WO2016086730A1

WO2016086730A1 - Call transfer method and device

Info

Publication number: WO2016086730A1
Application number: PCT/CN2015/092331
Authority: WO
Inventors: 张永; 张鹏刚; 张晋; 王一; 李晨浩
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-12-03
Filing date: 2015-10-20
Publication date: 2016-06-09
Also published as: CN105721727A

Abstract

Provided are a call transfer method and device, the method comprising: a voice gateway receives a first call-in instruction of a calling terminal, the first call-in instruction being used to instruct the calling terminal to conduct a voice call with a first called terminal; when the first called terminal is set in a call transfer state, the voice gateway forwards to a second called terminal a second call-in instruction in response to the first call-in instruction; the voice gateway determines whether the second called terminal is a usable terminal; and the voice gateway executes a voice call operation of the calling terminal and the usable terminal according to a determination result, the first call-in instruction and the second call-in instruction. The present invention addresses the problem in the related art that the function of terminal call transfer can only be achieved via a soft switch server or an IP multimedia subsystem (IMS), thus realizing more convenient and flexible terminal transfer, without relying on the soft switch server or the IMS.

Description

Call transfer method and device

Technical field

The present invention relates to the field of communications, and in particular to a method and apparatus for call forwarding.

Background technique

With the development of the times, people's demand for data is expanding. Traditional PSTN voice networks are gradually being replaced by next-generation VoIP networks. The application of home access gateways in network upgrades is becoming more and more common. The access gateway (Access Gateway for short) is located in the edge access layer of the softswitch architecture. The gateway can access the network through DSL, Ethernet, optical fiber, etc., and can also provide an analog subscriber line interface for direct The telephone user accesses the softswitch network.

Call forwarding is a traditional communication service in the telecommunications industry, also known as inbound and outbound. If the call is unanswered or unwilling to answer the call, you can transfer the call to another phone number. The traditional VoIP fixed call implementation must be implemented through a softswitch server or an IP Multimedia System (IMS) server, and the call transfer user also needs to activate this function.

The problem that the function of the terminal call transfer in the related art can only be realized by the softswitch server or the IP multimedia system has not yet proposed an effective solution.

Summary of the invention

A main object of the embodiments of the present invention is to provide a method and apparatus for call forwarding, so as to at least solve the problem that the function of terminal call forwarding in the related art can only be implemented by a softswitch server or an IP multimedia system.

According to an aspect of the present invention, a method for call forwarding is provided, comprising: a voice gateway receiving a first incoming call instruction of a calling terminal, wherein the first incoming call instruction is used to indicate the calling terminal Performing a voice call with the first called terminal; when the first called terminal is set to the call forwarding state, the voice gateway forwards the second incoming call command in response to the first incoming call instruction to the second a called terminal; the voice gateway determines whether the second called terminal is an available terminal; the voice gateway performs the main according to the determination result, and according to the first incoming call instruction and the second incoming call instruction The voice call operation of the terminal and the available terminal is called.

Optionally, the voice gateway forwards the second incoming call command to the second called terminal in response to the first incoming call instruction, where the voice gateway sends a first message to the calling terminal, where The first message is used to indicate that an incoming call operation of the calling terminal is maintained; and the voice gateway sends the second incoming call instruction to the second called terminal.

Optionally, the determining, by the voice gateway, whether the second called terminal is an available terminal includes: when the second called terminal is in a call normal state, the voice gateway determines that the second called terminal is available a terminal; when the second called terminal is in a call abnormal state, the voice gateway determines that the third called terminal is an available terminal, wherein the third called terminal is in a call normal state.

Optionally, when the second called terminal is in a normal call, performing the voice call operation of the calling terminal and the available terminal according to the first incoming call instruction and the second incoming call instruction includes: The voice gateway establishes a communication link between the second called terminal and the calling terminal according to the second incoming call instruction; the voice gateway activates the incoming call operation of the calling terminal; The voice gateway performs a voice call operation of the calling terminal and the second called terminal according to the link and the first incoming call instruction.

Optionally, after the second called terminal is in a call abnormal state, the voice gateway forwards the second incoming call command in response to the first incoming call instruction to the second called terminal, and further includes: The voice gateway forwards the second incoming call instruction to the third called terminal.

Optionally, performing the voice call operation of the calling terminal and the available terminal according to the first incoming call instruction and the second incoming call instruction, including: the voice gateway according to the second incoming call instruction Establishing a link between the third called terminal and the calling terminal; the voice gateway activating the incoming call operation of the calling terminal; the voice gateway is configured according to the first incoming call and The second incoming call instruction performs a voice call operation of the calling terminal and the third called terminal.

According to another aspect of the present invention, a call forwarding apparatus is provided, which is located at a voice gateway, and includes: a receiving module, configured to receive a first incoming call instruction of a calling terminal, wherein the first incoming call instruction And the forwarding module is configured to: when the first called terminal is set to the call forwarding state, respond to the first incoming call instruction The second incoming call instruction is forwarded to the second called terminal; the determining module is configured to determine whether the second called terminal is an available terminal; the executing module is set to be based on the determination result, and according to the first incoming call instruction and The second incoming call instruction performs a voice call operation of the calling terminal and the available terminal.

Optionally, the forwarding module includes: a first sending unit, configured to send a first message to the calling terminal, where the first message is used to indicate that an incoming call operation of the calling terminal is maintained; And two sending units, configured to send the second incoming call instruction to the second called terminal.

Optionally, the determining module is configured to: when the second called terminal is in a call normal state, determine that the second called terminal is an available terminal; and when the second called terminal is in a call abnormal state Determining that the third called terminal is an available terminal, wherein the third called terminal is in a normal call state.

Optionally, when the second called terminal is in a normal call, the executing module includes: a first establishing unit, configured to establish, according to the second incoming command, the second called terminal and the calling party Communication chain between terminals a first activation unit configured to activate the incoming call operation of the calling terminal; a first execution unit configured to execute the calling terminal and the location according to the link and the first incoming call instruction The voice call operation of the second called terminal is described.

Optionally, when the second called terminal is in a call abnormality, the forwarding module is further configured to: forward, by the voice gateway, the second incoming call instruction to the third called terminal.

Optionally, the executing module includes: a second establishing unit, configured to establish a link between the third called terminal and the calling terminal according to the second incoming command; a second activation unit, The second access unit is configured to activate the calling terminal and the third Call the terminal's voice call operation.

According to the embodiment of the present invention, the first incoming call instruction of the calling terminal is received by the voice gateway, where the first incoming call instruction is used to indicate that the calling terminal performs a voice call with the first called terminal, and the first called terminal When the call forwarding state is set, the voice gateway forwards the second incoming call command in response to the first incoming call command to the second called terminal, and determines whether the second called terminal is an available terminal, according to the judgment result, and The call forwarding operation of the calling terminal and the available terminal is implemented according to the first incoming call command and the second incoming call command, thereby implementing call forwarding of the terminal; in the invention, the terminal call transfer is implemented by using a voice gateway, and the solution is implemented. The function of the terminal call transfer in the related art can only be realized by the soft switch server or the IP multimedia system, so that the transfer of the terminal is more convenient and flexible, and no longer depends on the soft switch server or the IP multimedia system.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a flow chart of a method for call forwarding according to an embodiment of the present invention;

2 is a block diagram showing the structure of a device for call forwarding according to an embodiment of the present invention;

3 is a block diagram of an optional structure of a device for call forwarding according to an embodiment of the present invention;

4 is a block diagram 2 of an optional structure of a device for call forwarding according to an embodiment of the present invention;

5 is a block diagram 3 of an optional structure of a device for call forwarding according to an embodiment of the present invention;

6 is a schematic structural diagram of implementing call forwarding based on a home voice gateway by three terminals according to an optional embodiment of the present invention;

7 is a method for implementing call forwarding based on a home voice gateway by three terminals according to an alternative embodiment of the present invention. flow chart;

FIG. 8 is a schematic structural diagram of implementing call forwarding based on a home voice gateway by four terminals according to an optional embodiment of the present invention; FIG.

9 is a flow chart of a method for implementing call forwarding based on a home voice gateway by four terminals according to an alternative embodiment of the present invention.

detailed description

It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

This embodiment provides a method for call forwarding. FIG. 1 is a flowchart of a method for call forwarding according to an embodiment of the present invention. As shown in FIG. 1, the steps of the method include:

Step S102: The voice gateway receives a first incoming call instruction of the calling terminal.

The first incoming call instruction is used to instruct the calling terminal to make a voice call with the first called terminal.

Step S104: When the first called terminal is set to the call forwarding state, the voice gateway forwards the second incoming call command in response to the first incoming call instruction to the second called terminal;

Step S106: The voice gateway determines whether the second called terminal is an available terminal.

Step S108: The voice gateway performs a voice call operation of the calling terminal and the available terminal according to the determination result and according to the first incoming call instruction and the second incoming call instruction.

In this embodiment, the voice gateway is used to receive a first incoming call command of the calling terminal, where the first incoming call instruction is used to indicate that the calling terminal performs a voice call with the first called terminal, and the first called terminal is used by the first called terminal. When the call forwarding state is set, the voice gateway forwards the second incoming call command in response to the first incoming call command to the second called terminal, and determines whether the second called terminal is an available terminal, according to the judgment result, and according to The first incoming call instruction and the second incoming call instruction implement a voice call operation of the calling terminal and the available terminal, thereby implementing call forwarding of the terminal; in this embodiment, the terminal call transfer is implemented by using a voice gateway. The problem that the function of the terminal call transfer in the related art can only be realized through the soft switch server or the IP multimedia system is solved, so that the transfer of the terminal is more convenient and flexible, and no longer depends on the soft switch server or the IP multimedia system.

In this embodiment, the voice gateway forwards the second incoming call command in response to the first incoming call instruction to the second called terminal in multiple manners. In an optional implementation manner in this embodiment, It is achieved as follows:

Step S11: The voice gateway sends a first message to the calling terminal.

The first message is used to indicate that the incoming call operation of the calling terminal is maintained;

Step S12: The voice gateway sends a second incoming call instruction to the second called terminal.

In addition, the manner in which the voice gateway involved in the embodiment determines whether the second called terminal is an available terminal includes:

When the second called terminal is in the normal state of the call, the voice gateway determines that the second called terminal is an available terminal; when the second called terminal is in the abnormal state of the call, the voice gateway determines that the third called terminal is an available terminal, where The third called terminal is in a normal call state.

The second called terminal is an available terminal when the second called terminal is in a normal state in the present embodiment. Therefore, in an optional implementation manner in this embodiment, according to the first incoming call instruction and the second The incoming call instruction to perform the voice call operation of the calling terminal and the available terminal can be implemented as follows:

Step S21: The voice gateway establishes a communication link between the second called terminal and the calling terminal according to the second incoming call instruction.

Step S22: The voice gateway activates the incoming call operation of the calling terminal;

Step S23: The voice gateway performs a voice call operation of the calling terminal and the second called terminal according to the link and the first incoming call instruction.

In an optional implementation manner in this embodiment, the voice gateway forwards the second incoming call command in response to the first incoming call instruction to the second After the terminal is called, the voice gateway forwards the second incoming call command to the third called terminal.

In this embodiment, the third called terminal is in a normal call state. Therefore, the voice call operation mode of the calling terminal and the available terminal according to the first incoming call command and the second incoming call command may be implemented in the following manner. include:

Step S31: The voice gateway establishes a link between the third called terminal and the calling terminal according to the second incoming call instruction.

Step S32: The voice gateway activates the incoming call operation of the calling terminal.

Step S33: The voice gateway performs a voice call operation of the calling terminal and the third called terminal according to the first incoming call command and the second incoming call command.

It should be noted that, in this embodiment, the third called terminal is in a normal state as an example. If the third called terminal is also in a call abnormal state, the voice gateway forwards the second incoming call. To the fourth called terminal, if the fourth called terminal is in a normal call state, implementing the fourth called terminal and the calling terminal The call connection is similar to the call connection between the third called terminal and the calling terminal; that is, in the process of implementing the call transfer by the voice gateway, during the process in which the calling terminal and the available terminal implement a call, the process of selecting an available terminal is A plurality of called terminals are involved, and the number of the called terminals can be set correspondingly according to the needs and actual conditions of the user, and multiple or one of them can be one.

In the embodiment, a call forwarding device is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and details are not described herein. As used below, the term "module" "unit" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

2 is a structural block diagram of a device for call forwarding according to an embodiment of the present invention. The device is located at a voice gateway. As shown in FIG. 2, the device includes: a receiving module 22, configured to receive a first incoming call instruction of the calling terminal, where The first incoming call instruction is used to instruct the calling terminal to make a voice call with the first called terminal; the forwarding module 24 is coupled to the receiving module 22, and is configured to respond when the first called terminal is set to the call forwarding state. The second incoming call command of the first incoming call command is forwarded to the second called terminal; the determining module 26 is coupled to the forwarding module 24, and is configured to determine whether the second called terminal is an available terminal; the executing module 28 and the determining module 28 The coupled connection is configured to perform a voice call operation of the calling terminal and the available terminal according to the judgment result and according to the first incoming command and the second incoming command.

3 is a block diagram of an optional structure of an apparatus for call forwarding according to an embodiment of the present invention. As shown in FIG. 3, the forwarding module 24 includes: a first sending unit 32, configured to send a first message to a calling terminal, where The first message is used to indicate that the incoming call operation of the calling terminal is maintained; the second sending unit 34 is coupled to the first sending unit 32 and configured to send a second incoming call command to the second called terminal.

Optionally, the determining module 26 is further configured to: when the second called terminal is in a call normal state, determine that the second called terminal is an available terminal; and when the second called terminal is in a call abnormal state, determine the third called party. The terminal is an available terminal, wherein the third called terminal is in a normal call state.

4 is a block diagram of an optional structure of a device for call forwarding according to an embodiment of the present invention. As shown in FIG. 4, when the second called terminal is in a normal call, the executing module 28 includes: a first establishing unit 42 configured to be configured according to the The second incoming call command establishes a communication link between the second called terminal and the calling terminal; the first activation unit 44 is coupled to the first establishing unit 42 and is configured to activate the incoming call operation of the calling terminal; the first execution unit 46 is coupled to the first activation unit 44 and configured to perform a voice call operation of the calling terminal and the second called terminal according to the link and the first incoming command.

Optionally, when the second called terminal is in a call abnormality, the forwarding module is further configured to: the voice gateway forwards the second incoming call instruction to the third called terminal.

5 is a block diagram 3 of an optional structure of a device for call forwarding according to an embodiment of the present invention, as shown in FIG. The module 28 includes: a second establishing unit 52, configured to establish a link between the third called terminal and the calling terminal according to the second incoming call instruction; the second activation unit 54 is coupled to the second establishing unit 52, and is configured to be configured to Activating an incoming call operation of the calling terminal; the second executing unit 56 is coupled to the second activation unit 54 and configured to perform a voice call between the calling terminal and the third called terminal according to the first incoming command and the second incoming command. operating.

The invention is exemplified below in conjunction with alternative embodiments of the invention.

The present embodiment is described by taking a home voice gateway as an example. The optional embodiment provides a home voice gateway-based call forwarding device, where the device includes a call forwarding configuration module, and is configured to configure whether to enable the call forwarding. Phone number, conditions for transferring the call, prompts to be played, etc.;

When the call forwarding function is enabled, the voice home gateway has an incoming call, and the corresponding user's phone rings; when the set call forwarding condition is satisfied, the voice call transfer module simulates off-hook, stops the phone ringing, and performs related Business processing, such as dialing the configured forwarding number, voice forwarding implementation when the call is connected, and so on.

It can be seen that the user connected through the home gateway FXS port does not really pick up the phone, and the voice switching module in the home voice gateway does not affect the voice quality of the call forwarding actual call parties, thereby achieving no soft switching. Or IMS server to implement call forwarding of the terminal.

Before the call forwarding condition is not met, the phone under the home gateway is answered, and the normal call is established, and the call forwarding process is no longer entered.

With the optional embodiment, the method for implementing call forwarding based on the home voice gateway is flexible, and does not require softswitch or IMS server support for call forwarding.

Embodiment 1

FIG. 6 is a schematic structural diagram of three terminals based on a home voice gateway implementing call forwarding according to an optional embodiment of the present invention, and FIG. 7 is a flowchart of a method for implementing call forwarding based on a home voice gateway by three terminals according to an alternative embodiment of the present invention. As shown in FIG. 6, the terminal includes three terminals, namely, a terminal A, a terminal B, and a terminal C. The terminal A is a phone connected to the FXS interface of the voice home gateway, and the terminal C belongs to the phone corresponding to the number set by the call forwarding. As shown in FIG. 7, for convenience of description, only the interaction between the three terminals is illustrated in FIG. 7, and the interaction between the voice home gateway and the three terminals is not exemplified, and the steps of the method include:

Step S702: If the terminal B calls the terminal A and the call forwarding condition configured by the home gateway is satisfied, the voice switching module simulates off-hook and stops ringing;

Step S704: A pre-recorded recording can be played to the terminal B to notify the call transfer;

Step S706: After the recording is completed, the home gateway sends signaling for maintaining the call of the terminal B to the network side softswitch or the IMS server;

Step S708: After receiving the hold signaling, the terminal B feeds back a response message.

Step S710: The home gateway voice switching module simulates the calling party to dial the terminal C;

Step S712: If the terminal C answers the call and the home gateway receives the off-hook response message of the terminal C, the voice switching module performs corresponding processing, and the physical layer completes the connection between the terminal B and the terminal C.

Step S714: The home gateway notifies the terminal C of related information (including the delivery information and the media information) of the call between the terminal A and the terminal B;

Step S716: The voice home gateway simultaneously sends the signaling of the external line terminal B to the softswitch or the IMS; the terminal B enters the call with the terminal C.

Embodiment 2

Embodiments A procedure for successfully transferring a call of a terminal C to a telephone call has been described in detail. The following describes the manner of call forwarding rejection by using FIG. 6 as an application scenario. After the terminal C rejects the answer or no response timeout, the home gateway restores the call between the terminal A and the terminal B, hangs up after playing the prompt tone, or directly hangs up to release the session with the terminal B.

8 is a schematic structural diagram of call forwarding based on a home voice gateway of four terminals according to an optional embodiment of the present invention, and FIG. 9 is a flowchart of a method for implementing call forwarding based on a home voice gateway by four terminals according to an optional embodiment of the present invention. As shown in Figure 8, terminal A and terminal B are user phones under the home gateway FXS port, terminal C is the user calling the home gateway under the calling party, and terminal D is the phone corresponding to the set call forwarding number; The method includes the steps of:

Step S902: terminal C calls terminal A;

The terminal C dials the home gateway user terminal A as the calling party;

Step S904: determining whether the terminal B is occupied;

After the call forwarding condition is met, the voice switching module determines whether the terminal B is occupied, and does not perform call forwarding when occupied;

Step S906: terminal B simulates off-hook and calls terminal D;

Wherein, the analog terminal B picks up the phone as the calling party, and dials the terminal D to which the call will be transferred;

Step S908: Whether the terminal D answers;

If the terminal D does not answer, the voice switching module will simulate the terminal B to hang up and release the resources; no call forwarding is performed.

Step S910: The terminal A simulates off-hook, and the switching module loops back the data of the terminal A and the terminal B.

The terminal D picks up the voice, and the voice switching module simulates that the terminal A picks up the phone, establishes a call connection with the terminal C, and loops back the data of the terminal A and the terminal B, and the terminal C and the terminal D establish a call connection, which is successfully implemented. Call transfer;

Step S912: C or D hangs up, and the switching module simulates terminals A and B to hang up to release resources;

The home gateway receives the signaling that the terminal C or the terminal D hangs up to release the call, and the voice switching module simulates that the terminal A and the terminal B hang up and release the resources.

In this alternative embodiment, the call forwarding module of the voice gateway implements call forwarding, and the user can autonomously turn the call forwarding function on or off through the configuration module according to his or her own desire, which is convenient and flexible, and no need for softswitch or IMS server pair. Support for call forwarding services.

The above is only an alternative embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

Claims

A method of call forwarding, comprising:

Receiving, by the voice gateway, a first incoming call instruction of the calling terminal, where the first incoming call instruction is used to indicate that the calling terminal performs a voice call with the first called terminal;

When the first called terminal is set to the call forwarding state, the voice gateway forwards the second incoming call instruction in response to the first incoming call instruction to the second called terminal;

The voice gateway determines whether the second called terminal is an available terminal;

The voice gateway performs a voice call operation of the calling terminal and the available terminal according to the determination result, and according to the first incoming call instruction and the second incoming call instruction.
The method of claim 1, wherein the voice gateway forwarding the second incoming call command in response to the first incoming call instruction to the second called terminal comprises:

The voice gateway sends a first message to the calling terminal, where the first message is used to indicate that an incoming call operation of the calling terminal is maintained;

The voice gateway sends the second incoming call instruction to the second called terminal.
The method of claim 1, wherein the determining, by the voice gateway, whether the second called terminal is an available terminal comprises:

When the second called terminal is in a call normal state, the voice gateway determines that the second called terminal is an available terminal;

When the second called terminal is in a call abnormal state, the voice gateway determines that the third called terminal is an available terminal, wherein the third called terminal is in a call normal state.
The method according to claim 2, wherein said calling terminal and said available terminal are executed according to said first incoming call command and said second incoming call command when said second called terminal talks normal Voice call operations include:

Establishing, by the voice gateway, a communication link between the second called terminal and the calling terminal according to the second incoming call instruction;

The voice gateway activates the incoming call operation of the calling terminal;

The voice gateway performs a voice call operation of the calling terminal and the second called terminal according to the link and the first incoming call instruction.
The method of claim 3, wherein when the second called terminal is in a call abnormality, the After the voice gateway forwards the second incoming call instruction to the second called terminal in response to the first incoming call instruction, the voice gateway further includes:

The voice gateway forwards the second incoming call instruction to the third called terminal.
The method of claim 5, wherein performing the voice call operation of the calling terminal and the available terminal according to the first incoming call instruction and the second incoming call instruction comprises:

Establishing, by the voice gateway, a link between the third called terminal and the calling terminal according to the second incoming call instruction;

The voice gateway activates the incoming call operation of the calling terminal;

The voice gateway performs a voice call operation of the calling terminal and the third called terminal according to the first incoming call instruction and the second incoming call instruction.
A call forwarding device, located in a voice gateway, comprising:

a receiving module, configured to receive a first incoming call instruction of the calling terminal, where the first incoming call instruction is used to indicate that the calling terminal performs a voice call with the first called terminal;

The forwarding module is configured to: when the first called terminal is set to the call forwarding state, forward the second incoming call command in response to the first incoming call instruction to the second called terminal;

a determining module, configured to determine whether the second called terminal is an available terminal;

And an execution module, configured to perform a voice call operation of the calling terminal and the available terminal according to the determination result, and according to the first incoming instruction and the second incoming instruction.
The apparatus of claim 7, wherein the forwarding module comprises:

a first sending unit, configured to send a first message to the calling terminal, where the first message is used to indicate that an incoming call operation of the calling terminal is maintained;

The second sending unit is configured to send the second incoming call instruction to the second called terminal.
The apparatus according to claim 7, wherein the determining module is configured to determine that the second called terminal is an available terminal when the second called terminal is in a call normal state; When the called terminal is in the abnormal state of the call, it is determined that the third called terminal is an available terminal, and the third called terminal is in a normal state of the call.
The apparatus according to claim 8, wherein when the second called terminal talks normally, the execution module comprises:

a first establishing unit, configured to establish, according to the second incoming command, a communication link between the second called terminal and the calling terminal;

a first activation unit, configured to activate the incoming call operation of the calling terminal;

The first execution unit is configured to perform a voice call operation of the calling terminal and the second called terminal according to the link and the first incoming command.
The apparatus according to claim 9, wherein, when the second called terminal is in a call abnormality, the forwarding module is further configured to: the voice gateway forwards the second incoming call instruction to the third The called terminal.
The apparatus of claim 11 wherein said execution module comprises:

a second establishing unit, configured to establish, according to the second incoming command, a link between the third called terminal and the calling terminal;

a second activation unit, configured to activate the incoming call operation of the calling terminal;

The second execution unit is configured to perform a voice call operation of the calling terminal and the third called terminal according to the first incoming call instruction and the second incoming call instruction.