JPH0787407B2 - Transceiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention monitors the connection status of a duplicated transmission line such as an active standby system, and an N: 1 switching system having a spare for an active N. It is suitable for use in monitoring the connection status of the transmission lines that make up the network, monitoring the connection configuration of the links between the switches of the cross-connect device or switch, and so on.

The present invention relates to a transmission / reception device that connects devices by a connection line and transmits and receives a signal via the connection line, to two or a plurality of connection lines connecting the transmission / reception devices.
On the transmitting side, a corresponding identification number is assigned to each connection line, and on the receiving side, a means for detecting and recognizing the identification number in the signal received via the connection line is provided, so that This facilitates monitoring of the connection status.

[Conventional technology]

A transmission / reception device that connects between devices with two or more communication connection lines and transmits and receives signals via the connection lines, as a specific example, has a 0 system / 1 system as a connection line For transceivers, transceivers that use multiple connection lines as current or standby, transceivers that connect to exchanges, etc. There is no means for recognizing the receiving side of which device the signal passing through the line is originally received, and the normality of the connection of the connecting line depends on the confirmation of the operator.

[Problems to be Solved by the Invention]

In such a conventional method, since there is no means for electrically recognizing that the connection between each device is normally performed between the transmitting and receiving devices, the receiving side originally receives the signal due to the incorrect connection of the connection line. In some cases, the desired signal was not received and the signal did not pass. Also, in a transmitter / receiver having a switching system such as 0 system / 1 system or N: 1, normal switching may not be performed because the transmitting side and the receiving side, which should not be originally connected, are connected due to an incorrect connection line. there were. In addition, there is a case where a signal does not pass due to switching to a system in which the connection line connecting the transmission side and the reception side of the standby system is not normally connected.

The present invention assigns an identification number in a signal passing through a connection line connecting devices and detects it in the reception side, and recognizes whether the identification number is a predetermined identification number. It is intended to prevent erroneous connection that causes disconnection and the like.

The present invention is directed to a transmitter / receiver having a duplicated transmission line such as 0 system / 1 system, which is caused by a failure caused by the 0 system and 0 system and the 1 system and 1 system not being properly connected. N: 1 to prevent and also have one spare for the working N
In a transmission / reception device having a switching system, a failure in which normal switching is not performed is prevented because a transmission side and a reception side, which should not be originally connected, are connected due to an incorrect connection of a connection line. Further, since the connection line connecting the transmitting side and the receiving side of the standby system is not normally connected, it is possible to prevent a failure such as a signal not passing through the switching. Also,
In the cross-connect device and the exchange, the links between the switches of each device are uniquely determined, and by applying the present invention, it is possible to confirm the normality of the connection in a plurality of the links, and to check the connection status of those connections. By facilitating the monitoring, the failure caused by the incorrect connection of the connecting line is prevented.

[Means for Solving the Problems]

The present invention relates to a transmission / reception device that connects devices with a plurality of connection lines and transmits and receives signals via the connection lines, and in the connection line, an unused portion on the frame format of the main signal is provided on the transmission side. It is characterized in that a unique identification number is given to the connection line, and the receiving side detects and recognizes the identification number given on the main signal. Furthermore, if the expected identification number is not received, it is notified. Further, when the expected identification number is received, it can be notified.

The present invention is applied to a transmitter / receiver having a redundant transmission line and an active backup switching means, and a unique identification number is
It is sufficient if it is unique in the system in which misconnection can occur.

[Action]

A unique identification number is transmitted from the transmitter side to each of the plurality of connection lines. The receiving device can detect and recognize the identification number, and can automatically confirm whether or not the connection of the connected connection line is normally performed regardless of the operation of the operator.

〔Example〕

FIG. 1 shows a block diagram of an embodiment of a transmitting circuit provided in the transmitting / receiving apparatus of the present invention. Similarly, FIG. 2 shows a block diagram of the receiving circuit.

The transmission circuit 11 shown in FIG. 1 has a reception circuit 21 via a connecting line.
An insertion circuit 12 for inserting a specified identification number is provided in an unused portion of the frame format of the signal transmitted to. In addition, the receiving circuit 21, the detection circuit 22 for detecting the identification number on the frame format of the signal received via the connection line, the identification number detected by the detection circuit 22, and the reception scheduled in advance. The comparison circuit 23 compares the identification numbers to be compared and notifies the determination result.

FIG. 3 shows a transceiver apparatus according to an embodiment of the present invention, which is represented by a transceiver apparatus including the transmitter circuit and the receiver circuit. In this embodiment, the transmitting and receiving devices T ₁ and T ₂ which send the same signal from the transmitting side to the two connecting lines and select one of the connecting lines on the receiving side are respectively connected to the transmitting and receiving devices T ₁ . ₁ ,
It is composed of _two connecting lines L ₁ and L ₂ connecting between T ₂ . In the transmitter circuit of the transmitter / receiver T ₁ , the connection line L ₁ and the connection line L ₂
The same signal is sent to each of them, and a different identification number is inserted into an unused portion of the signal to be transmitted to the connection line L ₁ and the connection line L ₂ by the insertion circuit provided in the transmission circuit. In the receiving circuit, the detecting circuit 22 provided in the receiving circuit detects the identification number of the connecting line provided in the signal passing through each of the connecting line L ₁ and the connecting line L ₂ , and is provided in the receiving circuit. The comparison circuit 23 compares the predetermined identification number and notifies the determination result.

FIG. 4 shows an example of a transmitter / receiver having an N: 1 switching system as an embodiment of the transmitter / receiver including the transmitter circuit and the receiver circuit. In this embodiment, transmitting / receiving devices T ₁ and T ₂ that perform transmission and reception via a plurality of connecting lines between the transmitting / receiving devices, and
It is composed of _n connecting lines L _{1 to} L _n connecting between the transmitting / receiving devices T ₁ and T ₂ . In the transmission / reception device in which the connection relationship of the connection lines connecting the transmission / reception devices is uniquely determined in this way, the transmission device of the transmission / reception device T ₁ does not use the signals to be transmitted to the connection lines L _{1 to} L _n , respectively. A different identification number is transmitted to each of the connecting lines, including the connecting line in the standby state, from the inserting circuit provided in the transmitting circuit. On the receiving side, the detection number provided in the receiving circuit detects the identification number of the connecting line given in the signal passing through each of the connecting lines L ₁ to L _n, and the detecting circuit is provided in the receiving circuit. The comparison circuit compares the predetermined identification number and notifies the determination result.

Examples of the transmitting / receiving device including the transmitting circuit and the receiving circuit include a digital cross-connect device and an exchange. As an example thereof, FIG. 5 shows a connection form of connection lines connecting between digital cross-connect devices according to the present invention. A block diagram of the embodiment is shown in FIG.

A connection form of the connection line shown in FIG. 5 and a time division type cross-connect device having a time switch as a transmitting / receiving device and a space division type cross-connect device having a space switch in the embodiment shown in FIG. The connection form of the connection lines shown in FIG. 5 enables connection of paths between arbitrary time division type cross-connect devices and realizes a large-scale complete line group. It shows that the transmitting circuit in the position is connected via a connecting line to a designated receiving circuit of the system closed to one space switch of the space division type cross-connect device. In the embodiment shown in FIG. 6, one time division type cross connect device and a space division type cross connect device for enabling arbitrary path setting between the time division type cross connect devices and time division type cross connect device. Connection line that connects the connection device and the space division type cross-connection device
L _ab0 , _ab1 (a <i, b <n: a, b, i, n are integers, and the last 0, 1 indicates a system).

In this embodiment, the relationship between the transmission circuit and the reception circuit of the time division type cross connect device and the space division type cross connect device connected by a plurality of connecting lines is uniquely determined. In the time division type cross connect device and the space division type cross connect device, the same signal is transmitted,
It is assumed that each functional unit to be received has a 0/1 system configuration. In the transmitter / receiver circuits at both ends of a plurality of connecting lines that connect the time division type cross connect device and the space division type cross connect device, in the transmission circuit, the specified identification number α _ab0 is specified by the insertion circuit provided in the transmission circuit. , _Ab1 (a <
i, b <n: a, b, i, n are integers, and the last 0, 1 indicates the system), and their identification numbers α _ab0 , _ab1 (a <
i, b <n: a, b, i, n are integers, and the last 0, 1 indicates the system.) In the receiving circuit, the detection circuit detects the identification number in the received signal. , The identification number α specified in the comparison circuit provided in the receiving circuit
_ab0 , _ab1 (a <i, b <n: a, b, i, n are integers, and the last 0, 1 indicates a system). As a result, it is recognized whether or not the identification number should be originally received, and it is determined whether or not the connection is incorrect.

The determination result is that if the identification numbers match, for example, the blue light emitting diode is turned on, and if the identification numbers do not match, for example, the yellow light emitting diode is turned on,
Notify the operator of the connection status of the connection line. Due to this, the signal that should be originally received is not received by the receiving side due to the incorrect connection of the connection line, so the signal does not pass, and in the part with the 0/1 system configuration, it is not originally connected due to the incorrect connection of the connection line Since the supposed sender and receiver are connected,
Failures such as normal switching not being performed, signals being cut off due to switching being performed to a system in which the connection line that connects the transmitting side and the receiving side of the standby system is not normally connected Can be prevented.

〔The invention's effect〕

As described above, according to the present invention, it is possible to easily monitor whether the connection form of the two or more connecting lines connecting the transmitting and receiving devices is normal or abnormal. As a result, it is possible to prevent erroneous connection that causes a failure such as signal interruption or abnormal switching.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of a transmission circuit provided in the present invention. FIG. 2 is a block diagram of an embodiment of a receiving circuit provided in the present invention. FIG. 3 is a block diagram of an embodiment of a transmitter / receiver having a 0 system / 1 system configuration in the present invention. FIG. 4 is a block diagram of an embodiment of a transmission / reception device having an N: 1 switching system configuration in the present invention. FIG. 5 is a diagram for explaining that the connection relationship of the connection lines connecting the time division type cross connect device and the space division type cross connect device is uniquely determined. FIG. 6 is a block diagram of an embodiment when the present invention is applied to a cross connect device. 11 …… Transmission circuit, 12 …… Insertion circuit, 21 …… Reception circuit, 22
...... Detection circuit, 23 …… Comparison circuit, 31,32 …… Reception circuit,
33,34 …… Transmission circuit, 35〜38 …… Conversion circuit, 39 …… Selection circuit, 40〜42 …… Time switch, 51,52 …… Transmission circuit,
53,54 …… Reception circuit, 55,56 …… Space switch.

Claims (2)

[Claims] 1. A transmission / reception device in which a transmission device and a reception device are connected by a plurality of connection lines, and signals are transmitted and received through the connection lines, wherein the transmission device transmits to the connection line. Means for giving a unique identification number to the connection line, respectively, to the signal, the receiving device, the means for detecting the identification number from the signal received from the connection line, and the identification number detected by this means And a means for recognizing that it is an identification number to be originally received, the transmitting device includes a means for transmitting the same signal to two connection lines of the plurality of connection lines, and A transmission / reception device comprising means for selecting and receiving a signal of one of the two connection lines. 2. The transmission / reception device according to claim 1, wherein the number of the connection lines is large, and the connection lines are fixedly connected between the transmission device and the reception device for a considerably long period of time.