JPH09261362A - Data communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten a communication time, to heighten a signal transmission level from a caller side to a callee side and to reduce a communication error by omitting information transmission from a caller to a callee at the time of data communication. SOLUTION: When a calling signal is detected from information of a signal line 6a, a control circuit 24 inputs information of the signal line 8a, detects an inter-calling signal telephone number so as to input information of the signal line 18a to the circuit 24 and judges a presence or an absence mode. At the time of the presence mode, an incoming call from a the destination of the number detected by the line 8a is displayed in a display part 18, calling is executed with the signal line 24e and a timer is set. Then, a keyboard 10 is operated and whole dual communication is executed without calling an operator at the time of during a period. At the time of out of the period, a D.C. loop is formed in the signal line 24a and primary data transmission is executed where communication from the caller to the callee in whole dual communication is abbreviated. At the time of the absence mode, when a file to be transmitted to a destination is stored in a memory circuit 14, the transmission file of it is transmitted.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention is particularly concerned with V.I. 34 relates to a data communication device capable of full-duplex communication.

[0002]

2. Description of the Related Art Conventionally, V.V. 34 In the data communication device capable of full-duplex communication, full-duplex communication was executed regardless of the states of the data communication device on the calling side and the data communication device on the called side.

[0003]

However, V.A. 3
Even when data communication is performed only from the calling side to the called side in V.4, V.4. 34 full-duplex communication, line probing from the called party to the calling party, a long training signal,
There is a drawback that it takes extra time to exchange parameters. Further, in order to ensure full-duplex communication, the transmission signal is set to a level as low as possible, so that there is a drawback that it is difficult to secure communication quality.

The present invention relates to the V. 34 In full-duplex communication,
It is another object of the present invention to provide a data communication device capable of reducing communication time and reducing communication errors.

[0005]

Means for Solving the Problems The first invention of the present application is:
ITU-T Recommendation V. In the data communication device capable of full-duplex communication of No. 34, when there is information to be transmitted to the data communication device on the receiving side when a call is received, V.34. If full-duplex communication is performed and there is no information to be transmitted, V.34 34. Information transmission from the called side to the calling side in 34 full-duplex communication is omitted. In the second invention of the present application, when the information transmission from the called side to the calling side is omitted, a line probing signal, a long training signal, a parameter exchange, and a primary from the called side to the calling side are provided. It is characterized in that transmission of channel data is omitted.

As a result, the V. When data communication is performed only from the calling side to the called side at 34, a line probing signal, a long training signal from the called side to the calling side,
Since it is not necessary to exchange parameters and send primary channel data, communication time can be shortened. Furthermore, since the signal transmission level from the calling side to the called side can be increased, communication errors can be reduced.

The third invention of the present application has a storage means for storing a transmission file corresponding to the telephone number information of the calling side, and a selection means for selecting the absence mode or the home mode. In the home mode, when the incoming call is selected, the fact that there is an incoming call from the destination of the telephone number information of the calling side is displayed, and if the operator answers within a predetermined time, V. 34 When full-duplex communication is performed and the operator does not respond within a predetermined time, V.34. 34. Information transmission from the called party to the calling party in full-duplex communication is omitted, and in the absence mode, if the transmission file is stored corresponding to the telephone number information of the calling party,
V. 34 full-duplex communication is performed, and if the transmission file is not stored corresponding to the telephone number information of the calling side, V.34. 34. Information transmission from the called side to the calling side in 34 full-duplex communication is omitted.

As a result, in the absence mode, the home mode, and further in the absence mode, the V.
34 full-duplex communication, or V.34. 34 Information transmission from the called side to the calling side in 34 full-duplex communication can be omitted, and effective communication becomes possible.

Further, in the fourth invention of the present application, the telephone number of the calling side is detected prior to call connection, and at the time of call connection,
V. 34 full-duplex communication, or V.34. 34 Since it has already decided to omit the information transmission from the called side to the calling side in full-duplex communication, it is possible to immediately shift to communication after the call connection, which is an advantage of saving communication cost. is there.

Further, in the fifth invention of the present application, the telephone number information of the calling side is detected by the telephone number information between the calling signals.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION FIG. 34 is a block diagram showing a configuration of a data communication device capable of full-duplex communication.

An NCU (network control unit) 2 connects to a terminal of the line in order to use the telephone network for data communication and the like,
It controls the connection of the telephone exchange network, switches to data communication, and holds a loop. The signal line 2a is a telephone line, and when the signal of the signal level "1" is output to the signal line 24a, the DC loop is captured, and the signal of the signal level "0" is output to the signal line 24a. , Release the DC loop.

The modulator / demodulator 4 complies with ITU-T Recommendation V.6. 34. Modulation and demodulation based on 34 full duplex, error control, information compression, decompression, etc. are performed, and each transmission mode is designated by the signal line 24f. And the modem 4
Inputs the signal output to the signal line 24b, performs information compression and error control, and outputs the modulated data to the signal line 2b.
And the received signal output to the signal line 2b is input and demodulated to restore the error control information and output to the signal line 4a.

The ringing signal detection circuit 6 is a circuit for detecting a ringing signal, and when the signal output from the signal line 2a is input and the ringing signal is detected, the signal level of "1" is output to the signal line 6a. When the signal is output and the calling signal is not detected, the signal of the signal level "0" is output to the signal line 6a.

The telephone number detecting circuit 8 is a circuit for detecting the telephone number between the calling signals, inputs the signal output to the signal line 2b, and outputs the telephone number information between the calling signals to the signal line 8.
output to a.

The keyboard 10 is composed of various input keys, and the key information pressed is output to the signal line 10a. The display unit 12 is a display unit having a size of 14 inches such as a personal computer, and inputs and displays the information output to the signal line 24c.

The memory circuit 14 stores a transmission information file and the like via the signal line 14a, and the selection button 16 is a call reception mode selection button, and is a button for selecting the absence mode or the home mode. When the button 16 is pressed, a pressing pulse is generated on the signal line 16a.

The incoming mode display circuit 18 has a signal line 24d.
When a clear pulse is generated, the "Absent" mode is displayed, and thereafter, every time a push pulse is generated in the signal line 16a,
The display of "at home" → "absent" → "at home" is repeated. In addition, the incoming call mode display circuit 18 outputs a signal of signal level "0" to the signal line 18a when displaying "absence" mode, and when displaying "home" mode,
A signal of signal level "1" is output to the signal line 18a.

The operator calling circuit 20 has a signal line 24e.
When the signal of the signal level "1" is output to the operator, the operator is called, and when the signal of the signal level "0" is output to the signal line 24e, the operator is not called.

The storage circuit 22 is a circuit that stores whether or not a transmission file is stored in the memory circuit 14 corresponding to a telephone number between calling signals via the signal line 22a.

The control circuit 24 controls the entire data communication apparatus. In particular, in this embodiment, when there is information to be transmitted to the data communication apparatus on the receiving side at the time of an incoming call, transmission of -12 dBm is performed. V. at level If full-duplex communication is performed and there is no information to be transmitted to the called-side data communication device, V.34. 34 In full-duplex communication, control is performed so as to omit the line probing signal, the long training signal, the parameter exchange, and the primary channel data from the called side to the calling side.

More specifically, if the transmission file is stored in the memory circuit 14 in correspondence with the telephone number information of the calling side and the mode selected by the selection button 16 is the home mode. , When the incoming call is selected, the fact that there is an incoming call from the destination of the telephone number information of the calling side is displayed, and if the operator does not respond within a predetermined time, V. 34 Control is performed so as to omit information transmission from the called side to the calling side in full-duplex communication. In addition, the selection button 16
If the mode selected by is the answering mode, if the transmission file is stored corresponding to the telephone number information of the calling side, V. 34 If full-duplex communication is executed and the transmission file is not stored in correspondence with the telephone number information of the calling side,
V. 34 Control is performed so as to omit information transmission from the called side to the calling side in full-duplex communication.

Further, the telephone number information of the calling side is detected prior to the call connection by the telephone number transmitted between the calling signals, and at the time of the call connection, the V.V. 34 full-duplex communication, or
V. 34 It is assumed that it has already been decided to omit the information transmission from the called party to the calling party in the full-duplex communication.

2 to 5 show a control circuit 2 according to this embodiment.
4 is a flowchart showing a control flow of No. 4.

In S32, a signal of signal level "0" is output to the signal line 24a to release the DC loop. Also,
In S34, a clear pulse is generated on the signal line 24d, and the incoming mode display circuit 18 displays "absence mode". Further, in S36, the signal of the signal level "0" is output to the signal line 24e and the operator is not called.

Next, in S38, the information of the signal line 6a is inputted and it is judged whether or not the calling signal is detected. If the calling signal is not detected, the process proceeds to S40 and other personal computer processing is performed. Then, in S42, the information of the signal line 10a is input, and it is determined whether or not the calling is selected. When the calling is selected, the process proceeds to S106, and when the calling is not selected, the S is performed.
Go to 32.

When a calling signal is detected in S38, S
Proceeding to step 44, the information of the signal line 8a is inputted and it is judged whether or not the telephone number between the calling signals is detected.
If not detected, the process proceeds to S48.

In S46, the information of the signal line 18a is inputted, and it is judged whether it is the "at-home mode" or the "absence mode". If it is the "at-home mode", the process proceeds to S50. .

In S48, the information of the signal line 18a is inputted, and it is judged whether it is the "at-home mode" or the "absence mode".

Further, in S50, the fact that there is an incoming call from the destination of the telephone number between the calling signals detected by the signal line 8a is displayed on the display unit 18, and in S52, the signal line 2 is received.
A signal of signal level "1" is output to 4e to call the operator. Further, in S54, the timer is set to 30 seconds.

Next, in S56, the information of the signal line 10a is inputted, it is judged whether or not there is any key operation by the operator,
If there is no key operation by the operator, the process proceeds to S57, and it is determined whether or not the timer has timed out. If the time has expired, the process proceeds to S80, and if the time has not expired, S5 is performed.
Proceed to 6.

When the operator operates a key in S56, the process proceeds to S58, the signal of signal level "0" is output to the signal line 24e, the operator is not called, and the S
In 60, the signal transmission level is set to -12 dBm.

In S62, a signal of signal level "1" is output to the signal line 24a to create a DC loop. next,
S64 is a V. 8 steps are shown. At this point, the V. 34 Notify full-duplex communication.

Then, in S66, line probing is transmitted, in S68, line probing is received, in S70, long training is transmitted, and in S72, long training is received.

Then, in S74, parameter exchange from the calling terminal to the called terminal and parameter exchange from the called terminal to the calling terminal are performed. S76 is a V. 34 full-duplex primary transmission.

Next, in S78, the V. It is determined whether or not the communication in 34 is completed, and if not completed, the process returns to S76 to continue the processing, and if completed, the process returns to the initial state in S32.

In S80, a signal of signal level "0" is output to the signal line 24e and the operator is not called. Then, in S82, a signal transmission level of -8 dBm is set. Furthermore, in S84, the signal of the signal level "1" is output to the signal line 24a to create a DC loop.

Next, in S86, the V. 8 steps are shown. At this point, the calling terminal is instructed to send the V. Notify that the communication from the called side to the calling side of the full-duplex communication 34 is omitted.

Then, in S88, line probing is received, in S90, long training is received, and in S92, parameter conversion from the called side to the calling side is performed. Further, in S94, V. In 34 full-duplex communication, the primary data is transmitted from the called side to the calling side without communication.

In S96, the V. It is determined whether or not the 34 communication has ended, and if it has not ended, the process returns to S94 to continue the process, and when the communication ends, the process returns to the initial state of S32.

Further, in S98, it is judged whether or not the file to be transmitted to the telephone number between the calling signals via the signal line 22a is stored in the memory circuit 14, and if it is not stored, the process proceeds to S80 and is stored. If so, the process proceeds to S100.

In S100, the processes of S58 to S74 are performed. Next, in S102, the V. 34 represents 34 full-duplex primary transmissions. Here, the transmission file stored in the memory circuit 14 is transmitted from the called side to the calling side.

Next, in S104, the V. 34, it is determined whether or not the communication is completed, and if not completed, the process returns to S102 to continue the processing, and when completed, the process returns to the initial state of S32.

In step S106, a signal of signal level "1" is output to the signal line 24a to create a DC loop.
Next, in S108, the V. 8 steps are shown. This V.
In 8 procedures, V. 34 full-duplex communication, or
V. 34, it is determined whether to omit transmission from the called side to the calling side in full-duplex communication. In case of 34 full-duplex communication,
The process proceeds to S112, and the V. If the transmission of the 34 full-duplex communication from the called side to the calling side is omitted, the process proceeds to S128.

In S112, the signal transmission level is set to -12d.
Set to Bm. Then, in S114, line probing is received, in S116, line probing is transmitted, in S118, long training is received, in S120, long training is transmitted, and in S122, the calling side is called. Performs parameter conversion to the calling side and parameter conversion from the called side to the calling side.

Next, in S124, the V. 34 full-duplex primary transmission. Then, in S126, the V.
34 It is determined whether or not the communication is heavy, and if not completed, the process returns to S124 to continue the process, and if completed, S32 is completed.
Return to the initial state of.

In S128, the signal transmission level is set to-
Set to 10 dBm. Then, in S130, line probing is transmitted, in S132, long training is transmitted, and in S134, the parameters of only the called side are exchanged from the called side.

In S136, the V. In 34 full-duplex communication, communication is performed without transmitting primary data from the called side to the calling side. Then, in S138, the V. 34, it is determined whether or not the communication is completed. If not completed, the process returns to S136 to continue the process, and when completed, the process returns to the initial state of S32.

When omitting the information transmission from the called side to the calling side, the contents to be omitted are not limited to those in the above embodiment and can be appropriately selected.

[0050]

As described above, according to the first and second inventions of the present application, V.I. When data communication is performed only from the calling side to the called side at 34, the communication time can be shortened by omitting the information transmission from the called side to the calling side. Since it is possible to increase the signal transmission level from the receiver to the called side, it is possible to reduce communication errors.

Further, according to the third invention of the present application, in the absence mode, at-home mode, and further in the absence mode, the presence or absence of a transmission file exists. 34 full-duplex communication, or
V. The information transmission from the called side to the calling side in the 34 full-duplex communication can be omitted, and effective communication can be achieved.

Further, according to the fourth invention of the present application, it is possible to immediately shift to the communication after the call connection, so that there is an effect that the communication cost can be saved.

Further, according to the fifth invention of the present application, the telephone number of the calling side can be effectively detected before the child connection, and each of the above inventions can be properly implemented.

[Brief description of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the embodiment.

FIG. 3 is a flowchart showing the operation of the above embodiment.

FIG. 4 is a flowchart showing the operation of the embodiment.

FIG. 5 is a flowchart showing the operation of the embodiment.

[Explanation of symbols]

 2 ... NCU, 4 ... Modulator / demodulator, 6 ... Ring signal detection circuit, 8 ... Telephone number detection circuit, 10 ... Keyboard, 12 ... Display section, 14 ... Memory circuit, 16 ... Selection button, 18 ... Incoming mode display circuit, 20 ... operator calling circuit, 22 ... storage circuit, 24 ... control circuit.

Claims (5)

[Claims] 1. An ITU-T Recommendation V. In the data communication device capable of full-duplex communication of No. 34, when there is information to be transmitted to the data communication device on the receiving side at the time of an incoming call, V. If full-duplex communication is performed and there is no information to be transmitted, V.34 34. A data communication device, wherein transmission of information from a called side to a calling side in full-duplex communication is omitted. 2. The line probing signal, the long training signal, the parameter exchange, and the primary channel from the called party to the calling party when the information transmission from the called party to the calling party is omitted in claim 1. A data communication device, characterized in that transmission of data is omitted. 3. The home mode according to claim 1, further comprising storage means for storing a transmission file corresponding to telephone number information of a calling side and selection means for selecting an absence mode or a home mode. When the incoming call is selected, the fact that there is an incoming call from the destination of the telephone number information of the calling side is displayed, and if the operator answers within a predetermined time, V. 34 When full-duplex communication is performed and the operator does not respond within a predetermined time, V.34. 34. Information transmission from the called side to the calling side in full-duplex communication is omitted, and in the absence mode, if the transmission file is stored corresponding to the telephone number information of the calling side, V.V. 34 full-duplex communication is performed, and if the transmission file is not stored corresponding to the telephone number information of the calling side, V.34. 34. A data communication device, wherein transmission of information from a called side to a calling side in full-duplex communication is omitted. 4. The telephone number according to claim 3, wherein the telephone number of the calling side is detected prior to the call connection, and the V. 34 full-duplex communication, or V.34. 34. A data communication device characterized in that it has already been decided to omit information transmission from the called side to the calling side in full-duplex communication. 5. The data communication device according to claim 3, wherein the telephone number information of the calling side is detected by telephone number information between calling signals.