JP2002262323A - Key telephone system and method for relaying its incoming call - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology by which relay of a telephone call can be attained quickly. SOLUTION: A telephone set B2 replies an incoming call request from a station line A1 to a telephone set B1. A channel switch circuit control section 13 detects this reply and connects a channel switch circuit 11 so that the telephone set B1 can monitor a speech between the station line A1 and the telephone set B2. A user of the telephone set B1 hears the speech between the station line A1 and the telephone set B2 to understand the meaning of the speech of the user of the station line A1. Then a user of the telephone set B2 depresses a function button to allow the channel switch circuit 11 to interconnect the telephone sets B1, B2 in two-way such that the telephone set B1, B2 can monitor voice from the user of the station line A1. The user of the telephone set B2 confirms the user of the telephone set B1 for intention of the speech and transfers the speech with the user of the station line A1 to the telephone set B1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a key telephone system, and more particularly, to a key telephone system for making a call connection without temporarily holding a call.

[0002]

2. Description of the Related Art In a key telephone apparatus of the prior art, a responder other than the called party once answers an incoming call, and when the responder relays a call to the called party, the responder responds to the called party. If it is not possible to determine whether or not to transfer the call, the call that has been answered is temporarily held, the caller's requirements are communicated to the callee, the callee's will is confirmed, and then the call is transferred. I have.

[0003]

However, such a conventional key telephone apparatus has a problem in that it is not possible to perform the transfer promptly since the answering call is temporarily held when the transfer is performed.

[0004] An object of the present invention is to solve the above-mentioned conventional problems and to provide a technique capable of promptly performing a transfer without temporarily holding a answered call.

[0005]

SUMMARY OF THE INVENTION A key telephone system according to the present invention is a key telephone system accommodating a plurality of telephone lines and a plurality of telephones. When a telephone that has not received a call responds on behalf of the incoming call, a two-way communication path is established between the office line and the telephone that answered the call, and two-way communication is performed using the established two-way communication path. In order to monitor a call, a telephone for which a call is requested is connected to the established two-way communication path, and then a new two-way communication path is established between the central office and the requested telephone. I do.

Further, the key telephone system of the present invention accommodates a plurality of office lines and a plurality of telephones including a first telephone and a second telephone, and connects a communication path between these office lines and the telephone. In a key telephone system having a main device
The telephone includes a display unit that displays incoming call information, a unit that performs a proxy response to an incoming call from an office line, a unit that sends a plurality of communication path switching instructions for switching and connecting a communication path, Means for sending a transfer instruction for transfer, wherein the main device displays an incoming call request from the office line to the first telephone on the display means of the plurality of telephones to notify the display. Notifying means, the second telephone notified of the incoming call request by the notifying means, substitutes for the first telephone, makes a proxy response to the incoming call request, and a proxy response recognizing means for recognizing the proxy response; When the proxy response is recognized by the response recognition means, a first two-way communication path is established between the office line and the second telephone, and the first telephone is monitored to monitor a two-way communication by the first two-way communication path. First
Means for connecting the monitor to the two-way communication path, and when the user of the second telephone transmits a first communication path switching instruction from the second telephone to confirm the user's call request, In response to the 1-channel switching instruction, a second two-way channel is established between the first telephone and the second telephone connected to the monitor, and the voice transmitted from the central office is transmitted to the first telephone and the second telephone. Means for unidirectionally connecting an office line to a second two-way communication path so that a user can receive a call, and a transfer instruction from the second telephone after the user of the second telephone confirms the call request of the user of the first telephone. , When receiving this transfer instruction,
Means for establishing a third two-way communication path between the central office line and the first telephone.

Further, the key telephone system of the present invention comprises:
A key telephone system that accommodates a plurality of office lines connecting telephone terminals and a plurality of telephones including a first telephone and a second telephone, and includes a main device that connects a communication path between these office lines and the telephones In the telephone, display means for displaying incoming information, means for proxy response to incoming calls from the office line,
Means for sending a plurality of call path switching instructions for switching connection of the call path, and means for sending a transfer instruction for transferring a call that has received a proxy response, wherein the main device is Notification means for displaying and notifying an incoming request requesting an incoming call to one of the plurality of telephones on the display means of the plurality of telephones; and a second telephone notified of the incoming call request by the notifying means replaces the first telephone. A proxy response recognizing means for performing a proxy response to the incoming call request and recognizing the proxy response; and when the proxy response is recognized by the proxy response recognizing means, a first bidirectional communication between the office line and the second telephone. Means for establishing a communication path and monitoring and connecting the first telephone to the first two-way communication path for monitoring two-way communication via the first two-way communication path; Check the user's call preference When transmitting the first communication path switching instruction from the second telephone, receiving the first communication path switching instruction and establishing the second bidirectional communication path between the first telephone and the second telephone connected to the monitor. Means for unidirectionally connecting the office line to the second two-way communication path so that the first telephone and the second telephone can receive the transmission voice from the office line; To notify the user of the telephone terminal connected to the second telephone that the first telephone can be transferred to the second telephone.
When the communication path switching instruction is transmitted, the second communication path switching instruction is received, and the first two-way communication path is re-established between the office line unidirectionally connected to the second two-way communication path and the second telephone. Means for establishing a monitor connection of the first telephone to the first two-way communication path again, and a transfer instruction from the second telephone after the user of the second telephone confirms the call request of the user of the first telephone. Receiving the transfer instruction, and establishing a third two-way communication path between the office line and the first telephone.

[0008] The present invention also provides a method for relaying an incoming call in a key telephone system in which a plurality of office lines and a plurality of telephones are accommodated. Responding to an incoming request to one of the plurality of telephones by a telephone that has not been requested to receive an incoming call, and establishing a two-way communication path between the central office line and the telephone that answered the incoming call. Monitoring the two-way communication path through the two-way communication path, and monitoring and connecting the incoming-requested telephone to the two-way communication path; Establishing a communication path.

[0009] Further, the incoming call routing method of the key telephone system according to the present invention accommodates a plurality of office lines and a plurality of telephones including a first telephone and a second telephone. An incoming call routing method for relaying an incoming call in a key telephone system including a main unit for connecting a communication path, wherein a notification for notifying a plurality of telephones of an incoming call request for receiving an incoming call from a first telephone from an office line. Step, the second telephone notified of the incoming call request by the notifying step substitutes for the first telephone instead of the first telephone, and a proxy response recognition step of recognizing the proxy response by the second telephone. When the proxy response is recognized in the proxy response recognition step, the local line and the second
A first two-way communication path is established between the telephone and the telephone, and a first two-way communication path is monitored to monitor the two-way communication through the first two-way communication path.
A step of connecting the telephone to the first two-way communication path by a monitor, and a step of operating the second telephone so that the user of the second telephone operates the second telephone in order to confirm the call request of the user of the first telephone. Transmitting a first communication path switching instruction, and receiving a first communication path switching instruction from a second telephone, and establishing a second bidirectional communication path between the first telephone and the second telephone connected to the monitor. Establishing the one-way connection of the office line to the second two-way communication path so that the first telephone and the second telephone can receive the transmission voice from the office line; and After confirming the call request of the user of the one telephone, operating the second telephone causes the second telephone to transmit a transfer instruction, and receiving the transfer instruction from the second telephone, Steps for establishing a third two-way communication path with the telephone And having a flop.

[0010] In addition, a method for receiving calls in a key telephone system according to the present invention accommodates a plurality of office lines connecting a telephone terminal and a plurality of telephones including a first telephone and a second telephone. In a button telephone system having a main device for connecting a communication path between a telephone and a telephone, a method for relaying an incoming call, the method comprising the steps of: A notification step of notifying a telephone, the second telephone notified of the incoming request by the notification step substitutes the first telephone for a proxy response to the incoming request, and recognizes a proxy response by the second telephone. When the proxy response is recognized by the proxy response recognition step and the proxy response recognition step, a first two-way communication path is established between the office line and the second telephone. A step of connecting the first telephone to the first two-way communication path to monitor the two-way communication through the two-way communication path; and a step of allowing the user of the second telephone to confirm the call request of the first telephone user. Operating the second telephone so that the second telephone transmits a first communication path switching instruction; and receiving the first communication path switching instruction from the second telephone, and the first telephone connected to the monitor. A second two-way communication path is established between the first telephone and the second telephone, and the office line is unidirectionally connected to the second two-way communication path so that the transmission voice from the office line can be received by the first telephone and the second telephone. The step of connecting, and the user of the second telephone is provided with a first terminal by the user of the telephone terminal connected to the central office.
By operating the second telephone to signal that it is possible to relay the telephone, the second telephone
Transmitting a second communication path switching instruction; and receiving a second communication path switching instruction from the second telephone set, and transmitting a second communication path switching instruction between the office line unidirectionally connected to the second bidirectional communication path and the second telephone set. (1) Reestablish the two-way communication path and connect the first telephone to the first
After the step of connecting the monitor to the two-way communication path again, and the user of the second telephone confirming the call request of the user of the first telephone, by operating the second telephone, the second telephone issues a transfer instruction. Transmitting, and receiving a transfer instruction from the second telephone, establishing a third two-way communication path between the office line and the first telephone.

[0011]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

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

Referring to FIG. 1, a key telephone system 1 according to the present invention comprises station lines A1,..., An and telephones B1,.
n and a main device 10.

Station lines A1,..., An are lines for the key telephone system 1 to communicate with a telephone terminal (not shown) accommodated in an external communication system (not shown). The main unit 10 is connected to the main unit 10 through the paths RK1,..., RKn and the audio output paths TK1,.

The telephones B1,..., Bn are provided with a voice input path R1,..., Rn for receiving and a voice output path T for transmitting.
1, to Tn are connected to the main device 10.

Each of the telephones B1,..., Bn has at least a handset and a hands-free communication function unit. The hands-free call function unit is equipped with a microphone for transmitting, separate from the handset (handset),
It has monitoring means for monitoring reception, for example, a speaker, and has a function of making a call using a microphone and monitoring means (speaker) while the handset (handset) is left on the telephone.

Each of the telephones B1,..., Bn has a plurality of function buttons for selecting one of a plurality of functions of the telephone, and registers a continuous button operation to these function buttons. It has a function to execute a function with one touch. The telephones B1,..., Bn are provided with a proxy response function for responding to an incoming call to a telephone designated in advance by a user pressing a function button, a communication path switching function for switching a communication path of the main device 10, and a telephone call monitoring function. And a call monitoring function.

The telephones B1,..., Bn
It has an LED button which is a display unit for displaying the states of 1,..., An and the states of the telephones B1,..., Bn, and displays an incoming call to any of the telephones B1,. I do.

The main unit 10 includes a communication path switch circuit 11
, A bridge circuit 12, and a communication path switch circuit control unit 1.
3 and a control line 16.

The communication path switch circuit 11 switches communication paths.

The bridge circuit 12 has a voice input path CR1,
, CRn and the voice output paths CT1,..., CTn are connected to the communication path switch circuit 11, and for a conference call, the voices from the voice input paths CR1,. Output to each of CTn.

The call path switch circuit control section 13 has a call monitor control section 14 and a call path switch control section 15.

The call path switching control unit 15 includes a telephone B1,
, Receiving the control signal from Bn via the control line 16,
The communication path switching circuit 11 is controlled so as to switch the communication path by the control signal.

The call monitor control unit 14 monitors the call and stores the connection state of the call path switch circuit 11. Next, the operation of the embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a flowchart of the operation.
FIG. 4 is a diagram illustrating a connection state of a communication channel during call monitoring, FIG. 4 is a diagram illustrating a connection state of a communication channel when a callee's intention is confirmed, and FIG.

The operation will be described mainly with reference to FIGS. 2, 3, 4 and 5 and also with reference to FIG. 1.

First, there is an incoming call from the telephone terminal connected to the office line A1 to the telephone B1.
The operation in the case where the user performs a response operation with the telephone B2 and transfers to the telephone B1 will be described.

When the key telephone system 1 receives an incoming request to the telephone B1 from the telephone terminal connected to the central office A1, the key telephone system 1 notifies the telephones B1,.
Displayed on n LED buttons.

The user of the telephone B2, not the user of the telephone B1, responds to the incoming call request displayed on the LED button from the telephone B2 (step S10).

The telephone B2 which has been operated to respond sends a response signal indicating the response operation to the communication path switch circuit controller 13 through the control line 16.

Upon receiving the response signal from telephone B2, call monitor control unit 14 of communication line switch circuit controller 13 recognizes that telephone B2 has responded to the incoming call from telephone line A1 to telephone B1. .

Next, the telephone call monitor control unit 14
It is checked whether the call monitor function is set to 1 (step S20).

When confirming that the telephone B1 has the telephone monitor function, the telephone monitor controller 14 notifies the telephone line switching controller 15 of the telephone monitor function setting confirmation.

Upon receiving the notification of the call monitor function setting confirmation, the call path switching control section 15
To the communication path connection state shown in FIG. 3 (step S
30). In FIG. 3, the audio output path TK1 and the audio input path CR
1, the audio output path T2 and the audio input path CR2 are connected, the audio output path CT1 and the audio input path RK1 are connected, the audio output path CT2 and the audio input path R1 are connected, and the audio output The road CT3 and the voice input path R2 are connected. By connecting the communication paths in this manner, the central office A
1 is received by a monitor provided in the telephone B1 and a handset of the telephone B2, while the transmitted voice from the telephone B2 is received by the telephone B1.
And a telephone terminal (not shown) connected to the office line A1. That is, the telephone terminal on the office line A1 and the telephone B2 are bidirectionally connected,
The telephone B1 monitors transmission and reception between the telephone terminal on the central office A1 and the telephone B2.

Next, the user of the telephone B2
Then, a voice is transmitted to the user of the telephone terminal on the office line A1 to speak the purpose of the call.

The user of the telephone B2 uses the handset of the telephone B2 and the telephone B1.
Uses the monitor means of the telephone B1 to listen to the purpose of the call from the user of the telephone terminal on the office line A1 (step S40).

The user of the telephone B2 who heard the purpose of the call
The user presses the function button of the telephone B2 to perform a call path switching operation for switching the call path (step S50).

When the telephone B2 is operated by the user to switch the communication path, the telephone B2 transmits a communication path switching signal via the control line 16 to the telephone B2.
It is sent to the communication path switch circuit control unit 13.

When receiving the communication path switching signal from the telephone B2, the communication path switching control section 15 of the communication path switch circuit control section 13 controls the communication path switch circuit 11 to the communication path connection state shown in FIG. S60). In FIG. 4, the connection between the voice output path CT1 and the voice input path RK1 established in the communication path connection state shown in FIG. 3 is disconnected, and the voice output path T1 and the voice input path CR3 are newly connected. I have. By connecting the communication paths in this manner, the transmission voice from the office line A1 can be transmitted from the telephone B1 to the telephone B.
2 and the transmitted voice from the telephone B1 is received by the telephone B2, and the transmitted voice from the telephone B2 is received by the telephone B1. That is, the telephone B1 and the telephone B2 are bidirectionally connected, and the telephone B1 and the telephone B
No. 2 allows two-way conversation and monitoring of voice from the office line A1.

In this connection state, the user of the telephone B2 and the user of the telephone B1 hear the purpose of the call from the user of the telephone terminal on the office line A1, and the user of the telephone B2 contacts the telephone B1. Confirms by voice to the user of the telephone B1 whether the user intends to talk with the telephone terminal on the office line A1, that is, whether or not he / she wants to transfer the call with the telephone terminal on the office line A1. (Step S7
0).

When the user of the telephone B2 obtains confirmation from the user of the telephone B1, the user presses the function button of the telephone B2 and performs a call path switching operation for switching the call path again (step S80).

When the telephone B2 is operated by the user to switch the communication path, the telephone B2 transmits a communication path switching signal via the control line 16 to the telephone B2.
It is sent to the communication path switch circuit control unit 13.

When the communication path switching control section 15 of the communication path switch circuit control section 13 receives the communication path switching signal from the telephone B2, the communication path switch circuit 11 is set to the communication path connection state shown in FIG. 3 (step S90). ). As shown above, the communication path connection state shown in FIG. 3 is a bidirectional connection between the telephone terminal on the office line A1 and the telephone B2, and a bidirectional communication between the telephone terminal on the office line A1 and the telephone B2. This call is monitored by the telephone B1.

Next, the user of the telephone B2 informs the user of the telephone terminal of the central office A1 of the availability of the transfer (step S100).

At this time, the user of the telephone B2 has already
In step S70, the user of the telephone B1
It recognizes whether it wants to transfer a call with one telephone terminal.

When the user of the telephone B2 recognizes that the user of the telephone B1 wants to relay the telephone call with the telephone terminal on the office line A1 (step S110: high), the user of the telephone B2 By pressing the function button of the telephone B2, a transfer operation for transferring a call with the telephone terminal on the office line A1 to the telephone B1 is performed.

The telephone B2 which has been subjected to the transfer operation sends a transfer request signal to the communication path switch circuit control unit 13 via the control line 16.

When receiving the transfer request signal from the telephone B2, the communication path switching control section 15 of the communication path switch circuit control section 13 controls the communication path switch circuit 11 to the communication path connection state shown in FIG. 5 (step S130). ). In FIG. 5, the audio output path TK1 and the audio input path R1 are connected, and the audio output path T1 and the audio input path RK1 are connected using only the communication path switch circuit 11 without using the bridge circuit 12. You. By connecting the communication paths in this manner, the transmitted voice from the telephone terminal on the office line A1 is received by the telephone B1, while the transmitted voice from the telephone B1 is received by the telephone terminal on the office line A1. You. That is, the telephone terminal on the office line A1 and the telephone B1 are bidirectionally connected, and two-way communication between the telephone terminal on the office line A1 and the telephone B2 is possible. At this time, the communication path to the telephone B2 is disconnected.

In step S110, when the user of telephone B2 recognizes that the user of telephone B1 does not wish to transfer the call to the telephone terminal on office line A1 (no in step S110), the user of telephone B2 The user presses the function button of the telephone B2 to perform a call termination operation for terminating the call with the telephone terminal on the office line A1 (step S140).

The telephone B2 operated to end the call transmits a call end signal via the control line 16 to the call path switch circuit controller 1
Send to 3.

The communication path switching control section 15 of the communication path switch circuit control section 13 disconnects all communication paths of the communication path switch circuit 11 (step S150).

As described above, according to the present invention, a responder other than the called party can temporarily answer the incoming call and transfer the call to the called party.

Next, a description will be given of the operation in the case where it is not possible to specify which telephone is receiving a general incoming call from the telephone terminal on the central office.

In FIG. 1, the user of the telephone B2 answers a general incoming call from the telephone terminal on the office line A1.

The user of the telephone terminal on the office line A1 is the telephone B
A request is made to the user of the telephone B2 for the transfer to the first user.

The user of the telephone B2 who has received the request performs the call monitor operation by pressing the function button of the telephone B2.

The telephone B2 operated by the call monitor sends a call monitor request signal requesting a call monitor to the communication path switch circuit control unit 13 through the control line 16.

Upon receiving the call monitor request signal from the telephone B2, the call monitor control section 14 of the communication path switch circuit control section 13 controls the call path switch circuit 11 to the call path connection state shown in FIG. Telephone terminal of telephone line A1 and telephone B
2 is bidirectionally connected, and the telephone B1 monitors a telephone call between the telephone terminal on the office line A1 and the telephone B2.

Thereafter, from step S40 to step S40
It operates in accordance with 130 to transfer a call with the telephone terminal on the office line A1 to the telephone B1.

[0060]

As described above, according to the present invention, a responder other than the called party once answers an incoming call generated by the key telephone apparatus, and the called party can answer the incoming call without holding the answered call. Since it is configured to confirm the intention of the caller and transfer the call to the called party, there is an effect that the responder can quickly perform the call transfer based on the intention of the called party.

Also, according to the present invention, since the responder and the corresponding receiver can hear the caller's communication purpose at the same time, a communication error and a trouble of transmission can be omitted, and the receiver can transmit from the tone of the transmitter. The effect that the intention of the person can be obtained can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a flowchart of an operation.

FIG. 3 is a diagram illustrating a connection state of a communication path during a call monitoring;

FIG. 4 is a diagram showing a connection state of a communication channel when a callee's intention is confirmed.

FIG. 5 is a diagram showing a communication path connection state after the completion of the transfer.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Button telephone system 10 Main apparatus 11 Communication path switch circuit 12 Bridge circuit 13 Communication path switch circuit control unit 14 Communication monitor control unit 15 Communication path switching control unit 16 Control lines A1, ..., An Office line B1, ..., Bn Telephone

Claims (6)

[Claims] In a key telephone system accommodating a plurality of office lines and a plurality of telephones, an incoming call request from any office line to any one of the plurality of telephones is not made. When the telephone responds by proxy, a two-way communication path is established between the central office line and the telephone responding on behalf of the telephone. A key telephone system, wherein a monitor connection is made to an established two-way communication path, and then a new two-way communication path is established between the central office line and the telephone set for which a call is requested. 2. A key telephone system which accommodates a plurality of office lines and a plurality of telephones including a first telephone and a second telephone, and comprises a main unit for connecting a communication path between these office lines and the telephones. , The telephone has a display means for displaying incoming information, a means for performing a proxy response to an incoming call from an office line, a means for transmitting a plurality of communication path switching instructions for switching connection of a communication path, and a proxy response. Means for sending a transfer instruction for transferring an incoming call, wherein the main device displays an incoming request from the central office line requesting an incoming call to the first telephone on the display means of the plurality of telephones. Notifying means for notifying, and the second telephone notified of the incoming call request by the notifying means substitutes for the first telephone and makes a proxy response to the incoming call request,
A proxy response recognizing means for recognizing the proxy response, and when the proxy response is recognized by the proxy response recognizing means, a first two-way communication path is established between the office line and the second telephone,
Means for monitoring and connecting the first telephone to the first two-way communication path for monitoring the two-way communication through the first two-way communication path;
When the user of the second telephone transmits the first communication path switching instruction from the second telephone in order to confirm the user's call request of the first telephone, receiving the first communication path switching instruction, the monitor connection is performed. A second two-way communication path is established between the first telephone and the second telephone, and the second telephone line is connected to the first telephone so that the first telephone and the second telephone can receive the transmission voice from the central telephone.
Means for one-way connection to the two-way communication path, and after the user of the second telephone confirms the call request of the user of the first telephone,
When transmitting a transfer instruction from the second telephone, the key telephone system includes means for receiving the transfer instruction and establishing a third two-way communication path between the office line and the first telephone. 3. A plurality of office lines for connecting telephone terminals,
Accommodating a plurality of telephones including a telephone and a second telephone;
In a key telephone system including a main unit for connecting a communication path between the central office and the telephone, the telephone includes a display unit for displaying incoming information, a unit for proxy response to an incoming call from the office, A means for sending a plurality of call path switching instructions for switching connection, and means for sending a transfer instruction for transferring the proxy-answered incoming call, the main device,
An incoming call requesting an incoming call to the first telephone from the office line,
Notifying means for displaying and notifying on the display means of the plurality of telephones, the second telephone notified of the incoming call request by the notifying means, substitutes for the first telephone, and makes a proxy response to the incoming call request, When the proxy response is recognized by the proxy response recognition unit that recognizes the proxy response, a first two-way communication path is established between the office line and the second telephone, and the first two-way communication path is established. Means for monitoring and connecting the first telephone to the first two-way communication path for monitoring the two-way communication on the communication path, and the second telephone user for confirming the call request of the first telephone user. When the first telephone channel switching instruction is transmitted from the two telephones, the first telephone channel switching instruction is received, and the first telephone and the second telephone connected to the monitor are transmitted.
Means for establishing a second two-way communication path between the telephone and the one-way connection of the office line to the second two-way communication path so that transmission voice from the office line can be received by the first telephone and the second telephone. To notify the user of the telephone terminal connected to the central office that the user of the second telephone can transfer the first telephone to the telephone terminal. Transmits the second communication path switching instruction from the communication device, receives the second communication path switching instruction, and performs a first two-way communication between the office line unidirectionally connected to the second two-way communication path and the second telephone. Means for re-establishing the connection and monitoring and connecting the first telephone to the first two-way communication path again;
When a transfer instruction is transmitted from the second telephone after confirming the call request of the user of the first telephone, a third bidirectional communication path is established between the office line and the first telephone in response to the transfer instruction. And a key telephone system. 4. A method for mediating an incoming call in a key telephone system accommodating a plurality of office lines and a plurality of telephones, the method comprising the steps of: Responding on behalf of the incoming call request by a telephone that has not been requested;
Establishing a two-way communication path between the telephone and the telephone that has responded on behalf of the proxy, and monitoring and connecting a telephone that has been requested to receive the call to the two-way communication path to monitor the two-way communication through the two-way communication path; A method of receiving a call in a key telephone system, comprising the step of establishing a new two-way communication path between the line and the telephone requested to receive the call. 5. A key telephone system for accommodating a plurality of office lines and a plurality of telephones including a first telephone and a second telephone, and comprising a main device for connecting a communication path between these office lines and the telephones. A method of relaying an incoming call in a method of notifying a plurality of telephones of an incoming call requesting an incoming call to a first telephone from an office line,
The second notification of the incoming call request by the notification step;
A step in which the telephone substitutes for the incoming call request on behalf of the first telephone; a proxy response recognition step for recognizing the proxy response by the second telephone; and a proxy response recognized by the proxy response recognition step. Establishing a first two-way communication path between the central office line and the second telephone, and monitor-connecting the first telephone to the first two-way communication path to monitor the two-way communication by the first two-way communication path; The user of the second telephone operates the second telephone to confirm the call request of the user of the first telephone.
Transmitting a first call path switching instruction by the telephone;
In response to the first communication path switching instruction from the second telephone, a second bidirectional communication path is established between the first telephone and the second telephone connected to the monitor, and the transmission voice from the office line is transmitted to the second telephone. Unidirectionally connecting a central office line to a second two-way communication path so that the first telephone and the second telephone can receive a call, and after the user of the second telephone confirms the call request of the user of the first telephone, By operating the second telephone, the second telephone transmits a transfer instruction, and upon receiving the transfer instruction from the second telephone, establishes a third two-way communication path between the office line and the first telephone. And a step of receiving a call of the key telephone system. 6. A plurality of central office lines for connecting telephone terminals,
Accommodating a plurality of telephones including a telephone and a second telephone;
A method for relaying an incoming call in a key telephone system including a main unit for connecting a communication path between the office line and the telephone, wherein the incoming call request from the office line to the first telephone is received. A notification step of notifying the plurality of telephones, a step in which the second telephone notified of the incoming call request by the notification step substitutes for the first telephone instead of the first telephone, and A proxy response recognition step for recognizing the proxy response;
When the proxy response is recognized by the proxy response recognition step, a first two-way communication channel is established between the central office line and the second telephone, and a first two-way communication channel for monitoring the first two-way communication channel is monitored. A step of connecting the telephone to the first two-way communication path by a monitor, and a step of operating the second telephone in order for the user of the second telephone to operate the second telephone in order to confirm the call request of the user of the first telephone. Transmitting a first communication path switching instruction, and receiving a first communication path switching instruction from a second telephone, establishing a second bidirectional communication path between the first telephone and the second telephone connected to the monitor. Establishing the one-way connection of the office line to the second two-way communication path so that the first telephone and the second telephone can receive the transmission voice from the office line; and To the user of the telephone terminal connected to the line Operating the second telephone so as to notify the telephone terminal that the first telephone can be transferred to the telephone terminal, whereby the second telephone transmits a second call path switching instruction; The second from the second telephone
Upon receiving the communication path switching instruction, the first two-way communication path is re-established between the office telephone line unidirectionally connected to the second two-way communication path and the second telephone, and the first telephone is connected to the first two-way communication path. The second telephone transmits a transfer instruction by operating the second telephone after the step of connecting the monitor to the communication path again and the user of the second telephone confirming the call request of the user of the first telephone. And a step of receiving a transfer instruction from the second telephone and establishing a third two-way communication path between the central office and the first telephone.