JPH05145643A - Telephone set - Google Patents

Abstract

PURPOSE:To attain the talking with parties other than a transfer destination without redialing by providing a call means receiving a selection signal during talking with a transfer telephone function and calling an extension telephone, set to the subject telephone set. CONSTITUTION:Suppose that many call come to an extension telephone set 111 and it is set so that an incoming call to a key telephone set 102 is transferred to a telephone set B. When a telephone set A makes a call to the extension telephone set 111, a control section 109 detects the arrival of a call based on a call signal sent from a station exchange through a line wire #1 according to the setting of telephone transfer, acquires other idle line (line wire #2) to make dialing to the telephone set B. When the telephone set A or B dials to send a control signal to the key telephone set 102 and to call the extension telephone set 111, a DTMF signal reception section 106 receives the signal and sends a call signal to the extension telephone set 111. When the extension telephone set 111 replies the call, the talking by three parties or two parties is attained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer telephone function in a key telephone device, a private branch exchange, a transfer telephone device and the like.

[0002]

2. Description of the Related Art Conventionally, for example, in Japanese Patent Publication No. 2-453, a key telephone device or the like is used to cope with a case of going out.
As shown in Japanese Patent Publication No. 89, when an incoming call is received from an outside line, the outside line is automatically captured and sent to a transfer destination of a preset telephone number, and after the transfer destination responds, the first incoming call is received. It has a transfer telephone function that responds to and connects both parties.

Regarding disconnection of both, line voltage polarity reversal due to transfer destination disconnection, busy tone, line high &
It is equipped with a function to detect the end of a call by monitoring dryness, silence, continuation of time, and the like, and disconnection.

[0004]

However, in the above-mentioned conventional example, after the transfer operation is completed and the calling side and the called side are connected and the call is in progress, the extension connected to the key telephone device or the like. It is not possible to make calls or transfer calls to the telephone. Therefore, for example, when it is not possible to make a call with a necessary party in one transfer, or when it is desired to contact the extension telephone side connected to the relaying telephone device as a result of the call by transfer. However, it is necessary to call again, which is troublesome and has a drawback that communication cost becomes high.

An object of the present invention is to provide a telephone device capable of coping with a call without re-calling it even if a call cannot be made to a necessary party by one transfer.

[0006]

DISCLOSURE OF THE INVENTION The present invention provides a telephone device which relays a transfer by dial operation of a calling side telephone or a called side telephone even during communication after completion of transfer by a transfer telephone function. It becomes possible to call an extension telephone connected to the telephone, and it becomes possible to talk with a party other than the transfer destination without making a call again.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system configuration diagram showing a key telephone device according to an embodiment of the present invention.

In the figure, a main unit 102 accommodates a plurality of extension lines and outside lines and has a line exchange control function, and has a plurality of outside line interfaces 103, a tone generator 104, and a plurality of extension interfaces 105. ,
The DTMF receiving unit 106, the three-way communication circuit 107, the switching unit 108, and the control unit 109 are included.

Each outside line interface 103 accommodates a general subscriber line 101 as an outside line, and controls the outgoing call operation to the outside line 101, the incoming call detection from the outside line 101, and the response operation.

The tone generator 104 sends out various tone signals such as ring back tone and busy tone to the inside and outside lines.

Each extension interface 105 accommodates an extension 110, and controls outgoing / incoming calls and calls from each extension telephone 111.

In this embodiment, the DTMF receiver 106 is
DTM from ordinary telephone 111 connected to extension 110
For receiving the F signal (PB signal) and the external line 101
It is used to receive a control signal composed of a DTMF signal (PB signal) sent from the.

The three-party call circuit 107 is for achieving the function of making a call by three or more parties including an internal and external line.

The exchange section 108 controls the time-division exchange of the PCM voice signal in each section.
Is responsible for the control and monitoring processing of the above-mentioned respective parts, and the memory 119 is for storing the data necessary for the processing.

FIG. 2 is a system system diagram for explaining the transfer telephone function of the key telephone apparatus in this embodiment.

In the figure, two telephones 201 are subscriber telephones accommodated in a central office switch 203 by a subscriber telephone line 202. For convenience of explanation, telephones A,
Let's call it phone B. Also, the key telephone device 102 and the central office switch 203 are connected by a subscriber telephone line 101. Further, the extension telephone 111 and the key telephone device 102
Are connected by an extension 110. The operation method of this system will be described below.

In the system shown in FIG. 2, the extension telephone set 111 is normally used when an incoming call arrives at the key telephone unit 102.
Are operated to respond.

At this point, the telephone of the extension telephone set 111 becomes busy, and the telephone set A is called to the extension telephone set 111 assuming that the memory 119 is set so that the incoming call to the key telephone unit 102 is transferred to the telephone set B. The operation in this case will be described. FIG. 3 is a flowchart showing the flow of processing in this case.

First, in step S301, when the telephone set A makes a call to the extension telephone set 111, the control unit 109 causes the call sent from the central office switch 201 via the outside line # 1 in accordance with the above-mentioned telephone transfer setting. An incoming call is detected by a signal, another vacant outside line (outside line # 2) is captured, and a calling operation is performed to the telephone set B (S302).

Next, the control unit 109 determines whether or not the telephone set B has responded by monitoring the station line voltage reversal due to the response of the other party (S303). When the telephone B does not answer, the continuous arrival of the ringing signal is monitored and it is determined whether the telephone A has abandoned the call on the way (S).
304).

If it is determined that the telephone set A continues to make a call, the process returns to S303 and the response of the telephone set B is monitored. If the telephone A abandons the call midway in S304, the process proceeds to S313, the call to the telephone B is stopped, and termination processing such as line opening is performed.

If the response of the telephone set B is confirmed in S303, the control section 109 responds to the call of the telephone set A and controls the exchange section 109 to connect the communication path to the telephone set B, Further, the voices from the telephones A and B are input to the DTMF signal receiving unit 106 (S30
5). Here, the telephone call between the telephone A and the telephone B is started (S306).

During this call, the control unit 109
The extension telephone 111 by the DTMF signal receiving unit 106.
DTMF signal requesting call of telephone A or B
It is determined whether or not it is received from (S307). here,
When it is not necessary to call the extension telephone 111, the control unit 109 determines whether the telephone A or the telephone B continues the call (S308). If it is necessary to continue, the process returns to S306 and the call is continued.

When it is not necessary to continue the call in S308, the telephone A and the telephone B end the call, the end of the call is detected by the main unit 102, and the disconnection and end processing is performed in S313. Is done.

In step S307, the telephone set A or the telephone set B calls the extension telephone set 111, and when a control signal for calling the extension telephone set 111 is sent to the main unit 102 by dial operation, the DTMF signal receiving section 1
In 06, this is received and a calling signal is sent to the extension telephone 111 (S309).

While the extension telephone set 111 is being called in this manner, the control section 109 keeps the call paths of the respective telephone sets A and B connected to each other, and the tone generation section 1 is connected to both sides.
The ring back tone is transmitted from 04. Alternatively, the tone generator 104 transmits a ringback tone to the telephone that has transmitted the control signal by dial operation, and the tone generator 104 transmits a hold tone to the other telephone. The DTMF signal from each of the telephones A and B is input to the DTMF signal receiving unit 106 in different time slots, and therefore, which telephone sets the DTMF signal is transmitted by identifying which timing the DTMF signal is received. It is possible to identify whether it was.

Next, the control unit 109 determines whether or not the extension telephone 111 responds to the call in S309 (S310). If the extension telephone 111 does not respond, the process returns to S306 again. In addition, this extension telephone 111
Is stopped when the call signal to the extension telephone 111 is stopped by the reception of the control signal from the telephone A or the telephone B or the passage of time by the timer.

Further, in S310, the extension telephone 11
When 1 responds, a call by three parties or two parties becomes possible (S311). Further, it becomes possible to utilize the rich functions possessed by the main device 102 and the extension telephone set 111.

Next, in S312, it is determined whether or not the call is continued. When continuing, the process returns to S311. If it is finished, the process proceeds to S313 and the main device 1
02, disconnection and end processing is performed.

FIG. 4 is a schematic diagram showing a configuration example of a control signal composed of a DTMF signal.

In the figure, the first digit is an identification code, which is added to distinguish whether the control signal is transmitted by the calling side. Further, the second digit is a code for instructing control such as calling start and calling stop. Further, the third digit and the fourth digit are codes indicating the extension number,
The fifth digit is a code for error checking.

The control signal received by the DTMF receiving unit 106 is sent to the control unit 109, and in order to prevent malfunction,
It is determined that the control signals are received when these control signals are received within a certain fixed time and within a certain fixed time interval and that there is no error as a result of the error check.

With the above-described structure, the telephone device of this embodiment can automatically transfer a telephone call received from the outside to another office while the bus is busy, and at the same time, other telephone lines can be transferred. As a result of an office staff answering a phone call, if there is an important message or a message that only the person in charge can understand, do not hang up the phone once and answer the original call while answering the other party. It can be re-transferred to the extension telephone housed in the key telephone device to be handled.
Therefore, it is possible to secure appropriate and prompt responses to customers,
Moreover, it is possible to reduce communication costs. In addition,
In the above embodiments, a specific extension telephone accommodated in the key telephone device is called, but in the key telephone device having abundant functions, all of the plurality of extension telephones are simultaneously called or group telephones are called. It is possible to call a plurality of extension telephones that make up the same line all at once, or to call another predetermined telephone when a particular telephone is not available for a certain period of time.

Further, in the above embodiment, when an incoming call is received, another free outside line is automatically captured and the telephone transfer is executed. However, once the extension telephone answers and answers, then
Hold an incoming call, make a call to a third party using another outside line, and after the third party answers, connect the incoming telephone line and the outgoing telephone line to enable a call between both lines. You may do so. Also in this case, it is possible to call the extension telephone housed in the key telephone device by the DTMF signal transmitted by the dial operation on the calling side or the called side again. Further, in this case, the calling telephone set on hold during the calling of the third party is connected to the DTMF signal receiving section 106, and the calling of the third party is stopped by the DTMF signal sent from the calling telephone set to extend the extension. call.

Further, in S303, when the transfer destination telephone does not respond after a predetermined waiting time has passed during the telephone transfer by the transfer telephone function, a ringing signal is also sent to the extension telephone. As a result, even when the transfer destination is busy, the extension telephone at the relay point can respond and can effectively deal with it. The waiting time in this case can be set by the user of the extension telephone.

Further, the present invention can be applied not only to the button telephone system which is a combination of the main unit and the extension telephone set as described above, but also to the telephone exchange system or the like such as a PBX (Private Branch Exchange). is there.

[0037]

As described above, according to the present invention,
Even during communication after the transfer is completed by the transfer telephone function, the extension telephone connected to the telephone device relaying the transfer can be called by dialing on the calling side or the called side. It is possible to make a call with a party other than the transfer destination without redialing the call, reduce the communication cost, and provide a convenient system.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a communication system provided with the key telephone device of the above embodiment.

FIG. 3 is a flowchart showing the operation of the above embodiment.

FIG. 4 is a schematic diagram showing a configuration of a control signal used in the above embodiment.

[Explanation of symbols]

 101 ... General subscriber line, 102 ... Main device, 103 ... External line interface, 104 ... Tone generating unit, 105 ... Extension interface, 106 ... DTMF receiving unit, 107 ... Three-way communication circuit, 108 ... Switching unit, 109 ... Control unit , 110 ... extension, 111 ... extension telephone, 201 ... general subscriber telephone, 202 ... subscribed telephone line, 203 ... central office switch.

Claims (6)

[Claims] 1. A telephone apparatus having a line control switching device connected to a plurality of external lines and at least one extension telephone connected to the switching device, wherein the switching device has a transfer telephone function. At the same time, the telephone device is provided with a calling means for receiving a selection signal transmitted by a dial operation of a calling side or a called side during communication by the transfer telephone function to call an extension telephone. 2. The method according to claim 1, wherein when the call is transferred by the transfer telephone function, the transfer destination telephone does not respond even after a predetermined waiting time or more,
A telephone device comprising a calling means for sending a calling signal to the extension telephone and a setting means for setting the predetermined waiting time. 3. The method according to claim 1, wherein the extension telephone is being called by the calling means.
A telephone device, wherein ring back tones are transmitted to both lines while the communication paths of the telephones that are communicating by the transfer telephone function are connected. 4. The method according to claim 1, wherein while the extension telephone is being called by the calling means,
Among the telephones that are communicating by the above transfer telephone function, the ringback tone is sent to the telephone line that sent the selection signal for calling the extension telephone, and the holding tone is sent to the opposite line. Characteristic telephone device. 5. A call stopping means for receiving a selection signal transmitted by a dial operation of a calling side or a called side and stopping a calling signal to an extension telephone according to claim 1. Telephone device. 6. A telephone device having a transfer function, comprising a calling means for receiving an selection signal received by a dial operation of a calling side and calling an extension telephone while the transfer destination is called by the transfer function. Characteristic telephone device.