JP2013098768A - Intercom system, intercom system control method, and intercom system control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intercom system capable of relaying an outside line telephone call to a specific member while minimizing a period of keeping the caller of the call waiting.SOLUTION: An intercom system 100 comprises a main controller 1 and plural slave units (communication terminals) 3a to 3e. When an outside line telephone call is answered by one of the slave units, the main controller 1 connects the path between an outside line terminal 200 and the communication terminal having answered. When receiving a relay command, the main controller 1 executes holding processing on the outside line terminal 200. When receiving an answer command from another slave unit answering a call from the communication terminal having answered the outside line telephone call, the main controller 1 releases the holding processing on the outside line terminal 200 and connects the path between the outside line terminal 200 and another slave unit mentioned.

Description

  The present invention relates to an intercom system, an intercom system control method, and a control program, which are improved methods for relaying an outside line telephone to a predetermined member.

  An intercom system is used as a communication means between a plurality of members, for example, between an administrator and an employee in a wide premises such as a large store, an amusement facility, and a factory (see Patent Document 1). In the intercom system, a plurality of members can be managed by being divided into groups, and only members within a specific group can be contacted, or all members of a plurality of groups can be contacted all at once. The intercom system may have a function of receiving an external phone call and making a call with the external phone.

Japanese Patent Laid-Open No. 11-355202

  In an intercom system, when an incoming external telephone is transferred to a predetermined member, it may be difficult to specify a member to be transferred depending on the contents of the external telephone. For example, when the member's name is not specified by a question such as “I want to transfer to someone who knows about XX” as the content of the outside line telephone, it is difficult to specify the member to be transferred. In such a case, it is necessary to contact individual members sequentially with the outside telephone line being put on hold, and to repeat the inquiry to the individual members until a specific member is reached. In this case, there is a problem in that a caller who has made an external telephone call waits for a long time.

  In view of such problems, the present invention provides an intercom system and an intercom system control method capable of relaying an external telephone to a specific member while minimizing the time for a caller who has made an external telephone to wait. And it aims at providing a control program.

  The present invention includes a main control device (1) and a plurality of communication terminals (3a to 3e) that communicate with the main control device wirelessly in order to solve the above-described problems of the prior art, and the main control device When an apparatus responds to an external line telephone call from the external line terminal (200) that has received an incoming call to the main control apparatus by any of the plurality of communication terminals, an external line call is established by connecting a path between the external line terminal and the responding communication terminal. When a relay command for relaying the external line telephone to another communication terminal is received from the responding communication terminal, a hold process is performed on the external line terminal, and a call from the responding communication terminal is performed. When a response command is received from another responding communication terminal, the hold process for the external line terminal is canceled, and the external line call process is executed by connecting a path between the external line terminal and the other communication terminal. Providing intercom system (100), characterized in that.

  In the intercom system, the main control device manages the plurality of communication terminals by dividing them into a plurality of groups, and removes the responding communication terminal from the group to which the responding communication terminal belonged. After executing the external line call process with the external line terminal and executing the hold process for the external line terminal, it is preferable to return the responding communication terminal to the group to which the responding communication terminal belonged.

  In the intercom system, the main control device manages the plurality of communication terminals by dividing them into a plurality of groups, and removes the responding communication terminal from the group to which the responding communication terminal belonged. When an outside line call process is performed with an outside line terminal and a call is made from the responding communication terminal to another group different from the group to which the responding communication terminal belongs, a call from the responding communication terminal is made. You may make it carry out with respect to the communication terminal in said other group.

  In the intercom system, the main control device manages the plurality of communication terminals by dividing them into a plurality of groups, and removes the responding communication terminal from the group to which the responding communication terminal belonged. When an outside line call process with an outside line terminal is executed and a call is made to the whole of the plurality of groups simultaneously from the responding communication terminal, a call from the responding communication terminal is communicated to each of the plurality of groups. You may make it perform simultaneously with respect to a terminal.

In the above intercom system, it is preferable that the main control device transmits an alarm sound to the responding communication terminal if another communication terminal does not respond even if a predetermined time has elapsed after the start of the hold process. .
In the above intercom system, when the main control device receives a response command from another communication terminal that has not been called by the responding communication terminal, the main control device releases the hold processing for the external line terminal and the external line terminal It is preferable not to perform an outside line call process by connecting a path between the communication terminal and the other communication terminal.

  In order to solve the above-described problems of the conventional technology, the present invention provides an interface including a main control device (1) and a plurality of communication terminals (3a to 3e) that communicate with the main control device wirelessly. A control method of a cam system (100), wherein the main control device notifies an external line telephone from an external line terminal (200) that has arrived to the main control device to at least one of the plurality of communication terminals. When a response command is received from the communication terminal that has responded to the external line telephone, the external line call processing is executed by connecting the path between the external line terminal and the responding communication terminal, and the external telephone is connected to the other communication from the responding communication terminal. When an intermediary command for intermediation to a terminal is received, a hold process is executed for the outside line terminal, and a response command is received from another communication terminal that responds to a call from the responding communication terminal When, along with releasing the hold process on the outside line terminal, a control method of the intercom system, characterized in that executing the external call processing by connecting a path between the said external terminal other communication terminals.

  In the control method of the intercom system, the main control device manages the plurality of communication terminals by dividing them into a plurality of groups, and the communication terminal that has responded belongs to the group to which the communication terminal that has responded belongs. When the outside line call process with the outside line terminal is executed and the hold process is executed for the outside line terminal, it is preferable to return the responding communication terminal to the group to which the responding communication terminal belongs.

  In the control method of the intercom system, the main control device manages the plurality of communication terminals by dividing them into a plurality of groups, and the communication terminal that has responded belongs to the group to which the communication terminal that has responded belongs. When the call is made to the other group different from the group to which the responding communication terminal belongs from the responding communication terminal, the outside communication process is performed from the responding communication terminal. May be made to the communication terminals in the other group.

  In the control method of the intercom system, the main control device manages the plurality of communication terminals by dividing them into a plurality of groups, and the communication terminal that has responded belongs to the group to which the communication terminal that has responded belongs. Disconnecting and executing an external line call process with the external terminal, and when the responding communication terminal is collectively called for the plurality of groups, the call from the responding communication terminal is made within the plurality of groups. You may make it perform simultaneously with respect to each communication terminal.

In the above intercom system control method, the main control device transmits an alarm sound to the responding communication terminal if another communication terminal does not respond even if a predetermined time elapses after the suspension process is started. It is preferable.
In the control method of the intercom system, when the main control device receives a response command from another communication terminal that has not been called from the responding communication terminal, release of the hold processing for the external line terminal and It is preferable not to perform an outside line call process by connecting a path between the outside line terminal and the other communication terminal.

  Furthermore, in order to solve the above-described problems of the prior art, the present invention provides an interface including a main control device (1) and a plurality of communication terminals (3a to 3e) that communicate with the main control device wirelessly. At least one of the plurality of communication terminals is notified of an external line call from the external line terminal (200) that has arrived at the main control unit to a computer mounted on the main control unit in the cam system (100) And when a response command is received from the communication terminal responding to the external telephone, connecting the path between the external line terminal and the responding communication terminal to execute an external line call process; and from the responding communication terminal to the external line Upon receiving an intermediary command to relay the telephone to another communication terminal, a step of executing a hold process for the external terminal and the responding communication terminal When a response command is received from another communication terminal that responds to the call, a step of canceling the hold process for the external line terminal and executing a line call process by connecting a path between the external line terminal and the other communication terminal; A control program for an intercom system is provided.

  In the control program for the intercom system, the plurality of communication terminals are managed in a plurality of groups, and the responding communication terminal is removed from the group to which the responding communication terminal belonged to the computer. Executing an external line call process with the external line terminal, and executing a hold process for the external line terminal, returning the responding communication terminal to the group to which the responding communication terminal belonged. Is preferred.

  In the control program for the intercom system, the plurality of communication terminals are managed in a plurality of groups, and the responding communication terminal is removed from the group to which the responding communication terminal belonged to the computer. When a call is made to the other group different from the group to which the responding communication terminal belongs from the responding communication terminal, the step of executing an external line call process with the external line terminal, from the responding communication terminal To the communication terminal in the other group may be executed.

  In the control program for the intercom system, the plurality of communication terminals are managed in a plurality of groups, and the responding communication terminal is removed from the group to which the responding communication terminal belonged to the computer. A step of executing an outside line call process with the outside line terminal, and a call from the responding communication terminal to the whole of the plurality of groups all at once. You may make it perform the step performed simultaneously with respect to each communication terminal.

In the control program for the intercom system, if another communication terminal does not respond even after a predetermined time has elapsed after the hold process is started, a step of transmitting an alarm sound to the responding communication terminal may be executed. preferable.
In the control program for the intercom system, when a response command is received from another communication terminal that has not been called from the responding communication terminal, release of the hold processing for the external line terminal and the external line terminal and the other It is preferable not to execute the outside line call processing by connecting the path with the communication terminal.

  According to the intercom system, the intercom system control method, and the control program of the present invention, it is possible to reduce the time for which a caller who has made an external line call to wait as much as possible, and relay the external line telephone to a specific member.

It is a block diagram which shows the example of whole structure of one Embodiment of the intercom system of this invention. It is a block diagram which shows the specific structural example of the main | base station 2 and the subunit | mobile_unit 3 in FIG. It is a top view which shows the example of the external appearance structure of the subunit | mobile_unit 3 in FIG. It is a conceptual diagram for demonstrating the group structure of the subunit | mobile_unit 3 in FIG. It is a flowchart for demonstrating one Embodiment of the intercom system of this invention, the control method of an intercom system, and a control program. It is a conceptual diagram which shows the state which had the outside line incoming from the outside line terminal. It is a conceptual diagram for demonstrating the agency operation | movement to the subunit | mobile_unit 3 in the group G1 in FIG. FIG. 8 is a conceptual diagram showing a state in which it is relayed to the other handset 3 in the group G1 from the state of FIG. It is a conceptual diagram for demonstrating the agency operation | movement to the subunit | mobile_unit 3 in the group G2 in FIG. FIG. 10 is a conceptual diagram showing a state in which the slave unit 3 in the group G2 is relayed from the state of FIG. It is a conceptual diagram for demonstrating simultaneous brokering operation | movement to all the subunit | mobile_units 3 in the group G1, G2 in FIG. It is a conceptual diagram which shows the state relayed to the other subunit | mobile_unit 3 in the group G1 from the state of FIG.

  Hereinafter, an embodiment of an intercom system, an intercom system control method, and a control program according to the present invention will be described with reference to the accompanying drawings. First, the configuration of an intercom system 100 according to an embodiment will be described with reference to FIGS. 1 and 2. An intercom system 100 shown in FIG. 1 includes a main control device 1, parent devices 2 a and 2 b, child devices 3 a to 3 e, a voice input / output unit 4, a speaker 5, and a sound source 6. The main control device 1 is installed at a predetermined location on the premises or outside the premises, and the master units 2a and 2b are attached to, for example, walls and ceilings. The subunit | mobile_unit 3a-3e is possessed by each member using the intercom system 100.

  The voice input / output unit 4, the speaker 5, and the sound source 6 are provided as necessary, and these configurations can be omitted.

  The main control device 1 includes a control unit 11, a voice synthesis unit 12, and a sound generation unit 13. Master devices 2a and 2b are connected to main controller 1 by wire. The master units 2a and 2b are collectively referred to as the master unit 2 when the master unit 2a or the master unit 2b is not specified. Here, although two master units 2 are connected to the main controller 1, more master units may be connected, or only one master unit 2 may be connected. The number of base units 2 is arbitrary.

  The slave units 3a and 3b are wirelessly connected to the master unit 2a, and the slave units 3c to 3e are wirelessly connected to the master unit 2b. A case where the slave units 3a to 3e are collectively referred to or the slave unit 3a to 3e is not specified is referred to as a slave unit 3. The subunit | mobile_unit 3 is a communication terminal which communicates with the main control apparatus 1 by radio | wireless. Here, two child devices 3 are connected to the parent device 2a, and three child devices 3 are connected to the parent device 2b, but this is merely an example, and the child devices 3 are limited to two or three. is not. Usually, the maximum number of slave units 3 that can be connected to one master unit 2 is determined, and any number of slave units 3 within the range of the maximum number may be connected.

  A voice input / output unit 4 is connected to the main controller 1. The voice input / output unit 4 generates a voice signal output from the main control device 1 from the speaker 5. The voice spoken by the slave unit 3 can be generated from the speaker 5 via the master unit 2, the main controller 1, and the voice input / output unit 4. Although only one speaker 5 is shown here, a plurality of speakers 5 may be connected. The voice input / output unit 4 supplies the sound generated by the sound source 6 to the main controller 1. The sound source 6 may be a generator that generates a warning sound or a microphone. There may be a plurality of sound sources 6 as well. Sound generated by the sound source 6 can be transmitted to the slave unit 3 via the voice input / output unit 4, the main controller 1, and the master unit 2.

  As shown in FIG. 2A, the base unit 2 includes a control unit 21, a reception unit 22, and a transmission unit 23. The subunit | mobile_unit 3 is provided with the control part 31, the receiving part 32, and the transmission part 33 as shown to FIG. 2 (B).

  The subunit | mobile_unit 3 is comprised as shown in FIG. As shown in FIG. 3, the handset 3 includes a main unit 301 and a microphone unit 302. The main unit 301 and the microphone unit 302 are connected by a curl cord 303. The main unit 301 includes a speaker SPR, a call button B1, a group button B2, a group switching button B3, a simultaneous button B4, an individual button B5, an option button B6, a response button B7, and a volume button B8 as a plurality of function buttons. .

  The microphone unit 302 includes a call button B1 and a microphone MIC. An earphone 305 is connected to the microphone unit 302 by a cord 304. Each member attaches the microphone unit 302 to a predetermined place such as a chest pocket or a collar so that the voice uttered by the microphone MIC can be easily collected.

  In the intercom system 100 shown in FIG. 1, it is assumed that the slave units 3a to 3e are grouped as shown in FIG. The control unit 11 of the main control device 1 manages grouping of the slave units 3a to 3e. In FIG. 4, illustration of the base unit 2 is omitted for simplification. As shown in FIG. 4, the subunit | mobile_unit 3c-3e comprises the group G1, and the subunit | mobile_unit 3a, 3b comprises the group G2. In addition, the intercom system 100 of this embodiment is a digital intercom system, and the slave units 3 of all members that communicate with the main controller 1 are always connected.

  A call button B1 in the main unit 301 is a button for starting a call. The group button B2 is a button for making a call with a member of the group G1 if the handset 3c to 3e, and a member of the group G2 if the handset 3a and 3b. If the group button B2 is pressed and the call button B1 is pressed, the members of the group G1 or G2 can make a call. The voice synthesizing unit 12 of the main control device 1 synthesizes the voice transmitted from the transmission unit 33 of the slave unit 3 that is a member of the group G1 or G2 to the reception unit 32 of the slave unit 3 that is a member of the group G1 or G2. As a result, each member can hear the call between the members.

  The group switching button B3 is a button for switching to the group G2 if it is a member of the group G1, and switching to the group G1 if it is a member of the group G2. By switching the group using the group switching button B3, it is possible to talk with members of different groups. The simultaneous button B4 is a button for contacting all the members of the groups G1 and G2 all at once. When the simultaneous button B4 is pressed, the voice synthesizer 12 synthesizes the voices transmitted from the transmitters 33 of all the slave units 3 and supplies the synthesized voices to the receivers 32 of all the slave units 3. The individual button B5 is a button for individually contacting a specific member (slave device 3). An identification number of a specific handset 3 is set in advance in the individual button B5.

  The option button B6 is a button for assigning other functions. In this embodiment, the option button B6 is assigned as a relay button for relaying an external telephone to other members. Hereinafter, it is referred to as an agency button B6. A button dedicated to the agency may be provided on the main unit 301. The main body unit 301 may be provided with a broadcast button for announcement broadcasting for generating sound from the speaker 5 and a call button for calling a specific member such as a leader of each group. Additional option buttons may be provided, and broadcast buttons and invitation buttons may be assigned to the additional option buttons.

  An embodiment of a control method and a control program for the intercom system 100, which is processing related to an incoming call from the external line terminal 200, executed by the control unit 11 of the main controller 1, will be described with reference to FIG. The control part 11 can be comprised with a microcomputer. Each step shown in FIG. 5 can be executed by the microcomputer mounted on the main controller 1 by the control program of the intercom system 100. The control program of the intercom system 100 is stored in the storage unit in the main controller 1.

  In FIG. 5, the control unit 11 determines whether or not there is an incoming call from the external line terminal 200 in step S <b> 1. If there is no incoming call (NO), step S1 is repeated. If there is an outside line incoming call (YES), the control unit 11 notifies the predetermined handset 3 of the outside line incoming call in step S2. In the present embodiment, the predetermined handset 3 is a handset 3e. You may notify the some cordless handset 3 of an outside line incoming call.

  The sound generation unit 13 of the main control device 1 generates a ringing tone for notifying a predetermined slave unit 3 of an incoming call to the outside line and supplies the ringing tone to the reception unit 32 of the slave unit 3 via the master unit 2. The ringing tone received by the receiving unit 32 is generated from the speaker SPR or the earphone 305 of the main unit 301.

  In step S3, the control unit 11 determines whether a response command has been received from the child device 3e. If the response command is not received (NO), the control unit 11 returns the process to step S2. If a response command is received (YES), the control part 11 will perform an outside line telephone call process by connecting the path | pass with the subunit | mobile_unit 3 (here, subunit | mobile_unit 3e) which responded with the outside line terminal 200 in step S4. The external line call process is a voice information transmission / reception process for executing an external line call between the external line terminal 200 and the handset 3e. FIG. 6 conceptually shows a state where the path between the external terminal 200 and the slave unit 3e is connected. The subunit | mobile_unit 3e remove | deviates from the group call in the group G1, and becomes the separate call TKi with the outside line terminal 200 and the subunit | mobile_unit 3e.

  It is assumed that the member who owns the handset 3e wants to transfer an external line call from the external terminal 200 to another member, but cannot identify the member to be transferred. In this case, the member possessing the child device 3e presses the agency button B6. In step S5, the control unit 11 determines whether or not an agency command output by pressing the agency button B6 has been received. If the agency command is not received (NO), the control unit 11 repeats step S5. If the agency command is received (YES), the control unit 11 executes a hold process on the outside line terminal 200 in step S6. Specifically, the sound generator 13 generates a holding sound and sends it to the outside line terminal 200.

  In step S7, control unit 11 returns the responding child device 3 (here, child device 3e) to the group call. As shown in FIG. 7, the handset 3e returns to the group call in the group G1. In FIG. 7, the hold tone is output from the handset of the outside line terminal 200. The member who owns the handset 3e calls the handset 3c, 3d in the group G1 to call the handset T0 to the outside line in order to transfer the outside line call to the member who owns the handset 3c, 3d in the group G1. Call to answer. A called call T1 is sent to the slave units 3c and 3d.

  The controller 11 determines whether or not a response command has been received from another child device 3 in step S8. If the response command is not received (NO), the control unit 11 repeats step S8. When the response command is received (YES), the control unit 11 cancels the hold processing for the external line terminal 200 in step S9, and connects the path between the external line terminal 200 and the other slave unit 3 that has responded in step S10. Executes external line call processing.

  It is assumed that among the members who own the child devices 3c and 3d, the member who owns the child device 3c is appropriate as an answerer for an inquiry by an external telephone, and the member who owns the child device 3c presses the response button B7. Then, as shown in FIG. 8, the outside line terminal 200 and the handset 3c become individual calls TKi, and the handset 3c is removed from the group call in the group G1.

  In the intercom system 100 according to the present embodiment, since the group call is basic, when only the relay button B6 is pressed, the relay is performed within the same group. Of course, if the agency button B6 is pressed after the group button B2 is pressed, the agency may be in the same group. The method of operating the function buttons on the main unit 301 is arbitrary.

  When the controller 11 starts the hold process for the external line terminal 200 in step S6, it is preferable to operate a timer (not shown) and measure the time from the start of the hold process. If the other handset 3 does not respond after a predetermined time has elapsed since the start of the hold process, the control unit 11 preferably transmits an alarm sound for prompting the handset 3e to cancel the hold process. . If an alarm sound is transmitted after a predetermined time has elapsed since the start of the hold process, it is possible to prevent the person who has made an outside line call from waiting too much when the other handset 3 does not respond.

  Although FIG. 7 and FIG. 8 describe the case where an outside telephone is relayed to other members in the same group G1, it is also possible to relay an outside telephone to members of another group. From the state shown in FIG. 6, the state shown in FIG. 9 can be obtained by pressing the group switching button B3 and the agency button B6 to switch to the group G2. In FIG. 9, the calling call T0 from the handset 3e is sent as the called call T1 to the handset 3a, 3b in the group G2. For example, when the relay button B6 is pressed after the group switching button B3 is pressed, it may be relayed to the members of the group G2.

  It is assumed that, among the members who own the child devices 3a and 3b, the member who owns the child device 3a is appropriate as an answerer for an inquiry by an external telephone, and the member who owns the child device 3a presses the response button B7. Then, as shown in FIG. 10, the outside line terminal 200 and the handset 3a become the individual call TKi, and the handset 3a is removed from the group call in the group G2.

  As shown in FIGS. 7 and 8, if the case of relaying to the slave unit 3 in the same group G1 as the responding slave unit 3e is compared with the case of relaying to the slave unit 3 in another group G2, the same group It is preferable to relay to the handset 3 in G1. When relaying to the slave unit 3 in the same group G1, the relay destination is limited to the slave unit 3 that is originally connected to the slave unit 3e, so that an erroneous operation of the response button B7 is unlikely to occur.

  In addition, in step S8 in FIG. 5, it is also desirable to configure not to accept the pressing of the response button B7 from the handset 3 that is not talking to the handset 3e that has called the call while holding the outside line call. Specifically, the response from the slave unit 3e that has pressed the relay button B6 and the slave unit connected to the call path (slave units 3c and 3d in the example of FIG. 7 and slave units 3a and 3b in the example of FIG. 9). When the command is received, release of the hold process in step S9 and external line call process in step S10 are performed. On the other hand, when a response command is received from the handset 3 that is not connected to the handset 3e and the call path, the release of the hold process in step S9 and the external line call process in step S10 are not performed. As a result, the slave unit 3 that has not received an interrogation call is not permitted to perform the interrogation, and erroneous operations can be suppressed particularly when calling the slave unit 3 other than the same group.

  Furthermore, it is possible to call all the members of the groups G1 and G2 all at once and search for members to be transferred. From the state shown in FIG. 6, the state shown in FIG. 11 can be obtained by pressing the simultaneous button B4 and the agency button B6. In FIG. 11, the calling call T0 from the handset 3e is transmitted as the called call T1 to the handset 3a to 3d that are all the remaining members of the groups G1 and G2. For example, if the relay button B6 is pressed after the simultaneous button B4 is pressed, it may be relayed to the members of the groups G1 and G2.

  It is assumed that among the members who own the child devices 3a to 3d, the member who owns the child device 3d is suitable as an answerer for an inquiry by an external telephone, and the member who owns the child device 3d presses the response button B7. Then, as shown in FIG. 12, the outside line terminal 200 and the handset 3d become individual calls TKi, and the handset 3d is removed from the group call in the group G1.

  The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the scope of the present invention. For example, the main controller 1 and the parent device 2 may be integrated.

1 Main controller 2, 2a, 2b Master unit 3, 3a-3e Slave unit (communication terminal)
DESCRIPTION OF SYMBOLS 4 Voice input / output part 5 Speaker 6 Sound source 11, 21, 31 Control part 12 Voice synthesis part 13 Sound generation part 22, 32 Reception part 23, 33 Transmission part 100 Intercom system 200 External line terminal

Claims (18)

A main control device and a plurality of communication terminals that communicate with the main control device wirelessly;
The main controller is
When an external telephone from an external terminal that has received an incoming call to the main control device is responded by any of the plurality of communication terminals, an external telephone call process is performed by connecting a path between the external terminal and the responding communication terminal,
When receiving a relay command for relaying the external telephone to another communication terminal from the responding communication terminal, execute a hold process for the external line terminal,
When a response command is received from another communication terminal that responds to the call from the responding communication terminal, the holding process for the external line terminal is canceled, and an external call is established by connecting a path between the external line terminal and the other communication terminal. An intercom system characterized by executing processing. The main controller is
The plurality of communication terminals are divided into a plurality of groups and managed.
Remove the responding communication terminal from the group to which the responding communication terminal belonged and execute an outside line call process with the outside line terminal,
2. The intercom system according to claim 1, wherein when a hold process is executed for the outside line terminal, the responding communication terminal is returned to the group to which the responding communication terminal belonged. The main controller is
The plurality of communication terminals are divided into a plurality of groups and managed.
Remove the responding communication terminal from the group to which the responding communication terminal belonged and execute an outside line call process with the outside line terminal,
When a call is made from the responding communication terminal to another group different from the group to which the responding communication terminal belongs, a call from the responding communication terminal is sent to the communication terminals in the other group. The intercom system according to claim 1, wherein the intercom system is performed. The main controller is
The plurality of communication terminals are divided into a plurality of groups and managed.
Remove the responding communication terminal from the group to which the responding communication terminal belonged and execute an outside line call process with the outside line terminal,
When the responding communication terminals are collectively addressed to the plurality of groups, the responding communication terminals are simultaneously addressed to the communication terminals in the plurality of groups. The intercom system according to claim 1. The main controller is
The alarm sound is transmitted to the responding communication terminal if another communication terminal does not respond even if a predetermined time elapses after the start of the hold process. The intercom system described. The main controller is
When a response command is received from another communication terminal that has not been called by the responding communication terminal, the holding process for the external line terminal is canceled and the external line connecting the path between the external line terminal and the other communication terminal The intercom system according to any one of claims 1 to 5, wherein call processing is not performed. A control method for an intercom system comprising a main control device and a plurality of communication terminals that communicate with the main control device wirelessly,
The main controller is
Notifying at least one of the plurality of communication terminals of an external line call from the external line terminal that has arrived at the main control device;
When a response command is received from the communication terminal that responds to the external line telephone, the external line call processing is executed by connecting a path between the external line terminal and the responding communication terminal,
When receiving a relay command for relaying the external telephone to another communication terminal from the responding communication terminal, execute a hold process for the external line terminal,
When a response command is received from another communication terminal that responds to the call from the responding communication terminal, the holding process for the external line terminal is canceled, and an external call is established by connecting a path between the external line terminal and the other communication terminal. A method for controlling an intercom system, characterized by executing a process. The main controller is
The plurality of communication terminals are divided into a plurality of groups and managed.
Remove the responding communication terminal from the group to which the responding communication terminal belonged and execute an outside line call process with the outside line terminal,
The intercom system control method according to claim 7, wherein when a hold process is executed for the outside line terminal, the responding communication terminal is returned to the group to which the responding communication terminal belongs. The main controller is
The plurality of communication terminals are divided into a plurality of groups and managed.
Remove the responding communication terminal from the group to which the responding communication terminal belonged and execute an outside line call process with the outside line terminal,
When a call is made from the responding communication terminal to another group different from the group to which the responding communication terminal belongs, a call from the responding communication terminal is sent to the communication terminals in the other group. The intercom system control method according to claim 7, wherein the intercom system is controlled. The main controller is
The plurality of communication terminals are divided into a plurality of groups and managed.
Remove the responding communication terminal from the group to which the responding communication terminal belonged and execute an outside line call process with the outside line terminal,
When the responding communication terminals are collectively addressed to the plurality of groups, the responding communication terminals are simultaneously addressed to the communication terminals in the plurality of groups. The control method of the intercom system of Claim 7. The main controller is
The alarm sound is transmitted to the responding communication terminal if another communication terminal does not respond even if a predetermined time elapses after the start of the hold process. The intercom system control method described. The main controller is
When a response command is received from another communication terminal that has not been called by the responding communication terminal, the holding process for the external line terminal is canceled and the external line connecting the path between the external line terminal and the other communication terminal The intercom system control method according to any one of claims 7 to 11, wherein call processing is not performed. In a computer mounted on the main controller in an intercom system comprising a main controller and a plurality of communication terminals that communicate with the main controller wirelessly,
Notifying at least one of the plurality of communication terminals of an external line call from an external line terminal that has received an incoming call to the main control device;
When receiving a response command from the communication terminal that responded to the external line telephone, connecting the path between the external line terminal and the responding communication terminal to execute an external line call process;
When a relay command for relaying the external line telephone to another communication terminal is received from the responding communication terminal, executing a hold process for the external line terminal;
When a response command is received from another communication terminal that responds to the call from the responding communication terminal, the holding process for the external line terminal is canceled, and an external call is established by connecting a path between the external line terminal and the other communication terminal. Executing the process;
A control program for an intercom system, characterized in that The plurality of communication terminals are managed by being divided into a plurality of groups,
In the computer,
Removing the responding communication terminal from the group to which the responding communication terminal belonged and executing an outside line call process with the outside line terminal;
When holding processing is performed for the external terminal, the step of returning the responding communication terminal to the group to which the responding communication terminal belonged;
14. The control program for an intercom system according to claim 13, wherein: The plurality of communication terminals are managed by being divided into a plurality of groups,
In the computer,
Removing the responding communication terminal from the group to which the responding communication terminal belonged and executing an outside line call process with the outside line terminal;
When a call is made from the responding communication terminal to another group different from the group to which the responding communication terminal belongs, a call from the responding communication terminal is sent to the communication terminals in the other group. Steps to do,
14. The control program for an intercom system according to claim 13, wherein: The plurality of communication terminals are managed by being divided into a plurality of groups,
In the computer,
Removing the responding communication terminal from the group to which the responding communication terminal belonged and executing an outside line call process with the outside line terminal;
When calling from the responding communication terminals to the whole of the plurality of groups all at once, performing a call from the responding communication terminals to the communication terminals in the plurality of groups all at once,
14. The control program for an intercom system according to claim 13, wherein:   17. The step of transmitting an alarm sound to the responding communication terminal is executed if another communication terminal does not respond even if a predetermined time elapses after the start of the hold process. The control program of the intercom system of Claim 1. When a response command is received from another communication terminal that has not been called by the responding communication terminal, the holding process for the external line terminal is canceled and the external line connecting the path between the external line terminal and the other communication terminal The intercom system control program according to any one of claims 13 to 17, wherein call processing is not executed.

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