JP2000151820A - Method and system for controlling incoming and outgoing call - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the method and the system for controlling an outgoing call and an incoming call where the call can be transferred even when a telephone number of a transfer destination is unknown. SOLUTION: The private telephone system has at least plural trunk line interfaces I/F1-I/Fb connectable to a PBX 1, plural radio repeaters CS1-CSd, plural mobile radio terminals PS1-PSc that connect to the radio repeaters CS 1-CSd, and a controller 2 that controls the entire system and where the devices except plural mobile radio terminals PS1-PSc are interconnected by a LAN. The controller 2 groups the mobile radio terminals PS1-PSc and transfers a speech to the mobile radio terminal PS3 that makes entry of a transfer urge special number when the mobile radio terminal PS1 enters a transfer permission entry and the other mobile radio terminals PS3 in the same group enters the transfer urge special number.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private telephone system in which a plurality of office lines can be connected to a LAN via a private branch exchange and a plurality of terminals are connected to the LAN. The present invention relates to an outgoing / incoming call control device and method for controlling an incoming / outgoing call.

[0002]

2. Description of the Related Art Conventionally, there are provided a plurality of station line interface devices, a plurality of wireless repeaters, a plurality of mobile wireless terminals connected to the wireless repeaters via wireless sections, and a controller for controlling the entire system, In a digital cordless system in which the devices except for a plurality of mobile wireless terminals are directly connected via a LAN, the transfer to the mobile wireless terminal is performed by:
Turn

[0003] This is done by inputting the telephone number of the mobile radio terminal to be sent.

However, in the conventional digital cordless system, when a transfer is required during a call, if the telephone number of the transfer destination mobile radio terminal is unknown,
There is a problem that the transfer cannot be performed unless the transfer destination telephone number is checked or the telephone number of the transfer destination is asked to another person.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide an incoming / outgoing call control method and apparatus which can transfer a call even if the transfer destination telephone number is unknown.

[0005]

SUMMARY OF THE INVENTION As means for achieving the above object, the present invention aims to provide an outgoing / incoming call control method and apparatus described below.

[0006] 1. A plurality of central office interface devices,
Each device having at least a plurality of wireless repeaters, a plurality of mobile wireless terminals connected to the wireless repeaters via wireless sections, and a controller for controlling the entire system, and excluding the plurality of mobile wireless terminals A call control method for controlling an incoming / outgoing call of a private telephone system connected by a narrow area network, wherein when the plurality of mobile radio terminals are grouped and transferred within this group, When a transfer permission input is performed from a wireless terminal and a transfer promotion special number is input from another mobile wireless terminal in the same group, a call is transferred to the mobile wireless terminal to which the transfer promotion special number has been input. Outgoing and incoming call control methods.

[0007] 2. A plurality of central office interface devices,
A plurality of wireless repeaters, a plurality of mobile wireless terminals connected to the wireless repeaters via wireless sections, a plurality of wired terminals, and a controller for controlling the entire system; In an outgoing / incoming call control method for controlling an outgoing / incoming call of a private telephone system in which devices other than terminals are connected by a narrow area network, the plurality of mobile wireless terminals and the plurality of wired terminals are grouped, and When performing a transfer, a transfer permission input is performed from the mobile radio terminal or the wired terminal during a call, and a transfer promotion special number input is performed from another mobile radio terminal or the wired terminal in the same group. A call transmission / reception control method, wherein a call is transferred to the mobile wireless terminal or the wired terminal to which the transfer promotion special number has been input.

[0008] 3. A plurality of central office interface devices,
Each device having at least a plurality of wireless repeaters, a plurality of mobile wireless terminals connected to the wireless repeaters via wireless sections, and a controller for controlling the entire system, and excluding the plurality of mobile wireless terminals A call control device for controlling an incoming / outgoing call of a private telephone system connected by a narrow area network, the controller comprising: group information storing means for storing group information obtained by grouping the plurality of mobile radio terminals; And a call control means for transferring the call to another mobile radio terminal in the same group in which the transfer promotion special number has been input when a transfer permission input is performed from the mobile radio terminal during the transfer. An outgoing / incoming call control device, comprising:

4. A plurality of central office interface devices,
A plurality of wireless repeaters, a plurality of mobile wireless terminals connected to the wireless repeaters via wireless sections, a plurality of wired terminals, and a controller for controlling the entire system; In an incoming / outgoing call control device for controlling an outgoing / incoming call of a private telephone system in which each device except a terminal is connected by a narrow area network, the controller groups the plurality of mobile wireless terminals and the plurality of wired terminals. A group information storage unit for storing group information; and when a transfer permission input is performed from the mobile radio terminal or the wired terminal during a call, the call is put on hold, and another call in the same group in which the transfer promotion special number is input. And a call control means for transferring the call to the mobile radio terminal or the wired terminal.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a PBX 1 and a plurality of (b) office line interface devices I / F1 to I / F as one embodiment of a private branch telephone system to which an outgoing / incoming call control method and device of the present invention is applied. Fb, a plurality (d) of wireless repeaters CS1 to CSd, and a plurality (c) of mobile wireless terminals PS1 to PSc connected to the wireless repeater CS via a wireless section.
And a plurality of (e) wired terminals DT1 to DTe and a controller 2 for controlling the entire system, and each device except for the plurality of mobile wireless terminals PS1 to PSc is directly connected to a LAN. 1 shows the overall configuration of a telephone system (digital cordless system). Note that b, c, d,
e is an integer of 1 or more, and may be the same number, a different number, or zero (0).

The PBX 1 shown in FIG. 1 has, as a general basic configuration, a control section 10, a communication path switch section 12, a line circuit section 13, a trunk circuit section 11, and the like as shown in FIG. It is.

The control unit 10 includes a processor CPU 14, a memory 15, an input / output control unit 16, an input / output device 17, and the like. The switching connection control and various applications such as call processing are executed by software programs, and the control unit 10 executes the programs to control the communication path devices (11, 13) and the communication path switch unit 12.

In the case of a digital PBX, for example, a time-division switch using a memory is used as the communication path switch unit 12, thereby converting a time slot.

The line circuit section 13 generally includes, for example, an analog extension circuit, a digital extension circuit, an ISDN (integr
ated services digital network: a basic rate interface extension circuit for a terminal, a primary rate interface extension circuit, and the like. In the present embodiment, the central office interface devices 1 / F1 to 1-F1 of FIG. Connected to I / Fb.

The trunk circuit section 11 has a function of interfacing with the PBX and another PBX via a public line network or a dedicated line.

The line interface device I / F1 shown in FIG.
As shown in FIG. 3, for example, each of the I / Fb includes a station line control unit 40 that performs signal processing and control for a station line and a LAN system control unit 50 that performs signal processing and control for a LAN. Thus, the interface between the local line of the PBX 1 and the LAN is performed.

The line control unit 40 includes a line unit 41, a logic unit 42, a communication unit 43, a RAM 44, a ROM 45, and a CPU.
46. The office line unit 41 is connected to the office line and transmits and receives signals. The logic unit 42 performs an actual signal conversion process. The CPU 46 controls each unit based on a program stored in the ROM 45 and performs various arithmetic processes. The RAM 44 temporarily stores data and operates as a work RAM of the CPU 46. The communication unit 43 transmits and receives data to and from the LAN control unit 50.

The LAN control unit 50 includes a communication unit 51, a logic unit 52, a LAN interface unit 53, and a RAM 5.
4, a ROM 55 and a CPU 56. Communication unit 51
Performs data transmission and reception with the line control unit 40. The logic unit 52 performs an actual signal conversion process. CPU56
Controls each unit based on a program stored in the ROM 55 and performs various arithmetic processing. RAM 54 is
The data is temporarily stored, and operates as a work RAM of the CPU 56. The LAN interface unit 53 is connected to the LAN to transmit and receive signals.

Each of the radio repeaters CS1 to CSd in FIG. 1 corresponds to a so-called master unit or base station of a cordless telephone system, and for example, as shown in FIG. A plurality of mobile radio terminals PS1 through PS via a radio section.
c, and performs an interface with the LAN.

The radio system control unit 60 includes an RF unit 61, a baseband IC unit 62, a communication unit 63, a RAM 64, and a ROM 6.
5. It has a CPU 66. The RF unit 61 modulates and demodulates a baseband signal to a radio frequency, amplifies a transmission / reception signal from an antenna, oscillates a carrier frequency, detects a signal level of another channel frequency, and the like. Baseband IC
The unit 62 modulates and demodulates a connection sequence control signal with the mobile radio terminal PS, and combines and separates a voice signal and a control signal. The CPU 66 controls each unit based on a program stored in the ROM 65, and performs recognition of a call name (ID code), carrier sense processing, and the like. The carrier sense process is a process of searching in advance for a frequency to be used, confirming that the same frequency is not used, and using that frequency. In ROM65,
The call name (ID code) is also stored. RAM64
Temporarily stores data and operates as a work RAM of the CPU 66. The communication unit 63 transmits and receives data to and from the LAN control unit 70.

The LAN control section 70 includes a communication section 71, a logic section 72, a LAN interface section 73, a RAM 7
4. It has a ROM 75 and a CPU 76. Communication unit 71
Performs data transmission / reception with the wireless system control unit 60. The logic unit 72 performs an actual signal conversion process. CPU76
Controls each unit based on a program stored in the ROM 75 and performs various arithmetic processes. RAM 74 is
The data is temporarily stored, and operates as a work RAM of the CPU 76. The LAN interface unit 73 is connected to the LAN to transmit and receive signals.

Each of the mobile radio terminals PS1 to PSc in FIG.
It corresponds to a so-called slave unit of a cordless telephone system, and for example, a mobile phone or a PHS can be used. Each of these mobile radio terminals PS1 to PSc is, for example, shown in FIG.
, An RF unit 81, a baseband IC unit 82,
Communication unit 83, display unit 84, RAM 85, ROM 86, C
It has a PU 87, an operation unit 88, and the like.

The RF section 81 modulates and demodulates a baseband signal to a radio frequency, amplifies a transmission / reception signal from an antenna, oscillates a carrier frequency, detects a signal level of another channel frequency, and the like. The baseband IC unit 82 performs compression / decompression of an audio signal for wireless transmission, modulation / demodulation of a connection sequence control signal with the wireless repeater CS, and synthesis / separation of an audio signal and a control signal. In the case of the mobile wireless terminal, the baseband IC unit 82 includes a microphone 90
And the speaker 89 are also connected. The communication unit 83 performs data transmission / reception processing when performing communication via the connector for external connection. The display unit 84 performs various displays such as a display of a telephone number and a telephone directory, a display of a reception status, a display of a remaining battery level, a display of an incoming call and an outgoing call, and includes, for example, a liquid crystal display. The operation unit 88 includes various keys such as a 10 key, a call start button, a power on / off button, a memory call / store button, and other catch keys provided in a normal mobile wireless terminal (for example, a mobile phone or a PHS). Buttons are provided, and by operating these buttons, input and storage of a telephone number, start of transmission, power on / off, and the like are performed. The operation unit 88 may be provided with a special number key for inputting a transfer promotion special number used for transfer described later. The CPU 87 controls each unit based on a program stored in the ROM 86, performs recognition of a call name (ID code), carrier sense processing, etc., dial signal processing, various displays on the display unit 84, and various operation and operation units. It also performs man-machine control such as capturing the state of each button of 88. The ROM 86 has a call name (ID code)
In addition, a telephone number, a telephone directory, various characters and symbol data are also stored. The RAM 85 temporarily stores data,
It operates as a work RAM of PU87.

The wired terminals DT1 to DTe in FIG. 1 are digital or analog telephone terminals connected to a LAN. In these wired terminals DT1 to DTe, it is also possible to input a transfer promotion special number and a transfer permission input described later.

FIG. 7 shows a configuration example of the wired terminals DT1 to DTe. The wired terminal DT includes a telephone control unit 140 that performs signal processing and control as a telephone, and a LAN control unit 150 that performs signal processing and control for LAN.

The telephone control unit 140 includes a display I / F unit 14
1, display unit 142, communication unit 143, RAM 144, RO
M145, CPU 146, operation I / F unit 147, operation input unit 148, A / D and D / A conversion unit 149, microphone 1
49a and a speaker 149b. Display I / F
The unit 141 is an interface unit to the display unit 142. The display unit 142 is composed of, for example, a liquid crystal display, and performs various displays such as a display of a telephone number and a telephone directory, an incoming call and an outgoing call. The operation I / F unit 147 includes the operation input unit 1
48 is an interface part. Operation input unit 148
Has 10 keys, a call start button, a power on / off button, a memory call / store button, and various other buttons provided on a normal telephone. By operating these buttons, a telephone number can be input or stored. , Transmission start, and the like. The operation input unit 148 can be provided with a special number key for inputting a transfer promotion special number used for transfer described later. A / D and D / A converter 14
9 converts the analog audio signal input from the microphone 149a into digital data, converts the digital data input through the communication unit 143 into an analog audio signal, and outputs the analog audio signal from the speaker 149b. CPU 146
Controls various units based on a program stored in the ROM 145, performs various arithmetic processes, performs dial signal processing, various displays on the display unit 142, and captures the state of each button of the operation input unit 148. It also performs man-machine control. Further, in addition to the call name (ID code), the ROM 145 stores a telephone number, a telephone directory, various characters and symbol data. The RAM 144 temporarily stores data and operates as a work RAM of the CPU 146. The communication unit 143 performs data transmission and reception with the LAN control unit 150.

The LAN controller 150 includes a communication unit 151,
A logic unit 152, a LAN interface unit 153,
It has a RAM 154, a ROM 155, and a CPU 156. The communication unit 151 transmits and receives data to and from the telephone control unit 140. The logic unit 152 performs an actual signal conversion process. The CPU 156 controls each unit based on a program stored in the ROM 155 and performs various arithmetic processes. The RAM 154 temporarily stores data,
It operates as a work RAM of U156. The LAN interface unit 153 is connected to the LAN to transmit and receive signals.

The controller 2 shown in FIG. 1 comprises, for example, a so-called personal computer or the like. For example, as shown in FIG.
3, HDD (hard disk drive) 24, FDD
(Floppy (registered trademark) disk drive) 25, R
AM26, ROM27, CPU (microprocessor)
28, a display interface 29, a display unit 30, an operation input interface 31, an operation input unit 32, and the like, which can execute management of a mobile wireless terminal group table in FIG. 9 described later and processing in a flowchart in FIG. It is.

The logic section 22 performs various signal arithmetic processing. The LAN interface unit 23 is connected to the LAN to transmit and receive signals. The HDD 24 includes a hard disk as a recording medium, and stores an OS (operating system) and a mobile wireless terminal group table shown in FIG. 9 described later.
0 stores various application software and the like for executing the processing of the flowchart of FIG. The FDD 25 has a detachable floppy disk, and performs various data recording / reproducing on the loaded floppy disk.

The CPU 28 operates based on a program stored in the ROM 27, and performs various arithmetic processing and control of each unit based on the OS and various application software read from the hard disk of the HDD 24.
The RAM 26 temporarily stores the OS and various application software read from the hard disk of the HDD 24, various data of the mobile wireless terminal group table in FIG. 9, or other data, and operates as a work RAM of the CPU 28.

The display interface 29 includes a CPU 28
Is converted into a video signal to be displayed on the display unit 30. The display unit 30 is usually a CRT (cathode ray tube) or an LCD (liquid crystal display) connected as an external device, and displays a video signal supplied via the display interface 29. Operation input unit 3
Reference numeral 2 denotes a keyboard, a mouse, and the like. Operation input signals from the keyboard and the mouse are sent to the CPU 28 via the operation input interface 31.

FIG. 8 is a block diagram showing the function of the main part of the controller 2 having such a configuration. That is,
The controller 2 refers to a group information storage unit 91 that stores group information as shown in FIG. 9 in which a plurality of mobile wireless terminals and a plurality of wired terminals are grouped, and the group information stored in the group information storage unit 91. Communication control means 92 for controlling the connection of the telephone call.

Here, in the private telephone system (digital cordless system) of this embodiment shown in FIG. 1, each mobile radio terminal PS1 to PSc and each wire terminal DT
1 to DTe are grouped, and a call that arrives at a certain mobile wireless terminal or a wired terminal is transferred from another mobile wireless terminal or a wired terminal of the same group after the incoming mobile wireless terminal or the wired terminal performs a transfer permission input. When a predetermined transfer promotion special number call is made, the call can be transferred to the mobile wireless terminal or the wired terminal that has made the transfer promotion special number call in the same group. The transfer permission input and the transfer promotion special number used in the present embodiment are as follows.
Any of inputting a predetermined number, inputting a combination of a plurality of numbers, or pressing a predetermined key may be used.

The operation of the private telephone system according to the present embodiment for realizing the above will be described with reference to a mobile radio terminal group table shown in FIG. 9 and a flowchart shown in FIG.

The mobile radio terminal group table of FIG. 9 is stored in the group information storage means 91 shown in FIG.
Is created based on application software recorded on the hard disk of the HDD 24, stored on the hard disk of the HDD 24, and further developed on the RAM 26, and belongs to each group G1, G2, G3. Mobile radio terminal PS1
ＰＳPSc. In the example of FIG. 9, nine mobile wireless terminals PS1 to PS9 exist, and the group G1
The mobile radio terminals PS1, PS2, and PS3 belong to the group G2, the mobile radio terminals PS4, PS5, and PS6 belong to the group G2, and the mobile radio terminals PS7, PS8, and PS9 belong to the group G3. Note that, in the example of FIG. 9, for simplification of description, an example in which only mobile wireless terminals are grouped is given, but actually, wired terminals are also grouped together with these mobile wireless terminals. The communication control means 92 shown in FIG.
Is executed by the CPU 28 to execute the function as the call control means 92.

The flowchart of FIG. 10 shows a control flow in the controller 2 of FIG. 1, for example, when a call is received at the mobile radio terminal PS1. Note that, in the example of FIG. 10 as well, for simplicity of explanation, only mobile radio terminals are grouped as shown in FIG. 9, and the flow of processing when the transfer destination is also a mobile radio terminal is shown. .

Here, for example, if there is an incoming call to the mobile radio terminal PS1 from the outside (which may be an extension or an outside line), the user of the mobile radio terminal PS1 responds and enters a communication state. Then, when the call is to be transferred to another person in the group, the user of the mobile radio terminal PS1 speaks to the other party to be transferred and performs a transfer permission input such as pressing a catch key. The person receiving the call can receive the call by inputting the transfer promotion special number into his / her mobile wireless terminal (for example, PS3).

The operation of the controller 2 in such a case is shown in the flowchart of FIG. 10 and will be described below. When there is an incoming call to the mobile radio terminal PS1, the mobile radio terminal PS1 is called, and when the user of the mobile radio terminal PS1 answers, the communication path is connected and the communication state is established (step S).
1). Then, when the user of the mobile radio terminal PS1 performs a transfer permission input such as pressing a catch key to transfer the call to another person in the group, the signal is detected and the call is temporarily put on hold. (Step S2 → Y).

Then, the process enters a standby state for detecting the input of the transfer promotion special number (step S3). When the transfer promotion special number input is detected (step S3 → Y), it is determined whether or not the input is from a mobile wireless terminal in the same group as the mobile wireless terminal PS1, and a mobile wireless terminal in the same group (for example, the mobile wireless terminal PS) is determined.
If it is from 3) (step S4 → Y), the call is transferred to the mobile radio terminal PS3 (step S5),
The process ends.

In the standby state for detecting the input of the transfer promotion special number (step S3), if the transfer permission input is performed again from the mobile radio terminal PS1 (step S3 → N → step S6 → Y), the hold state is released. Mobile radio terminal PS
The telephone call with No. 1 is resumed (step S1). Also, mobile wireless terminals of another group (for example, mobile wireless terminal PS5)
When the transfer promotion special number input from the terminal is detected (step S4 → N), the call is not transferred to the mobile radio terminal PS5, and the transfer promotion special number input detection standby state (step S3).
To continue.

As described above, according to the private telephone system of the present embodiment, transfer is possible within the same group without knowing the transfer destination telephone number.

Further, even if a transfer promotion special number is input from a terminal outside the group, the transfer promotion special number is not transferred, so that transfer to an unintended partner can be prevented.

The present invention is not limited to the above-described embodiment described as an example. For example, transfer from a mobile wireless terminal has been described, but the same applies to transfer from a wired terminal. Further, the mobile phone may be directly connected to a public line without using a PBX. And in addition to this,
It goes without saying that various changes can be made in accordance with the design and the like without departing from the technical concept of the present invention.

[0045]

According to the first and third aspects of the present invention, there is provided an outgoing / incoming call control method and apparatus according to the present invention, in which a transfer permission input is performed from a mobile radio terminal during a call and another mobile radio terminal in the same group. When the transfer promotion special number is input from the user, the call is transferred to the mobile radio terminal to which the transfer promotion special number has been input, so that the transfer can be made within the same group without knowing the transfer destination telephone number. As a result, there is no need to listen to or look up the telephone number of the transfer partner.

The outgoing / incoming call control method and apparatus according to the second and fourth aspects of the present invention can be similarly transferred within the same group even when a wired terminal is used.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall configuration example of a private telephone system (digital cordless system) according to an embodiment to which the present invention is applied.

FIG. 2 is a block diagram showing a schematic configuration of a private branch exchange (PBX).

FIG. 3 is a block diagram showing a schematic configuration of a station line interface device.

FIG. 4 is a block diagram illustrating a schematic configuration of a wireless repeater.

FIG. 5 is a block diagram illustrating a schematic configuration of a mobile wireless terminal.

FIG. 6 is a block diagram illustrating a schematic configuration of a controller.

FIG. 7 is a block diagram illustrating a schematic configuration of a wired terminal.

FIG. 8 is a block diagram for explaining functions of main parts of the controller.

FIG. 9 is a diagram showing a mobile wireless terminal group table.

FIG. 10 is a flowchart showing a control flow in a controller.

[Explanation of symbols]

1 PBX, 2 controller, I / F1 to I / Fb
Office line interface device, PS1 to PSc: mobile radio terminal, CS1 to CSd: radio repeater, DT1 to DTe ...
Wired terminal

Continued on the front page F term (reference) 5K015 AA00 AB00 AF05 KA04 KA09 KA12 5K049 AA16 AA17 BB07 BB16 BB23 CC04 EE15 FF01 FF36 FF39 GG07 5K067 AA34 BB08 BB44 DD17 EE02 EE10 FF07 HH01 HHH HHH

Claims (4)

[Claims] At least one of a plurality of central office interface devices, a plurality of wireless repeaters, a plurality of mobile wireless terminals connected to the wireless repeaters via wireless sections, and a controller for controlling the entire system is provided. And, in the outgoing / incoming call control method for controlling the outgoing / incoming call of the private telephone system in which each device except the plurality of mobile wireless terminals is connected by a narrow area network, the plurality of mobile wireless terminals are grouped, When the transfer is performed within the above, a transfer permission input is performed from the mobile radio terminal during the call,
When a transfer promotion special number is input from another mobile radio terminal in the same group, a call is transferred to the mobile radio terminal to which the transfer promotion special number has been input. 2. A plurality of station line interface devices, a plurality of wireless repeaters, a plurality of mobile wireless terminals connected to the wireless repeaters via wireless sections, a plurality of wired terminals, and control of the entire system. And at least a controller,
An incoming / outgoing call control method for controlling an incoming / outgoing call of a private telephone system in which devices other than the plurality of mobile wireless terminals are connected via a narrow area network, wherein the plurality of mobile wireless terminals and the plurality of wired terminals are grouped. When performing transfer within this group, a transfer permission input is performed from the mobile wireless terminal or the wired terminal during a call, and a transfer promotion special number is input from another mobile wireless terminal or the wired terminal in the same group. Is performed, the call is transferred to the mobile wireless terminal or the wired terminal to which the transfer promotion special number has been input. 3. A system comprising at least a plurality of central office interface devices, a plurality of wireless repeaters, a plurality of mobile wireless terminals connected to the wireless repeaters via wireless sections, and a controller for controlling the entire system. A call control device for controlling a call originating and terminating in a private telephone system in which devices other than the plurality of mobile radio terminals are connected via a short area network, wherein the controller groups the plurality of mobile radio terminals; Group information storing means for storing the group information obtained by the transfer, and when a transfer permission input is performed from the mobile radio terminal during a call, the call is put on hold, and the other mobiles in the same group in which the transfer promotion special number is input A call control unit for transferring the call to a wireless terminal. 4. A plurality of station line interface devices, a plurality of wireless repeaters, a plurality of mobile wireless terminals connected to the wireless repeaters via wireless sections, a plurality of wired terminals, and control the entire system. And at least a controller,
In an incoming / outgoing call control device for controlling an incoming / outgoing call of a private telephone system in which devices other than the plurality of mobile wireless terminals are connected via a short area network, the controller comprises: the plurality of mobile wireless terminals and the plurality of wired lines Group information storage means for storing group information obtained by grouping terminals; and when a transfer permission input is performed from the mobile radio terminal or the wired terminal during a call, the call is put on hold, and a transfer promotion special number is input. A call control unit for transferring the call to another of the mobile wireless terminals or the wired terminals in the same group.