JP2000209625A - Key telephone system and medium recording master set control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow a user using a terminal adaptor to efficiently utilize a B channel of an ISDN line through the connection of a plurality of personal computers. SOLUTION: A personal computer 103 is connected to a serial interface 18 of a terminal adaptor 102, which has a PPP/MP processing section 17 that conducts asynchronous/synchronous PPP conversion and MP processing. A master set 100 is provided with a router section 20 consisting of an external line PPP/MP processing section 7 that conducts PPP, MP processing for external line communication, of an extension PPP/MP processing 8 that conducts PPP, MP processing with the terminal adaptor 102, of a router function section 9 that conducts router processing, and a router main control section 10 that controls each of the sections 7-9. When receiving a call request from an extension telephone set 101 during communication through a 2B channel of an ISDN line by the MP communication, the router section 20 releases a 1B channel in 2 sets of B channels during the MP communication. A main control section 5 assigns the relieved 1B channel to the extension telephone set that makes a call request.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a key telephone device which is connected to an SDN line and a main device and can accommodate a plurality of data terminals such as personal computers in addition to telephones on an extension digital bus.

[0002]

2. Description of the Related Art In a conventional key telephone apparatus, when connecting a plurality of personal computers to an extension, it is necessary to install a plurality of terminal adapters on the extension and to individually connect each terminal adapter to an external line facing device. Yes, the number of ISDN line B channels for the minimum terminal adapter was required. Also, when connecting multiple PCs with a router that is an extension terminal, the PCs must be Ethernet
Connected by et, voice communication such as a telephone and data communication such as a personal computer were realized by using separate wiring. In this case, since the router has no way of knowing the calling request information of the telephone, it is necessary to determine whether to use the ISDN line 1B channel or 2B channel only according to the router setting and the data amount of the personal computer connected to the Ethernet. Had been decided.

[0003]

Therefore, in the prior art, in order to efficiently use an external line when performing data communication from a plurality of personal computers, the terminal adapter is replaced with a router, and further, the personal computers are connected. Ether for
et had to do wiring.

Also, an MP (Multilink Protocol)
l) If there is no idle B channel on the ISDN line during communication, the user has to wait for the router to finish data communication even if he wants to make a call from the telephone.

It is an object of the present invention to provide a key telephone apparatus in which a user using a terminal adapter can connect a plurality of personal computers and efficiently use the B channel of the ISDN line.

Another object of the present invention is to provide a key telephone apparatus for notifying a user that a call can be made when there is no free B channel on an ISDN line during MP communication by a router.

[0007]

In order to achieve the above object, a key telephone apparatus according to the present invention is connected to a main apparatus and has a speed conversion function of connecting a personal computer through a serial interface, an asynchronous / synchronous PPP (Point-to-Point). to-P
Point Protocol) A terminal adapter having a conversion function, and a router in the main device having an address conversion function, a routing function, and a filtering function in the main device, wherein PPP or MP is provided between the terminal adapter and the router. And the router unit connects to an external line opposing device by PPP or MP, so that one or more terminal adapters can simultaneously connect to one external line PP.
It is configured so that data communication can be performed by P and MP connections.

Therefore, a user using the terminal adapter connects a plurality of personal computers, and the
In order to use the channel efficiently and perform communication by one connection of PPP or MP, it is only necessary to add a router unit to the main unit, and the wiring can be shared with the telephone.

[0009]

Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, a key telephone apparatus according to an embodiment of the present invention comprises a main apparatus 100, an extension telephone 101, and a terminal adapter 102, and a personal computer 103 is connected to the terminal adapter 102.

The main unit 100 includes a line interface 1 for controlling call connection with a communication network, a time switch 2 for switching communication paths, a main unit extension interface 3 for controlling the extension digital bus 104, and an extension telephone. 10
1, a display control unit 4 for controlling the display unit, an external line use status monitoring unit 6 for monitoring the use status of the ISDN line, a main main control unit 5 for controlling each unit of the main device 100, each interface, and the like. An external PPP / MP processing unit 7 for performing PPP and MP processing during communication, and an internal PPP / MP processing unit 8 for performing PPP and MP communication with the terminal adapter 102
And a router function unit 9 that performs router processing of address conversion, routing, and filtering, and a router main control unit 10 that controls each processing unit of the router unit.
Here, the external line PPP / MP processing unit 7 and the internal line PPP / MP
The processing unit 8, the router function unit 9, and the router main control unit 10 constitute a router unit 20.

The extension telephone set 101 has a terminal extension interface 11 for controlling an extension digital bus 104 on the extension terminal side, a codec 12 for performing code and decoding of voice signals, and a lamp display section 14 for displaying a lamp of the telephone set 101. , Terminal extension interface 11 and codec 12
And a telephone main control unit 13 for controlling the lamp display unit 14,
It is composed of a handset 15.

The terminal adapter 102 connects the terminal extension interface 11 for controlling the extension digital bus 104 on the extension terminal side, the PPP / MP processing unit 17 for performing asynchronous / synchronous PPP conversion and MP processing, and the personal computer 103. Interface 18, terminal extension interface 16, PPP / MP processing unit 17, and TA main control unit 1 for controlling serial interface 18.
9.

Table 1 shows an information management table of the outside line use status monitoring unit 6.

"ISDN line B channel logical number" is a logical number assigned to the B channel of the external line ISDN. “Use / unused” manages whether the extension terminal or the router unit 20 is currently using or not using the corresponding B channel. “Use terminal” manages which extension terminal or the router unit 20 is using. “Router section PPP / MP communication” manages whether the communication mode is PPP communication or MP communication when the router section 20 uses an outside line.

[0016]

[Table 1] FIG. 2 is a flowchart showing a flow of the channel reduction operation of the router unit 20 of the embodiment of FIG.

When there is a call operation from the extension telephone 101,
The main main control unit 5 detects a call request from the extension telephone 101 (step 201). The main main control unit 5 checks whether there is an empty B channel on the external line by the external line use status monitoring unit 6 (step 202). If there is a free B channel, the main main control unit 5 instructs the transmission to the line interface 1 (step 203), and also instructs the extension telephone 101 which has requested the main unit extension interface 3 to make a transmission. (Step 204). further,
The main main controller 5 instructs the time switch 2 to connect the communication line between the outside line and the inside line. If there is no free B channel, the main main control unit 5 checks whether the router unit 20 is performing MP communication with the external line use status monitoring unit 6 (step 20).
5). If the MP communication is not being performed, the main main control unit 5 instructs the main unit extension interface 3 to notify the extension telephone 101 that has issued the transmission request that the transmission cannot be performed (step 2).
06), the extension telephone set 101 is in a call-disabled state. If the external line use status monitoring unit 6 confirms that the router unit 20 is performing MP communication, the main main control unit 5 informs the router main control unit 10 of 1B of 2B channels used for MP communication. Request to release the channel (step 207). The router main controller 10 instructs the external line PPP / MP processor 7 to switch from MP communication (2B channel communication) to PPP communication (1B channel communication) (step 208). The external line PPP / MP processing unit 7 switches from the MP communication to the PPP communication, and notifies the router main control unit 10 that the processing has been completed (step 209). The router main control unit 10 notifies the main main control unit 5 of switching from MP communication to PPP communication (step 210). The main main controller 5 instructs the line interface 1 to release the unused B channel in the router main controller 10 (steps 211 and 212). Further, the main main control unit 5 instructs the external line use status monitoring unit 6 to change the used / unused information of the released B channel to “unused” (step 213). The main main controller 5 instructs the line interface 1 to transmit the vacant B channel in accordance with the transmission request from the extension telephone 101 (step 214). The main main control unit 5 is an extension telephone 101
Is instructed to the main unit extension interface 3 (step 215). Further, the main main control unit 5
Instructs the time switch 2 to connect the telephone line between the outside line and the inside line, and instructs the outside line use status monitoring unit 6 to change the use / unused information to "use" by the extension telephone 101 which has issued the transmission request ( Step 21) 6.

FIG. 3 is a flowchart showing a flow of the channel increasing operation of the router unit 20 of the embodiment of FIG.

When the external line communication is terminated by an extension terminal (extension telephone set 101, terminal adapter 102) other than the router section 20, the main main control section 5 sets the B used by the extension terminal.
The line interface 1 is instructed to release the channel (step 301), and the time switch 2 is instructed to cut off the communication path between the outside line and the inside line (step 302). Also,
The main main control unit 5 instructs the external line use status monitoring unit 6 to change the used / unused information of the released external line B channel to “unused” (step 303). Further, the main main control unit 5 notifies the router main control unit 10 that there is an external line free B channel (step 304). If the router main control unit 10 is currently in 1B channel communication (PPP communication), the router main control unit 10 sends a call request to the main main control unit 5 (steps 305 and 306). The main main control unit 5 instructs the line interface 1 to transmit a call (step 307), and instructs the time switch 2 to use the external line PPP / M of the router unit 20.
An instruction is given to connect the P processing unit 7 side to the external communication path (step 308). Further, the main main control unit 5 transmits to the external line use status monitoring unit 6
The used / unused information of the channel is set to “used”, and the router unit 20 is instructed to rewrite the information indicating the MP communication (step 309). The main main control unit 5 thereafter notifies the router main control unit 10 that the transmission request has been received (step 310). The router main control unit 10 has an external line PPP / MP.
By instructing the processing unit 7 to switch from the PPP communication to the MP communication, the MP communication is performed in the router unit 20 (step 311).

FIG. 4 is a flowchart showing the flow of display control performed by the display control unit 4 of the embodiment of FIG.

The display control unit 4 obtains information of the external line use status monitoring unit 6 through the main main control unit 5 and
Lamp display control. First, if the outside line vacant B channel is 1B channel or more, an instruction is given to display the lamp of the extension telephone 101 corresponding to the busy B channel of the outside line to "in use" (steps 401 and 402). If there is no outside line free B channel, the main main control unit 5 checks whether or not the router unit 20 is performing MP communication from the information of the outside line use status monitoring unit 6 (step 403). Router 2
If 0 is in the MP communication, the router unit 20 displays the 1B channel of the 2B channel used in the MP communication as empty, and sets the telephone set 10 corresponding to the other B channels.
An instruction is given to make the lamp No. 1 display "in use" (step 404). If the router unit 20 is not performing the MP communication, it instructs all the lamp displays of the extension telephone set 101 to be in use (step 405).

The processing of the main main controller 5 shown in FIGS. 2 and 3 and the processing of the display controller 4 shown in FIG.
(Floppy disk), CD-ROM, MO (magneto-optical disk) and other recording media may be recorded as a main device control program and read and executed by the CPU.

[0023]

As described above, the present invention has the following effects.

1) According to the first aspect of the present invention, a user using a terminal adapter connects a plurality of personal computers, and
In order to use the B channel of the N line efficiently and perform communication by one connection of PPP or MP, it is only necessary to add a router unit to the main unit, and the wiring can be shared with the telephone.

2) According to the second and third aspects of the present invention, an outside line can be used efficiently.

3) The invention according to claim 4 is the 1B channel,
The user can immediately know that the telephone can be used.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a key telephone device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a flow of a channel reduction operation of the router unit 20 of the embodiment of FIG.

FIG. 3 is a diagram showing a flow of a channel increasing operation of the router unit 20 of the embodiment of FIG.

FIG. 4 is a flowchart illustrating a flow of a display control operation performed by a display control unit 4 of the embodiment of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 100 Main apparatus 101 Extension telephone 102 Terminal adapter 103 Personal computer 104 Extension digital bus 20 Router section 1 Line interface 2 Time switch 3 Main apparatus extension interface 4 Display control section 5 Main main control section 6 External line use status monitoring section 7 External line PPP / MP processing Unit 8 extension PPP / MP processing unit 9 router function unit 10 router main control unit 11 terminal extension interface 12 codec 13 telephone main control unit 14 lamp control unit 15 handset 16 terminal extension interface 17 PPP / MP processing unit 18 serial interface 19 TA main Control units 201-217, 301-311, 401-405
Steps

Continued on the front page (72) Inventor Seiji Matsunami 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation F-term (reference) 5K049 BB02 BB05 BB19 CC07 CC09 FF01 FF43 KK02 KK11 5K051 BB02 CC04 DD03 DD13 FF02 FF11 5K101 KK20 LL03 MM03 MM06 PP06 QQ04 QQ13 TT01

Claims (11)

[Claims] 1. A key telephone device in which an ISDN line is connected to a main unit as a communication line and a plurality of extension terminals can be accommodated in an extension digital bus. A personal computer is connected to the main unit by a serial interface. A terminal adapter having a speed conversion function to be connected, an asynchronous / synchronous PPP conversion function, and a router unit having an address conversion function, a routing function, and a filtering function in the main device, which are provided in the main device, The terminal adapter and the router unit are connected by PPP or MP, and the router unit is connected by PPP or MP to an external line facing device, so that the terminal adapter can simultaneously perform data communication by one PPP / MP connection of the external line. Button phone device that can be. 2. The method according to claim 1, wherein the router is an ISD based on MP communication.
When receiving a transmission request from an extension telephone during N-line 2B communication, the main unit has a means for releasing 1B channel of 2B channels in MP communication, and the main unit requests transmission of the released 1B channel. 2. The key telephone apparatus according to claim 1, further comprising means for performing control for assigning to an extension telephone. 3. The apparatus according to claim 2, further comprising means for using the 1B channel released by said router unit, reallocating the 1B channel released by the extension telephone which has ended the call to said router unit, and performing control to return to MP communication. Button telephone equipment. 4. The router unit performs ISDN by MP communication.
3. The key telephone apparatus according to claim 2, further comprising means for controlling the extension display of a lamp of the extension telephone indicating the use state of the external line in the main unit so that the 1B channel can be used by the extension telephone even when the line 2B channel is used. . 5. A line interface for controlling call connection with a communication network, a main unit extension interface for controlling the extension digital bus, and a display control unit for controlling a display unit of an extension telephone. A time switch for switching communication paths, an external line usage monitoring unit for monitoring the use status of the ISDN line, an external line PPP / MP processing unit for performing PPP and MP processing during external line communication, a PPP for the terminal adapter, An extension PPP / MP processing unit for performing MP communication, a router function unit for performing router processing,
A router unit including an MP processing unit, the extension PPP / MP processing unit, and a router main control unit that controls the router function unit;
A main main control section for controlling each section in the main apparatus, wherein the terminal adapter includes: a terminal extension interface for controlling the extension digital bus;
A PPP / MP processing unit for performing PP conversion and MP processing;
The apparatus according to claim 1, further comprising a serial interface with a personal computer, a terminal extension interface, the PPP / MP processing unit, and a TA main control unit that controls the serial interface. 6. The main main control unit detects a transmission request from an extension telephone when there is a transmission operation from an extension telephone, and checks whether or not there is a free B channel on the external line by the external line use status monitoring unit. If there is a free B channel, it instructs the line interface to make a call, and instructs the main unit interface to make a call to the extension telephone that requested the call. If there is no free B channel,
The external line usage status monitoring unit checks whether the router unit is performing MP communication, and if not performing MP communication, instructs the main unit extension interface to notify the extension telephone that issued the transmission request that transmission is impossible. When the MP communication is being performed, the router main control unit is requested to release one of the 2B channels used for the MP communication, and the router main control unit switches from the MP communication to the PPP communication. When the notification is received, the line interface is instructed to release the unused B channel in the router main control unit, and the used / unused information of the released B channel is notified to the external line use status monitoring unit as “unused”. Instructing the line interface to transmit a vacant B channel in response to a call request from the extension telephone. The main unit extension interface is instructed to be in a transmission state, the time switch is instructed to connect an external line and an extension communication path, and a transmission request for an unused B channel is given to the external line use status monitoring unit. The router main control unit instructs the external line PPP / MP processing unit to perform MP communication in response to a 1B channel release request from the main main control unit. 6. The key telephone apparatus according to claim 5, wherein an instruction is issued to switch to PPP communication from the communication apparatus, and when the switching is completed, the main main control unit is notified that the communication has been switched from MP communication to PPP communication. 7. When the external line communication is completed at an extension terminal other than the router unit, the main main control unit instructs the line interface to release the B channel used by the extension terminal, and instructs the time switch to Instructs to cut off the communication path between the outside line and the inside line, instructs the outside line use status monitoring unit to change the used / unused information of the released outside line B channel to “unused”, and instructs the router main control unit. It notifies that there is an external line free B channel, and if PPP communication is in progress, receives a transmission request from the router main control unit, instructs the line interface to transmit, and instructs the time switch to use the external line PPP / The MP processing unit is instructed to connect the outside line communication path, and the outside line use status monitoring unit is notified of the B channel use / unused information transmitted by the line interface. The router unit instructs the router unit to rewrite the information that the communication is the MP communication, notifies the router main control unit that the transmission request has been received, and the router main control unit transmits the transmission request to the main main control unit. 7. The key telephone apparatus according to claim 5, further comprising, upon receiving a notification from the main main control unit that a transmission request has been received, instructing the external line PPP / MP processing unit to switch from PPP communication to MP communication. 8. The display control unit obtains information of the external line use status monitoring unit through the main main control unit, and if the available external B channel is 1B channel or more, the extension corresponding to the busy B channel of the external line. Phone light "in use"
When there is no outside line free B channel, it is confirmed whether or not the router unit is performing MP communication.
Instructing the router unit to display 1B channel of the 2B channels used in the MP communication as empty, and to display the lamp of the extension telephone corresponding to the other B channel as "in use", 8. The key telephone apparatus according to claim 6, wherein when the telephone is not performing MP communication, the main control unit of the extension telephone is instructed to change all lamp displays of the telephone to "in use". 9. A recording medium recording a process performed by a main main control unit of the key telephone apparatus according to claim 5, wherein a call request from the extension telephone is detected when a call operation is performed from the extension telephone. A procedure for checking whether or not there is a free B channel in the outside line by the outside line use status monitoring unit, a procedure for instructing the outside line to transmit to the line interface when there is a free B channel, and a procedure for transmitting to the main device interface. A procedure for instructing the requested extension telephone to be in a calling state, a procedure for confirming whether or not the router section is performing MP communication in the external line use status monitoring section when there is no free B channel, A procedure for instructing the main unit extension interface to notify the extension telephone that issued the call request that the call cannot be made; and 2B using the MP communication to the control unit
When the router main control unit receives a notification requesting that the 1B channel among the channels be released and a notification from the router main control unit that the communication has been switched from the MP communication to the PPP communication, the line interface becomes unused in the router main control unit. A procedure for instructing to release the B channel, a procedure for instructing the external line usage monitoring unit to change the used / unused information of the released B channel to “unused”, and A procedure for instructing the line interface to make an outgoing call in response to a call request from the telephone, a procedure for instructing the main unit extension interface so that the extension telephone is in a calling state, and A procedure for instructing the external telephone to be connected, and using an unused B channel to the external line use status monitoring unit with the extension telephone that has issued the transmission request. Recording medium recording the main control program for the executing used / the procedure for instructing the rewriting unused information into the computer as. 10. A recording medium on which a process performed by a main main control unit of the key telephone apparatus according to claim 5 is recorded, wherein when an outside line communication is terminated at an extension terminal other than the router unit,
A procedure for instructing the line interface to release the B channel used by the extension terminal, a procedure for instructing the time switch to cut off the communication path between the external line and the internal line, and a step of releasing to the external line use status monitoring unit A procedure for instructing to change the use / unused information of the external line B channel to “unused”; a procedure for notifying the router main control unit that there is an external line free B channel;
A procedure for receiving a transmission request from the router main control unit and instructing the line interface to transmit the call, and a procedure for instructing the time switch to connect the external line PPP / MP processing unit and the external communication path. A step of instructing the external line use status monitoring unit to use the unused / unused information of the B channel transmitted by the line interface, and instructing the router unit to rewrite the information indicating the MP communication; A recording medium in which a main device control program for causing a computer to execute a procedure of notifying a control unit that a transmission request has been received is recorded. 11. A recording medium in which a process of a display control unit of a key telephone apparatus according to claim 5 is recorded, wherein a procedure for obtaining information of said external line use status monitoring unit through said main main control unit; If the channel is 1B channel or more, the procedure for displaying the lamp of the extension telephone corresponding to the busy B channel of the external line to "in use". Check if the router is in MP communication,
A procedure in which 1B channel of 2B channels used in P communication is displayed as empty, and a lamp of an extension telephone corresponding to the other B channel is displayed as "in use"; A recording medium on which a display control program for causing a computer to execute a procedure for instructing a main control unit of an extension telephone to change all lamp displays of a telephone to "in use" when communication is not being performed.