JPH05110715A - Data communication control method - Google Patents

Abstract

PURPOSE:To enable substitute origination that an originating and dialing signal is used in place of dialing signal from a digital telephone set by sending the original and dialing signal from a data terminal equipment to a microcomputer via a data interface unit. CONSTITUTION:When a data reception section 120 receives the originating and dial signal, the signal is sent to a date identification section 140, and when the signal is a dialing signal without a D signal, the dialing signal is sent to a digital telephone set connection control section 141. In this case, the connection of a data interface unit is transited to a data interface unit connection control section 145 and the system awaits a call in a call state so as not to receive incoming call. The data interface unit connection control section 141 uses the dialing signal inputted via the data interface unit as a dial signal to the digital telephone set to implement connection control, thereby performing substitute origination on behalf of the digital telephone set by using the dialing signal of the data terminal equipment.

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 characterized by placing a digital telephone in a calling state by 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,
It was controlling the connection of the data communication path.

Further, although a data terminal having an automatic transmission procedure can control connection of a data communication path, it cannot control connection of a digital telephone by a transmission signal from the data terminal.

[0004]

As described above, in the conventional data communication control method, since the connection control between the data terminal and the digital telephone is independently performed, the telephone directory function (name and telephone number correspondence table is displayed). Search 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 method to the user's preference. There was a problem such as becoming.

Therefore, the present invention provides a data communication control method in which the control data registered in the data terminal is sent to the microcomputer of the main unit, and the microcomputer sets the digital telephone to the calling state.

[0006]

The present invention provides a data terminal,
In a data communication control method comprising a digital telephone, a data interface unit integrating this digital telephone and a main unit having a microcomputer, transmission information and a dial signal from a data terminal are sent to the microcomputer via the data interface unit. There is provided a data communication control method characterized in that a digital telephone is set to an outgoing state by this microcomputer control.

[0007]

The dial signal from the data terminal is sent to the microcomputer of the main unit through the data interface unit, and the microcomputer is controlled to put the digital telephone in the calling state.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the data communication control method of the present invention will be described below with reference to the drawings.

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

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

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

, 15n of the main unit 11 is provided with a public telephone network for connecting the station lines 21a, ..., 21n, and the telephone 22 is connected to each of the digital telephone interface units 16a ,.
22n and the data interface unit 23
, 23n and a plurality of digital telephones 24
, 24n are connected, the standard telephone interface unit 17 is connected to the modem 25, and the digital telephone interface unit 18 is connected to the data interface unit 26.

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

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

FIG. 2 shows the telephones 22a, ..., 2 shown in FIG.
2n and the data interface unit 23a, ..., 23
FIG. 3 is a block diagram showing in detail one of the two, namely, the telephone 22a and the data interface unit 23a.

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

As shown in FIG. 3, the ping-pong transmission circuit 30 has two B-channels (B-channel) having a speed of 64 kbps.
1B channel) and 1D channel having a speed of 16 kbps, and a time division channel of 2B + D format is used. The data terminal 28a and the telephone circuit 22 are used.
Ping-pong transmission of a digital signal is performed between a and the digital telephone interface unit 16a of the main device 11.

The ping-pong transmission circuit 30 receives the upstream data of each channel, synthesizes it into a data packet of 2B + D format, and transmits a digital signal to the digital telephone interface unit 16a.
And a 2B + D separating section 42 for receiving downlink data packets of the 2B + D format from the digital telephone interface unit 16a and separating the data for each channel.

Here, the B1 channel is assigned to the transmission of voice data transmitted and received by the telephone 22a during the telephone call of the digital telephone 24a, and the B2 channel is assigned to the transmission of communication data transmitted and received during the data communication of the data terminal 28a. The D channel data is assigned to the 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 is sent to the 2B + D creating section 41 as the B1 channel upstream data B1-IN, and the communication data is sent from the data terminal 28a during the data communication to the driver / driver.
B2 channel upstream data B2-IN is sent to the 2B + D creating unit 41 via the receiver 40, the selector 35, the serial / parallel conversion circuit 37, the parallel / serial conversion circuit 39, and the like, and the control data is a telephone control microcomputer. 31 or the data communication control microcomputer 32, and the 2B + D creating unit 41 as the D channel upstream data D-IN via the selector 33. The 2B + D creating unit 41 creates a packet and the transformer 44 or the like. Sent to the digital telephone interface unit 16a.

In addition, 2B from the digital telephone interface unit 16a via the transformer 44, the rectifier 43, etc.
The 2B + D packet sent to the + D creating unit 42 is B1.
Channel downlink data B1-OUT, B2 channel downlink data B2-OUT and D channel downlink data D
-OUT is separated and data B1-OUT is telephone 22
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 for telephone control. It is sent to the microcomputer 31 and the data communication control microcomputer 32.

The B2-channel upstream data B2-IN and the B2-channel downstream data B2-OUT are 8-bit serial data (64 kbps), respectively,
Of these, 6 bits are applied to the communication data RD (48 kbps), and the remaining 2 bits are applied to the reception carrier detection signal CD (8 kbps) and the transmission enable signal CS (8 kbps) of the RS-232D interface.

The remaining 2 bits of the upstream data 2B-IN are the transmission request signal R of the RS-232D interface.
S (8 kbps) and transmission enable signal SD (8 kbps)
Applied to.

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

Uplink communication data R from the data terminal 28a
D is input to the serial / parallel converter 37 via the driver / receiver 40 and the selector 35, converted into parallel data, and then the parallel / serial converter 3
9, a transmission request signal RS and a transmission enable signal CS
And 8-bit upstream data 2B-IN are created and sent to the ping-pong transmission circuit 30.

Here, the telephone control microcomputer 3
1 is control of the telephone set 22a by the downlink data D-OUT of the D channel from the ping-pong transmission circuit 30 (for example,
A bell is sounded, various displays are turned on and off, and control data corresponding to a signal (eg, hook signal, selection signal, etc.) from the telephone 22a is sent to the selector 33.

Further, the selector 33 selects the control data of either the telephone control microcomputer 31 or the data communication control microcomputer 32,
This control data is sent to the ping-pong transmission circuit 30 as the D-channel upstream data D-IN.

In selecting the control data, the telephone control microcomputer 31 controls the selector 33 to select its own transmission control data and inhibits 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 send the control data.
The control data is sent to 0, and the control data of the D channel is sent to the digital telephone interface unit 16a of the main unit 11.

FIG. 4 is a block diagram showing the internal structure of the data communication control microcomputer 32 shown in FIG. That is, the data communication control microcomputer 32 includes a D channel transmitter 50 that sends the D channel upstream data D-IN to the ping-pong transmission circuit 30, and a D channel receiver 51 that receives the D channel downstream data D-OUT. Is provided. The output signal of the D channel receiving section 51 is sent to the tristate buffer 52 and the address analyzing section 53. The control data for the data interface unit 23a subjected to the address analysis by the address analysis unit 53 is sent to the tri-state buffer 52, and the tri-state buffer 5 is sent.
2 control signal. Tristate Bach 52
The output signal of is sent to the data analysis unit 54 for data analysis.

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

The inverter 55 inversely converts the data analysis output signal, and the inversely converted data analysis output signal is transmitted from the driver / receiver 40 and the tristate buffer 59 provided on the output side of the data control unit 58. SD
It is sent to the received tristate buffer 60 and is used as a control signal for the tristate buffer 59 and the tristate buffer 60.

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

The transmission data SD sent from the data terminal 28a via the driver / receiver 40 is sent to the data monitoring unit 61 via the tristate buffer 60, and
The restoration request signal ER is sent to the restoration request monitoring unit 62.
When the transmission data SD is monitored, this data monitoring signal is sent to the data creating section 63, and when the recovery request signal ER is monitored, this recovery request signal ER is sent to the data creating section 63, and these data monitoring signal and recovery are sent. The request signals are combined and sent to the tristate buffer 64.

The tri-state buffer 64 is controlled by the control signal of the telephone control microcomputer 31 and is sent to the D-channel transmission section 50, and the selector 3
3 is sent to the ping-pong transmission circuit 30 as upstream data D-IN of D channel.

In this way, the downlink data D-OUT of the D channel sent from the ping-pong transmission circuit 30 is received, the data is analyzed, and the called display signal CI, the data set ready signal RD, and the communication data RD are obtained. The data is separated and sent to the data terminal 28a via the driver / receiver 40, and data is created by the transmission data SD and the restoration request signal from the data terminal 28a, and the ping-pong transmission circuit 30 is used as the D-channel upstream data D-IN. Sent to.

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.

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

These ping-pong transmission circuits 80 have the same structure as the ping-pong transmission circuit 30 in the data eater interface unit 23a shown in FIG. 3, but the ping-pong transmission circuit 30 operates in the slave mode, whereas the ping-pong transmission circuit 80 operates. The difference is that the circuit 80 operates in master mode. That is, the ping-pong transmission circuit 80 takes the initiative in the packet 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 sends the upstream and downstream data of the B channel to the PCM.
The ping-pong transmission circuit 80 is notified 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 upstream and downstream data at a speed of 2.048 Mpbs.

Microcomputer 8 for control data communication
3 monitors the 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
Reference numeral 6 denotes a ping-pong transmission circuit 90, a data communication control microcomputer 91, 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 in FIG.
It is similar to the data interface unit 23a that connects to the data terminal 28a described above. However, there is a difference that the data interface unit 23a is set to the terminal mode for the data terminal 28a, whereas the data interface unit 26 is set to the terminal mode for the modem 25. In other words, 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 upstream control data for telephone control and data communication control is selected. There is no selector to do it.

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

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

This standard telephone interface unit 1
The control data communication microcomputer 107 provided in FIG. 7 sends a calling signal to the calling signal sending circuit 100, the DC power feeding circuit 102, the dial detecting unit 103, etc., stops the calling signal, monitors the opening and closing of the DC loop, controls the reversal of the polarity, and dials. It monitors the pulse detection result and communicates control data with the control unit 12 through the data highway 13.

In FIG. 8, the main unit 11 is connected to the central line 2 of the public telephone network.
Station line interface unit 15 for connecting to 1a
a is shown.

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

The interface circuit 110 includes a station line 21.
A station call signal detection circuit 114, a polarity reversal detection circuit 115, and a DC loop circuit 116 connected to a 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 pulse to the station line 21a, etc.

The codec section 111 converts the audio signal into an A / D signal.
DC loop circuit 11 for conversion and D / A conversion
By forming a DC loop in the station line 21a by 6, the AC coupling is performed in the station line 21a.

The calling signal detection circuit 114, the polarity reversal detection circuit 115, the DC loop circuit 116 and the codec section 111 are connected to the respective station line interface units 15a,
..., several sets are mounted for every 15n.

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

The codec section 111 transmits / receives voice data to / from the PCM highway 14 at the time designated by the time slot assigner 112.

Microcomputer 1 for control data communication
Reference numeral 13 is for monitoring the detection signals of the calling signal detection circuit 114 and the polarity reversal detection circuit 115, for controlling the DC loop circuit 116, and for detecting the calling signal with the control unit 12 through the control data highway 13, for detecting the polarity reversal, and for the DC loop. Control data related to opening / closing, sending dial pulses, etc. is sent and received.

FIG. 9 shows the office line interface unit 15a and digital telephone interface unit 16 described above.
a, a microcomputer 19 inside the control unit 12 for controlling the standard telephone interface unit 17, etc. is shown to perform 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. This control data is decoded by the data receiving unit 120. For example, if the decoded signal is an incoming signal from the office line 21a, the modem selecting unit 121 is activated and the information in the modem busy table 122 is read.

The modem busy table 122 has a modem 25
Information indicating the current status of, ie, vacancy, busy, etc. is written in advance. Modem selection unit 121
However, while referring to the information of the modem busy table 122, it selects one modem 25 in an empty state and sends a control signal for selecting the modem 25 to the command sending unit 123. The command transmission unit 123 uses the selected modem 2
Incoming data to call 5 data highway 13
To the standard telephone interface unit 17 via.

When the decoding result in the data receiving section 120 is the response of the modem 25 to the incoming data, this response signal is notified to the command transmitting section 123 and the time switch control section 124. Then, the command transmission unit 123
Instructs the station line interface unit 15a to close the incoming loop (supplement of the station line), and the time switch control unit 124 controls the time switch circuit 20 so that the station line interface unit 15a and the standard telephone set. The interface unit 17 is connected. This establishes a communication path between the modem 25 and the calling data device.

The modem busy table 122 is rewritten as busy because the modem 25 becomes busy from the idle state.

The decoding result of the data receiving section 120 is
When the extension number is input 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.
.., 23n of each digital telephone set 24a, ..., 24n is written in the data interface unit busy table 126 (empty or busy).

Data interface unit selection section 12
5 is a data interface unit 23a, ..., 23
From n, a specific one data interface unit, for example, the data interface unit 23a is read from the data interface unit busy table 126, and if it indicates a vacancy, the extension number of the data interface unit 23a is notified to the command sending unit 127. It Then, the command transmission unit 127 causes the data interface unit 23a to send data to the data terminal 2
Incoming data is sent to call 8a. By this operation, the data interface unit busy table 126 is rewritten from the empty state to the busy state.

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

The command sending unit 128 sends a modem connection command indicating the connection between the data terminal 28a and the modem 25 to the data interface unit 23a and the data interface unit 26, and the time switch control unit 129 sets the time switch circuit 20. It controls and connects 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, and as a result, data communication between the data terminal 28a and the calling side data equipment with the central office 21a or the like is performed through the public telephone network. 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 the off-hook state, the command sending unit 130 and the time switch control unit 131 are notified of this state.

The command transmission unit 130 instructs the station line interface unit 15a to release the straight line loop of the station line 21a, and the data interface unit 2
Disconnection data indicating disconnection of the communication path is sent to 3a.
The time switch control unit 131 includes the time switch circuit 2
0 is controlled to disconnect both communication paths between the modem 25 and the office line interface unit 15a and between the modem 25 and the data interface unit 23a.

This completes the data communication. Also,
Status of modem 25 in modem busy table 122 and data interface unit busy table 126
The state of the data interface unit 23a therein is rewritten from busy to empty.

In FIG. 10, as in FIG. 9, the microcomputer 19 uses the "call + dial signal" from the data terminal 28a to connect the digital telephone 24a and the data interface unit 23a, and the digital telephone 24a is in the calling state. 7 shows another example of the control so that

The microcomputer 19 is provided with the data receiving unit 120, the data interface unit 23a in which the "outgoing + dial signal" from the data terminal 28a is integrally connected to the digital telephone 24a, and the control data highway of the main unit 11. It is designed to be received via 13. A control data identifying unit 140 for identifying control data is connected to the data receiving unit 120, and an output signal thereof is sent to the digital telephone connection control unit 141 and the destination identifying unit 142.

A redial memory unit 143 and a digital telephone liquid crystal display control unit 144 are connected to the digital telephone connection control unit 141 to store and display dial signals.

Further, the other party identification section 142 is connected with the data interface unit connection control section 145, the on-hook transmission + pseudo dial creating section 146, the digital telephone connection control section 141, etc., and the other party identification section 142.
These signals are mutually controlled by the output signal of.

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

If the identification bit is "0", it is identified as the control data from the digital telephone 24a, and "1".
Is identified as the control data from the data interface unit 23a. Dial signal for control data,
"D" signal for calling the data terminal 28a, other carriage return signal, on-hook dial signal,
Includes off-hook dial signals, etc.

When the data receiving section 120 receives the "calling + 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
The return signal and the dial signal of the data interface unit 23a are 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 transited to the data interface unit connection control unit 145, and the data interface unit 23a is in a call state so as not to receive an incoming call.

When the digital telephone connection control unit 141 receives a dial signal, the digital telephone 24a is in an on-hook dial state (a state in which dialing is performed with the handset of the digital telephone 24a left and a call back tone can be heard from the speaker of the digital telephone 24a). If the other party answers, you can pick up the handset and talk.

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

When the other party responds, the receiver of the digital telephone 24a is taken off and put in the off-hook state. This off-hook signal is sent to the control data identifying section 140 and the digital telephone connection control section 141, and puts the digital telephone 24a into a call state.

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

When the data receiving section 120 receives a carriage return signal from the data terminal 28a while calling the other party's digital telephone 24a, the control data identifying section 1
40, the digital telephone connection control unit 141 and the data interface unit connection control unit 145 receive the call end signal via the partner identification unit 142, and the digital telephone 2
4a and the data interface unit 23a are set in an idle state to end the call.

When the other party is in a call, it is stored in the redial storage section 143 by operating the redial key from the digital telephone 24a or by inputting a "call + redial signal" from the data terminal 28a. The dial signal can be transmitted immediately and the redial operation can be started.

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

Also, although the "calling + dial signal" is sent from the data terminal 28a, the "calling + dial signal" of the data terminal 28a is sent.
"Call +" from the digital telephone 24a
It can be sent by adding it to the "dial signal", or conversely, can be sent by adding the "call + dial signal" from the digital telephone 24a to the "call + dial signal" of the data terminal 28a. .

[0085]

As described above, according to the data communication control method of the present invention, the "calling + dial signal" from the data terminal or the like is sent to the microcomputer via the data interface unit to which the digital telephone is connected, By placing the digital telephone in the outgoing state under the control of this microcomputer, it is possible to make a substitute outgoing call using the "outgoing + dial signal" from the data terminal as the outgoing call of the digital telephone.

[Brief description of 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.

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

FIG. 4 is a block diagram showing an outline of the microcomputer for controlling data communication in FIG.

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

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

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

FIG. 8 is a block diagram showing an outline of the office line interface unit of FIG.

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

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

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

[Explanation of symbols]

 10 data communication control device 11 main device 12 control unit 13 data highway 14 PCM highway 15a station 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 station 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 slots Signer 83 Microcomputer for control data communication 90 Ping-pong transmission circuit 91 Microcomputer for data communication control 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 identification 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

Claims (1)

[Claims] 1. A data communication control method comprising a data terminal, a digital telephone, a data interface unit in which the digital telephone is integrated, and a main device having a microcomputer. In the data communication control method, transmission information and dial signals from the data terminal are transmitted to the data interface unit. A data communication control method, characterized in that the digital telephone is sent to the microcomputer via the CPU and the digital telephone is set to an outgoing state by the microcomputer control.