JPH10174134A - Key telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a telephone set side of a transfer destination to confirm at transfer of an incoming call of an external line having a notice function of a caller Id (caller number). SOLUTION: The telephone set containing an external line L having a caller ID notice function and containing a slave set having a display section is provided with a monitor circuit monitoring a polarity change at the arrival of an incoming call to the external line, an external line interface that detects a start signal of the external line when the monitor circuit detects polarity change of the external line, and a reception circuit receiving the caller ID, and a loop of the external line is closed after the detection of a start signal, the external line and the reception circuit are connected and when the caller ID is received by the connected reception circuit, the loop of the external line is open. When the slave set TEL 1 replies the incoming signal reached to the external line and the external line forced transfer operation is conducted, the incoming call is transferred to a transfer destination slave set TEL 2 and the received caller ID is sent to the slave set TEL 2 and displayed on a display section.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key telephone apparatus capable of receiving a caller's telephone number when receiving a call.

[0002]

2. Description of the Related Art In general, a digital switching network such as an ISDN network has a function of notifying a receiving terminal of a caller's telephone number at the time of an incoming call. A telephone number (hereinafter, calling ID) notification service is under consideration. The caller ID notification sequence in such an analog switching network is as follows.
That is, when the caller calls the destination, the exchange first transmits a reversal signal to the terminating terminal via an external line such as a central office line, and transmits a terminal start signal having a frequency of 16 Hz to the external line for a short time. I do. When the receiving terminal detects the reversal signal and the activation signal, closes the DC loop of the external line, and responds primary,
The exchange transmits the calling ID to the receiving terminal by a modem signal.

When the receiving terminal that has received the calling ID releases the DC loop of the closed external line, the exchange determines that the calling ID has been received and the receiving terminal determines that the receiving terminal has received 16 Hz.
Outgoing signal (call signal). Thus, departure I
Since the user can confirm the calling ID in advance when receiving an outside line having the D notification function, it is extremely effective for a prank call or the like.

[0004]

In a key telephone apparatus accommodating a plurality of external lines, when an external line capturing operation is performed on the key telephone side, the external line is captured, and an outgoing call and an incoming call response through the captured external line are performed. Will be In addition, such a key telephone apparatus has an external line transfer function of transferring an incoming call to another key telephone after a key telephone responds to the incoming call upon receiving an external line.

[0005] Even when such a key telephone apparatus accommodates an outside line having the above-mentioned calling ID notification function, it is possible for the transfer source telephone to temporarily respond to the incoming call and transfer the call to the transfer destination key telephone when the call is received. is there. However, if such external line transfer by the transfer source telephone is a forced transfer with the transfer destination telephone, for example, without going through an internal call, the transfer destination key telephone does not know in advance who the transferred call is from. However, there was a problem that the usability was poor. Accordingly, it is an object of the present invention to enable a transfer destination telephone to confirm in advance the source of an incoming call when transferring an incoming call on an outside line having a calling ID notification function.

[0006]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention provides a plurality of telephones which accommodate an outside line having a function of notifying a calling ID indicating a telephone number of a caller and have a display unit. In the accommodated key telephone device, the receiving means for receiving the calling ID, the incoming call is transferred to the transfer destination telephone based on the outside line transfer operation of the telephone in response to the incoming call arriving on the outside line, and the calling received by the receiving means is received. Control means for displaying the ID on the display unit of the transfer destination telephone is provided. Therefore, when a transfer operation is performed by the telephone responding to the incoming call when the outside line is received, the caller ID is displayed on the transfer destination telephone. Further, a calling ID corresponding to the incoming call transferred by the forced transfer operation of the outside line is displayed on the transfer destination telephone. The calling ID displayed on the display unit of the transfer destination telephone is transmitted as display data to the transfer destination telephone based on the transfer operation of the transfer source telephone that has performed the outside line transfer operation. In addition, the key telephone device has a storage area for storing a calling ID for each accommodated outside line.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the telephone device according to the present invention. This telephone device has a plurality of external lines L
1 to Ln and a plurality of key telephones (hereinafter referred to as "child units") TEL1 to TELm, and is a key telephone device for performing an exchange connection between an external line and a child unit or between respective child units.

The main unit 1 of the key telephone apparatus is provided with external line interfaces 111 to 11n connected to the external lines L1 to Ln for detecting an incoming call, capturing an external line, or making a dial call. Is connected to each of the cordless handsets TEL1 to TELm via the line switching circuit 13 and a telephone interface to be described later. Then, the external line interfaces 111 to 11n and the line switching circuit 13 are controlled by the CPU 15, and exchange connection processing between the external line and the child device or between the child devices is performed.

Further, switch circuits 18 and 19 are connected to each of the external lines L1 to Ln, and the output sides of the switch circuits 18 and 19 are connected to the external line state monitoring circuit 12 and the source ID receiving circuit 14, respectively. . Here, the external line state monitoring circuit 11 is a circuit for detecting reversal and reversion of the external line L, and the source ID receiving circuit 14 is configured by a modem.
It receives a calling ID transmitted from an exchange (not shown) via an external line when receiving a call.

That is, this key telephone apparatus accommodates a plurality of external lines L1 to Ln to which a calling ID is notified from the exchange side when receiving an incoming call, and receives the calling ID notified from the plurality of accommodated external lines. By controlling the switch circuits 18 and 19, the source ID can be received by the source ID receiving circuits whose number is smaller than the number of external lines accommodated. Here, when the caller makes a call to the called party, the exchange first sends a reversal signal to the outside line L and sends a terminal start signal of a frequency of 16 Hz for a short time. Then, the CPU 15 controls the switch circuit 18 to connect the external line L1 and the external line state monitoring circuit 12 and detects the external line L via the external line state monitoring circuit 12 in order to detect the reversal from the external line state monitoring circuit 12.
1 is performed. At this time, if the reversal cannot be detected, the switch circuit 18 is controlled next to connect the external line L2 to the external line state monitoring circuit 12, and the reversal of the external line L2 is similarly detected.

The selective connection between each external line L and the external line state monitoring circuit 12 under the control of the switch circuit 18 of the CPU 15 is sequentially performed until a reversal is detected from the external line. Then, when the reversal of the corresponding external line is detected via the external line state monitoring circuit 12, the CPU 15 outputs the terminal activation signal via the incoming detection circuit of the external line interface 11 connected to the relevant external line where the reversal signal is detected. After detecting this, the external line interface 11 is controlled to close the loop of the external line, thereby returning a primary response signal to the exchange. At this time, the CPU 15 controls the switching of the switch circuit 19 so that the external line from which the reversal is detected is connected to the source ID receiving circuit 14.

When the primary response signal is transmitted from the key telephone apparatus side, the exchange side transmits the calling ID to the external line by a modem signal. Then, the calling ID is transmitted to the calling ID receiving circuit 1 connected to the external line via the switch circuit 19.
4 is received. In this case, the CPU 15 inputs the received calling ID from the calling ID receiving circuit 14, stores it in a memory (not shown), and causes the slave unit TEL to display the number. When the reception and input of the calling ID are completed, the loop of the corresponding outside line is released. Then, the exchange judges that the reception of the calling ID has been completed and sends an incoming signal (call signal) to the corresponding external line. Thus, the incoming signal is detected by the CPU 15 via the corresponding external line interface 11. Then, the incoming data is transmitted from the CPU 15 to the child device TE.
Is sent to L, and the child device TEL rings. Here, when any of the slave units TEL responds to the incoming call, the DC loop of the corresponding external line is closed and a secondary response signal is sent to the exchange side, the exchange depolarizes the external line. In this manner, even when a plurality of external lines L1 to Ln for which the calling ID is notified are accommodated, the switching circuits 18 and 19 are sequentially switched and selected, so that the outside line state monitoring circuit 12 and the issuing ID which are less than the number of accommodated outside lines are accommodated. The use of the receiving circuit 14 enables detection of reversal / reversion and reception of a source ID.

FIG. 2 shows an outside line L having a calling ID notification function.
FIG. 11 is a block diagram showing another configuration of the key telephone apparatus accommodating 1 to Ln. In this example, external line status monitoring circuits 121 to 12n are connected to the external lines L1 to Ln, and output ID receiving circuits 141 to 14x, which are fewer than the number of external lines accommodated, are connected to the output side of the circuit switching circuit 13. In this case, when the CPU 15 of the key telephone apparatus detects the reversal by the external line state monitoring circuit 12 corresponding to the incoming of the external line L and inputs a start signal via the external line interface 11,
The DC loop of the corresponding external line is closed, a primary response signal is transmitted, and the circuit switching circuit 13 is controlled to control the corresponding external line L and
A path is connected to a vacant source ID receiving circuit 14 among the D receiving circuits 141 to 14x to generate a source ID from the corresponding external line.
To receive. In this way, the source ID from each external line can be received by the source ID receiving circuits of a number smaller than the number of accommodated external lines having the function of notifying the source ID.

The slave unit TEL connected to the main unit 1
Is a control unit 21, a transmission circuit 22 for transmitting data to and from the main device 1, an external line lamp provided for each external line and a display unit 23 comprising an LCD for displaying a calling ID, a telephone call circuit 24, Function keys 27 such as an outside line key 25, a dial key 26, and a hold key provided near the outside line lamp;
And a hook switch HS.

In the device configured as described above, the CP
U15 is an external line state monitoring circuit 12, an external line interface 1
When the switching signal and the start signal of the outside line L are detected via the communication line 1 and the primary response signal is returned to the exchange side, the circuit switching circuit 13 is controlled as described above, and the outside line and the free calling ID are output.
It connects to the receiving circuit 14 and causes the vacant calling ID receiving circuit 14 to receive the calling ID sent from the exchange. Then, the received calling ID is input and transmitted to the slave unit TEL via the telephone interface 17, and the LC of the display unit 23 of the slave unit is displayed.
D is displayed, and then the loop of the corresponding outside line is released.
Then, the exchange sends an incoming signal to the corresponding outside line. When the incoming signal is detected, the CPU 15 transmits the incoming data to the slave TEL via the telephone interface 17. As a result, in the slave unit TEL, the corresponding outside line lamp on the display unit 23 blinks and a buzzer (not shown) rings.

Next, FIG. 3 is a sequence diagram showing operations of the exchange having such a calling ID notifying function, the main unit 1 accommodating the external lines L1 to Ln for notifying the calling ID, and the slave unit TEL. With reference to this sequence diagram and the block diagram shown in FIG. 2, the call transfer operation showing the main part of the present invention will be described in detail. Note that m main units from the sub units TEL1 to TELm are connected to the main unit 1 of the present apparatus. Here, the incoming call transfer operation among the sub units TEL1 to TELm will be described. Two handset T required above
EL1 and TEL2 are taken as targets, and child unit TEL1
Is described as a transfer source slave unit for transferring an incoming call, and the slave unit TEL2 is described as a transfer destination slave unit to which the incoming call is transferred.

When the caller goes off-hook using the nearest telephone to make a call to the called party, a dial tone is sent from the exchange to the caller. Is sent to the exchange (step S1). Then, the exchange first outputs a reversal signal (polarity reversal) to the outside line L (step S2),
A terminal start signal having a frequency of 1 Hz is transmitted to the external line L (step S3).

In this case, the CPU 15 of the main unit 1 detects the reversal signal and the start signal of the external line L via the external line state monitoring circuit 12 and the external line interface 11, respectively. When each of these signals is detected, the corresponding external line interface 11 is controlled to close the DC loop of the external line L, thereby returning a primary response signal to the exchange (step S).
4). Further, it controls the circuit switching circuit 13 and connects the outside line thereof to the vacant calling ID receiving circuit 14. Upon receiving the primary response signal, the exchange transmits the calling ID to the outside line (step S5). The transmitted ID is the ID
The signal is received by the receiving circuit 14, and the CPU 15 inputs this. When the input of the calling ID is completed, the CPU 15 sends the handset TEL1, T2 through the telephone interface 171 and 172.
The calling ID is transmitted to EL2 and displayed on the LCD of each display unit 23 of the slave units TEL1 and TEL2 (steps S6 and S5).
7).

Then, the reception completion signal is returned to the exchange by releasing the loop of the corresponding external line (step S8). Then, the exchange sends a ring back tone (RBT) to the caller (step S10), and sends a call signal (an incoming signal) to the corresponding outside line (step S10).
9). The CPU 15 of the main device 1 which has detected this calling signal via the corresponding external line interface 11 transmits the incoming data via the telephone interfaces 171 and 172 to the slave unit TEL.
1 and TEL2 (steps S11 and S11).
12). In the slave units TEL1 and TEL2, each control unit 21
Flashes the corresponding outside line lamp on the display unit 23 and makes the buzzer ring.

Each sub-unit T for which an incoming call is notified in this way
When the slave unit TEL1 performs an incoming call response operation by off-hook among the EL1 and TEL2, for example, the control unit 21 of the slave unit TEL1 detects the operation and transmits the operation data to the transmission circuit 2.
2 and transmitted from the transmission circuit 22 to the main device 1 (step S13). When the CPU 15 of the main unit 1 inputs the operation data via the telephone interface 171,
The external line interface 11 is controlled to close the DC loop of the external line L, and a secondary response signal is sent to the exchange (step S14). Further, by controlling the circuit switching circuit 13, the corresponding external line is connected to the telephone interface 171,
The communication path between the external line and the slave unit TEL1 is connected. Further, the external line lamp in-use data is transmitted to each slave unit TEL, the external line lamp is switched from blinking display to lighting display, and ringing is stopped. Furthermore, child machine TE
The display deletion data of the calling ID is transmitted to each slave unit other than L1, and the calling ID displayed on the LCD is deleted.

On the other hand, the exchange which has received the secondary response signal from the main unit 1 performs the reversion of the corresponding outside line and stops the ring back tone to the caller (step S15).
As a result, a call is started between the handset TEL1 and the caller. During such an outside line call, the handset TEL1 is
Transfer request that the user on the side of the terminal wants to make a call with the user of the child device TEL2, and based on this request, the child device TEL
When the hold key in the function key 27 is operated in step 1, the control unit 21 of the slave unit TEL1 transmits the hold operation data to the main device via the transmission circuit 22 (step S1).
6). Then, the CPU 15 of the main device 1
3 to disconnect the communication path between the slave unit TEL1 and the corresponding outside line, and then connect a hold sound circuit (not shown) to the corresponding outside line. As a result, the hold tone from the hold tone circuit is transmitted to the caller through the corresponding outside line and the exchange (step S1).
7). At this time, the CPU 15 transmits the display data to each slave unit TEL so that the lamp of the outside line corresponding to the reserved outside line blinks.

Subsequently, a dial key 26 for designating a transfer destination (slave unit TEL2) of the incoming call to the outside line at the slave unit TEL1.
Is performed and a subsequent forced transfer operation such as an on-hook operation is performed, the control unit 21 of the slave unit TEL1 transmits the forced transfer operation data to the main device 1 via the transmission circuit 22 (step S18). . In this case, the main device 1
CPU 15 transmits forced ringing tone data to slave unit TEL2, which is the transfer destination, to output a forced ringing tone from the buzzer of slave unit TEL2, and the LCD of slave unit TEL1.
To delete the calling ID being displayed, and also transmits the display data of the calling ID to the slave unit TEL2, and
D is displayed (step S19).

When the forced transfer ring tone is output from the handset TEL2, the user of the handset TEL2 notices that the incoming external call has been transferred to himself. In this case, L of the display unit 23
Since the caller ID, which is the source of the external line transfer call, is displayed on the CD, the user of the handset TEL2 can easily identify from whom the call was transferred. And
When a corresponding external key is pressed or an off-hook response operation is performed in order to respond to the transfer call, the control unit 21 of the slave unit TEL 2 detects this and transmits the response operation data via the transmission circuit 22 to the main unit 1. (Step S20).
Then, the CPU 15 of the main device 1 controls the line switching circuit 13 to disconnect the hold tone circuit and the corresponding external line,
Hold release processing is performed to control the communication path between EL2 and the outside line (step S21). As a result, a call is started between the caller and the user of the slave unit TEL2.

As described above, when a call responding to an incoming call to an outside line is transferred to another handset, the calling ID which is the telephone number of the call originating the outside line call is transmitted to the handset of the transfer destination and displayed. It was done. As a result, at the transfer destination slave unit,
Before answering this transfer call, it is possible to easily confirm from whom the call is received. If it is determined that the transfer destination is unnecessary when confirming the caller ID, a predetermined transfer back operation is performed to transfer the call to the transfer source (that is, the slave unit TEL1 in this example). You can go back. At the time of such transfer back, by performing a specific operation, specific data (for example, data indicating absence or in a meeting) is attached to the transfer source and displayed, and when the transfer source answers the transfer back call, A message corresponding to the displayed data may be transmitted to the caller.

On the LCD of the display unit 23 of the slave unit TEL for displaying the calling ID, the calling ID of an outside line that can respond to an incoming call is usually displayed. Here, a plurality of calling IDs are simultaneously notified from the exchange via a plurality of outside lines, and if any of the plurality of responding calling IDs is displayed on the LCD, the user can determine which outside line Of origin ID is LC
D cannot be identified, and there is a problem that confusion is caused when answering an incoming call.

For this reason, each table as shown in FIG. 4 is provided in the memory 16, and the display priority of the calling ID to be displayed on each slave unit TEL is determined. That is, first, FIG.
Is provided in the memory 16 so that the presence / absence of an incoming call and the calling ID can be stored for each local line (external line). Here, if the value of the incoming call state area corresponding to the outside line is "1", the outside line indicates that a call is being received, and the calling ID received from this outside line is stored in the corresponding caller ID area. If the value of the receiving state area is "0", the outside line is not receiving a call, and at this time, the caller ID area indicates that the calling ID is not stored.
.., F are stored.

FIG. 4B shows a caller ID display management table, in which the office line (outside line) of the calling ID displayed on the LCD of the slave unit is stored in correspondence with each slave unit TEL. This table stores the outside line number of the earliest incoming call according to the order of incoming calls. Note that the outside line number in this table can be changed to another outside line number by a change request based on a predetermined operation on the slave unit side, and therefore, the calling number of another outside line can be displayed on the slave unit. In this example, when an incoming call arrives in the order of the outside lines L3 and L1, the slave units TEL1, TEL3,
In TELm, the display of the origination ID of the first-arriving external line L3 is continued, but in the slave unit TEL2, the display of the origination ID of the first-arrival external line L3 is switched to the origination ID of the second-arrival external line L1 in response to the change request. Is shown.

FIG. 4C shows an incoming call priority table, which shows the numbers of the office lines for which the calling ID should be displayed with priority.
This table sets the priority in the order of arrival,
In this table, the calling ID received from the external line L3 that has received the earliest call has the highest display priority, and then the external line L1 that has received the incoming call has the order of “0” in the column of the line number. Indicates that a call is not being received. Note that when a high-priority external line incoming call shown in the table of FIG. 4C is changed to a non-call incoming state (communication state) due to a response or the like, the incoming call of the next priority continues to another external line. In this case, the calling ID of the outside line is displayed on the LCD, and at this time, the caller number display management table of FIG. 4B is rewritten.

By providing such tables, when displaying a plurality of reception IDs, the LCD of each slave unit TEL can be used.
Displays only one caller ID in accordance with the priority such as the order of incoming calls, so that confusion when the user answers the incoming call can be avoided. Also, a plurality of received source IDs are stored in one
, It is also possible to sequentially display a plurality of source IDs one by one in response to the above-described change request based on a predetermined operation. In the above example, each table is provided in the memory 16 of the main device 1. However, similar effects can be obtained by providing such a table in a memory (not shown) of the slave unit TEL.

That is, when an outside line is received, the main unit 1 displays the calling ID received from the outside line together with the number of the outside line and the slave unit TEL.
To the side. Upon receiving the calling ID and the outside line number, the slave unit TEL stores the calling ID corresponding to the outside line number in the table of FIG. 4A and displays the outside line number (display station line number) in the table of FIG. ) Is stored. Then, FIG.
The external number is stored in the incoming call priority table in (c) according to the order of incoming calls, and the received calling ID is displayed on the L of the display unit 23.
Display on CD. At this time, if the number of another external line is already stored in the table of FIG. 4B, the external line number received this time is only stored in the incoming call priority table of FIG. It is not stored in the table of b) and is not displayed on the LCD.

After that, the slave unit responds to an incoming call on the outside line whose calling ID is being displayed on the LCD, or the other handset responds to the incoming call on the outside line. Is transmitted together with the outside line number, the slave unit deletes the calling party ID corresponding to the outside line number stored in the table of FIG. Next, FIG.
Of the incoming call priority table, and the update processing of giving the highest priority to the next caller ID, and then reading out the caller ID to be displayed from the table of FIG. 4A in accordance with the updated incoming call priority table. To display on the LCD of the display unit 23. Then, the outside line number is stored in the table of FIG.

[0032]

As described above, according to the present invention, when a slave unit responding to an incoming call arriving at an outside line having a calling ID notification function at the time of an incoming call performs an outside line transfer operation, the slave unit of the transfer destination is notified. The incoming call is forwarded and the incoming call
Since D is displayed on the display unit of the transfer-destination handset, the transfer-destination handset can easily confirm the source of the external-line call at the time of transfer of the incoming call on the outside line. In addition, since the source of the incoming call transferred by the above-mentioned external line forced transfer operation is displayed on the transfer destination handset, the source can be confirmed in advance even for the suddenly transferred external line incoming call. In this case, the user of the transfer-destination slave unit can return the transfer call to the transfer-destination slave unit without responding to the caller ID if the user confirms the calling ID and determines that the call is unnecessary. Become. In addition, based on the transfer operation of the transfer source slave unit that has performed the external line transfer operation, the received call source ID is transmitted as display data to the transfer destination slave unit and displayed, so that the received call source ID is
Can be accurately displayed on the display unit of the transfer destination slave unit. In addition, since a storage area for storing a calling ID is stored for each outside line accommodated in the telephone device, after receiving each calling ID that simultaneously arrives on a plurality of outside lines upon receiving a call, each incoming call is transferred to each transfer destination child. Even in the case of transfer to a device, the calling ID can be accurately displayed on the display unit of each transfer destination child device.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a key telephone apparatus according to the present invention.

FIG. 2 is a block diagram showing another example of the configuration of the device.

FIG. 3 is a sequence diagram showing an operation of a main part of the device.

FIG. 4 is a table showing a state of incoming calls of each external line accommodated in the above-mentioned device and an incoming call display priority of a slave unit which displays an incoming state of each outside line.

[Explanation of symbols]

1 ... main unit, 111 to 11n ... external line interface, 1
2, 121 to 12n: external line state monitoring circuit, 13: circuit switching circuit, 14, 141 to 14x: source ID receiving circuit, 15
... CPU, 16 ... Memory, 171 to 17m ... Telephone interface, 18, 19 ... Switch circuit, 21 ... Control unit, 22 ... Transmission circuit, 23 ... Display unit (LCD, external line lamp), 24 ... Talk circuit, 25 ... Outline Key, 26 ... Dial key, TEL1-TELm ... Key-phone, L1-
Ln ... outside line.

Claims (4)

[Claims] 1. A key telephone device which accommodates an outside line having a function of notifying a calling ID indicating a telephone number of a caller and accommodates a plurality of telephones having a display unit, a receiving means for receiving the calling ID, Control means for transferring the incoming call to a transfer destination telephone based on an outside line transfer operation of the telephone in response to the incoming call arriving at the outside line, and displaying a calling ID received by the receiving means on a display unit of the transfer destination telephone A key telephone device comprising: 2. The key telephone apparatus according to claim 1, wherein the outside line transfer operation is a forced transfer operation. 3. The calling ID displayed on the display unit of the transfer destination telephone according to claim 1, wherein the calling ID is transmitted as display data to the transfer destination telephone based on the transfer operation of the transfer source telephone that has performed the external line transfer operation. Key telephone device characterized by being performed. 4. The key telephone apparatus according to claim 1, wherein the key telephone apparatus has a storage area for storing a calling ID for each accommodated outside line.