JPS60218958A - Repeating device - Google Patents

Abstract

PURPOSE:To prevent a wrong call with ID check function by using a connection control circuit and an electric level conversion circuit to a digital circuit exchange network and attaining the connection of the digital circuit exchange network as a remote circuit. CONSTITUTION:A repeating device 10 first reads the interface prescribing information to a digital circuit exchange network 2 through a set information circuit 10-7 and starts its working based on said information. When a communication device 1 connected to the network 2 is connected to the device 10, terminal devices 5-1-5-n connected to a private branch circuit 4 can receive the transmission data given from the device 1. While the transmission data of the devices 5-1-5-n can be received by the device 1 of the remote side. Then the communication is possible between the device 1 of the remote side connected to the network between the device 1 of the remote side connected to the network 2 and devices 5-1-5-n connected to the circuit 4 via the device 10. The device 1 uses the network 2 as a remote circuit can perform the remote control of devices 5-1-5-n.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a relay device that connects a communication device and a plurality of terminal devices that are connected via different types of communication lines.

(Background technology) Conventionally, in order to control multiple terminal devices connected to a data communication line (hereinafter referred to as the "internal line") within a premises, which is mainly provided exclusively within the premises, from a remote location in a sequential manner, control is performed from a remote location. A relay device is used to connect the remote line and the local line in real time.

An example of a system configuration in which the above relay device is used is shown in Figure 1 (a
) to (c). FIG. 1(a) shows an example in which the relay device 3 is used as a backup device for the communication control device 7. During normal operation, the communication device 1 and the communication control device 7 are connected to each other via a specific communication line 6. Control information is sent to the devices 5-1 to 5-n, and the communication control device 7 controls the terminal devices 5-1 to 5-n according to the above-mentioned control information via the private line 4. .

Further, when the specific communication line 6 becomes unusable due to a failure, the line switching device 8 uses the public telephone network 9 as a backup line and performs similar control.

Furthermore, if the communication control device 7 becomes unusable due to a failure,
The relay device 3 is switched to the relay device 3 side by the line switching device 8, and the communication device 1 only performs electrical level conversion between the public telephone network 9 and the private line 4 and correction of data and timing via the public telephone network 9. The terminal devices 5-1 to 5-n connected to the local area line 4 are remotely controlled from a remote location.

FIG. 1(b) shows an example in which the relay device 3 is used as a normal operation device and a backup device, and during normal operation, the communication device 1 connects the specific communication line 6 and the private line 4 via the specific communication line 6. The terminal devices 5-1 to 5-n connected to the premises line 4 are controlled by the IJ mote from a remote location via the relay device 3 on the normal operation side that only performs electrical level conversion and correction of data and timing. There is. At this time, the line switching device 8 has been switched to the relay device 3 on the normal operation side. In addition, when a failure occurs in the specific communication port @6 or in the relay device 3 on the normal operation side, the multi-communication device 1 in the failure state or the operator switches the line switching device 8 to the relay device 3 on the backup side, as described above. Similarly to the case, the communication device 1 is connected to the private line 4 via the backup side relay device 3 via the public telephone network 9, and the terminal devices 5-1 to 5-5.
-n is controlled remotely from a remote location. At this time,
When an operator or the like switches to the backup side, it is sufficient to make a call from the relay device 3 to the communication device 1.

FIG. 1(c) is an example of the system shown in FIG. 1(b) without a backup device, and the operation is the same as that in FIG. 1(b).

Further, in FIG. 1, in a system that requires a line switching device 8, the line switching device 8 is built into the relay device 3.

FIG. 2 is a block diagram of the conventional relay device 3 shown in FIG. The carrier (CD) detection circuit 3-3 from the line sends the received data from the remote line to the premises line only when the carrier is on, and sends the received data from the premises line to the remote line, and when the carrier is off. 3-4 is a switching circuit that sets the state to no communication state, and 3-4 is a switching circuit 3-3.
The received data from the mode line is sampled according to the timing of the remote line, the timing error with the on-premises line is buffered using FIFO, etc., and the data is sent to the on-premises line at the timing of the on-premises line. Electrical level conversion in the premises - Samples the received data from the premises line that has passed through circuit 3-5 in accordance with the timing of the premises line, and buffers the timing error with the remote line using FIFO etc. A received data identifying and reproducing circuit sends data to a remote line at the timing of the line and corrects data and timing between the remote line and the local line. 3-5 is an electrical level conversion circuit between the local line and the local line.

By adopting the configuration of the relay device as described above, as shown in FIG.
~5-n can be controlled remotely from a remote location, and by using a relay device as a backup device, it can be realized at low cost, and it is also suitable for small-scale on-premise systems with a small number of terminals and a small load. In the world, low-cost relay devices are widely used.

However, with such conventional relay equipment,
It has the following problems.

(a) Control is performed by carrier signals from a remote line, and when controlling a terminal device remotely on a specific communication line, it is always in a point-to-point mode and cannot be in a multi-drop mode, resulting in low communication volume. The system has a problem with line costs.

(b) Since the public telephone network cannot automatically check the ID of the other party when receiving a call, and there is a possibility that an incorrect call may be made when making a manual call, there is a possibility that a connection may be made even if the incorrect call is made. This may cause malfunction.

(c) Poor line quality and low processing capacity.

(d) Because the IJ Mote line uses a specific communication line or public telephone network, the communication speed is low (approximately 1200 b/s on the public telephone network), so the terminal device must control at a high communication speed. However, the processing time will be slow.

(,) If the system configuration shown in Figure 1 (,) is operated at a high communication speed during normal operation, it may be necessary to reconfigure the communication speed setting of the terminal device during backup operation. Furthermore, the processing time becomes slower, which in turn reduces the throughput of the entire system.

(Purpose of the Invention) The purpose of the present invention is to realize a relay device that can connect a digital circuit switching network as a remote line, thereby increasing communication speed and improving line quality, in order to eliminate the above-mentioned drawbacks. This is to prevent erroneous connections caused by erroneous calls and to maintain call and re-call intervals by having an automatic call control function and 10 check function within the relay device. By holding a plurality of pieces of ID setting information, a plurality of communication devices can control a terminal device connected to a private line.

The key point of this invention is that instead of the carrier detection circuit, specific communication line, and electrical level conversion circuit for connection with the public telephone network of the conventional relay device, automatic call control function with digital circuit switching network and disconnection instruction monitoring function are provided. , recovery request control function and I
A connection control circuit that maintains the D-check function and an electrical level conversion circuit with the digital line switching network are installed, allowing the digital line switching network to be connected as a remote line, and the ID
The check function makes it possible to prevent erroneous calls, and the automatic call function maintains the interval between calls and re-calls, thereby preventing inadvertent call operations caused by operators, etc. , a setting information circuit configured with a writable ROM or the like is provided to enable the setting of multiple IDs, and a terminal device (controllable) that is connected to a local line with multiple communication devices.

(Structure and operation of the invention) Hereinafter, the present invention will be described in detail according to embodiments with reference to the drawings.

FIGS. 3(a) to 3(C) are examples of system configurations using the relay device according to the present invention, and are shown in FIGS. 1(a) to 3(C), respectively.
This corresponds to (c). In other words, Figure 3 (,) is the first
Figure 3(a) shows an example of a system configuration in which the public telephone network 9 is replaced with a digital circuit switched network 2 and a relay device 10 according to the present invention is used. FIG. 3(c) is an example of a system configuration in which the conventional relay device 3 connected to the digital circuit switching network 2 and the relay device 10 according to the present invention are respectively replaced.
1(c) is an example of a system configuration in which the specific communication line 6 in FIG. 1(c) is replaced with a digital circuit switching network 2 and a relay device 10 according to the present invention is used. In the system shown in FIG. 3 that requires the line switching device 8, the line switching device 8 is built into the relay device 10.

Since the operation of the relay device 10 according to the present invention in the system configuration examples of FIGS. 3(a), 3(b), and 3(C) is the same, the system configuration example of FIG. 3(c) is A description will be given below using FIG. 4, which is a block diagram of the relay device 10 according to the present invention.

In FIG. 4, 10-1 is an electrical level conversion circuit with the digital circuit switching network 2, which replaces the conventional electrical level conversion circuit with the specific communication line and public telephone network, and 10-6 is
A connection control circuit that has an automatic call control function, a disconnection instruction monitoring function, a recovery request control function, and an ID check function with the digital circuit switching network 2, 10-7 is a plurality of communication IDs.
, a setting information circuit that holds interface regulation information with the Dizotal circuit switching network 2; 10-8 is a man-machine interface circuit that displays the status of the relay device to an omirator, etc., and interfaces with the operation; 10-3; On the other hand, it identifies and reproduces the received data from the digital circuit switching network 2, and sends it to the private line 4 (samples the received data at the timing of the digital circuit switching network 2, and calculates the timing error with the private line 4 using FIFO, etc.). ciphering and transmitting the received data at the timing of the private line 4) or a non-communication state,
On the other hand, the received data from the line is identified and regenerated and sent to the digital line switching network 2 (the received data is sampled at the timing of the local line 4, and the timing error with the digital line switching network 2 is buffered using FIFO etc. a switching circuit that determines whether to transmit the received data at the timing of the digital circuit switching network 2 or to enter a non-communication state;
10-4 is a received data identification and regeneration circuit that identifies and reproduces received data from the digital circuit switching network 2 and sends it to the private line 4; 10-5 is an electrical level conversion circuit for connecting to the local line 4;

The relay device 10 first reads the interface regulation information (direct call, item, notification of the other party, etc.) with the digital circuit switching network 2 through the setting information circuit 10-7, and then starts operating in accordance with that information.

In FIG. 3(c), when the digital circuit switching network 2 and the relay device 10 are in a disconnected state (that is, when the communication device 1 is not controlling the terminal devices 5-1 to 5-n), the situation shown in FIG. Switching circuit 1 by connection control circuit 10-6 of relay device 10
0-3 is set to a no-communication state (for example, a mark, an eyelet, etc.), the no-communication state is sent to the local line 4, data received from the local line is ignored, and the connection control circuit 10-6
It interfaces with a digital circuit switching network 2.

At this time, the connection control circuit 10-6 monitors incoming calls from the digital circuit switching network 2 and calling instructions from the fourth rater and the like. This state is called state 1. At this time, when an incoming call is received from the digital circuit switching network 2,
The connection control circuit 10-6 starts the incoming call operation. The state from the start of the incoming call operation until communication is possible is defined as state 2. During state 20, call instructions from the operator etc. are ignored. During the call control operation, if an abnormal call arrival sequence or network abnormality is detected, the state returns to state 1 again after the disconnection instruction sequence or recovery request sequence is performed. In addition, during the incoming call control operation, if there is notification of the other party according to the interface regulation information with the digital circuit switching network 2, the ID is sent according to the setting information circuit 10-7.
Check the ID received as a result of ■D check.
If it is not the communication device 1 that remotely controls the terminal devices 5-1 to 5-n in FIG. 3(C), a recovery request is automatically sent to the digital circuit switching network 2, and the state returns to state 1 again.

Here, if there are multiple communication devices 1 that remotely control the terminal devices 5-1 to 5-n, the setting information circuit 10-
7, and if the received ID is not one of the set IDs, the process returns to state 1 in the same manner as described above. Also, as a result of the ID check,
If the received ID is a communication device that controls the terminal devices 5-1 to 5-n, the incoming call control operation is performed normally and the communication is enabled. The state during communication is set to state 3.

Alternatively, in state 1, when the Raman machine interface circuit receives a call instruction from a router or the like, the connection control 1 circuit 10-6 reads the ID information of the setting information circuit 10-7, and digitally transmits the information according to the ID. circuit switched network 2
Start calling operation. The state from the start of the calling operation to the time when communication is possible is defined as state 2 as described above. During the call control operation, if an abnormal call sequence or network abnormality is detected, the state returns to state 1 again after the disconnection instruction sequence or recovery request sequence is performed. Further, during the call control operation, if a pinot state (busy) of the digital line switching network 2 or the communication device is detected, the re-calling operation is automatically started after waiting for the re-calling interval. At this time, if the device is still in a busy state even after re-calling twice, it waits for the calling interval and then returns to state 1 again.

Further, during operation in state 2, call instructions from the remote controller etc. are disabled, thereby preventing the fourth router etc. from inadvertently calling the digital circuit switching network 2. Further, although the automatic re-calling operation in response to an abnormal sequence during the above-mentioned call control operation depends on the level of the abnormality, it is possible if the setting information of the setting information circuit 10-7 is set to perform the automatic re-calling operation in the case of an abnormal sequence. be. Here, the terminal devices 5-1 to 5-n
If there are multiple communication devices that remotely control
The communication device number set by the man-machine interface circuit 10-8, the interface conditions set by the setting information circuit 10-7, the communication device setting information, etc. are referred to to ensure that there is no operator error ( For example, if there are two communication devices and the communication device number 3 is specified, an error message will be displayed and the call will not be made), and the call control operation is started for the communication device number mentioned above. When the call origination control operation is successfully completed through the above operations, the state becomes communicable and shifts to state 3. In state 3, a call instruction by an operator or the like is invalid.

When transitioning to state 3, the connection control circuit 10-6 switches the switching circuit 10-3 from the non-communication state to the digital circuit switching network 2.
Then, the data received from the internal line 4 is switched to a state where it is sent to the mutual line, and the data received from the digital line switching network 2 is converted by the electrical level conversion circuit 10-1 and passed through the switching circuit 10-3 for identification and reproduction. The received data is sent to the circuit 10-4, where it is identified and reproduced, and sent to the electrical level conversion circuit 10-5 of the premises line, and after the premises electrical level interface is converted, the received data is sent to the premises line 4. start. Further, the received data from the local line 4 is converted by the electrical level conversion circuit 10-5, and the received data identification and regeneration circuit 1o
-4, identifies and reproduces the received data, and sends it to the switching control circuit 1o-3. At this time, since the received data is valid, the received data is transferred to the electrical level conversion circuit 1.
After electrical level conversion with the digital circuit switching network 2, the received data starts to be transmitted to the digital circuit switching network 2. During this operation data transfer, the communication device 1 and the terminal devices 5-1 to 5-n can perform real-time communication operations, and multiple terminal devices connected to the internal line can be remotely connected to the communication device 1 from a remote location. Can be controlled in many ways. Furthermore, at this time, the relay device 10 monitors disconnection instructions from the digital circuit switching network 2 and restoration requests from the operator etc. by the connection control circuit 1o-6.

As explained above, state 3 is a state in which the communication device 1 can remotely control the terminal devices 5-1 to 5-n connected to the private line 4 using the digital circuit switching network 2 as a remote line. .

At this time, it simultaneously monitors disconnection instructions from the digital circuit switching network 2 and recovery requests from operators, etc., and monitors to return to a non-communication state once the communication operation is completed. At this time, when a disconnection instruction is received from the digital circuit switching network 2 due to the termination of communication between the communication device 1 and the terminal devices 5-1 to 5-n, or when a recovery request instruction is received from an operator, etc. When the request is sent, the connection control circuit 10-6 switches the switching circuit 1O-
3 to a non-communication state, invalidating the data received from the digital circuit switching network 2, and making communication impossible (Tato Eba mark,
The status (idle, etc.) is sent to the data communication line in the premises to invalidate the data received from the premises line 4, and the connection control circuit 10-6 disconnects the shear 622, 9o line switching network. Sakuya Wow.

After this operation, the state returns to state 1 in which incoming calls and outgoing call instructions from the digital circuit switching network 2 are monitored again.

Further, in states 1 to 3, the display function of the man-machine interface circuit can display the status of the relay device, failure information, etc., making it possible for operators and the like to recognize the information.

By performing the above-described operation by the relay device 10, when the communication device 1 connected to the digital circuit switching network 2 and the relay device 10 are in a connected state, the transmission data from the communication device 1 is connected to the private line 4. Terminal devices 5-1 to 5-n
, and the other party's communication device 1 can receive the data sent from the terminal devices 5-1 to 5-n.
By providing the relay device 10, the communication operation with the terminal devices 5-1 to 5-n connected to the terminal devices 5-1 to 5-n is possible. The terminal devices 5-1 to 5-n can be controlled remotely.

FIG. 5 shows a second embodiment of the relay device according to the present invention, in which the relay device 20 is provided with multiple functions so that it can be connected to a public telephone network, a specific communication line, and a digital circuit switching network. Switching circuit 1 as required depending on operation
It is also possible to switch between 0 and 9 and use them.

(Effects of the Invention) As explained above, the present invention provides a connection control means having an automatic call/call control function with a digital circuit switching network, a disconnection instruction monitoring function, a recovery request control function, and an ID check function, and a digital circuit switching network. A setting information means that holds electrical level conversion means for connecting to the network, setting information for multiple IDs, interface regulation information for the digital circuit switching network, etc. is provided, and furthermore, data received from the digital circuit switching network can be identified and reproduced in the same way as in the past. means for transmitting the received data to the local line, identifying and reproducing the received data from the local line, and sending it to the digital circuit switching network; when the communication is not in the communication enabled state, it is in the non-communication state, and when the communication is enabled, the digital circuit switching network The following effects can be obtained by providing switching means for transmitting received data from the local line to each other's lines, and electrical level conversion means with respect to the local line.

(a) A system for remotely controlling a plurality of terminal devices connected to a premises line from a remote location makes it possible to construct a system in which a digital circuit switching network is used as an operating line or a backup line as a remote line.

(b) Compared to conventional systems, it is possible to increase the communication speed and improve the line quality, and as a result, the processing time of the system can be shortened.

(c) During normal operation, relatively high speed (e.g. 9600B/
When operating at a communication speed of 48 KB/S), it is possible to operate at the same speed even when switching to a backup line, and there is an advantage that there is no need to change or change the speed setting of the terminal device.

(d) The ID check function can prevent erroneous calls, and the automatic re-call operation can prevent random calls by operators and the like.

(e) Multiple communication devices can remotely control a terminal device connected to a private line from a remote location.

[Brief explanation of the drawing]

Figures 1 (a) to (c) are system configuration examples using conventional relay devices, Figure 2 is a block diagram of the conventional relay device, and Figures 3 (,) to (c) are relay devices according to the present invention. FIG. 4 is a block diagram of one embodiment of the relay device according to the present invention, and FIG. 5 is a block diagram of another embodiment of the present invention. l...Communication device, 2...Digital circuit switching network, 3
...Relay device, 4...Internal line, 5-1 to 5-n.
... terminal device, 6 ... specific communication line, 7 ... communication control device, 8 ... line switching device, 9 ... public telephone network,
10.20...Relay device, 3-1.3-5.10-1
．． 10-5...Electrical R layer conversion circuit, 3-2...
carrier detection circuit, 3-3.10-3... switching circuit,
3-4゜10-4... Received data identification and regeneration circuit, 10
-6...Connection control circuit, 10-7...Setting information circuit, 10-8...Man-machine interface [Llo-
9...Switching circuit. Patent applicant: Oki Electric Industry Co., Ltd. Patent application agent Yuta I - Figure 1 (a) (b) (C)

Claims (1)

[Claims] A relay device that connects a digital circuit switching network to which at least one communication device is connected and a data communication line to which a plurality of terminal devices are connected, the relay device connecting an electrical level of the digital circuit switching network and a predetermined level. a first converting means for mutually converting; a second converting means for mutually converting the electrical level of the digital communication line and a predetermined level; and a digital line exchange connected to the input of the second converting means. means for identifying and reproducing received data from networks and data communication lines and sending it to the other party; and a switch connected between the means and the first converting means to switch between a communication state and a non-communication state between the lines. configuration information means for holding a plurality of ID information and interface regulation information with a digital circuit switching network;
man-machine interface means for displaying and operating the status of the relay device to the oiler;
IDK of the communication device obtained from the information from the means, the information from the setting information means, and the output of the first conversion means;
The relay device is characterized in that it is configured with means for controlling the switching means by automatically monitoring calls in and out, monitoring disconnection instructions, controlling recovery requests, and checking IDs based on the following.