JPH11252601A - Private branch exchange system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable communication line setting with an extension terminal device connected to a private branch exchange without the intervention of a telephone operator by providing the private branch exchange and a line wire terminal device with a control signal converting part that transmits and receives the signal of an extension number to/from a line designated in an ISDN line and making the private branch exchange switch and connect to an extension corresponding to the extension number received and outputted by the control signal converting part. SOLUTION: When an extension calling button in a button part 27 is pressed down, a controlling part 19 in a remote extension telephone set 4 sends the telephone number of a private branch exchange 2 as a call out of both B1 and B2 channels to an ISDN network 18 through an ISDN network controlling part 20 and a network interface part 26 in the set 4. The network 18 sends an incoming signal to a network interface part 13 of the exchange 2, the incoming signal goes through an IDSN network controlling part 9 and is transferred to a controlling part 5, the part 5 sends a response signal, the response signal goes through the parts 9 and 13 and is transferred to the network 18 and calls of both B1 and B2 channels are established.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange system for performing exchange connection between extension terminal devices and terminal devices connected to a public communication network.

[0002]

2. Description of the Related Art An example of a conventional private branch exchange system will be described with reference to FIG. Private branch exchanges 40 provided in premises such as offices include terminal devices 41A, 41B to 41N such as extension telephones and personal computers, a filing system 42,
The computer 43 is connected.

An extension is assigned to each of the terminals 41A to 41N, the filing system 42, and the computer 43. When the extension is dialed from the terminal, the private branch exchange 40 switches to the terminal corresponding to the dialed extension. Connecting.

The private branch exchange 40 is connected to a public communication network 44 via a communication line 45, and mutual connection is established between the private branch exchange 40 and a terminal 46 connected to the public communication network 44 by dialing a telephone number.

[0005]

In the private branch exchange system, when the extension terminal devices 41A to 41N communicate with the terminal device 46 connected to the public communication network 44, for example, dialing 0 will cause the configuration exchange 40 to A vacant line in the communication line 45 connected to the public communication network 44 is selected and connected to the public communication network 44.
The terminal device 46 is connected by dialing the telephone number 6.

[0006] When the terminal equipment 46 connected to the public communication network 44 communicates with the extension terminal equipment 41A, the terminal equipment 46 first dials a telephone number and connects to the private branch exchange 40. When connected to the private branch exchange 40,
The private branch exchange 40 is connected to a specific telephone (reception telephone), and subsequently, when an extension number is transmitted from the terminal equipment 46, the exchange dials the extension number, and the private branch exchange 40 connects the target terminal equipment 41A to the incoming line. A change is made, and a communication line is set between the terminal device 46 and the terminal device 41A.

In this case, the terminal equipment 46 and the terminal equipment 41
If A is both a telephone and a telephone communication, a communication line can be set up even if the line connection is changed by an exchange in the middle, though the time until the start of the call is long.

However, if the terminal device is not a telephone,
After first setting up the communication line using the telephone, it is necessary to change the connection between the telephone connected to the set communication line and the terminal device. It took a long time.

[0009] At present, telecommuting is frequently performed, and in many cases, a private branch exchange in a company is accessed from a remote location to connect to a filing system 42 or a computer 43 to execute necessary processing. When outside of working hours, it was not possible to connect to extension telephones, nor to filing systems and computers.

An object of the present invention is to provide a private branch exchange system in which a communication line can be set up with a terminal directly connected to a private branch exchange from a terminal connected to a public communication network.

[0011]

In order to solve the above-mentioned problems, the invention according to claim 1 connects between extension terminal devices installed on premises or a data processing system such as a computer and a public communication network. In a private branch exchange system configured by a private branch exchange that exchanges and connects with the external line terminal device, the public communication network is an ISDN network, the private branch exchange and the external terminal device are ISDN-compliant, and the private branch exchange and the private branch exchange A control signal converter for transmitting / receiving an extension number signal to / from a designated line in the ISDN line is provided to the external line terminal equipment, and the private branch exchange is switched to an extension corresponding to the extension number received and output from the control signal converter. It is characterized by doing.

According to a second aspect of the present invention, a predetermined signal is transmitted from the external line terminal equipment to the private branch exchange, and the private branch exchange establishes an exchange connection when the predetermined signal is received. Suspending and switching to an extension corresponding to the extension number received and output from the control signal converter.

According to a third aspect of the present invention, when an incoming call occurs on a specific line of the private branch exchange connected to the public communication network, the exchange connection is suspended, and the extension received and output from the control signal converter is output. The connection is switched to the extension corresponding to the number.

According to a fourth aspect of the present invention, there is provided a private branch exchange for connecting and connecting extension terminals installed in a premises or between a data processing system such as a computer and an external terminal connected to a public communication network. In the private branch exchange system that is configured, an MF dial transmitter that transmits an MF dial signal to the external line terminal device is provided, and an MF dial receiver that receives a dial signal from the MF dial transmitter is provided in the private branch exchange, The private branch exchange switches and connects to an extension corresponding to an extension number received and output from the MF dial receiver.

According to a fifth aspect of the present invention, when an incoming call occurs on a specific line of the private branch exchange connected to the public communication network, the exchange connection is suspended and the extension received and output from the MF dial receiver is output. The connection is switched to the extension corresponding to the number.

According to the first aspect of the present invention, the private branch exchange and the external terminal equipment connected to the public communication network have
A control signal converter for transmitting / receiving an extension number signal to an independent line among SDN lines is provided. The private branch exchange switches and connects an incoming line to an extension corresponding to the extension number received and output from the control signal converter. A communication line with an extension terminal device connected to the private branch exchange can be set without the intervention of a switch.

According to the second aspect of the present invention, a predetermined signal is sent from the external line terminal equipment to the private branch exchange, and the private branch exchange, when receiving the predetermined signal, switches the connection of the incoming line. Is held and the connection is switched to the extension corresponding to the extension number received and output from the control signal conversion unit, so if there is an incoming call from the public communication network to the private branch exchange, the line connected to the exchange and the direct extension terminal equipment Can be distinguished from the line connected to.

According to the third aspect of the invention, when the external terminal equipment is directly connected to the extension terminal equipment, a specific telephone number is dialed to connect the public communication network to the private branch exchange. When an incoming call is made to the line so that the call arrives at the telephone line, the switching connection of the incoming line is suspended and the connection is switched to the extension corresponding to the extension number received and output from the control signal conversion unit. When an incoming call arrives at the private branch exchange, it is possible to distinguish a line connected to the exchange from a line directly connected to the extension terminal equipment.

According to the fourth aspect of the present invention, the external line terminal device is provided with an MF dial transmitter and the private branch exchange is provided with an MF dial receiver, and the private branch exchange has an extension corresponding to the extension number received and output from the MF dial receiver. Since the incoming line is exchanged and connected, the communication line with the terminal equipment connected to the private branch exchange can be set without the intervention of the exchange.

According to the fifth aspect of the invention, when an incoming call occurs on a specific line of the private branch exchange connected to the public communication network, the exchange connection is suspended, and the extension number received and output from the MF dial receiver is output. In this case, when a call is received from the public communication network to the private branch exchange, it is possible to distinguish between the line connected to the exchange and the line directly connected to the extension terminal.

[0021]

Next, a specific example of an embodiment of a private branch exchange system according to the present invention will be described. FIG. 1 is a configuration diagram of a first embodiment of the present invention. A private branch exchange 2 is installed at the business establishment 1. At the telecommuter's home 3, a remote extension telephone 4 is installed.

The private branch exchange 2 comprises a control unit 5, a time division switch 6, an ISDN network interface unit 7, and an extension telephone interface unit 8. The ISDN network interface unit 7 includes: an ISDN network control unit 9;
It comprises a 1-channel control unit 10, a B2 channel control unit 11, a control signal conversion unit 12, and a network interface unit 13. The extension telephone interface unit 8 includes an extension telephone control unit 14 and a B1 channel control unit 15.
7 is connected.

The remote extension telephone 4 has a control unit 19, an ISD
N network controller 20, B2 channel controller 21, control signal converter 22, B1 channel controller 23, codec 24,
Handset 25, network interface unit 26, button unit 27,
It comprises a display unit 28.

Network interface unit 13 of private branch exchange 2
And the network interface unit 26 of the remote extension telephone 4 is connected to the ISDN network 18. The ISDN network 18
Is connected to a general ISDN telephone 29.

The communication lines of the ISDN network include two 64-kilobit digital lines (B1 channel and B2 channel) and an 8-kilobit digital line (D channel).
Constitute one communication line, and the transmission of the telephone number to the public communication network is performed using the D channel.

Next, the remote extension telephone 4 to the extension telephone 1
7 will be described. Button section 27 in advance
A function button for calling an extension is allocated to one of the buttons. The previously determined code, which is the content of the allocation, is stored in the control unit 19 in the remote extension telephone 4. At the same time, the telephone number of the private branch exchange 2 in the ISDN 18 is also stored in the control unit 19 in the remote extension telephone 4.

When the telecommuter presses the extension call button in the button section 27, the control section 19 in the remote extension telephone 4 sets the telephone number of the private branch exchange 2 to the B1 channel and B2 channel.
The call is sent to the ISDN network 18 via the ISDN network control unit 20 and the network interface unit 26 in the remote extension telephone 4 as a call for both channels and simultaneously.

The ISDN network 18 sends an incoming signal to the network interface unit 13 of the private branch exchange 2, and the incoming signal is sent to the ISDN
The information is transmitted to the control unit 5 through the network control unit 9. Upon receiving the incoming signal, the control unit 5 sends a response signal. The response signal is IS
ISD through the DN network control unit 9 and network interface unit 13
The call is transmitted to the N network 18, and the call on both the B1 channel and the B2 channel is established.

However, in the incoming signal, as described above,
When the predetermined code is transferred, the connection to the extension telephone having the exchange is not performed, but is temporarily held. In the case of the present embodiment, since a predetermined code is transferred, the switching connection is suspended.

When the setting of the communication line between the remote extension telephone 4 and the private branch exchange 2 is completed, the telecommuter dials the extension number of the extension telephone 17 with the button 27 of the remote extension telephone 4. The extension number information is sent from the control unit 19 to the control signal conversion unit 22, and is converted into a B2 channel audio signal frame format. The converted extension number information is put on the B2 channel frame by the B2 channel control unit 21 and is transmitted from the network interface unit 26 through the ISDN network 18 to the ISD
It is sent to the B2 channel control unit 11 via the network interface unit 13 in the N network interface unit 7.
Further, it is extracted from the frame by the B2 channel control unit 11, converted from the audio signal frame format to the internal control signal format by the control signal conversion unit 12, and sent to the control unit 5.

The control unit 5 sends an incoming call notification signal to the extension telephone control unit 14. The extension telephone control unit 14 converts the incoming signal into an extension control format, and
Send to 6. The extension line interface unit 16 notifies the extension telephone 17 of the incoming call. The extension telephone 17 that received the incoming call
Is responded to by the off-hook operation or the like, a response signal is transmitted from the extension telephone 17 to the control unit 5 through the extension line interface unit 16 and the extension telephone control unit 14.

The control unit 5 converts the response signal into the control signal
2, B2 channel control unit 11, network interface unit 13
To the ISDN network 18 through ISDN network 18
Transmits a response signal to the control unit 19 through the network interface unit 26, the B2 channel control unit 21, and the control signal conversion unit 22 of the remote extension telephone 4.

The control unit 5 simultaneously controls the time division switch 6 to control the B1 channel control unit 15 in the extension telephone interface unit 8 and the B1 channel control unit in the ISDN network interface unit 7.
The connection of the one-channel control unit 10 is instructed.

On the other hand, the control unit 19 that has received the response signal
Instruct the channel control unit 23 to connect the codec 24 and the network interface unit 26. With these controls, the transmitted voice from the handset 25 is transmitted to the codec 24, the B1 channel control unit 23, the network interface unit 26, the ISDN network 1
8 through the network interface unit 13 in the ISDN network interface unit 7, the B1 channel control unit 10, the time division switch 6, the B1 channel control unit 15 in the extension telephone interface unit 8, and the extension line interface unit 16. The message is transmitted to the telephone 17. The transmission voice from the extension telephone 17 is transmitted to the handset 2 via the reverse route.
5 and the communication path between the extension telephone 17 and the remote extension telephone 4 is established.

Next, the operation of calling another general ISDN telephone 29 from the remote extension telephone 4 will be described. In the remote extension telephone 4, the general ISDN telephone 29 can be used without pressing the extension call button.
When the telephone number is dialed from the button unit 27, the control unit 19 uses the telephone number as the call information of the B1 channel according to IS.
The data is transmitted to the ISDN network 18 via the DN network control unit 20 and the network interface unit 26. The ISDN network 18 notifies the general ISDN telephone 29 of the incoming call, and when the general ISDN telephone 29 sends back a response signal, it notifies the remote extension telephone 4 of the response signal and the B1 channel call is established. At the same time, a communication path between the general ISDN telephone 29 and the remote extension telephone 4 is established.

Next, a second embodiment of the present invention will be described with reference to FIG. In the first embodiment described above, the case is performed via the ISDN communication network, but in the second embodiment, the operation is performed via the telephone network.

The private branch exchange 30 is connected to a public telephone network 31 and to remote terminal devices 32 such as telephones or personal computers, telephones 33A and 33B, a filing system 34, and a computer 35.

In the remote terminal device 32, there is provided an MF dial transmitter 32A for generating an audio frequency dial signal.

The private branch exchange 30 includes an MF dial receiver 30A for receiving a voice frequency dial signal, a switch 30B for switching connection of a communication line, and a control unit 30C.
Is provided.

The MF dial receiver 30A has a predetermined communication line 36A (a plurality of communication lines may be provided) among the communication lines 36 connecting the private branch exchange 30 and the public telephone network 31.
It is connected to the. In the public telephone network, a telephone number is assigned to each line of the communication line 36 connected to the private branch exchange 30 and the public telephone network 31. Therefore, when making a call to the communication line 36A, the telephone number of the communication line 36A may be dialed.

When a telephone number other than the telephone number corresponding to the communication line 36A in the communication line 36 is dialed from a telephone connected to the public telephone network 31, the private branch exchange 30 is set in advance as in the conventional example. The bell of the terminal equipment having the determined operator rings, and the extension is dialed by the operator to be connected to the target telephone.

When connecting directly to the extension terminal without using the exchange, a dial (not shown) of the remote terminal device 32 is operated to transmit a telephone number corresponding to the communication line 36A from the MF dial transmitter 32A.

When the telephone number is transmitted from the MF dial transmitter 32A, the public telephone network 31 connects the remote terminal device 32 and the private branch exchange 30 with the communication line 36A as a line.

When there is an incoming call on the communication line 36A, the private branch exchange 30 places the communication line 36A in an off-hook state and responds to the incoming call. However, the control unit 30C of the private branch exchange 30 suspends the exchange connection with the extension terminal equipment of the communication line 36A, and the MF
Wait for the extension number to be output from the dial receiver 30A.

When the telephone line is set, the remote terminal 3
2 operates an unillustrated dial to cause the MF dial transmitter 32A to transmit the extension number of the private branch exchange 30. The transmitted voice frequency dial signal is transmitted to the MF dial receiver 30A through the same line as the communication signal.

When the extension number is output from the MF dial receiver 30A, the control unit 30C operates the switch 30B so as to connect to the communication line 36A and the extension corresponding to the extension number, thereby obtaining a target terminal device.

In the first embodiment, as described in the second embodiment, dialing is performed so as to be connected to a specific line, and when an incoming call is made on the specific line, the connection to the extension is switched. It may be put on hold.

[0048]

According to the first aspect of the present invention, it is possible to provide a private branch exchange system capable of setting up a communication line with an extension terminal connected to a private branch exchange without using a switch.

According to the second or third aspect of the present invention, when an incoming call arrives at the private branch exchange from the public communication network, the line connected to the exchange and the line connected directly to the extension terminal are distinguished. Can be.

According to the fourth aspect of the present invention, it is possible to set a communication line with a terminal device connected to the private branch exchange without using an exchange.

According to the fifth aspect of the present invention, when an incoming call arrives at the private branch exchange from the public communication network, it is possible to distinguish a line connected to the exchange from a line directly connected to the extension terminal equipment.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of a private branch exchange system according to the present invention.

FIG. 2 is a configuration diagram of a second embodiment of the private branch exchange system according to the present invention.

FIG. 3 is a configuration diagram of a conventional private branch exchange system.

[Explanation of symbols]

 2, 30 private branch exchange 3 remote extension telephone 12, 22 control signal conversion unit 17 extension telephone 18 ISDN network 30A MF dial receiver 30B switch 30C control unit 31 public telephone network 32 remote terminal equipment

Claims (5)

[Claims] 1. A private branch exchange system comprising a private branch exchange for connecting and connecting extension terminals installed in a premises or between a data processing system such as a computer and an external terminal connected to a public communication network. In the above control, the public communication network is an ISDN network, the private branch exchange and the outside line terminal equipment are ISDN-compliant, and the private branch exchange and the outside line terminal equipment send and receive a signal of an extension number to a designated line in an ISDN line. A private branch exchange system comprising a signal conversion unit, wherein the private branch exchange switches and connects to an extension corresponding to an extension number received and output from the control signal conversion unit. 2. A predetermined signal is sent from the external line terminal equipment to the private branch exchange, and when the predetermined signal is received, the private branch exchange suspends the switching connection and outputs the control signal. 2. The private branch exchange system according to claim 1, wherein the private branch exchange system is connected to an extension corresponding to the extension number received and output from the conversion unit. 3. When an incoming call occurs on a specific line of the private branch exchange connected to the public communication network, the switching connection is suspended, and an extension corresponding to an extension number received and output from the control signal conversion unit is set. The private branch exchange system according to claim 1, wherein the private branch exchange is connected. 4. A private branch exchange system comprising a private branch exchange for exchanging connection between extension terminal devices installed on the premises or between a data processing system such as a computer and an external terminal device connected to a public communication network. , An MF dial transmitter for transmitting an MF dial signal to the external line terminal device, an MF dial receiver for receiving a dial signal from the MF dial transmitter to the private branch exchange, and wherein the private branch exchange is A private branch exchange system, which is connected to an extension corresponding to an extension number received and output from a dial receiver. 5. When an incoming call occurs on a specific line of the private branch exchange connected to the public communication network, the exchange connection is suspended and an extension corresponding to the extension number received and output from the MF dial receiver is set. The private branch exchange system according to claim 4, wherein the private branch exchange is connected.