JP2000295647A - Private branch exchange - Google Patents

Abstract

(57) [Abstract] (with revisions) [Problem] To minimize the cost increase of the system
AN can be accommodated. A key telephone main unit 1A has a router unit 14A.
, And the external line interface function and the independent power supply function are deleted from the router unit 14A.
These functions are performed by using the external line interface units 11 and 12 and the power supply unit 18 already provided in the key telephone main unit 1A.
Substitute by An external line interface unit connectable to an external line and a router unit connectable to a local area network are exchanged and connected by an exchange connection control unit.

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 such as a key telephone system, and more particularly to a private branch exchange system for multimedia capable of handling various data such as IP (Internet Protocol) in addition to voice signals. About.

[0002]

2. Description of the Related Art Conventionally, key telephone systems are often used in office buildings and offices. And recently, as an extended type, not only audio signals from telephone terminals,
2. Description of the Related Art A multimedia-compatible key telephone system capable of handling various data such as IP (Internet Protocol) has been proposed.

However, in this type of conventional system, for example, a dedicated router is provided separately from a key telephone main unit, and a LAN (Local Area Network) is provided via the dedicated router.
The data terminal connected to k) is connected to the key telephone main unit. For this reason, a dedicated router and a dedicated interface unit for the main device must be separately prepared for connection to the LAN, which increases the economic burden on the user.

[0004]

As described above, a multimedia-compatible key telephone system which has been conventionally considered is as follows.
In order to accommodate the LAN, it is necessary to separately install a dedicated router and a dedicated interface unit for the main device, so that there is a problem that the cost of the system is increased.

When the router is a general dial-up router, an ISDN is newly added in addition to the key telephone main unit.
It is necessary to draw a line or prepare a dedicated ISDN extension interface unit for key telephones.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a private branch exchange which is capable of accommodating a LAN while minimizing an increase in system cost.

[0007]

In order to achieve the above object, a private branch exchange according to the present invention comprises an external line interface unit connectable to an external line, a router unit connectable to a local area network, and the router unit. Switching connection means for switching connection between the external area interface means and the external line interface means, and switching connection control means. When a packet signal is transmitted from the local area network or an external line, the switching connection control means causes the router means to And the exchange connection means is controlled so as to exchange connection with the external line interface means.

The present invention is also characterized in that the router unit is provided with a protocol conversion unit for connecting a data terminal connected to the local area network to an external interface unit in the switching unit directly by an internal control interface. I have. In this way, when a plurality of data terminals are connected to the local area network, all data transfer between these data terminals and each unit in the switching device can be interfaced by the router unit. Become. As a result, there is no need to provide an interface function with the switching device for each data terminal, thereby reducing the burden on the data terminal user.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 is a block diagram showing an embodiment of a multimedia key telephone system according to the present invention. The device is shown.

The key telephone main unit 1A includes a plurality of types of external line interface units (BRI) (PRI) 11, 12, a line interface unit (DKU / STU) 13, a time switch unit (TSW) 15, a central control unit. (CTU)
17 which are interconnected via a voice bus (PCMHW) 19 and a control bus (DHW) 20.

The external line interface (BRI) 11
Subscriber line ISL corresponding to SDN basic interface
Is connected to the ISDN public network NW via the network, and performs a process of establishing a call with the ISDN public network NW according to the basic interface. The external line interface unit (PRI) 12
Subscriber line AS corresponding to primary interface of SDN
It is connected to the ISDN public network NW via L, and controls establishment of a call with the ISDN public network NW according to the primary group interface.

The line interface section 13 accommodates a plurality of extensions EL1 to ELm.
Extension terminals T1 to Tm are connected to 1 to ELm, respectively. The extension terminals T1 to Tm include, for example, a digital key telephone, an analog telephone, and a facsimile machine.
An analog terminal such as an analog telephone or a facsimile machine is connected to the STU. The DKU performs outgoing / incoming processing for digital key telephones, digital signal transfer processing, and the like. The STU performs an outgoing / incoming process for an analog terminal and also performs an analog / digital conversion process of a signal.

The time switch unit 15 includes a central control unit 17
In accordance with the instruction of the above, each of the external line interface units 11 and 12
A channel exchange of digital signals transmitted via the audio bus 19 is performed between the digital interface and the line interface unit 13. Reference numeral 18 denotes a power supply unit which outputs commercial power (AC1
00V) to generate a required DC power supply voltage Vcc,
This DC power supply voltage Vcc is supplied to all circuit units in the apparatus including a router unit to be described later.

The key telephone main unit 1A of the first embodiment has a built-in router 14A and a computer connection interface (PC I / F) 16A. The router unit 14A includes a LAN interface unit (LA)
(N I / F) 141, a protocol conversion unit 142, and a control unit (CONT) 143.

The LAN interface unit 141 is connected to a LAN 2 constituted by, for example, 100 BASE-T Ethernet (registered trademark), and a plurality of data terminals PC1 including personal computers via the LAN 2.
To PCn. The protocol converter 142 has a time slot assigner. In this time slot assigner, an ISDN generated by the control unit 143 for communicating data of LAN2 via ISDN.
The conversion between the layer 2 protocol and the layer 2 protocol for the extension control interface of the key telephone main unit 1A is performed. By this protocol conversion, LAN2
Can be connected to the audio bus 19 and the control bus 20 of the key telephone main unit 1A. The control unit 14
3 has a PPP (Point-to-Point) connection function, whereby the data terminals PC1 to PCn connected to the LAN2.
Can be connected to the Internet IN and the intranet ITN via the ISDN public network NW. The control unit 143 includes a routing table, and refers to the routing table to refer to the data terminals PC1 to PC1.
It performs routing processing of packets transmitted between PCn and the ISDN public network NW.

Computer connection interface 16A
Has a personal computer for CTI (CTI P
C) 3A is connected. The computer connection interface 16A is a personal computer 3A for CTI.
A function of performing digital audio signal transfer processing between the digital bus and the audio bus 19;
A function of transferring control commands and the like to and from the computer 3A.

FIG. 2 is a schematic diagram showing the connection between the CTI personal computer 3A and the key telephone main unit 1A. The CTI personal computer 3A includes a PC control unit 31 having a microcomputer as a main control unit, and a plurality of PCM processing units 321, 322,.
, A key telephone connection interface unit 33, and a PC power supply unit 34. A PC audio bus is provided between the PC control unit 31, each of the PCM processing units 321, 322,. 35 and a PC control bus 36.

Each of the PCM processing units 321, 322,
... are used for CTI such as voice compression encoding or voice expansion / decoding processing, voice synthesis processing, DTMF signal detection processing, facsimile signal processing, and modem signal processing of the digital voice signal transferred from the key telephone main unit 1A. Perform various necessary processes.

On the other hand, the PC control unit 31, the key telephone connection interface unit 33, and the PC power supply unit 34 are configured as follows. FIG. 3 is a circuit block diagram showing the configuration. The CTI personal computer 3A is provided with an in-cabinet cooling fan monitoring unit 37 and an in-cabinet temperature sensor 38. The in-cabinet cooling fan monitoring unit 37 monitors the operating state of the cooling fan and outputs the monitoring information. Cabinet temperature sensor 38
Outputs temperature detection information indicating the temperature in the cabinet.

The PC power supply section 34 includes a regulation section 341, an output monitoring section 342, a temperature sensor 343,
An output control unit 344 is provided. The regulation unit 341 provides a required operation power supply voltage Vc based on the commercial power supply output.
c is generated and supplied to each unit in the CTI personal computer 3A. The output monitoring unit 342 monitors the value of the operating power supply voltage Vcc and outputs monitoring information. The temperature sensor 343 detects the temperature inside the PC power supply unit 34 and outputs the temperature detection information. The output control unit 344 controls the operation of the regulation unit 341 according to an instruction from the PC control unit 31 described later.

The PC control unit 31 includes a CPU 311, a chip set 312, a CPU temperature sensor 313,
And a cooling fan monitoring unit 314. CPU311
Controls the operation of the personal computer 3A, and transmits and receives the control signals to and from the chipset 31.
2 through. The CPU temperature sensor 313 monitors the temperature of the CPU and outputs detection information. The CPU cooling fan monitoring unit 314 monitors the operation state of the CPU cooling fan and outputs the monitoring information.

The key telephone connection interface unit 33 includes:
It has a data transmission unit 332, a data reception unit 333, and a control unit 334, and performs digital audio signal transfer processing and control data transfer processing with the computer connection interface unit 16A of the key telephone main unit 1A. . The key telephone connection interface section 33 is provided with a state monitoring section 331. This state monitoring unit 331
Are monitoring information of the cooling fan monitoring unit 37 in the cabinet, temperature detection information of the temperature sensor 38 in the cabinet, monitoring information of the operating power supply voltage Vcc, temperature detection information of the temperature sensor 343 in the PC power supply unit 34, and the CPU temperature sensor 313.
And the monitoring information of the CPU cooling fan monitoring unit 314 are fetched and accumulated. For example, each time a request for sending monitoring data arrives from the key telephone main unit 1A, the data transmitting unit 332 uses the latest monitoring information at that time as state monitoring data from the key telephone main unit 1A.
Send to A

On the other hand, the central control unit 17 of the key telephone main unit 1A has an abnormality determination function for determining an abnormal state of the CTI personal computer 3A, an abnormality display control function, and an abnormality response control function. .

The abnormality determining function transmits a request for sending monitoring data to the CTI personal computer 3A at regular time intervals, and responds to this request to send the status monitoring data sent from the CTI personal computer 3A. Receive. Then, based on the received state monitoring data, it is determined whether or not the power supply voltage value Vcc abnormality, the cooling fan abnormality, or the abnormal temperature rise has occurred in the CTI personal computer 3A.
The abnormality display control function, when the various abnormalities are detected by the abnormality determination function, sends display data indicating the details of the detected abnormal state to a specific key telephone or a relay console for display.

The abnormality handling control function is an operation stop command from the specific key telephone set when any of the abnormality of the power supply voltage Vcc, the abnormality of the cooling fan, or the abnormal temperature rise is detected by the abnormality determination function. Alternatively, when a restart instruction is input, one of the following three types of operations is performed. (1) A stop command is sent to the CTI personal computer 3A to stop the operation. (2)
A restart command is sent to the CTI personal computer 3A to restart the operation. (3) Output control unit 34
An output stop command is sent to the CPU 4 to stop the output of the PC power supply unit 34 and stop the operation of the CTI personal computer 3A.

The central control unit 1 of the key telephone main unit 1A
7 is provided with a function for monitoring the recovery of the CTI personal computer 3A. This recovery monitoring function determines whether or not the CTI personal computer 3A has recovered by periodically monitoring the operating state of the CTI personal computer 3A in the stopped state. Then, when the abnormality recovery is detected, the CTI processing using the CTI personal computer 3A is restarted.

Next, the operation of the system configured as described above will be described. First, a case where a data terminal connected to the LAN 2 performs data communication via the Internet will be described.

For example, it is assumed that a user performs an operation for performing data communication with a desired communication partner via the Internet IN at the data terminal PC1. Then, data terminal PC1 transmits a connect message to key telephone apparatus 1A according to the TCP / IP protocol. This connect message is received by the router unit 14A of the key telephone main unit 1A via the LAN 2.

Upon receiving the connect message, the router unit 14A executes a procedure for setting up a communication connection by a PPP connection with a partner terminal connected on the Internet IN. Among the parts related to the connection of the ISDN line, the procedure for setting the communication connection is performed with the ISDN public network NW via the control bus 20 and the external line interface unit 11 in the key telephone main unit 1A. That is, the external line interface unit 11 is originally used to connect between the extension terminals T1 to Tm such as key telephones and the ISDN public network NW. In this embodiment, however, the external line interface unit 11 connects the router unit 14A and the ISDN public network NW. Also used to connect between. The connection procedure for the Internet is based on the PCM in the key telephone main unit 1A.
The communication is performed with a provider (not shown) via the bus 20, the external line interface unit 11, and the ISDN public network NW.

In the communication connection setting procedure, the router unit 14A transmits a connect message to the partner terminal of the Internet IN according to the TCP / IP protocol. By sending this connect message,
Processing for setting a TCP / IP connection is performed between the data terminal PC1 of the transmission source and the Internet IN. As a result, a communication connection is established between the internal data terminal of the transmission source and the partner terminal on the Internet IN, and thereafter, data communication between the data terminal PC1 and the partner terminal is possible via the Internet IN. Become.

Next, a communication operation using the CTI personal computer 3A will be described. Now, for example, it is assumed that data communication is being performed between the extension terminal T1 and an outside line terminal connected to the ISDN public network NW. In this case, the digital audio signal transmitted from the extension terminal T1 is received by the line interface unit 13 and then transmitted via the audio bus 19 to the computer connection interface unit 1.
6A, and sent from the computer connection interface 16A to the CTI personal computer 3A. This CTI personal computer 3A
Then, voice compression encoding of the digital voice signal is performed. This encoded digital audio signal is
After being returned from the personal computer 3A to the computer connection interface 16A and transferred from the computer connection interface 16A to the external line interface 11 via the audio bus 19, the ISD
It is sent to the outside line terminal of the communication partner via N public network NW.
The voice signal transmitted from the outside line terminal is transferred to the extension terminal T1 via a route opposite to the above route.

By the way, during the execution of such CTI, in the system of the present embodiment, the following abnormality judgment and response control is performed for the CTI personal computer 3A. FIG. 4 is a flowchart showing the control procedure and control contents.

That is, in the CTI personal computer 3A, the temperature in the cabinet, the operating state of the cooling fan, the temperature of the PC power supply unit 34 and the operating power supply voltage Vc
c, The CPU temperature in the PC control unit 31 and the operation state of the CPU cooling fan are detected and collected in the state monitoring unit 331 of the key telephone connection interface unit 33. The status monitoring unit 331 stores the collected monitoring data.

On the other hand, the key telephone main unit 1A periodically generates a monitoring data transmission request in the central control unit 17, and transmits the transmission request from the computer connection interface unit 16A to the CTI personal computer 3A.
Send to A. (Step 4a). When this monitoring data transmission request arrives, the CTI personal computer 3A reads out and encodes the latest monitoring data from the stored monitoring data by the key telephone connection interface unit 33, and then transmits it to the key telephone telephone main unit 1A. I do.

Central control unit 17 of key telephone main unit 1A
Monitors the arrival of monitoring data from the CTI personal computer 3A in step 4b while monitoring the passage of time in step 4c after transmission of the monitoring data transmission request. When the monitoring data arrives within a certain time after the transmission of the monitoring data transmission request, the received monitoring data is analyzed in step 4d, and the CTI personal computer 3 is analyzed in step 4e based on the analysis result.
It is determined whether an abnormality has occurred in A. If no abnormality has occurred, the control is terminated as it is, the process returns to step 4a, and the above abnormality determination control is repeated.

On the other hand, it is assumed that some abnormality has occurred in the CTI personal computer 3A. In this case, in step 4f, the central control unit 17 of the key telephone main unit 1A sends and displays abnormal display data to a specific extension terminal (for example, Tm) composed of a key telephone. This abnormality display data is based on the monitoring data sent from the CTI personal computer 3A.
The content of the abnormality is edited so that the user can easily recognize it, and includes, for example, a mark indicating the type of the abnormality and a brief description.

It should be noted that the abnormal display data may not only be displayed visually, but may also use an audio message to notify the occurrence of the abnormality by using a voice synthesizing means. In addition, the extension terminal Tm for displaying the display data may be a relay console in addition to the key telephone.

After transmitting the abnormal display data, the central control unit 17 of the key telephone main unit 1A proceeds to step 4g, where it sends an operation stop command to the CTI personal computer 3A to stop the CTI processing.

On the other hand, in the CTI personal computer 3A, for example, when the operating system or a program runs away, the CTI personal computer 3A does not transmit the monitoring data even if the key telephone main unit 1A sends a monitoring data transmission request. In this case, the central control unit 17 of the key telephone main unit 1A shifts from step 4c to step 4d when a certain period of time has elapsed after the transmission of the monitoring data transmission request, and since the monitoring data does not arrive here, the operating system or It is determined that a program runaway has occurred, and display data to that effect is sent to a specific extension terminal Tm for display.

When a predetermined time elapses after the display data for displaying the occurrence of an abnormality has been transmitted, the central control unit 17 executes the CTI operation.
A restart command is sent to the personal computer 3A to restart the computer. Thus, CT
The I personal computer 3A is restored to a normal state.

As described above, in the first embodiment, the router unit 14A is incorporated in the key telephone main unit 1A, and the external line interface function for ISDN and the independent power supply function are deleted from the router unit 14A. Thus, these functions are substituted by the external line interface units 11, 12 and the power supply unit 18 already provided in the key telephone main unit 1A. That is, the existing external line interface units 11 and 12 and the power supply unit 18 are shared by the router unit 14A.

Therefore, the LAN can be accommodated in the key telephone system without preparing a router separately.
In addition, the router is not simply built in the key telephone main unit 1A, but the external line interface function and the power supply function necessary for the router are provided by the external line interface units 11 and 12 and the power supply which are already provided in the key telephone main unit 1A. By having shared by part 18,
As a highly reliable multimedia information communication system, the key telephone main unit 1A can be configured to be relatively simple and small.

The protocol conversion section 142 of the router section 14A is provided with an interface function including a protocol conversion function for directly connecting the router section 14A to the voice bus 19 and the control bus 20 in the key telephone main unit 1A. Therefore, it is not necessary to provide the interface function on the key telephone main unit 1A side.

Further, in the first embodiment, in the CTI personal computer 3A, the temperature in the cabinet and the operation state of the cooling fan, the temperature of the PC power supply unit 34 and the operation power supply voltage Vcc, the CPU temperature in the PC control unit 31 By detecting the operating states of the CPU cooling fan and the CPU cooling fan, respectively, and transmitting and analyzing these monitoring data to the key telephone main unit 1A, an abnormality of the CTI personal computer 3A is detected and necessary countermeasures are taken. I have to.

Therefore, the CTI personal computer 3A uses an expensive computer such as a server or factory computer designed to be highly reliable so that even if an abnormality occurs, the entire switching system is not affected. It is not necessary, and an inexpensive general-purpose personal computer can be used.

The CTI personal computer 3
Transfer of monitoring data from A to the key telephone device 1A,
This is performed in response to a transmission request from the key telephone main unit 1A. If the key telephone main unit 1A cannot receive monitoring data even after a certain period of time, the program or OS has run away in the CTI personal computer 3A. And restart it. For this reason, the key telephone main unit 1A can also determine whether the CTI personal computer 3A has runaway when performing the monitoring data reception analysis work. Can be dealt with immediately.

Further, when an abnormality of the CTI personal computer 3A is detected by analyzing the monitoring data in the key telephone main unit 1A, display data representing the details of the abnormality is created and sent to a specific extension terminal Tm. Is displayed. For this reason, for example, a maintenance user of the system can be notified of the status of the operation abnormality that has occurred in the CTI personal computer 3A. It is possible to take a reliable response.

(Second Embodiment) In a second embodiment of the present invention, in a key telephone main unit, a CTI personal computer is connected to a router unit via a LAN connected to the router unit. Thus, transmission data transmitted from a CTI personal computer can be communicated via the Internet.

FIG. 5 is a circuit block diagram showing a configuration of a digital key telephone system according to the second embodiment. In this figure, the same parts as those in FIG. 1 are denoted by the same reference numerals, and detailed description is omitted. The router unit 14B has the same configuration as the router unit 14A of FIG. 1 described above.

A computer connection interface (PCI / F) 16B provided in the key telephone main unit 1B has an internal interface function for transferring data with other circuit units in the key telephone main unit 1B. , CTI
A computer interface function for transmitting data to and from the personal computer (CTI PC) 3B is provided.

In such a configuration, for example, when a voice packet addressed to the extension terminal T 1 arrives via the Internet IN and the ISDN public network NW, the voice packet is received by the external interface unit 11 and then transmitted via the voice bus 19. The router 14B receives the CTI from the router 14B via the LAN 2 and the cable 25.
To the personal computer 3B, where the voice data is temporarily stored, for example, as a voice mail.

At the time of transmission to the extension terminal T1, the voice packet is transmitted to the CTI personal computer 3B.
After that, it is sent to the computer connection interface unit 16B of the key telephone main unit 1B via the computer connection interface 24. Then, the data is transferred from the computer connection interface unit 16B to the line interface unit 13 via the audio bus 19 and the time switch 15, and is sent from the line interface unit 13 to the extension terminal T1 of the destination.

Also, when transmitting voice data as IP packets from the extension terminals T1 to Tm to the Internet IN, the data is also transmitted to the Internet IN via a route opposite to the route described above. That is, the voice data transmitted from the extension terminal is transmitted from the computer connection interface unit 16B to the CTI personal computer 3B.
, Where the voice encoding process is performed. Then, the CTI personal computer 3B
After voice data is packetized according to the CP / IP protocol, it is transferred to the router 14B,
Is transmitted to the ISDN public network NW through the external line interface unit 11 from the Internet.

As described above, according to the second embodiment, CT
The I personal computer 3B and the router unit 14B can be connected via the LAN 2 and the LAN cable 25, thereby performing Internet telephone or facsimile communication via the Internet using the extension terminals T1 to Tm. It becomes possible.

(Third Embodiment) In a third embodiment of the present invention, in a digital key telephone system not using a CTI personal computer, a PCM processing unit is provided in the key telephone main unit 1C, and the PCM processing is performed. The PCM processing section is provided with a LAN interface function in place of a CTI personal computer in place of the CTI personal computer, and is connected to the router section 14C via the internal LAN cable 21 by this function. It is composed.

FIG. 6 is a circuit block diagram showing a configuration of a digital key telephone system according to a third embodiment of the present invention. 1 and 2 shown in FIG.
The same reference numerals are given to the same parts as in FIG.

The hub 141C is built in the router 14C. The PCM processing unit 22 is, for example, a DSP board, and has a telephony gateway function having a PCM encoding function and a LAN connection protocol control function (H.323), a facsimile modem function, a file conversion function, and a facsimile function having a file management function. It has a service function. Also, this PCM
Between the processing unit 22 and the router unit 14C, 10BASE-
It is connected via an internal LAN cable 21 for T.

With such a configuration, the extension terminal T1
The data transmitted between .about.Tm and the Internet IN is subjected to processing related to IP packet processing, including voice encoding and decoding, in the PCM processing unit 22, and is processed by the router unit 14C and the external interface units 11, 12. Via the Internet IN.

Accordingly, the facsimile communication using the Internet telephone or the Internet IN by the extension terminals T1 to Tm can be performed in the same manner as in the second embodiment without connecting the CTI personal computer.

(Fourth Embodiment) A fourth embodiment of the present invention relates to a personal computer for CTI.
The state monitoring unit provided in the key telephone connection interface unit is made independent as a RAS function unit, and the RAS function unit monitors the temperature inside the CTI personal computer, the operating state of the cooling fan, and the like, and uses this monitoring data as a button. The configuration is such that the data is transferred from the telephone connection interface unit to the key telephone main unit 1A.

FIG. 7 is a circuit block diagram showing a configuration of a digital key telephone system according to the fourth embodiment. 2, the same parts as those in FIG. 2 are denoted by the same reference numerals, and detailed description is omitted.

The CTI personal computer 3E has a separate R from the key telephone connection interface 33E.
An AS function unit 39 is provided. The RAS function section 39 corresponds to the state monitoring section 331 shown in FIG. 3, and includes monitoring information of the cooling fan monitoring section 37 in the cabinet, temperature detection information of the temperature sensor 38 in the cabinet, and the operating power supply voltage Vc.
The monitoring information c, the temperature detection information of the temperature sensor 343 in the PC power supply unit 34, the temperature detection information of the CPU temperature sensor 313, and the monitoring information of the CPU cooling fan monitoring unit 314 are fetched and accumulated. And the key telephone main unit 1
When a monitoring data transmission request arrives from A, the latest monitoring information is read at that time, and this information is transferred to the key telephone connection interface unit 33E as state monitoring data. The key telephone connection interface unit 33E sends the state monitoring data from the data transmission unit 332 to the key telephone main unit 1A.

With such a configuration, it is possible to convert physical data into logical data in the RAS design unit, reduce the amount of transmission data, and reduce the load on the transmission path and the central control unit 17.

(Fifth Embodiment) In the fifth embodiment of the present invention, in the key telephone main unit 1E, the monitoring data analysis / determination function provided in the central control unit is independently provided as a PC state monitoring unit. The configuration is such that status monitoring data coming from the CTI personal computer 3A is analyzed by the PC status monitoring unit 23 to determine the presence or absence of an abnormal operation.

FIG. 8 is a circuit block diagram showing a configuration of a key telephone main unit 1E according to the fifth embodiment.
2, the same parts as those in FIG. 2 are denoted by the same reference numerals, and detailed description is omitted.

The key telephone unit 1E has a central control unit 1
A PC state monitoring unit 23 is provided independently of 7E. C
The status monitoring data transferred from the TI personal computer 3A is transmitted to the computer connection interface 1
After being received at 6E, it is input to the PC status monitoring unit 23. The PC status monitoring unit 23 analyzes the received status monitoring data, and the CTI personal computer 3A stops the cooling fan or abnormally raises the temperature.
It is determined whether or not the operation power supply voltage Vcc is abnormal. This determination result is input to the central control unit 17E.

When an abnormality is detected by the PC state monitoring unit 23, the central control unit 17E creates display data representing the content, sends it to a specific extension terminal Tm, and displays it.
When a stop command is received from the specific extension terminal Tm, an operation stop command is transmitted from the computer connection interface unit 16E to the CTI personal computer 3A in accordance with the command, and the operation of the CTI personal computer 3A is performed. Stop. When the operation stop instruction command arrives within a certain time after the transmission of the display data, the central control unit 17E voluntarily creates an operation stop instruction and sends it to the CTI personal computer 3A. Stop the operation.

With such a configuration, the PC status monitoring unit 23 is provided in the key telephone main unit 1E.
By performing the analysis of the monitoring data and the abnormality determination in the above, the burden on the central control unit 17E can be reduced.

(Other Embodiments) The present invention is not limited to the above embodiments. For example, the CTI personal computer may be configured to be connected to both the computer connection interface unit and the LAN. By doing so, if a failure occurs on one path, the CTI processing can be continued using the other path.

In the above embodiments, the digital key telephone system has been described. However, the present invention can be applied to a digital private branch exchange system.

Further, in the above-described embodiment, various countermeasures against the abnormal operation of the CTI personal computer have been described.
An initialization unit for initializing an operation state of the exchange device when the abnormality monitoring unit detects an operation abnormality of the exchange device; and a standby state of the computer device until the initialization processing by the initialization unit is completed. The private branch exchange system may be provided with control means for setting the state to a state and releasing the computer apparatus from the standby state and starting it after the initialization processing is completed.

In addition, the type of extension terminal, the configuration of the key telephone main unit, the configuration of the router unit, the function of the central control unit, the CTI
Various modifications can be made to the configuration of the personal computer for use and the connection configuration thereof without departing from the scope of the present invention.

[0073]

As described above in detail, according to the present invention, a router for connecting to a local area network is incorporated in a switching device, and this router is provided with an interface function with a local area network. Make up.

Therefore, according to the present invention, it is not necessary to install a router separately from the switching device, so that a relatively small and inexpensive device can be provided.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a first embodiment of a digital key telephone system according to the present invention.

FIG. 2 is a circuit block diagram illustrating a main configuration of the system illustrated in FIG. 1;

FIG. 3 is a circuit book diagram showing a configuration of the CTI personal computer shown in FIG. 2;

FIG. 4 is a flowchart showing a procedure and contents of PC abnormality determination / correspondence control by a central control unit of the key telephone main unit.

FIG. 5 is a circuit block diagram showing a second embodiment of the digital key telephone system according to the present invention.

FIG. 6 is a circuit block diagram showing a third embodiment of the digital key telephone system according to the present invention.

FIG. 7 is a main part configuration diagram showing a fourth embodiment of the digital key telephone system according to the present invention.

FIG. 8 is a main part configuration diagram showing a fifth embodiment of the digital key telephone system according to the present invention.

[Explanation of symbols]

1A, 1B, 1C, 1E ... key telephone main unit 2 ... LAN 3A, 3B, 3E ... personal computer for CTI (CTIPC) T1 to Tm ... extension terminal EL1 to ELm ... extension PC1 to PCn ... data terminal NW ... ISDN public Network IN: Internet ITN: Intranet 11, 12: External line interface (BRI) (PR
I) 13: Line interface unit (DKU / STU) 14A, 14B, 14C: Router unit 15: Time switch unit (TSW) 16A, 16B, 16E: Computer connection interface unit (PCI / F) 17, 17E: Central control unit (CTU) 18 Power supply unit 19 Voice bus (PCMHW) 20 Control bus (DHW) 21 Internal LAN cable 22 PCM processing unit 23 PC status monitoring unit 24 Computer connection interface 25 LAN cable 31 PC control Units 321, 322, PCM processing unit 33, 33E Button telephone connection interface unit 34 PC power supply unit 35 PC audio bus 36 PC control bus 37 Cooling fan monitoring unit inside cabinet 38 Temperature sensor 39 inside cabinet 39 RAS Function unit 311 CPU 312 Chipset 313 ... CPU temperature sensor 314 ... CPU cooling fan monitoring unit 331 ... state monitoring portion 332 ... data transmission section 333 ... data receiving section 334 ... control unit 341 ... regulation portion 342 ... output monitoring unit 343 ... temperature sensor 344 ... output controller

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04Q 3/545 H04L 13/00 305B (72) Inventor Hiroshi Asada 3-1-1, Asahigaoka, Hino City, Tokyo 21 Toshiba Communication Technology Corporation

Claims (5)

[Claims] 1. An external line interface unit connectable to an external line, a router unit connectable to a local area network, an exchange connection unit for exchanging and connecting the router unit and the external line interface unit, and the local area network or an external line. A private branch exchange device comprising: a switching connection control means for controlling the switching connection means so as to switch and connect the router means and the external line interface means when a packet signal is transmitted from the private branch exchange. 2. The apparatus according to claim 1, further comprising protocol conversion means for converting a packet signal sent from the local area network or an external line into a signal that can be handled by a private branch exchange. Private branch exchange. 3. A private branch exchange in which an extension terminal is connected to an extension, external line interface means connectable to an external line, and when a voice packet signal is sent via the external line interface means, the voice packet signal is routed. Router means for performing, when the voice packet signal is received from the router means by routing in the router means, voice decoding means for decoding the voice packet signal into a voice signal, and the voice signal to the extension terminal A private branch exchange device comprising: an extension terminal transmitting means for transmitting. 4. A private branch exchange in which an extension terminal is connected to an extension, external line interface means connectable to an outside line, and when a speech signal is sent from the extension terminal, the speech signal is converted into a speech packet signal. A private branch exchange comprising: voice encoding means for encoding; and router means for routing the voice packet signal voice-encoded by the voice encoding means to the external interface means. 5. The private branch exchange according to claim 3, further comprising protocol conversion means for converting a protocol of a packet signal transmitted from the communication network or an external line.