JP3332395B2 - Communication control method, communication control device, and communication control system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication control method, and more particularly, to a data communication control method for displaying a dial signal.

[0002]

2. Description of the Related Art Conventionally, in a data communication control method, a flexible "data communication start key" or "data communication disconnection key" provided on a digital telephone is operated.
The connection control of the data communication path was performed.

A data terminal having an automatic calling procedure can control connection of a data communication path, but cannot control connection of a digital telephone by a dial signal from the data terminal.

[0004]

As described above, in the conventional data communication control method, the connection control between the data terminal and the digital telephone is performed independently. Search for the other party based on,
When using the automatic dialing function), a large display is required for the digital telephone, and a large keyboard is required to match the data input means to the user's preference. There were problems such as becoming.

Accordingly, the present invention provides a data communication control in which control data registered in a data terminal is sent to a microcomputer of a main unit, and a dial signal is easily displayed on a digital telephone by arithmetic control of the microcomputer. Provide a way.

[0006]

SUMMARY OF THE INVENTION The present invention relates to an exchange having a microprocessor for performing exchange control, a telephone connected to the exchange, and a data terminal connected to the telephone via a data interface unit. Transmitting a dial signal from the data terminal to the microprocessor of the switching device via the data interface unit, and storing a correspondence between the data terminal and the telephone. Searching for the telephone corresponding to the dial signal from the data terminal based on the correspondence table;
Displaying the dial number corresponding to the dial signal from the data terminal on the display device of the searched telephone.

[0007]

The dial signal from the data terminal is transmitted to the microcomputer of the main unit via the data interface unit, and the control data is processed by the microcomputer to display the dial signal of the digital telephone in use.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a data communication control method according to an embodiment of the present invention.

FIG. 1 is a block diagram showing an outline of a control method of the data communication control device 10 of the present invention.

A main unit 11 of the data communication control method includes a control unit 12 for performing call processing and call path exchange, a data highway 13 for transmitting control data, a PCM highway 14 for a time-division call path, and an office line. , 15n, digital telephone interface units 16a,..., 16n, a standard telephone interface unit 17, another digital telephone interface unit 18, and the like.

The control unit 12 incorporates a microcomputer 19 such as a CPU and a time switch circuit 20, and control data from the microcomputer 19 is transmitted via the data highway 13 to each of the interface units 15a,..., 16a,. , 17, 18 and the like, and the time division control data of the time switch circuit 20 are sent to each interface unit via the PCM highway 14.

Each of the line interface units 15a,..., 15n of the main unit 11 is provided with a public telephone network for connecting the line lines 21a,.
, 22n and the data interface unit 23
a,..., 23n
, 24n are connected, a modem 25 is connected to the standard telephone interface unit 17, and a data interface unit 26 is connected to the digital telephone interface unit 18.

The data interface unit 23
, 23n are connected to data terminals 28a,..., 28n each having a personal computer or the like via interfaces 27a,..., 27n such as RS-232D interfaces, and connected to the modem 25 and the data interface unit 26. Also, an interface 29 such as an RS-232D interface is connected.

In the data communication control method configured as described above, for example, when an extension connection between the digital telephone 24a and the digital telephone 24n is made, the data terminal 28
A keyboard (not shown) or the like is operated to generate a "call + dial signal", and the data interface unit 23a, the digital telephone interface unit 16a, the data highway 13, and the PC of the digital telephone 24a are generated.
The M highway 14, the digital telephone interface unit 16n, and the data interface unit 23n of the digital telephone 24n are connected to make an extension call. The other telephone lines 21a and the like are connected in substantially the same manner, and the digital telephone 24a and the other telephone lines 21a and the like are connected.

FIG. 2 shows the telephones 22a,.
2n and data interface units 23a,.
n is a block diagram showing the telephone set 22a and the data interface unit 23a in detail.

The telephone 22a and the data interface unit 23a include a ping-pong transmission circuit 30, a telephone control microcomputer 31, a data communication control microcomputer 32, selectors 33, 34, 35,
The serial / parallel conversion circuits 36 and 37 and the parallel / parallel
Serial conversion circuits 38 and 39, a driver / receiver 40 for an RS-232 interface, and the like are provided.

As shown in FIG. 3, the ping-pong transmission circuit 30 has two B-channels (B
1, B2 channel) and a D channel having a speed of 16 kbps and a time division channel of 2B + D format is used. The data terminal 28a, the telephone 22a and the digital telephone interface unit 1 of the main unit 11 are used.
Ping-pong transmission of the digital signal is performed between the ping-pong transmission device 6a.

The ping-pong transmission circuit 30 receives the upstream data of each channel and synthesizes the data into a data bucket of 2B + D format.
A 2B + D creating unit 41 for transmitting a digital signal to the 6a;
Digital telephone interface units 16a to 2B
And a 2B + D separation unit 42 that receives a downstream data bucket of the + D format and separates data for each channel.

Here, the B1 channel is allocated to transmission of voice data transmitted and received by the telephone circuit 22a during a telephone call of the digital telephone 24a, and the B2 channel is transmitted to transmission of communication data transmitted and received by the data terminal 28a during data communication. And the D channel data is
It is assigned to transmission of control data transmitted and received by the telephone control microcomputer 31 and the data communication control microcomputer 32.

That is, the voice data is sent from the telephone set 22a and sent to the 2B + D creating unit 41 as B1 channel uplink data B1-IN. The communication data is sent from the data terminal 28a during data communication, and
The data is sent to the 2B + D creation unit 41 as B2 channel uplink data B2-IN via a receiver 40, a selector 35, a serial / parallel conversion circuit 37, a parallel / serial conversion circuit 39, and the like. The data is transmitted from the data communication control microcomputer 31 or the microcomputer 32 for data communication, transmitted through the selector 33 as the D-channel uplink data D-IN, to the 2B + D generating unit 41, is formed into a packet by the 2B + D generating unit 41, and is transmitted through the transformer 44 and the like. To the digital telephone interface unit 16a.

The digital telephone interface unit 16a is connected to the 2B through a transformer 44, a rectifier 43 and the like.
The packet of 2B + D sent to the + D creating unit 42 is B1
Channel down data B1-OUT, B2 channel down data B2-OUT and D channel down data D
-OUT, and the data B1 -OUT is stored in the telephone 22
a, the data B2-OUT is sent to the data terminal 28a via the serial / parallel conversion circuit 36, the parallel / serial conversion circuit 38, the selector 34, the driver / receiver 40, etc., and the data D-OUT is used for telephone control. It is sent to the microcomputer 31 and the microcomputer 32 for data communication control.

The B2 channel upstream data B2-IN and the B2 channel downstream data B2-OUT are 8-bit serial data (64 kbps), respectively.
Six bits are allocated to the communication data RD (48 kbps), and the remaining two bits are allocated to the reception carrier detection signal CD (8 kbps) and the transmission enable signal CS (8 kbps) of the RS-232D interface.

The remaining two bits of the uplink data 2B-IN are the transmission request signal R of the RS-232D interface.
S (8 kbps) and transmittable signal SD (8 kbps)
It is applied to.

As shown in FIG. 2, the downlink data B2-OUT is first input to a serial / parallel conversion circuit 36, where it is separated into communication data RD, a received carrier detection signal CD, and a transmission enable signal CS. The communication data RD is input to the parallel / serial converter 38, converted into serial data of 48 kbps, and sent to the selector 34.

The received carrier detection signal CD and the transmission enable signal CS are sent to the driver / receiver 40 and the like via the inverter 45 and the like.

The upstream communication data R from the data terminal 28a
D is input to a serial / parallel converter 37 via a driver / receiver 40 and a selector 35 and is converted into parallel data.
9, a transmission request signal RS and a transmission enable signal CS
And 8 bits of upstream data 2B-IN are created and sent to the ping-pong transmission circuit 30.

Here, the telephone control microcomputer 3
1 controls the telephone 22a based on the D-channel downlink data D-OUT from the ping-pong transmission circuit 30 (for example,
Performs a bell sound, turns on / off various displays, and sends control data to the selector 33 in accordance with a signal (for example, a hook signal, a selection signal, etc.) of the telephone set 22a.

The selector 33 selects one of the control data of the microcomputer 31 for telephone control and the microcomputer 32 for data communication control.
This control data is sent to the ping-pong transmission circuit 30 as D-channel uplink data D-IN.

In the selection of the control data, the telephone control microcomputer 31 controls the selector 33 to select its own transmission control data, and prohibits the data communication control microcomputer 32 from transmitting the control data. Therefore, the data communication control microcomputer 32 operates the ping-pong transmission circuit 3 only while the telephone control microcomputer 31 does not transmit control data.
The control data is transmitted to 0, and the control data of the D channel is transmitted to the digital telephone interface unit 16a of the main device 11.

FIG. 4 is a block diagram showing the internal configuration of the data communication control microcomputer 32 of FIG. That is, the data communication control microcomputer 32 includes a D-channel transmitting unit 50 for transmitting the D-channel upstream data D-IN to the ping-pong transmission circuit 30, a D-channel receiving unit 51 for receiving the D-channel downstream data D-OUT. Is provided. The output signal of the D-channel receiving unit 51 is sent to a tri-state buffer 52 and an address analyzing unit 53. The control data for the data interface unit 23a whose address has been analyzed by the address analysis unit 53 is sent to the tristated buffer 52, and the tristated buffer 5 is sent to the tristated buffer 52.
2 control signal. Tri-suite Bacher 52
Is sent to the data analyzer 54, where the data is analyzed.

The data analysis output signal is supplied to the inverter 5
5, is sent to the called display control unit 56, the data set ready control unit 57, and the data control unit 58.

The inverter 55 reversely converts the data analysis output signal, and converts the inversely converted data analysis output signal to a tri-state buffer 59 provided on the output side of the data control unit 58 and transmission data SD from the driver / receiver 40.
Is transmitted to the tri-state buffer 60 and the control signal of the tri-state buffer 59 and the tri-state buffer 60.

When the called display control unit 56 receives the data analysis output signal, a called display signal CI is generated, and when the data set ready control unit 57 receives the data analysis output signal, the data set ready signal CI is generated. Signals RD are generated and sent to data terminal 28a via driver / receiver 40 to control data terminal 28a.

Transmission data SD sent from the data terminal 28a via the driver / receiver 40 is sent to the data monitoring unit 61 via the tri-stated buffer 60,
The restoration request signal ER is sent to the restoration request monitoring unit 62.
When the transmission data SD is monitored, the data monitoring signal is sent to the data creation unit 63, and when the recovery request signal ER is monitored, the recovery request signal ER is sent to the data creation unit 63, and the data monitoring signal and the recovery The request signal is synthesized and sent to the tristated buffer 64.

The tri-state buffer 64 is controlled by a control signal of the telephone control microcomputer 31 and sent to the D-channel transmitting section 50, where the selector 3
3 and transmitted to the ping-pong transmission circuit 30 as D-channel uplink data D-IN. In this manner, the downlink data D-OUT of the D channel transmitted from the ping-pong transmission circuit 30 is received and analyzed, and the called display signal CI, the data set ready signal RD, the communication data R
D, sent to the data terminal 28a via the driver / receiver 40, and data is created by the transmission data SD and the recovery request signal from the data terminal 28a.
The data is sent to the ping-pong transmission circuit 30 as uplink data D-IN of the D channel.

FIG. 5 shows the configuration of the digital telephone interface unit 16a of the main unit 11. The digital telephone interface unit 18 for connecting the data interface unit 26 has the same configuration.

This digital telephone interface unit 16a is provided with a plurality of ping-pong transmission circuits 80, and is connected to each data eater interface unit 23a via a transmission data transformer 81 to perform ping-pong transmission of digital signals.

The ping-pong transmission circuit 80 has the same configuration as the ping-pong transmission circuit 30 in the data eater interface unit 23a shown in FIG. 3, except that the ping-pong transmission circuit 30 operates in the slave mode, There is a difference that the circuit 80 operates in the master mode. That is, the ping-pong transmission circuit 80 has the initiative of the bucket transmission of the ping-pong transmission in the master mode.

The time slot assigner 82 receives the frame synchronization signal and the clock signal from the PCM highway 14 and converts the uplink and downlink data of the B channel to the PCM.
This is to notify each ping-pong transmission circuit 80 of the timing of transmission / reception to / from the highway 14.

Each ping-pong transmission circuit 80 directly accesses the PCM highway 14 at a time designated by the time slot assigner 82 to transmit and receive upward and downward data at a speed of 2.048 Mbps.

Microcomputer 8 for control data communication
3 monitors D channel data (control data) transmitted and received by each ping-pong transmission circuit 80 and communicates the control data with the control unit 12 via the data highway 13.

FIG. 6 shows the data interface unit 26 of FIG. This data interface unit 2
6 is a ping-pong transmission circuit 90, a microcomputer 91 for data communication control, selectors 92 and 93, serial / parallel conversion circuits 94 and 95, parallel / serial conversion circuits 96 and 97, and an RS-232 interface. A driver / receiver 98 and the like are provided.
This is similar to the data interface unit 23a connected to the data terminal 28a described in. However, there is a difference that the data interface unit 23a is set to the modem mode for the data terminal 28a, whereas the data interface unit 26 is set to the terminal mode for the modem 25. That is, RS-232D
The direction of the signal line of the interface 29 is reversed.

Further, since the data interface unit 26 is not built in the digital telephone 24a, the B1 channel for voice data transmission is unnecessary, and the uplink control data for telephone control and data communication control is selected. There is no selector to do this.

FIG. 7 shows the standard telephone interface unit 17 to which the modem 25 is connected. The standard telephone interface unit 17 includes a call signal transmitting circuit 1
Reference numeral 00 denotes a circuit for transmitting a calling signal (16 Hz AC signal) supplied from the calling signal generation source 101 to the modem 25. The standard telephone interface unit 17 is provided with a DC power supply circuit 102 for applying a specified DC voltage to the modem 25, inverting its polarity, and detecting the opening and closing of the DC loop.
Further, the standard telephone interface unit 17 is provided with a dial detecting section 103 to detect a dial pulse.

This standard telephone interface unit 1
7 is provided with a codec section 105 via a transformer 104, A / D conversion and D / A conversion of the audio signal are performed, and the audio signal is converted to a P at a time designated by the time slot assigner 106.
Transmission and reception of audio data with the CM highway 14 are performed.

This standard telephone interface unit 1
The control data communication microcomputer 107 provided in the control unit 7 transmits a call signal to the call signal transmission circuit 100, the DC power supply circuit 102, the dial detection unit 103, etc., stops the call signal, monitors the opening and closing of the DC loop, controls the polarity inversion, and controls the dial. It monitors the pulse detection result and exchanges control data with the control unit 12 through the data highway 13.

FIG. 8 shows a case where the main unit 11 is connected to the public line 2 of the public telephone network.
Office line interface unit 15 for connecting to 1a
a.

The office line interface unit 15a includes an interface circuit 110 and a codec unit 111.
, A time slot assigner 112, a control data communication microcomputer 113, and the like.

The interface circuit 110 has a central office 21
A station call signal detection circuit 114, a polarity reversal detection circuit 115, and a DC loop circuit 116 are provided to detect a call signal from the station line 21a, detect polarity reversal of the station line 21a, and close a DC loop. Opening, sending dial pulses to the office line 21a, etc.

The codec section 111 converts the audio signal into an A / D signal.
Conversion and D / A conversion, the DC loop circuit 11
6 forms a DC loop in the local line 21a, so that an AC coupling is performed on the local line 21a.

The calling signal detecting circuit 114, the polarity reversing detecting circuit 115, the DC loop circuit 116 and the codec unit 111 are connected to the local line interface units 15a,
.., Several sets are mounted every 15n.

The time slot assigner 112 generates a codec section 11 based on a predetermined time slot address for the codec section 111 and a frame synchronization signal and a clock signal from the PCM highway 14.
1 determines the timing of transmitting and receiving audio data to and from the PCM highway 14 and notifies the codec unit 111 of the timing.

The codec unit 111 transmits and receives audio data to and from the PCM highway 14 at a time designated by the time slot assigner 112.

Microcomputer 1 for control data communication
Reference numeral 13 denotes a monitor of detection signals of the call signal detection circuit 114 and the polarity inversion detection circuit 115, control of the DC loop circuit 116, detection of a call signal with the control unit 12 through the control data highway 13, detection of polarity inversion, and detection of the DC loop. Transmission and reception of control data regarding opening / closing, transmission of dial pulses, and the like are performed.

FIG. 9 shows the office line interface unit 15a and the digital telephone interface unit 16.
a, a microcomputer 19 in the control unit 12 for controlling the standard telephone interface unit 17 and the like, which performs overall call processing and exchange control in data communication control;

The microcomputer 19 is provided with a data receiving section 120 connected to the data highway 13, and receives control data from each section of the system. The control data is decoded by the data receiving unit 120. For example, if the decoded signal is an incoming signal from the station line 21a, the modem selecting unit 121 is activated and the information in the modem visit table 122 is read.

The modem visit table 122 has the modem 25
Is written in advance, that is, information indicating a free or busy state. Modem selector 121
Selects one vacant modem 25 while referring to the information of the modem visit table 122, and transmits a control signal for selecting the modem 25 to the command transmitting unit 123. The command sending unit 123 outputs the selected modem 2
5 to call incoming data to call data highway 13
To the standard telephone interface unit 17.

If the result of decoding by the data receiving section 120 is a response from the modem 25 to incoming data, this response signal is notified to the command sending section 123 and the time switch control section 124. Then, the command sending unit 123
Instructs the line interface unit 15a to close the incoming loop (supplement of the line), and the time switch control unit 124 controls the time switch circuit 20 so that the line interface unit 15a and the standard telephone The interface unit 17 is connected. As a result, a communication path between the modem 25 and the calling data device is established.

The modem busy table 122 is rewritten to be busy because the modem 25 is busy from an empty state.

The decoding result in data receiving section 120 is
If the extension number has been designated to the modem 25 through the communication path from the calling side, the data interface unit selection unit 125 is activated, and the information in the data interface unit busy table 126 is read.
In the data interface unit busy table 126, the state (empty or busy) of each data interface unit 23a,..., 23n of each digital telephone 24a,.

Data interface unit selector 12
5 are data interface units 23a,.
From n, a specific data interface unit, for example, the data interface unit 23a, is read from the data interface unit busy table 126, and if it indicates free, the extension number of the data interface unit 23a is notified to the command sending unit 127. You. Then, the command sending unit 127 sends the data terminal 2 to the data interface unit 23a.
Incoming data is sent to call 8a. By this operation, the data interface unit busy table 126 is rewritten from an empty state to a busy state.

The result of decoding by the data receiving unit 120 is the data interface unit 23a for the incoming data.
If the response is a response of the command sending unit 1
28 and the time switch sending unit 129 are notified.

Command sending section 128 sends a modem connection command indicating connection between data terminal 28a and modem 25 to data interface unit 23a and data interface unit 26, and time switch control section 129 controls time switch circuit 20. Control is performed to connect the data interface unit 23a and the data interface unit 18.

As a result, a communication path between the data terminal 28a and the data interface unit 18 is established. As a result, data communication between the data terminal 28a and the calling data equipment via the public telephone network with the office line 21a or the like is established. Be started.

The result of decoding by the data receiving unit 120 is the data interface unit 23a after the start of data communication.
In this case, the command sending unit 130 and the time switch control unit 131 are notified of this state.

The command sending unit 130 instructs the office line interface unit 15a to release the linear loop of the office line 21a, and
Disconnect data indicating disconnection of the communication path is sent to 3a.
The time switch control unit 131 includes the time switch circuit 2
0 to cut off both communication paths between the modem 25 and the line interface unit 15a and between the modem 25 and the data interface unit 23a.

Thus, the data communication ends. Also,
Status of modem 25 in modem busy table 122 and data interface unit busy table 126
Is rewritten from busy to empty.

FIG. 10 shows the connection between the digital telephone 24a and the data interface unit 23a by the microcomputer 19 using the "call + dial signal" from the data terminal 28a by the microcomputer 19 and the display of the dial signal. 9 shows another example of control to be performed.

The microcomputer 19 is provided with the data receiving section 120, and transmits a "call + dial signal" from the data terminal 28a to the data interface unit 23a integrally connected to the digital telephone 24a and the control data highway of the main unit 11. 13. The data receiving section 120 is connected to a control data identifying section 140 for identifying control data, and its output signal is sent to the digital telephone connection control section 141 and the destination identifying section 142.

The digital telephone connection control section 141 is connected to the redial storage section 143 and the digital telephone liquid crystal display control section 144, and stores and displays dial signals.

Further, the data identification unit connection control section 145, the on-hook transmission / pseudo dial creation section 146, the digital telephone connection control section 141, and the like are connected to the destination identification section 142.
These signals are mutually controlled by the output signals of.

The "transmission + dial signal" is composed of 8 bits as shown in FIG. 11, and the most significant bit is assigned to the identification bit, and the remaining bits are assigned to the control data.

If the identification bit is "0", it is identified as control data from the digital telephone 24a.
If it is "1", it is identified as control data from the data interface unit 23a. The control data includes a dial, a "D" signal for calling the data terminal 28a,
Others include a carriage return signal, an on-hook dial signal, an off-hook dial signal, and the like.

When the data receiving section 120 receives the "call + dial signal", it is sent to the control data identifying section 140, and the dial signal of the digital telephone 24a, the on-hook dial signal or the off-hook dial signal of the digital telephone 24a, the D signal, the data Carriage from terminal 28a
Whether the signal is a return signal or a dial signal of the data interface unit 23a is identified.

If the control data identification section 140 is a dial signal without a D signal, this dial signal is sent to the digital telephone connection control section 141. At this time, the state of the data interface unit 23a is shifted to the data interface unit connection control unit 145, and the data interface unit 23a stands by in a call state so as not to receive a call.

When the digital telephone connection control unit 141 receives the dial signal, the digital telephone 24a is in the on-hook dial state (the dial is performed with the handset of the digital telephone 24a left, and the ringback sound can be heard from the speaker of the digital telephone 24a). If the other party answers, you can raise the handset and talk.

At this time, the digital telephone connection control unit 1
41 controls connection of a dial signal input via the data interface unit 23a as a dial signal of the digital telephone 24a, and performs proxy transmission by a dial signal of the data terminal 28a.

When the other party answers, the receiver of the digital telephone 24a is released, and the digital telephone 24a is set to an off-hook state. This off-hook signal is sent to the control data identification section 140 and the digital telephone connection control section 141 to put the digital telephone 24a into a talking state.

The off-hook signal is sent from the control data identification unit 140 to the data interface unit connection control unit 145, and the data interface unit 2
3a is transited to an empty state (end state).

When the data receiving unit 120 receives a carriage return signal from the data terminal 28a while calling the digital telephone 24a of the other party, the control data identifying unit 1
40, the digital telephone connection control section 141 and the data interface unit connection control section 145 receive the end signal via the destination identification section 142,
4a and the data interface unit 23a are vacant to end the call.

When the other party is busy talking, the redial key is operated from the digital telephone 24a or the "call + redial signal" is input from the data terminal 28a to be stored in the redial storage unit 143. The dial signal can be immediately transmitted and the redial key operation can be started.

In this embodiment, the case of the extension connection has been described, but the same can be applied to the case of the office connection.

Further, although the "transmission + dial signal" is transmitted from the data terminal 28a, the "transmission + dial signal" of the data terminal 28a is transmitted.
“Dialing signal” from the digital telephone 24a
It can be transmitted in addition to the "dial signal", or conversely, can be transmitted in addition to the "transmission + dial signal" of the data terminal 28a to the "transmission + dial signal" from the digital telephone 24a. .

These dial signals are sent to the digital telephone liquid crystal display control unit 144 via the digital telephone connection control unit 141, and displayed on the liquid crystal display unit of the digital telephone 24a. Used when performing

[0085]

As described above in detail, according to the present invention, when a dial signal from a data terminal is transmitted to a microprocessor via a data interface unit, a dial number corresponding to the transmitted dial signal is transmitted. Is displayed on the display device of the telephone, so that the dialed content can be immediately confirmed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an outline of a data communication control device.

FIG. 2 is a block diagram showing an outline of the digital telephone shown in FIG. 1;

FIG. 3 is a block diagram showing an outline of the ping-pong transmission circuit of FIG. 2;

FIG. 4 is a block diagram showing an outline of the data communication control microcomputer of FIG. 2;

FIG. 5 is a block diagram showing an outline of the data telephone control interface unit of FIG. 2;

FIG. 6 is a block diagram showing an outline of the data interface unit of FIG. 2;

FIG. 7 is a block diagram showing an outline of the standard telephone interface unit of FIG. 2;

FIG. 8 is a block diagram showing an outline of the station line interface unit of FIG. 2;

FIG. 9 is a block diagram showing an outline of a first control example of the microcomputer of FIG. 1;

FIG. 10 is a block diagram showing an outline of a second control example of the microcomputer of FIG. 1;

FIG. 11 is an explanatory diagram showing an example of use of control data.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Data communication control apparatus 11 Main apparatus 12 Control unit 13 Data highway 14 PCM highway 15a Office line interface unit 16a Digital telephone interface unit 17 Standard telephone interface unit 18 Digital telephone interface unit 19 Microcomputer 20 Time switch circuit 21a Office line 22a Telephone circuit 23a Data interface unit 24a Digital telephone 25 Modem 26 Data interface unit 28a Data terminal 30 Ping-pong transmission circuit 31 Telephone control microcomputer 32 Data communication control microcomputer 41 2B + D creation unit 42 2B + D separation unit 50 Channel transmission unit 51 Channel transmission unit 80 Ping-pong transmission circuit 82 Time slot asa G 83 Control data communication microcomputer 90 Ping-pong transmission circuit 91 Data communication control microcomputer 105 Codec section 106 Time slot assigner 107 Control data communication microcomputer 110 Interface circuit 111 Codec section 112 Time slot assigner 113 Control data communication Microcomputer 120 Data receiving unit 121 Modem selecting unit 125 Data interface unit selecting unit 140 Control data identifying unit 141 Digital telephone connection control unit 141 142 Destination identifying unit 143 Redial storage unit 144 Digital telephone liquid crystal display control unit 145 Data interface unit connection Control unit 146 Off-hook transmission + pseudo dial creation unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) H04M 11/00-11/10 H04M 3/42-3/58 H04M 1/26-1/57 H04Q 3 / 58-3/62

Claims (3)

(57) [Claims] 1. A communication control method according to a switching device having a microprocessor for performing switching control, a telephone connected to the switching device, and a data terminal connected to the telephone via a data interface unit. Transmitting a dial signal from the data terminal to a microprocessor of the switching device via the data interface unit; and storing the data based on a correspondence table storing a correspondence between the data terminal and the telephone. Retrieving the telephone corresponding to the dial signal from the terminal; and displaying a dial number corresponding to the dial signal from the data terminal on a display device of the retrieved telephone. Communication control method. 2. A communication control device having a microprocessor and performing exchange control of a telephone to which a data terminal is connected via a data interface unit, wherein a dial signal from the data terminal is received via the data interface unit. A data receiving unit, a correspondence table that stores a correspondence relationship between the data terminal and the telephone, a search unit that searches the telephone corresponding to a dial signal from the data terminal based on the correspondence table, And a display control unit for displaying a dial number corresponding to the dial signal from the data terminal on the display device of the searched telephone. 3. A communication control system comprising: a main unit for controlling exchange of a telephone; and a data interface unit for transmitting / receiving data of a data terminal associated with the telephone. A data receiving unit that receives a dial signal through the data interface unit; a correspondence table that stores a correspondence between the data terminal and the telephone; and a dial signal from the data terminal based on the correspondence table. A communication control device, comprising: a search unit that searches for the telephone to be used; and a display control unit that displays a dial number corresponding to a dial signal from the data terminal on a display device of the searched telephone.