the CPU
121 refers to the transfer destination terminal number field 22, transfer source terminal number column 24, and office line number, and sends transfer destination terminal number data and office line number data as display data to the transfer source terminal (204). .

This display data is received by the control section 10 shown in FIG. 4, and the control section 10 controls the driver 12 to display the transfer destination terminal number and station line number on the LCD 8 as shown in FIG. At this time, since the CPU 121 also sends the data for the callback display to the transfer source terminal, the corresponding key telephone set also displays the conventional callback display. Furthermore, C.P.
U 121 increments the counter (205) and repeats the above operation until the counter value exceeds the total number of station lines (206).

In this way, in this embodiment, when the forwarding destination terminal does not respond even after a predetermined period of time has passed after the central office line is transferred, a callback message is displayed, and the central office line number of the central office line related to the transfer and the forwarding destination terminal are displayed. The terminal number is displayed on the display (LCD) of the terminal that is being called back, making it clear to whom (to which terminal) the transfer could not be made.

In the embodiment, the explanation was limited to the case where the transfer destination terminal does not respond to the transferred station line, but when the other terminal does not respond to the transferred station line, the above-mentioned call return display and transfer are performed. The destination terminal number and office line number are displayed. Additionally, there are systems in which the call return display is performed on a predetermined terminal (for example, an exchanger's terminal) in addition to the transfer source terminal; in this case, the transfer destination terminal number and office line number are displayed on the predetermined terminal. Do it like this.

Furthermore, after detecting whether or not the terminal to be displayed as a callback has a display device capable of displaying characters and numbers (by a search using a memory table), the display may be performed if applicable.

[Effects of the Invention] As explained above, according to the present invention, it is possible to know the number of the station line related to the transfer and the number of the terminal to which the transfer should have been made when displaying the call return, and It is convenient and easy to use when responding.

[Brief explanation of the drawing]

FIG. 1 is a flowchart for explaining the operation of an embodiment of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention,
3 is a diagram showing the main part of FIG. 2, FIG. 4 is a circuit block diagram of the main part of FIG. 3, FIG. 5 is a diagram showing a memory table used in an embodiment of the present invention, and FIG. Figure 7 shows a display example according to an embodiment of the present invention, Figure 7 shows key operations for central line transfer, Figure 8 shows central line transfer and call return display, and Figure 9 shows a conventional example. FIG. 2 is a diagram illustrating an example of a display that is displayed when a callback is displayed in the telephone system of . 1, 1011~101m...button telephone 8...
LCD 10...Control unit 11...Transmission data line 12...Driver 20...Memory table 120...Main control circuit 121...CPU
123...ROM124...RAM Agent Patent attorney Book 1) Takashi No. 11! 1 No. 2 Agony No. 3 Jm Figure 5 Figure 6

Claims (1)

[Claims] In a telephone system that is capable of transferring a central office line related to an outgoing/receiving call to another terminal in the system, and displaying a callback message to a predetermined terminal when the forwarding destination terminal does not respond after a predetermined period of time, the outgoing/receiving call is storage means for storing the number data of the central office line and the number data of the transfer destination terminal, and a display of the predetermined terminal where the call return display is performed, based on the number data stored in the storage means, 1. A telephone system comprising a control means for displaying a corresponding office line number and terminal number.