JP2001211267A - Communication system, method for controlling communication system, and computer-readable storage medium storing control program of communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system, that can simply and inexpensively communicate data such as facsimile communication at a low cost with high compatibility, through the easy operation during a three-party speech. SOLUTION: A control station 103 uses 2B channels of a public network 102 (ISDN) to be connected to two stations of opposite terminals (100, 101 and 108) so as to make a three-party speech among handsets or wireless phones 104. When detecting a facsimile original during the three-party speech, a channel being connected is selected, and facsimile transmission is applied to a corresponding opposite station or the channel is interrupted, when a new telephone number is received to make facsimile transmission to the opposite station of the entered telephone number. Furthermore, when detecting a facsimile modem signal during the three-party speech, or a manual line selection is operated on the basis of the line indication, facsimile reception is made from the channel detecting the modem signal or from the selected channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication apparatus which accommodates a digital public line interface such as ISDN (Integrated Services Digital Network) and has at least one extension telephone function and data communication function, a control method thereof, and The present invention relates to a computer-readable storage medium storing the control program.

[0002]

2. Description of the Related Art In recent years, ISDN (Integrated Services Digital Network) has become widespread. In the basic interface of ISDN, two B channels of 64 kbps,
It is possible to use a plurality of so-called "2B + D" channels including D channels used for outgoing / incoming control between networks.

Conventionally, there has been proposed a system which enables a three-party or conference call by simultaneously using a plurality of "2B + D" channels.

[0004] For example, Japanese Patent Application Laid-Open No. H06-253028 describes a simple three-party communication system capable of making a conference call without burdening a subscription fee to a conference call service provided by a network. In the technology described in the publication, without using a conference device, each subscriber terminal makes a call in a relay manner, sequentially sets up a communication path, and synthesizes and transmits downstream voice from a network to transmit conference communication. Do.

Japanese Patent Laid-Open Publication No. Hei 06-261198 discloses that a non-standard protocol is used when a facsimile transmission request is issued during the exchange of moving image information and the exchange of voice information as in conference communication. A technique is disclosed in which the communication speed used for facsimile communication is determined, the execution of exchange of moving image information and audio information is not stopped, and the transmission time of data is not lengthened.

[0006]

In the case of a three-party call or a conference call, the demand for performing image communication (by facsimile or the like) to confirm the contents of documents and materials during the call is naturally expected. However, the prior art does not propose a communication method that satisfies such demands, has high compatibility, and can be implemented easily and inexpensively.

[0007] For example, of the above,
In the communication system described in Japanese Patent No. 3028, a three-party conference can be held without receiving service by a network by synthesizing audio information or image information. There is no disclosure of a means for transmitting different data. For example, when a facsimile is to be sent to an arbitrary party during a three-party call, the only option is to request the other party during the three-party call to disconnect.

Japanese Patent Application Laid-Open No. 06-261198 describes that facsimile transmission / reception is performed without disconnecting a call connection during connection of a three-party (conference) call. There is a problem in that control by a protocol is required, the configuration becomes complicated and expensive, and since a non-standard protocol is used, the functions cannot be used except by the same system.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a three-way telephone call, and to easily and inexpensively perform data communication such as facsimile communication with easy operation during the telephone call.

[0010]

SUMMARY OF THE INVENTION In order to solve the above problems, according to the present invention, a digital public line interface such as an ISDN (Integrated Services Digital Network) is accommodated, and at least one extension telephone function and data communication are provided. A communication device having a function, a control method thereof, and a computer-readable storage medium storing a control program thereof, a first communication control for connecting a B-channel at the time of outgoing or incoming and performing a first communication, and an outgoing or incoming communication A second communication control for connecting a B channel and performing a second communication at the time of an incoming call is performed, and a three-party call is performed using the first and second communication, and data to be transmitted during the three-party call And displaying line information of the first communication and the second communication, based on the information displayed in the display step. Select the circuit performs over data transmission adopts the configuration in which the data transmission to the line selected by the line selection process.

Alternatively, the data communication is facsimile communication using an analog modem signal, and data to be transmitted and received is facsimile image data.

Alternatively, a configuration is adopted in which the line is selected when a document to be transmitted by facsimile is detected.

Alternatively, after the line is selected by the line selection, if dial information is input from key input means for inputting dial information, the line selected by the line selection is disconnected, and the vacant line is used. The data communication configuration is adopted.

Alternatively, a first communication control for connecting the B channel at the time of calling or receiving and performing the first communication and a second communication control for connecting the B channel at the time of calling or receiving and performing the second communication are performed. A three-party call is made using the first and second communications, a modem signal of the first communication and the second communication is detected, and a line for receiving data is selected based on the detection result of the modem signal. Then, a configuration for receiving data from the selected line is adopted.

Alternatively, a first communication control for connecting the B channel at the time of calling or receiving and performing the first communication and a second communication control for connecting the B channel at the time of calling or receiving and performing the second communication are performed. A three-party call is made using the first and second communications, line information of the first and second communications is displayed, and a line for data reception is selected based on the displayed information. And a configuration for receiving data from the selected line.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. Hereinafter, a system using a network based on ISDN and PHS / PIAFS will be exemplified.

First Embodiment (System Configuration) FIG. 1 shows a system configuration diagram of a communication system according to the present invention. The communication system mainly includes the control station 1
03, a wireless telephone 104, and a wireless terminal station 107.

The control station 103 is a public network (ISDN) 10
2 and a PSTN communication service and G
Provides a 3 facsimile communication function. The configuration of the control station 103 will be described later in detail with reference to FIG.

The radio telephone 104 exchanges control data or voice data with the control station 103 by radio, performs voice communication via the public network 102, and performs so-called inter-extension communication between a plurality of terminal stations. .

The wireless terminal station 107 includes a wireless adapter 105
And a data terminal or peripheral device 106. The wireless adapter 105 performs control data communication and data communication with the control station 103. The data terminal or the peripheral device 106 is connected to the wireless adapter 105 and transmits and receives data via the wireless adapter 105.

Terminals 100, 101, and 108 for transmitting and receiving data such as voice information or image information are connected to public network 1
02.

Among the above, the data terminal or the peripheral device 1
Reference numeral 06 denotes a terminal device (data terminal) having a function of transmitting and receiving data in a burst manner or a device to which a wireless adapter 105 for performing wireless communication with a data input / output device can be connected, for example, a computer, a multimedia terminal, In addition to a printer, a facsimile, a copying machine, and a LAN gateway, devices such as an electronic camera, a video camera, and a scanner are applicable.

Hereinafter, the detailed configuration and operation of each of the above-mentioned components will be described.

(1) Control Station FIG. 2 shows the internal configuration of the control station (network control terminal) 103 in FIG.

In FIG. 2, reference numeral 201 denotes a main control unit which controls the overall control of the control station 103 and has a timer means for managing communication and managing each wireless terminal station.

Reference numeral 202 denotes a ROM in which a control program according to the present invention is stored. The ROM 202 corresponds to the storage medium of the present invention.

Reference numeral 203 denotes a RAM, and the main control unit 20
The work 1 serves as a work area for control such as storing terminal type information and communication status in the process 1 and an image memory for storing data received during facsimile communication and data of a document read during transmission. In the present embodiment, the RAM 203 is described as one block, but it is naturally possible to have a work RAM, an image RAM, and a plurality of memory blocks.

Reference numeral 204 denotes a digital line interface unit, which is 64 Kbp from the public network (ISDN) 102.
s 2B channels, that is, two B channels (hereinafter referred to as B1 channel and B2 channel, respectively) and 16K
DSU (Digital Service Un) for receiving data of “2B + D” of D channel of bps
it). Digital line interface unit 204
Receives a serial signal such as an AMI signal, extracts a data part in a frame, outputs data as a PCM signal and control data to a digital switch unit 205 and a main control unit 201 at a predetermined timing, and outputs a digital switch unit The PCM signal from 205 and the control data from main control unit 201 are formed into a predetermined frame and transmitted to public network 102.

The digital line interface unit 20
4 is a LAPD (Link Access Process)
According to the protocol of “dure on the Dchannel”, in the communication with the partner terminal via the main control unit 201, exchange of control data called call control is performed using the D channel and LAPB (Lin).
k Access Procedure on the
The transmission and reception of audio data and image data are performed by using the B channel according to the protocol of Bchannel.

The digital line interface unit 20
4 has HDLC (High-level Dat) inside.
a Link Control) control procedure.
Via the DN network, the B channel is assembled into a predetermined frame, and unlimited digital data communication can be performed at a communication speed of 64 Kbps or at a communication speed of 128 Kbps using two B channels at the same time.

Reference numeral 205 denotes a digital switch unit.
The PCM signal between the wireless communication processing unit 206 and the serial signal between the serial communication control unit 221 are switched, and the serial signal is transmitted to the digital line interface unit 2.
Transmission and reception of serial data are performed by using the B1 channel or the B2 channel via the channel 04.

Reference numeral 206 denotes a wireless communication processing unit, which is configured using a device generally called a channel codec or a baseband IC. Wireless information processing unit 206
Performs processing such as scrambling on ADPCM-coded information, time-division multiplexing into predetermined frames,
It controls switching of transmission / reception of the RF unit 207 described later, frequency switching, and the like. It also has functions to perform intermittent reception processing, carrier detection, level detection, and bit synchronization.

In the radio communication processing unit 206, the data assembled into a radio frame and modulated by the modulation unit
The signal is transmitted to the target wireless terminal (104 or 107 in FIG. 1) via the unit 207. In addition, a PCM interface is provided inside, and a COD between an analog signal and a PCM signal is provided.
ER-DECODER processing is performed. In addition, the wireless communication processing unit 206 can perform 32 Kbps or 64 Kbps data communication from an ISDN network or an extension telephone using the PIAFS protocol for enabling wireless data communication. This wireless communication processing unit 206
Will be described later with reference to FIG.

Reference numeral 207 denotes an RF unit, which is an R signal modulated by transmission data input from the wireless communication processing unit 206.
The F (high-frequency) signal is converted into a format that can be wirelessly transmitted and sent to the antenna, and data modulated from a signal wirelessly received from the antenna is demodulated and output to the wireless communication processing unit 206.

Reference numeral 208 denotes an analog switch unit.
It mainly switches the path of the audio signal. That is, the analog switch unit 208 switches input / output of signals from the modem unit 212 and input / output signals of analog units such as the sound source unit 209, the handset 210, and the speaker 211 to and from the wireless communication processing unit 206 under the control of the main control unit 201. Do.

Reference numeral 209 denotes a sound source for outputting a hold tone or a call progress tone such as DT (dial tone), BT (busy tone), and RBT (ring back tone).

Reference numeral 210 denotes a telephone handset for inputting and outputting voice.

Reference numeral 211 denotes a speaker, which outputs a ring tone or stored voice data and monitors the fax communication. The modem unit 212 performs facsimile transmission and reception based on the G3 standard. Key input unit 213
Are dial keys such as 0-9 and * and # for inputting dial numbers, etc .; transmission and reception keys for controlling facsimile transmission / reception; off-hook keys for controlling line ON / OFF; and other holding keys and function settings. And the like.

Reference numeral 214 denotes a display unit for displaying a time, a line being communicated, an error display, and the like, and is mainly composed of a liquid crystal or the like.

Reference numeral 215 denotes a hook detection unit which detects ON / OFF of the handset and controls ON / OFF of the line.

Reference numeral 216 denotes a thermal type, thermal transfer type printer,
Alternatively, it is a recording unit including a recording mechanism using a known recording method such as a laser beam printer or an ink jet printer, and is mainly used for recording and outputting a facsimile image. For this purpose, the recording unit 216 has a function of decoding MH, MR, or MMR-encoded digital data, and can record and output the decoded data.

Reference numeral 217 denotes a reading unit constituted by known document reading means such as a CCD or a contact type sensor array and a document conveying system, and converts analog data read from a document into digital data. The reading unit 217 is mainly used for reading a facsimile image. For this reason, image data read by an encoding method such as MH, MR, or MMR can be encoded and output.

Reference numeral 218 denotes a document detection unit, and the reading unit 2
16 to detect the presence or absence of a transmission original, and notify the main control unit 201 of the result.

Block 220 (within broken line)
May constitute a unit for facsimile image input / output and a user interface, and may be constructed as one unit having an operation panel.

Reference numeral 219 denotes an address and data bus, which is used by the main control unit 201 to control each unit.

Reference numeral 221 denotes a serial communication control unit which controls serial communication such as HDLC.

Reference numerals 222 to 228 indicate audio signals input and output by the analog switch unit 208. Code 22
2 is a hold tone output from the sound source unit 209, 223 is a call progress tone such as DT, BT, RBT, etc., output from the sound source unit 209. 224 is a first analog signal and a radio signal output from the wireless communication processing unit 206. Communication processing unit 2
6 shows a first analog signal input to the signal line 06.

Reference numeral 225 denotes a wireless communication processing unit 206.
The second analog signal output from the wireless communication processing unit 206 and the second analog signal output from the handset 210 and the analog signal input to the handset 210 are input to the speaker 211. The output analog signal 228 is an analog signal output from the modem unit 212 and an analog signal input to the modem unit 212.

(Description of Configuration and Operation of Wireless Communication Processing Unit) FIG.
2 shows a configuration of the wireless communication processing unit 206 of the control station 103 in FIG. Hereinafter, an outline of the configuration and operation of the wireless communication processing unit 206 will be described. The wireless communication processing unit 206 includes the following units.

The modulating section 301 modulates data that is assembled into a frame and input, and outputs the modulated data to the RF section 207. Demodulation section 302 demodulates the modulated data output from RF section 207 and converts it into a digital signal.

The frame assembling unit 303 composes data set in various buffers to be described later into predetermined frames defined by the RCR-28 standard. The frame decomposing unit 304 decomposes digital data having a frame configuration output from the demodulation unit 302 and extracts data.

The A / D converter 305 is connected to the RS from the RF.
It receives the SI signal and performs analog / digital conversion. Level detection section 306 compares the digital signal from A / D converter 305 with a predetermined level. The synth control unit 307 outputs data for setting a PLL provided in the RF unit 207.

The main control unit I / F unit 308 includes the main control unit 20
A bus 219 connected to the control unit 1 is accommodated, and control data is written / read to / from the main control unit 201.

The transmission buffer 309 temporarily stores data to be transmitted every 5 ms when transmitting data, and the reception buffer 310 temporarily stores data decomposed by the frame decomposing unit. The buffer to put.

The ADPCM interface 311 temporarily stores audio data in order to form audio data compressed to 32 Kbps by an ADPCM codec, which will be described later, into a predetermined frame.
5 ms of audio data decomposed by 0 is temporarily stored. The sound source section 312 digitally stores PB signals, signals such as BT and DT, ringtones, and the like.

The PCM codec 313 converts the input analog signal once to a 64 Kbps PCM signal after A / D conversion, and sends it to the data transcoder / selector 314, and also converts the 64 Kbps digital signal from the data transcoder / selector 314 to A / D conversion. It has at least two functions of performing a / D conversion and outputting it as an analog signal to the analog switch unit 208.

The data transcoder / selector 314 converts ADPCM data input / output signals to the ADPCM interface 311 from PCM codec 313 to PCM data by ADPCM conversion and inputs / outputs them.
ADP with PCM data from M interface 316
Choose whether to convert and input and output CM, and 32K
It has two systems for transcoding ADPCM data of bps and data of 64 Kbps.

Data Transcoder / Selector 314
Further selects an output destination of data input / output to / from the data input / output unit 318, and selects a path for connecting the PCM codec 313 and the PCM interface 316 as a 64 Kbps PCM signal through. Also do.

The analog I / F 315 controls the level of analog input / output signals 224 and 225 between the PCM codec 313 and the analog switch unit 208.

The PCM interface 316 is 64K
At a data transmission speed of bps, the digital switch unit 205
In addition, conversion of the PCM signal and input / output of data are performed with the data transcoder / selector 314, and the PCM signal is synchronized with the public network 102.

The burst data I / F 317 temporarily stores the burst data signal decomposed by the frame decomposing unit 304 and outputs the burst data signal to the data input / output unit 318 as a 32 Kbps serial signal.
The digital data input at 32 Kbps is temporarily stored for a predetermined frame.

The data input / output unit 318 performs a process of switching data input / output at 32 Kbps using ADPCM data and burst data.

The PIAFS control section 320 controls the public network 102
When the incoming call indicates the PIAFS mode of the unrestricted digital communication, the digital line interface 20
4. Connected to the data input / output unit 318 of the wireless communication processing unit 206 via the digital switch unit 205. PIA
In the case of the FS communication, the data input / output unit 318 connects the communication path to the PIAFS control unit 320 and the PIAFS control unit 3
Data communication is performed by detecting a predetermined frame in the data received by 20 and extracting the data.

FIG. 4 shows the configuration of the analog switch unit 208 shown in FIGS. 2 and 3. Analog switch part 2
08 has a switch control unit 431. The switch control unit 431 performs path control of the analog signals 222 to 228 shown in FIGS. 2 and 3 based on the control of the main control unit 201.

The switch control section 431 includes a switch 401
To 430 are turned on / off to perform analog signal path control. At this time, by turning on switches 401 to 430 at the intersections of the illustrated switch matrix,
Path control of the analog signals 222 to 228 is performed. For example, the analog output 1 from the wireless communication processing unit 206
To connect (224) to the analog input 228 to the modem 212, the switch 415 is turned ON.

FIG. 5 shows the appearance when the display section 214 and the key input section 213 in the present system are configured as panels as operation panels.

In FIG. 5, reference numeral 501 denotes a function key for starting various function settings, reference numeral 502 denotes a display panel for displaying the use status of the line and setting of the function, and reference numeral 503 denotes a hold key for holding the line. Reference numeral 504 denotes a transmission key for prompting facsimile transmission, reference numeral 505 denotes a reception key for prompting facsimile reception, reference numeral 506 denotes a select key for changing a mode at the time of function setting, reference numeral 507 denotes a set key for setting the selected mode, and reference numeral 508 denotes a dial. It is a numeric keypad for inputting information.

Of the above, the display panel 502 is used for displaying and selecting a line during three-party communication according to the present invention.

Hereinafter, the operation in the above configuration will be described in detail. FIG. 6 shows an outline of control when a three-party call is performed using the present system.

In this embodiment, for convenience, the communication channel used for the first communication is the ISDN B1 channel, and the communication channel used for the second communication is the B2 channel.

When the main control unit 201 receives the off-hook information of the handset 210 from the detection unit 215, it determines that there is a first call (step S101), and determines the line channel to be used (in this embodiment, the B1 channel is changed to the B1 channel). Use), and further controls the analog switch 208 (FIG. 4) to turn on the switch 409 to output a 400 Hz dial tone to the handset 210.

Further, after the step S101, when the dial number is inputted from the ten keys 508, the display panel 5
In addition to displaying the dial number in 02, the digital line I / F 204 is controlled, and a calling process is performed using the dial number input from a ten key or the like. After this calling process, when there is a response from the partner terminal 100 (FIG. 1), the main control unit 201 connects a digital communication path between the digital switch unit 205 and the wireless communication processing unit 206 and receives a call from the wireless communication processing unit 206. The analog signals 224 and 226 are input / output via the analog switch unit 208 using the analog signals 224 (step S102).

Here, the details of the operation during a call will be described with reference to FIGS. The main control unit 201 inputs the data signal from the digital switch unit 205 to the PCM interface 316, and controls the data transcoder / selector 314 to connect to the PCM codec 313 through PCM through. The PCM codec 313 performs D / A conversion of the received PCM data conversion and outputs the data to the analog switch unit 208.

The analog signal 224 from the analog switch unit 208 is converted into 64 bits by the PCM codec 313.
The data is A / D converted to PCM data of Kbps, and transmitted from the PCM interface 316 to the digital switch unit 205 via the data transcoder / selector 314.

The main control unit 201 controls the analog switch unit 208 to turn off the tone transmission (turns off the switch 409), and the first communication from the wireless communication processing unit 206.
Is connected to the analog input 226 of the handset 210 (switch 414 is turned on). Further, the analog signal 226 from the handset 210 is connected to the first analog input 224 of the wireless communication processing unit 206 (the switch 422 is turned on).

In this way, the handset 210, the analog switch unit 208, the wireless communication processing unit 206, the digital switch unit 205, the digital line I / F 204, and the public network 102 are connected, and a first call is established.

To make a three-party call during the first call, first press function key 501 (FIG. 5). At this time, a three-way call is selected using a select key 506 from an appropriate menu displayed on the display panel 502, and a set key 507 is set.
Is pressed to start the three-way call start process (step S103).

When the three-way call start process is started, as shown in FIG. 5, the main control unit 201 causes the display panel 502 to display a line (such as “line 1:” and “line 2:”) on the display panel 502, respectively. In addition to displaying the use status of the two B channels of ISDN, the cursor is displayed on a free line (line 2 in this embodiment) to prompt the user to input a dial number. Further, the analog switches 414 and 422 are turned off, and the switch 402 is turned on to transmit a hold tone to the first communication partner 100. Further, the switch 409 is turned on, and DT (dial tone) is output to the handset 210. Then, a notification is given using the hold key 503 or the display panel 502 that the hold is being performed (step S104).

Thereafter, in the same manner as described above, the input of the dial number and the calling process using the B2 channel are performed, and if there is a response from the partner terminal 101, the main control unit 201 sets the second of the wireless communication processing unit 206. PCM codec 31
3. It controls the data transcoder / selector 314, analog I / F 315, and PCM interface 316.

Further, the analog switch 208 is controlled,
The tone signal 223 from the sound source unit 209 is stopped, and the second analog signal 225 from the wireless communication processing unit 206 is connected to the analog input 226 of the handset 210 (the switch 409 is turned off and the switch 419 is turned on). Also, the analog signal 22 from the handset 210
6 to the second analog input 225 of the wireless communication processing unit 206.
(Switch 423 is turned on). The second call is established by such processing. After the second call is established, when the main control unit 201 detects that the hold key 503 has been pressed (step S105), the switch 402 is turned off, and the analog switches 414 and 422 and the switch 413,
By turning on 417, a three-party call with the partner terminals 100 and 101 can be performed using the handset 210 (step S106).

In this embodiment, the control station 103 originated a call for both calls, but the same operation and connection processing as described above may be performed in the case of transition from incoming call to three-party call.

Further, FIG. 7 illustrates the control for transmitting a facsimile to the partner terminal 100 (B1 channel) during a three-party call. That is, another communication, in this case, facsimile transmission, is performed to the communicating party without using the non-standard protocol.

In FIG. 7, two Bs used for a three-party call are used.
If there is a vacancy in the channel, it is used. If there is no vacancy, the user is allowed to select a line for facsimile transmission, and the channel is used by using the line (to the other party connected by the line (channel)). Start facsimile transmission.

That is, the main control unit 201 monitors the state of the system during a three-party call (step S 201), and receives the on-hook signal of the handset 210 from the hook detection unit 215 or the disconnection of the partner terminals 100 and 101 to cause the three-party communication. When it is detected that the call has ended (step S20)
2), the digital line I / F 204 is controlled to exchange commands such as disconnection and release, and the communication using the public network 102 is terminated (step S213). This system side,
Alternatively, when disconnection from the partner terminals 100 and 101 is not detected (step S202), the output of the document detection unit 218 is checked to determine whether or not a detection signal indicating that there is a transmission document is output (step S203).

When the main control unit 201 receives a signal indicating that a transmission document for data transmission has been set from the document detection unit 218 during a three-way call, the key input unit 213
Enter the line selection information from.

At this time, if a document is set, the main control unit 201 displays a cursor on the display unit 214 (display panel 502) together with the display of "line 1:" or "line 2:", and inputs a dial number. Make it possible. Also,
The user selects which of "line 1:" and "line 2:" to enter the dial number by pressing the up or down arrow key of the select key 506 (step S204).

Here, the user can transmit a facsimile to a party unrelated to the three-way call by inputting a new number.

By pressing the select key 506 without inputting a new number (step S214 described later),
The same party talking on one of the lines is selected and a facsimile is sent to that party. In this case, the line is not released, and the G3 facsimile communication is performed using the already established voice communication channel.

That is, if there is no input of a dial number from the numeric keypad 508 of the key input unit 214 after step S204 (step S205), it is determined whether or not the select key 506 is pressed with the line selected by the cursor. It is detected (step S214). If the select key 506 is not pressed, the line monitoring process is continued (step S201).

If the select key 506 is pressed in step S214, the main control unit 201 determines that the line specified by the cursor on the display panel 502 is the line to be used for facsimile transmission, and the analog switch unit 20
8 is controlled (step S215). That is, the analog output 228 from the modem unit 212 for transmitting the facsimile signal is converted to the analog input 224 of the wireless communication processing unit 206.
The switch 427 is turned ON to connect to. Also,
The switch 415 is turned on to connect the analog output 224 from the wireless communication processing unit 206 to the analog input 228 of the modem unit 212 that receives the facsimile signal. However, the three-way call by the handset 210 is maintained until this time.

After the step S215, when the main control unit 201 detects that the facsimile transmission key 504 of the key input unit 213 has been pressed (step S216), the main switch 201 controls the analog switch 208 to end the three-way communication, and the one of the 2B channels To perform facsimile communication. At this time, under the control of the analog switch 208, the wireless communication processing unit 206 prevents the sound of the modem signal from entering the call on the B2 channel.
The path of the analog input / output 228 between the analog input / output 225 and the modem unit 212 is disconnected. Specifically, the switches 413, 414, 417, and 422 are turned off. At this time, in order to monitor the modem signal, step S41 is executed.
1 may be turned on to transmit a modem signal to the speaker 211. After such switch control, facsimile transmission / reception with the partner terminal 100 is performed. That is, the document data read by the reading unit 217 is encoded,
The data is modulated by the modem unit 212 and transmitted according to the analog facsimile procedure of the T30 protocol (step S21).
7).

At this time, the other party shifts to facsimile reception by performing the control of FIG. 8 described later, or if a terminal such as a facsimile-integrated analog telephone is connected to an analog interface such as TA. Facsimile reception can also be performed by switching the terminal to the facsimile mode.

On the other hand, when the transmission original is detected, the line to be used is selected, and a new dial number is input from the ten keys 508 of the key input unit 214 (step S).
205), the main control unit 201 has a digital line I / F2
04 to release the channel by disconnecting the selected line. Here, the analog switch unit 208
In the control of (2), input / output 2 to the wireless communication processing unit 206
24 and the input / output 226 to the handset are turned off. Specifically, the switches 413, 414, 417, 42
2 is turned off (step S206). Numeric keypad 50
If the input of a new dial number has been completed from step 8 (step S207), it is detected whether the facsimile transmission key 504 has been pressed (step S208).

When the facsimile transmission key 508 is depressed, the main control unit 201 controls the original reading unit 217 to read the transmitted original. When the reading is completed, the digital line I / F 204 is controlled based on the input dial number, and a call is made to another terminal 108 (FIG. 1) using the T30 protocol (step S209). After calling, other terminal 1
08, the digital line I / F
204 to control the channel and connect the analog switch 2
08 by controlling the analog input / output signal 228 from the modem unit 212 to the analog input / output 22 of the wireless communication processing unit 206.
Connect to 4. Specifically, the switches 415 and 427 are set to O
N. As a result, an analog connection is established with the partner terminal, and facsimile communication using the T30 protocol is started by the modem unit 212 (step S209).

With the above processing, if it is determined in step S211 that communication by the modem unit 212 is started and communication is possible by a training signal or the like, facsimile communication and voice communication using the 2B channel are continued (step S212).

In the above description, an example in which facsimile communication is started during a three-party call has been described. Needless to say, data communication other than facsimile can be performed as long as the modem performs data communication of another system. Nor.

As described above, data communication can be started during a three-party call, and non-standard protocols are not used. Therefore, the present invention can be implemented simply and inexpensively, and the compatibility between devices can be impaired. Absent.

Hereinafter, the other party terminal 100 (communication using the B1 channel) during a three-way call using the flowchart of FIG.
The operation when a facsimile is received from will be described. According to the procedure of FIG. 8, facsimile transmission started by the procedure of FIG. 7 can be received.

In FIG. 8, the main control unit 201 monitors the state of the system during a three-party call (step S301).
When the detection of the on-hook of the handset 210 or the termination of the three-party call due to the disconnection of the partner terminal 100 or 101 (FIG. 1) based on the detection signal from the hook detection unit 215 (step S302), the digital circuit I
/ F 204 is controlled to exchange commands such as disconnection and release, and the communication using the public network 102 is terminated (step S310).

On the other hand, the system or the partner terminal 100, 1
01 is not detected (step S30).
2) It is detected whether there is facsimile transmission from the partner terminals 100 and 101 during the three-way call. This detection process combines the analog output 1 (224) and the analog output 2 (225) from the wireless communication processing unit 206 during a three-way call, and always inputs a signal to the analog input 228 to the modem unit 212. I do. Specifically, the switches 415 and 420 are turned on in addition to the switches for the three-party call.

If a signal indicating that a modem signal has been received is output from modem section 212 (step S303), radio communication processing section 206 is left as it is.
Since it is not known which of the analog outputs 1 and 2 is for facsimile transmission, the main control unit 201 controls the analog switch 208 so that only the analog output 1 (224) is connected to the modem unit 212 in step S304. (The switch 420 is turned off). If a modem signal from the partner terminal can be received as a result of the processing,
A process for performing facsimile reception using the B1 channel is performed. If the modem signal cannot be received as a result of the above processing in step S303, the analog output 2 (225) is connected to the analog input (228) to the modem unit 212 (switch 415 is turned off and switch 420 is turned on). Do). If a modem signal from the partner terminal can be received, a process for performing facsimile reception using the B2 channel is performed.

As described above, the selection of the line for facsimile transmission is completed (step S305), and when the main control unit 201 detects that the facsimile modem signal has been received from the B1 channel (step S306), the modem unit 212 Input / output signal 228 to the wireless communication processing unit 20
6 and is separated from the analog input / output 2 (225), and processing for receiving transmission data from the other party's facsimile is started (step S307). At this time, the analog switch 208 turns off the switches 413, 414, 417, and 422. Thereafter, when the incoming call process is performed with the partner terminal 100 using the T30 protocol, the communication speed is matched, and it is determined that communication is possible (step S30).
8) Facsimile communication using B1 channel and B
Communication using voice communication 2B using two channels is performed (step S309).

It goes without saying that the facsimile reception shown in FIG. 8 can be replaced with another data communication using a modem.

As described above, when a modem signal is detected from one of the B channels during a three-way call (step S30)
3) It is possible to automatically shift to data communication (facsimile reception).

That is, according to the present embodiment, the ISDN
When a three-party call is made using the 2B channel of the third party, data transmission and reception using a standard protocol such as the T30 facsimile protocol can be performed with the other party without terminating the three-party call. While making a call, data communication such as facsimile communication can be performed easily and inexpensively with high compatibility by easy operation during the call.

Further, when a document to be transmitted by facsimile is detected, the line selection procedure is automatically started, so that there is an advantage that the operation of the user becomes extremely easy.

When dial information is input by key operation after a line is selected, the selected line is disconnected and data communication is performed using the vacant line. It is possible to easily perform data communication such as facsimile with a party other than the party performing the communication.

Further, since a modem signal for data communication is detected to shift to reception, data communication such as facsimile can be performed without connecting a line again.

[Second Embodiment] In the above embodiment, the facsimile reception is automatically performed. However, the facsimile reception can be performed manually.

In the flowchart shown in FIG. 8, when a call is manually received during a three-party call, the handset 21 is set during the call.
If the user determines that facsimile transmission is to be performed from the partner terminal 100 based on the content of the call heard from 0 (step S303), the user moves the cursor on the display panel 502 using the select key 506 and moves the cursor to the line 1. By setting (step S304), branching to facsimile reception is performed manually.

When the user selects line 1 by pressing set key 507, main control unit 201 recognizes that processing using line 1 is to be performed (step S305).
The key input unit 21 recognizes the facsimile transmission signal from the
3 is pressed, the main control unit 201
A reception process using the 30 protocol is performed using the line 1. At this time, the analog switch 208 is controlled by the switches 413, 414, 417, and 4 when the reception key 505 is pressed.
22 is turned off so that the voice signal of the modem is not output to the handset during facsimile communication.

As described above, the user can visually shift to the data communication (facsimile reception) from the three-party call by visually checking the line display and performing a manual line selection operation. Also in this case, facsimile reception can be replaced by another data communication using a modem.

In the above description, a communication apparatus having a built-in facsimile function and a function of exchanging an extension system by PHS / PIAFS has been described as a configuration of the control station. . That is, the present invention can be implemented as long as the communication device performs a three-party call using the ISDN 2B channel and has a data communication function other than the call. For example, the present invention can also be implemented in a configuration in which an ISDN communication card is mounted on a general-purpose terminal such as a personal computer, and telephone communication and facsimile communication are performed by software control.

The control program of the present invention is stored in the ROM 202
In addition, it can be stored and supplied in any computer-readable recording medium such as a hard disk, a floppy disk, an optical disk, a magneto-optical disk, and a memory card.

[0115]

As described above, a communication apparatus which accommodates a digital public line interface such as ISDN (Integrated Services Digital Network) and has at least one extension telephone function and data communication function, a control method thereof, and In a computer-readable storage medium storing the control program, a first communication control for connecting the B channel at the time of outgoing or incoming call and performing the first communication, and a second communication at the time of connecting the B channel at the time of outgoing or incoming call Performing a second communication control to perform a three-party call using the first and second communication, detecting the presence or absence of data to be transmitted during the three-party call, and performing the first communication and Displaying the line information of the second communication, selecting a line for data transmission based on the information displayed in the display step, Since the data transmission is performed on the line selected by the selection step, when the three-party call is performed using the 2B channel, the T30 and the other party are not terminated without terminating the three-party call. Data transmission and reception can be performed using standard protocols such as facsimile protocol.
There is an excellent effect that data communication such as facsimile communication can be easily and inexpensively performed with high compatibility. In addition, since non-standard protocols and hardware are not used, the present invention can be implemented simply and inexpensively, and three-way communication and data communication can be performed with various other terminals without loss of compatibility.

Further, according to the configuration in which the data communication is facsimile communication using an analog modem signal and the data to be transmitted and received is facsimile image data, a three-party call can be made and the operation can be easily performed during the call. Facsimile communication can be performed easily and inexpensively with high compatibility.

Further, according to the configuration in which the line is selected when a document to be transmitted by facsimile is detected, there is an advantage that the operation of the user becomes extremely easy.

Alternatively, after the line is selected by the line selection, if the dial information is inputted from the key input means for inputting the dial information, the line selected by the line selection is disconnected and the vacant line is used. , Data communication such as facsimile can be easily performed with a party other than the party performing the three-party call, and the operability of the apparatus can be further improved.

Alternatively, a first communication control for connecting the B channel at the time of calling or receiving and performing the first communication and a second communication control for connecting the B channel at the time of calling or receiving and performing the second communication are performed. A three-party call is made using the first and second communications, a modem signal of the first communication and the second communication is detected, and a line for receiving data is selected based on the detection result of the modem signal. Then, if a configuration that receives data from the selected line is adopted,
With easy operation, it is possible to detect the modem signal of data communication during three-party communication and shift to reception with simple, inexpensive and high compatibility, and perform data communication such as facsimile without connecting the line again. There is an excellent effect.

Alternatively, a first communication control for connecting the B channel at the time of calling or receiving and performing the first communication and a second communication control for connecting the B channel at the time of calling or receiving and performing the second communication are performed. A three-party call is made using the first and second communications, line information of the first and second communications is displayed, and a line for data reception is selected based on the displayed information. If a configuration for receiving data from the selected line is adopted, the user can visually recognize the line display during a three-way call and perform a manual line selection operation with simple operation at low cost and high compatibility. Thus, there is an excellent effect that it is possible to manually shift from the three-party call to the data reception.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a communication system employing the present invention.

FIG. 2 is a block diagram showing an internal configuration of a control station in FIG.

FIG. 3 is a block diagram illustrating an internal configuration of a wireless communication processing unit in FIG. 2;

FIG. 4 is a block diagram showing an internal configuration of an analog switch unit shown in FIGS. 2 and 3;

FIG. 5 is an explanatory diagram showing a configuration example of a display unit and a key input / output unit of FIG. 2;

FIG. 6 is a flowchart illustrating a control procedure of a three-party call.

FIG. 7 is a flowchart illustrating a control procedure when facsimile transmission is performed to a partner terminal during a three-party call.

FIG. 8 is a flowchart illustrating a control procedure when facsimile reception is performed during a three-party call.

[Explanation of symbols]

 Reference Signs List 103 Control station 104 Wireless telephone 106 Data terminal or peripheral device 107 Wireless terminal station 201 Main control unit 202 ROM 203 RAM 204 Digital line interface 205 Digital switch unit 206 Wireless communication processing unit 207 RF unit 208 Analog switch unit 209 Sound source unit 210 Handset unit 212 Modem section 213 Key input section 214 Display section 215 Hook detection section 216 Recording section 217 Reading section 218 Document detection section 219 Bus 222 Hold sound 223 Call progress tone 224 Analog input / output 1 225 Analog input / output 2 226 Analog input / output to handset 227 Analog signal to speaker 228 Analog input / output to modem

Claims (19)

[Claims] 1. A communication device which accommodates at least one digital public line interface and has at least one extension telephone function and data communication function, wherein a first communication for connecting a B channel at the time of outgoing or incoming call to perform first communication. Communication control means, a second communication control means for connecting a B-channel at the time of outgoing or incoming call and performing second communication, and a three-party call using the first and second communication control means to perform a three-way call Means, data detection means for detecting the presence or absence of data to be transmitted during the three-way call, display means for displaying line information of the first communication and second communication, and display means for displaying on the display means. Line selection means for selecting a line on which data transmission is to be performed based on the information to be transmitted, and performing data transmission on the line selected by the line selection means. That communication device. 2. The method according to claim 1, wherein the data communication is facsimile communication using an analog modem signal, and the data transmitted and received is facsimile image data.
The communication device according to claim 1. 3. The communication apparatus according to claim 2, wherein said line selecting means is activated when a document to be transmitted by facsimile is detected by document detection means for detecting a document to be transmitted by facsimile. 4. A key input means for inputting dial information, wherein after a line is selected by the line selecting means, when dial information is input from the key input means, the line selected by the line selecting means is selected. 2. The communication device according to claim 1, wherein data communication is performed using the disconnected line. 5. A communication apparatus which accommodates at least one digital public line interface and has at least one extension telephone function and data communication function, wherein a first communication for connecting a B-channel at the time of outgoing or incoming call and performing first communication. Communication control means, a second communication control means for connecting a B-channel at the time of outgoing or incoming call and performing second communication, and a three-party call using the first and second communication control means to perform a three-way call Means, data receiving means for performing data reception during the three-way call, modem signal detecting means for detecting modem signals of the first communication and second communication, and detection result of the modem signal detecting means Line selection means for selecting a line on which data is to be received based on the data, and receiving data from the line selected by the line selection means. Communication device. 6. A switch means for combining / separating analog signals of the first communication and the second communication, and connecting the analog signal combined by the switch means to the modem signal detecting means during the three-party call. First connecting means, second connecting means for connecting only the analog signal of the first communication to the modem signal detecting means, and connecting only the analog signal of the second communication to the modem signal detecting means. A third connection means, wherein when the modem signal is detected by the modem signal detection means during the connection of the first connection means during the three-party call, the second connection means or the third connection means Connect the modem signal detection means to detect the line that received the modem signal,
6. The communication device according to claim 5, wherein data is received from a line that has received a modem signal. 7. A communication device which accommodates at least one digital public line interface and has at least one extension telephone function and data communication function, wherein a first communication for connecting a B channel at the time of outgoing or incoming call and performing first communication. Communication control means, a second communication control means for connecting a B-channel at the time of outgoing or incoming call and performing second communication, and a three-party call using the first and second communication control means to perform a three-way call Means, data receiving means for performing data reception during the three-way call, display means for displaying line information of the first communication and second communication, and information displayed on the display means. A communication apparatus, further comprising: a line selecting unit for selecting a line for performing data reception, wherein data is received from the line selected by the line selecting unit. 8. A control method for a communication device accommodating at least one digital public line interface and having at least one extension telephone function and data communication function, wherein a B channel is connected at the time of outgoing or incoming call to perform first communication. A first communication control step to be performed, a second communication control step of connecting a B channel at the time of transmission or reception and performing a second communication, and performing a three-way call using the first and second communication control steps A three-way call step; a data detection step of detecting the presence or absence of data to be transmitted during the three-way call; a display step of displaying line information of the first communication and the second communication; and the display step A line selection step of selecting a line for data transmission based on the information displayed in step (b), and performing data transmission on the line selected in the line selection step. The communication control method according to claim. 9. The data communication according to claim 8, wherein the data communication is facsimile communication using an analog modem signal, and the data transmitted and received is facsimile image data.
A control method for a communication device according to claim 1. 10. The method according to claim 9, wherein said line selection step is started when a document to be transmitted by facsimile is detected. 11. After a line is selected in the line selecting step, if dial information is input from key input means for inputting dial information, the line selected in the line selecting step is cut off and the vacant line is disconnected. The method for controlling a communication device according to claim 8, wherein data communication is performed using the communication device. 12. A control method for a communication device accommodating at least one digital public line interface and having at least one extension telephone function and data communication function, wherein a B channel is connected at the time of outgoing or incoming call to perform first communication. A first communication control step to be performed, a second communication control step of connecting a B channel at the time of transmission or reception and performing a second communication, and performing a three-way call using the first and second communication control steps A three-way telephone call step; a data receiving step for receiving data during the three-way telephone call; a modem signal detecting step of detecting modem signals of the first communication and the second communication; And a line selection step of selecting a line on which data is to be received based on the result of the detection, and receiving data from the line selected in the line selection step. The communication control method, characterized in that. 13. A control method for a communication device accommodating at least one digital public line interface and having at least one extension telephone function and data communication function, wherein a B channel is connected at the time of outgoing or incoming call to perform the first communication. A first communication control step to be performed, a second communication control step of connecting a B channel at the time of transmission or reception and performing a second communication, and performing a three-way call using the first and second communication control steps A three-way call process; a data receiving process for receiving data during the three-way call; a display process for displaying line information of the first communication and the second communication; and a display process for the display process. A line selecting step of selecting a line for performing data reception based on the information, wherein data is received from the line selected in the line selecting step. Control method of the communication apparatus. 14. A computer-readable storage medium containing at least one digital public line interface and storing a control program of a communication device having at least one extension telephone function and data communication function, comprising: A first communication control step of connecting a channel to perform a first communication; a second communication control step of connecting a B channel at the time of transmission or reception to perform a second communication; and the first and second communication controls A three-party call step of performing a three-party call using a step; a data detection step of detecting the presence or absence of data to be transmitted during the three-party call; and a line information of the first communication and the second communication. A line selecting step of selecting a line for data transmission based on the information displayed in the displaying step; Computer-readable storage medium a control program stored in the communication device, wherein a control procedure stored for data transmission to more selected line. 15. The computer readable storage program according to claim 14, wherein the data communication is facsimile communication using an analog modem signal, and the data to be transmitted and received is facsimile image data. Storage media. 16. A computer-readable storage medium storing a control program for a communication device according to claim 15, wherein a control procedure for activating said line selection step when a document to be transmitted by facsimile is detected. Possible storage medium. 17. When dial information is input from key input means for inputting dial information after a line is selected in the line selecting step, the line selected in the line selecting step is disconnected, and a free line is disconnected. 15. The computer-readable storage medium storing a control program for a communication device according to claim 14, wherein a control procedure for performing data communication using the communication device is stored. 18. A computer-readable storage medium containing at least one digital public line interface and storing a control program for a communication device having at least one extension telephone function and a data communication function, comprising: A first communication control step of connecting a channel to perform a first communication; a second communication control step of connecting a B channel at the time of transmission or reception to perform a second communication; and the first and second communication controls A three-party call process for performing a three-party call using a process, a data reception process for performing data reception during the three-party call, and a modem signal for detecting a modem signal of the first communication and the second communication. A detecting step, and a line selecting step of selecting a line for receiving data based on a detection result of the modem signal detecting step. Computer-readable storage medium a control program stored in the communication device, wherein a control procedure stored for data received from the selected line by degree. 19. A computer-readable storage medium containing at least one digital public line interface and storing a control program of a communication device having at least one extension telephone function and a data communication function, comprising: A first communication control step of connecting a channel to perform a first communication; a second communication control step of connecting a B channel at the time of transmission or reception to perform a second communication; and the first and second communication controls A three-party call process for performing a three-party call using a process; a data reception process for receiving data during the three-party call; and a display process for displaying line information of the first communication and the second communication. And a line selecting step of selecting a line for performing data reception based on the information displayed in the displaying step. Computer-readable storage medium a control program stored in the communication device, wherein a control procedure stored for data reception from the line.