JPS627296A - Data circuit connecting system - Google Patents

Abstract

PURPOSE:To allow subscriber to recognize connecting state by directly providing subscriber with trunk connections through connecting signal which is sent from analog circuit for inter-stations relaying when the relays are performed inter- stations by a data circuit connecting system using the analog circuit. CONSTITUTION:If data are sent by operating a key board of data terminal 1, a data terminal interface device 2 detects the transmission and informs a central control device 14. In order to execute D/A conversion of data channel of a device 1 coming through a device 2 at a time division switch 3 by a MO DEM 6, the device 14 allows the above data channel to pass through a modem interface trunk 5 and connect with an analog circuit trunk 4 and also allow sound channel of the device 2 to be directly connected in only a direction from a trunk 4. Carrier sound coming from a modem of counter station is detected by the MODEM 6 of its own and are informed the device 14 through the trunk 5. In such a case, calling sound from the counter station as well as carrier sound from the modem are heard through a speaker. Once data exchanges start, the device 14 prevents from outputting by disconnecting the sound channel.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is used as a system for connecting data lines via a public telephone communication network.

According to the present invention, a line from a data terminal interface device is accommodated in an exchange equipped with a time division switch, and this exchange and other exchanges are connected by an analog line, which is commonly used for this time division switch. It relates to a type of data line connection in which modem means are accommodated.

〔overview〕

The present invention is a data transmission system in which the inter-office relay is an analog line.
In the Talo line connection system, the connection signal from the interoffice relay analog line is relayed directly to the subscriber, allowing the subscriber to recognize the connection status.

[Conventional technology]

Conventionally, in a digital automatic switching system, when data is exchanged between offices via analog lines, a modem 6 is used as a common device in the switching system, as shown in FIG. 3, and the modem interface trunk 5 is connected to the switching system. a data terminal device I, a data terminal interface device 2 and a modem 6 are connected via a time division switch 3 and a modem interface trunk 5;
Analog line trunk 4 again through time division switch 3
was connected to exchange data.

In a circuit with such a configuration, when the modem of the opposing station is connected normally, the carrier sound from the modem of the opposing station is detected by the modem 6 of the own station, and the modem interface trunk 5
, the central control unit 14 is notified of this, and data exchange between the data terminal devices becomes possible after a predetermined time. However, if the player does not respond normally, for example, if all the modems that are common to the players are busy, or if the player's data terminal device to which you are trying to connect is busy, the player may Although the busy tone is returned, there is no place for the own station to detect the busy tone, and the modem 6 ends up waiting for the carrier tone from the modem of the opposing station. A predetermined timer value is given to the modem interface trunk 5, and until that value the carrier tone is detected, but when the value is exceeded, a disconnection process is performed.

[Problem that the invention seeks to solve]

However, at this time, the operator of the data terminal device does not know that the game cannot be connected until the timer value has passed, and has to wait. Also, the operator of the data terminal device cannot connect to the data terminal device by entering the wrong number. , even when connected to a regular telephone, the operator will not be able to tell the status of the game, as described above.
You will have to wait until the timeout to disconnect the line. Some operators may perform the cutting operation based on their own judgment, which has the drawback of wasting the operator's operation time.

It is an object of the present invention to solve this drawback and provide a data line connection system in which the reception status of the game can be quickly determined, the troublesomeness of the operator on the calling side is reduced, and the operation time can be shortened.

[Means for solving problems]

In the data exchange method on an analog line of the present invention, a data terminal equipment handles a data channel and a voice channel simultaneously, and signals from the data channel are handled by means for interfacing with the data terminal equipment, and signals from the voice channel are handled by a means such as a speaker. said data and voice channels when data is exchanged using an analog line between a data terminal device connected to said data terminal interface device and a data terminal device of another station; As before, the data channel of the data terminal interface device is connected to the analog line trunk via the modem interface trunk, and the voice channel is connected directly from the same analog line trunk to the data terminal interface device only through a time division switch. It is characterized by being connected.

That is, in the present invention, a data terminal interface device installed at a data subscriber is connected to a time division switch installed at an exchange, and the time division switch and another exchange are connected by an analog line. A modem means is housed in the time division switch, and the time division switch is configured to select and use an empty modem means for a connection call originating from the data terminal interface device and connected to the analog line. In a certain data line connection system, the time division switch, at least immediately after the outgoing connection, transfers the voice frequency band signal arriving at the time division switch from the analog line to the data terminal interface without passing through the modem means. The data terminal interface device includes means for directly connecting to the device, and the data terminal interface device includes means for providing the signal in the audio frequency band coming from the time division switch to the operator as an acoustic signal.

[Effect]

Since the connection response signal from the analog line arrives at the data terminal interface device without going through the modem means, the operator of the data terminal can check the connection status and perform efficient connection operations.

〔Example〕

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

FIG. 1 shows a block diagram of the above embodiment, and FIG. 2 shows a block diagram of the inside of the data terminal interface device 2 shown in FIG.

Here, the feature of the present invention is shown in FIG. 2, in which the data terminal interface device that interfaces the data terminal device 1 and the automatic switchboard is automatically configured to handle two channels, a data channel and a voice channel. The data channel/voice channel multiplexed from the exchange is separated by the channel multiplexing/demultiplexing circuit 12, and the data channel is subjected to speed conversion and information format conversion to match the data terminal equipment in the data terminal interface circuit 9, and the voice channel The decoder 10 converts the PCM signal into an analog signal and the speaker 11 outputs it as sound.

Each of these circuits is controlled by a control circuit 13.

The case where a call is made from the data terminal device 1 connected to the data terminal interface device 2 described above will be explained with reference to FIG.

First, a case where the opponent side responds normally will be explained.

When a call is made by operating the keyboard of the data terminal device 1, the data terminal interface device 2 detects the call and notifies the central controller 14 of the call. Central control device 1
As shown in FIG.
For analog switching, it is connected to analog line trunk 4 via modem interface trunk 5.

Further, the voice channel of the data terminal interface device 2 is directly connected only in the direction from the analog line trunk 4. The carrier sound from the modem of the opposing station is detected by the modem 6 of the own station, and is notified to the central control unit 14 via the modem interface trunk 5. At this time, the ring tone of the game player and the carrier tone from the modem can be heard from the speaker of the data terminal interface device. When the carrier sound is detected, the next data exchange begins, but at this time the central controller 14 either disconnects the audio channel or stops the input from the speaker 11 in the data terminal interface device 2, and then restarts the data exchange. Prevent sound from being output.

If all the modems, which are common devices for the game, are busy, or if the data terminal device to which you are trying to connect is busy, a busy tone will be returned from the game, so the operator can can listen to the game busy sound from the speaker 11 of the data terminal interface device 2,
You can immediately disconnect communication and move on to the next operation at your own discretion.

Furthermore, if you make a mistake when calling a regular telephone, you can hear the other party's voice, so you can determine that you made a mistake.

In this way, the reception status of the other party can be controlled in the same way as a normal telephone, and long waiting times are not required.

〔Effect of the invention〕

As explained above, the present invention enables a data terminal interface device to handle a voice channel, and the data channel has a conventional connection configuration, without having to route the voice channel through a modem interface trunk.
By transmitting and receiving between data terminal interface devices via the same analog line as the direct data channel, and listening to voice-level signals such as the busy tone of a game using the speaker in the data terminal interface device, Since you can quickly find out information about game connections, you can reduce the hassle of operating data terminal devices.
This has the effect of shortening operation time.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is a block diagram of the data terminal interface device in FIG. 1. FIG. 3 is a block diagram of a conventional example. 1... Data terminal device, 2... Data terminal interface device (data terminal IF), 3... Time division switch, 4... Analog line trunk, 5... Modem.
Interface trunk (modem IF) rank), 6
...Modem, 7.Data channel, 8.Voice channel, 9.Data terminal interface device (
data terminal IF), 10...decoder, 11...speaker, 12...channel multiplexing/demultiplexing circuit, 13...
- Control circuit, 14... central control unit (CPU). Block configuration diagram of the embodiment Fig. 1 East Fig. 2

Claims (1)

[Claims] (1) A data terminal interface device installed at a data subscriber is connected to a time division switch installed at an exchange, and this time division switch and another exchange are connected via an analog line. A modem means is housed in the division switch, and the time division switch is configured to select and use an available modem means for a connection call originating from the data terminal interface device and connected to the analog line. In the line connection method, at least immediately after the outgoing connection, the time division switch transfers the voice frequency band signal arriving at the time division switch from the analog line to the data terminal interface device without passing through the modem means. A data line connection system characterized in that the data terminal interface device includes means for providing a signal in the audio frequency band coming from a time division switch to an operator as an acoustic signal. .