JPH0548495A - Terminal station equipment - Google Patents

Abstract

PURPOSE:To improve the workability in the case of installation by eliminating the difference from the connection in active and standby frames in the terminal station equipment having N:1 redundant configuration. CONSTITUTION:The equipment is provided with a transmission line transmission signal selection section 103 electing a signal sent to a transmission line based on an output of an interface section 101 and an output of a standby system signal selection section 102. The active frame and the standby frame are configured without connection change externally by deciding which of an output of the interface section and a signal of a standby system signal selection section is to be sent to the transmission line based on the setting of the transmission line transmission signal selection section and the workability in installation is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal station device connected to a transmission line having an N: 1 redundant configuration of an N-system active transmission line and a 1-system backup transmission line.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional example. FIG. 3 shows a case of a 2: 1 redundant configuration, which is composed of active racks 304 and 309 and a backup rack 308. In the active rack 304, one of the outputs of the interface unit 301 for inputting the in-station signal is connected to the transmitting unit 303, and the signal is transmitted from the transmitting unit 303 to the active transmission path. Interface unit 30
The other output of 1 is connected to the standby system signal selection unit 302,
A signal to be sent to the standby rack 308 is selected from the output of the interface unit 301 and the signal input from another active rack 309. In the standby rack 308, the standby system signal selection unit 306
Selects a signal to be sent to the backup system transmission line from the output of the interface unit 305 of the standby rack 308 and the signal input from the active rack 304, and is connected to the transmission unit 307.
A signal is sent from 07 to the backup transmission line.

[0003]

In such a conventional example, since the connection destination in the rack to the transmitting unit is different depending on whether it is used on the current rack or used on the spare rack, it is necessary to perform the standing work. However, there is a drawback in that workability is poor because attention must be paid to it and connection changes must be made when changing from the current rack to the spare rack or from the spare rack to the current rack.

The present invention eliminates such drawbacks, and an object of the present invention is to provide a terminal station device having means for eliminating the difference in connection between the active rack and the standby rack.

[0005]

SUMMARY OF THE INVENTION The present invention comprises a plurality of racks connected to an active transmission line and one rack connected to a standby transmission line, and is connected to the active transmission line. Each of the racks selects one of a first interface unit for inputting a signal from the station, a signal passing through the first interface unit, and a signal provided from a rack connected to another working transmission line. The rack connected to the backup system transmission line is provided with a first backup system signal selection unit and a first transmission unit that sends out a given transmission line signal to the working transmission line. A second interface section, and a second standby system signal selecting section for selecting one of the signal passing through the second interface section and the signal selected by one of the first standby system signal selecting sections, Transmission line signal is transmitted to the backup system In the terminal device having a second transmitting section for transmitting to the above, each of the racks connected to the working transmission path is selected by the signal passing through the first interface section and the first standby signal selecting section. A transmission line transmission signal selection unit for selecting one of the selected signals and giving the selected transmission signal to the first transmission unit, and the rack connected to the standby system transmission line passes through the second interface unit. It is characterized by further comprising a second transmission line transmission signal selection unit for selecting either one of the signal and the signal selected by the second standby system signal selection unit and giving it to the second transmission unit.

[0006]

The signal to be transmitted to the transmission line is selected from the output of the interface unit for inputting a signal from the station and the output of the standby system signal selection unit. The output of the interface unit and the standby system are set by setting the transmission line transmission signal selection unit. Since it is possible to determine which of the signal selection units is to be sent to the transmission line, the working rack and the backup rack can be configured without changing the connection outside.
This has the effect of improving workability during construction.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of this embodiment. In this embodiment, as shown in FIG. 1, an in-station signal is input and an interface unit 101 for branching into an active transmission line and a standby transmission line, an output of the interface unit 101 for a standby transmission line and other outputs are provided. A signal to be sent to the backup transmission line is selected from the backup system transmission line signals input from the rack, and the selected signal is sent to the transmission line transmission signal selection unit 103 in the rack and the backup system signal selection unit of another rack. A backup system signal selecting unit 102 for sending, a transmission line sending signal selecting unit 103 for selecting a signal to be sent to a transmission line from the output of the working system transmission line of the interface unit 101 and the output of the standby system signal selecting unit 102, and transmission A transmission unit 104 that generates and transmits a transmission path signal from the output of the path transmission signal selection unit 103 is provided. FIG. 2 shows an example in which a 2: 1 redundant system is configured by using the terminal device of the present invention. Reference numerals 205 and 206 are working racks, and 211 is a spare rack. That is, in this embodiment, as shown in FIG. 2, racks 205 and 206 connected to the active transmission line and racks 2 connected to the standby transmission line are connected.
Each of the frames 205 (206), which is composed of 11 and is connected to the working transmission line, is connected to the interface unit 201 for inputting a signal from within the station, and the signal passing through this interface unit 201 and another working transmission line. Rack 206
The backup system signal selecting section 202 for selecting one of the signals given from (205) and the transmitting section 204 for sending the given transmission path signal to the working transmission path are provided and are connected to the backup system transmission path. The rack 211 includes an interface unit 207 for inputting signals from the inside of the station and the interface unit 2
Backup signal selection unit 208 for selecting one of the signal passing through 07 and the signal selected by the backup system signal selection unit 202, and a transmission unit 210 for sending the given transmission path signal to the protection system transmission path. Further, as a feature of the present invention, each of the frames 205 (206) connected to the active transmission path is selected by the signal passing through the interface unit 201 and the standby system signal selection unit 202. The rack 211, which is provided with the transmission path transmission signal selection unit 203 that selects either one of the signals and gives it to the transmission unit 204, and which is connected to the protection system transmission path, includes a signal passing through the interface unit 207 and a protection system signal selection unit. A transmission line transmission signal selection unit 209 is provided which selects one of the signals selected in 208 and supplies it to the transmission unit 210.

Next, the operation of this embodiment will be described. In the current rack, the transmission path transmission signal selection unit 203 is set to select the output of the interface unit 201,
The intra-station signal input to the interface unit 201 is transmitted to the working transmission path. In the spare rack, the transmission path transmission signal selection unit 209 is set to select the output of the spare system signal selection unit 208, so that the protection system transmission line transmission signal sent from the working rack or the interface of the spare rack. Part 2
Any of the intra-station signals dedicated to the standby system transmission line input to 07 is transmitted to the standby system transmission line.

[0009]

As described above, the present invention provides a transmission line transmission signal selection unit for selecting a signal to be transmitted to the transmission line from the output signal of the interface signal of the intra-station signal and the output signal of the protection system signal selection unit. Since it has, it is only necessary to change the setting of the transmission line output signal selection section when changing from the active rack to the standby rack or from the standby rack to the current rack, and there is no need to change the connection on the outside, improving workability. effective.

[Brief description of drawings]

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

FIG. 2 is a block configuration diagram showing a configuration of a system in which a 2: 1 redundant system is configured by using an embodiment of the present invention.

FIG. 3 is a block configuration diagram showing a configuration of a system in which a 2: 1 redundant system is configured using a conventional example.

[Explanation of symbols]

 101 interface unit 102 backup system signal selection unit 103 transmission line transmission signal selection unit 104 transmission unit 201, 207 interface unit 202, 208 standby system signal selection unit 203, 209 transmission line transmission signal selection unit 204, 210 transmission unit 205, 206 active Rack 211 Spare rack 301, 305 Interface unit 302, 306 Spare system signal selection unit 303, 307 Transmitter 304, 309 Working rack 308 Spare rack

Claims (1)

[Claims] 1. A rack comprising a plurality of racks connected to an active transmission path and one rack connected to a standby transmission path, each rack connected to the active transmission path from within the station. A first interface section for inputting a signal, and a first standby system signal selecting section for selecting either one of a signal passing through the first interface section and a signal given from a rack connected to another working transmission line , A first transmission unit that sends out a given transmission line signal to the working transmission line, and the rack connected to the backup transmission line includes a second interface unit that inputs a signal from within the station, and A second backup system signal selection unit for selecting either one of the signal passing through the interface unit and the signal selected by one of the first backup system signal selection units, and a given transmission path signal for the backup system transmission. Second transmission to send to the road In the terminal device provided with, each of the racks connected to the working transmission path is either a signal passing through the first interface section or a signal selected by the first standby system signal selecting section. The rack connected to the backup system transmission line is provided with a first transmission line transmission signal selection unit that selects one of them and gives it to the first transmission unit. A terminal device, comprising: a second transmission path transmission signal selection unit that selects one of the signals selected by the signal selection unit and supplies the selected second signal to the second transmission unit.