JPH08195806A - Subscriber's line/exchange connection system - Google Patents

Abstract

PURPOSE: To disperse dangers without lowering transmission efficiency and to reduce the number of unusable lines even in the case of changing the exchange of a housing destination. CONSTITUTION: This subscriber's line/exchange connection system is provided with he plural exchanges 12-1 to 12-4, one or more than two line sorting devices 10-1 and 10-2 for sorting plural subscriber's lines to the prescribed exchanges and data signal distributors 11-1 and 11-2 corresponding to respective transmission lines from the line sorting devices for connecting data signals on one transmission line from the respective line sorting devices to more than two prescribed exchanges determined by the position on the transmission line.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber line / switching device connection system for connecting a subscriber line to a switching device so that the risk of transmission / reception failure of transmission data can be dispersed.

[0002]

2. Description of the Related Art In recent years, ISDN lines have become quite widespread, and at subscriber stations, two types of lines, analog lines and ISDN lines, are efficiently accommodated in analog type switching devices and ISDN type switching devices. It is necessary. Therefore, conventionally, a subscriber line / switching device connection system as shown in FIG. 2 has been proposed.

In FIG. 2, one or more remote multiplexers (AR) for multiplexing or demultiplexing analog lines connected to a plurality of analog terminals (not shown).
T) 1 is connected to a subscriber line distribution module (LXM) 2 and multiplexes or demultiplexes analog lines and ISDN lines connected to a plurality of analog type terminals and ISDN type terminals not shown. Also, one or more remote multiplexers (A / I-RT) 3 that are connected are also connected to the subscriber line distribution module 2. The subscriber line distribution module 2 distributes an analog line and an ISDN line, connects the analog line to an analog system switching device (for example, D70) 4, and connects the ISDN line to an ISDN system switching device via a highway interface device (IE) 5. Connect to (ISE) 6.

Here, the highway interface device 5
Is for connecting a high-speed highway with the subscriber line distribution module 2 and a plurality of (for example, 15) low-speed highways with the ISDN switching device 6. Another high-speed highway from the subscriber line distribution module 2 may have a different I via a different highway interface device 5.
It is connected to the SDN switching device 6.

By the way, ISDN lines are often used not only for terminals for voice communication but also for various and important applications, and there is a higher demand for risk dispersion than analog lines.

Conventionally, the ISDN switching device 6 corresponding to the high-speed highway with the subscriber line distribution module 2 is set to 1
Limited to individual and not using half the time slots on the highway, in other words,
By not using about half of a plurality (for example, 15) of low speed highways with the ISDN switching device 6 corresponding to the high speed highway, the danger due to a failure of the ISDN switching device 6 is dispersed, and the ISDN line is It prevented the occurrence of a large amount of data transmission / reception failure.

It has been practiced to connect the highways from the two subscriber line distribution modules 2 to the common ISDN switching device 6 via the two highway interface devices 5.

[0008]

However, limiting the number of timeslots used in a high-speed highway naturally causes a decrease in transmission efficiency.

In addition, the ISDN switching device 6 corresponding to the high speed highway from the subscriber line distribution module 2
Since it is limited to one, when changing the switching equipment to be connected, it is necessary to invalidate the signal of the subscriber line using all the high speed highways corresponding to the switching equipment,
It was impossible to use the highway.

Therefore, there is a demand for a subscriber line / switching device connection system that can disperse risks without lowering the transmission efficiency and reduce the number of lines that cannot be used even when the receiving device is changed.

[0011]

In order to solve such a problem, in the present invention, a subscriber line / switching device connection system is provided with (1) a plurality of switching devices and (2) a plurality of subscriber lines. 1 or 2 or more line distribution devices which are distributed to the switching devices of (3), and (3) Data signals on one transmission line from each line distribution device are distributed to 2 or more predetermined exchange devices which are determined by the position on the transmission line. And a data signal distribution device corresponding to each transmission line from the line distribution device.

Here, it is preferable that the interface circuit portion of the switching device for the data signal of one transmission line from each line distribution device is connected to one or more data signal distribution devices.

Further, when each line distribution device is instructed to perform switching device configuration management means for storing and managing the mounting and connection status of the opposite switching device side, and the distribution destination setting of the subscriber line,
It is preferable that the switching device configuration management means has a switching device connection confirmation means for judging the validity of the instruction on the basis of the mounting and connection status of the opposing switching device side stored and managed.

[0014]

In the subscriber line / switching device connection system of the present invention, the line distributing device distributes a plurality of subscriber lines to a predetermined switching device, and the data signal of one transmission line on the switching device side is specified by two or more. The data signal distribution device corresponding to each transmission line is made to correspond to the exchange device of
A data signal on one transmission line from the line distribution device is distributed to two or more predetermined switching devices determined by the position on the transmission line.

Thus, theoretically, all signal positions on one transmission line on the switching device side extending from the line distribution device can be used for transmission, and the transmission efficiency can be improved. Further, since two or more switching devices are connected to one transmission line, it is possible to realize the risk distribution for the failure of the switching device, and even when the switching device is changed, the signals related to the other switching devices on the one transmission line. The position can be used continuously.

Here, when the interface circuit portion of the switching device for the data signal for one transmission line from each line distribution device is connected to one or more data signal distribution devices, the data signal distribution device In theory, all the transmission lines between the switch and the switching device can be used. From this point as well, the transmission efficiency can be improved, which is preferable.

Further, when each line distribution device is instructed to perform switching device configuration management means for storing and managing the mounting and connection status of the opposite switching device side, and the distribution destination setting of the subscriber line,
Having the switching device connection confirmation means for judging the validity of the instruction on the basis of the mounting and connection status of the opposing switching device side stored and managed by the switching device configuration management means means that the subscriber line as described above is provided. -It is preferable because a switching device connection system can be reliably constructed.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a subscriber line / switching device connection system according to the present invention will be described in detail below with reference to the drawings.
In this embodiment, the ISDN line is connected to the ISDN system switching device.

FIG. 1 is a block diagram showing a connection example of the subscriber line / switching apparatus connection system of this embodiment.

In FIG. 1, each of the line distribution devices 10-1 and 10-2 corresponds to, for example, the above-mentioned subscriber line distribution module and distributes a line to a predetermined switching device. Are connected to the corresponding data signal distribution devices 11-1 and 11-2 via the high speed highway.

Each data signal distribution device 11-1, 11-2
Corresponds to, for example, the above-mentioned highway interface device, and transmits a high-speed highway data signal,
It is to be transferred to one of the low speed highways that is determined by the time slot position of the high speed highway. FIG.
In the case of the connection example, the first data signal distribution device 11-1
Connects a plurality of low speed highways corresponding to the high speed highways in three sets, the first set of low speed highways is connected to the ISDN switching device 12-1, and the second set of low speed highways is the ISDN switching system. Connected to device 12-2,
The third set of low-speed highways is ISDN switching device 12-3.
It is connected to the. In addition, the second data signal distribution device 1
Also in 1-2, a plurality of low speed highways corresponding to the high speed highways are divided into three sets and connected, the first set of low speed highways is connected to the ISDN switching device 12-2, and the second set of low speed highways is connected. The third low speed highway connected to the ISDN switching device 12-3 is an ISDN switching device 1.
2-4 is connected.

As described above, in this embodiment, each I
The SDN system switching device 12-m (m is 1, ..., 4 ...) Is connected to a plurality of data signal distribution devices and is connected to a number of low speed highways corresponding to one high speed highway.
A predetermined number (or a number close thereto) of low speed highways are connected to the interface portion (package or unit) in the N-system switching device 12-m. In other words, a predetermined number of low-speed highways are connected to the interface portion, but the number of high-speed highways corresponding to the low-speed highways (hence, the line distribution device) is two or more.

That is, in this embodiment, as shown in FIG. 3, the high-speed highways HWi-x and HWj-y from the line distribution devices 10-i and 10-j are the data signal distribution device 1.
There is a one-to-one correspondence with 1-ix and 11-jy, but ISDN
The system switching devices 12-m and 12-n do not necessarily correspond one-to-one but one-to-x (x is 1 or more), and the ISDN system switching device 12-
The interface portion for one high speed highway m, 12-n also corresponds to a plurality of high speed highways.

In this respect, the line distribution device 10 of this embodiment
-I differs from the conventional subscriber line allocating module in the configuration and operation of allocating the line to a predetermined switching device. That is, in the conventional subscriber line distribution module, the high-speed highway is 1
The distribution operation is performed as described above because the correspondence is made to the pair 1. In the line distribution device 10-i of this embodiment, the high-speed highway also corresponds to the ISDN system switching device in a one-to-one correspondence. Therefore, the distribution operation is performed in such a manner.

FIG. 4 shows a detailed configuration of the line distribution device 10-i in this embodiment.

In FIG. 4, the line distribution device 10-i is
Data signal path connection device 104 as hardware configuration
And the software control unit 11 as a software configuration
3, the maintenance input / output terminal 114, which is, for example, a workstation, is connected as an external device.

The data signal line connection device 104 is, for example,
It is composed of a T-S-T switch and interface circuits before and after it, and according to the path setting of the software control unit 113, a data signal (on a time slot) is transmitted between the terminal highway and the high speed highway of the data signal distribution device side. Signal), the lines are distributed so that a predetermined subscriber line is connected to a predetermined switching device.

The software control section 113 is composed of a CPU, a main memory (MM), various input / output ports and the like in terms of hardware. The software control unit 113 is expanded in the main memory and divided into functions from the software aspect executed by the CPU, the device control unit 105 and the signal path connection control unit 10 are separated.
6, data signal information storage memory 107, data signal information management unit 108, switching device configuration management unit 109, switching device configuration storage memory 110, data signal connection state management unit 11
1, a connection control execution management unit 112.

The device control unit 105 includes the signal path connection control unit 1
Under the control of 06, the control of the data signal line connection device 104 having a hardware configuration is directly performed.

The signal path connection control unit 106 manages the transmission path position information of the data signal in the data signal path connection device 104. For example, it manages subscriber information, time slot allocation positions on the highway, route information of the data signal line connection device (T-S-T switch) 104, and the like. The data signal information management unit 108 manages signal status information of data signals in the data signal path connection device 104. For example, it manages the call control stage and whether or not data is inserted. The data signal information storage memory 107 stores information managed by the signal path connection control unit 106 and the data signal information management unit 108.

The exchange device configuration management unit 109 manages information on the device configuration state (exchange device mounting information) of a plurality of ISDN exchange devices 12-m and 12-n connected to itself. For example, which one or more switching devices are connected to the x-th high-speed highway HWi-x of the line distribution device 10-i, and which interface circuit package of the switching device is connected, etc. Is to manage. The exchange device configuration storage memory 110 stores exchange device mounting information managed by the exchange device configuration management unit 109.

The data signal connection status management unit 111 manages availability of the position (time slot) of the data signal on the data line (on the highway). The data signal connection status management unit 111 includes the data signal information management unit 10
It manages the availability of the position (time slot) of the data signal on the data line (on the highway) while accessing the information in both storage memories 107 and 110 via the switch 8 and the switching device configuration management unit 109. Connection control execution management unit 11
Reference numeral 2 is for executing and managing connection control of the data line in accordance with a data line connection / change request instruction from the maintenance input / output terminal 114.

FIG. 5 is a flow chart showing the operation of the software control section 113 when there is a connection control request for the data signal path from the maintenance input / output terminal 114. FIG. 6 is a flowchart showing the details of the determination processing (steps 201 and 202) of the availability of the data signal in the data signal.

The operator changes the switching devices 12-m and 12-n connected to the low speed highway corresponding to the high speed highway from the line allocating device 10-i or changes the line allocating device 10-i. The switching device 12-m connected to the low-speed highway corresponding to the above-mentioned high-speed highway is newly set, or the interface circuit package in the switching devices 12-m and 12-n (thus, the connection position of the low-speed highway)
When changing the, after that, the maintenance input / output terminal 1
14 is used to give a connection control request for a data signal path including information defining the connection contents to the line distribution device 10-i so that the line distribution device 10-i can support the connection contents. Let it set.

When the software control unit 113 receives the connection control request for the data signal path from the input / output terminal 114 and starts the process shown in FIG. 5, first, the data signal position (time slot) for connection is used. It is determined whether or not (steps 201 and 202). Such processing is performed as described later with reference to FIG.

Here, if it cannot be used, a series of processing is abnormally terminated. On the other hand, if the data signal position (time slot) for the purpose of connection can be used, the data signal path connection device 104 is instructed to set the data signal path (path). First, it is confirmed whether or not the data signal line connection device 104 has operated (steps 203 and 204).

When the data signal path connection device 104 does not operate as instructed, the series of processes is terminated as an abnormal end as a failure of the data signal path connection device 104. On the other hand, when the data signal path connection device 104 operates normally, the information of the data signal path in the data signal path connection device 104 is stored in the data signal information storage memory 107, and the instruction The transmission line information (excluding the transmission line information about the inside of the data signal line connection device 104) from the terminal to the switching device for the subscriber line relating to the above is also stored in the data signal information storage memory 107, and a series of normal termination is performed. The process of (2) is ended (steps 204 and 205).

Next, the details of the process of determining the availability of the data signal (steps 201 and 202) will be described with reference to FIG.

First, the software control unit 113 extracts from the data signal information storage memory 107 the transmission path information from the terminal for the subscriber line related to this instruction to the switching equipment, and the terminal for the subscriber line to be connected. It is confirmed that the transmission path information from the switch to the switching device is not possessed yet (steps 301 to 303).

When a new transmission line from the terminal to the switching device for the subscriber line to be connected is newly set, the worker must perform some processing before starting the processing shown in FIG. However, in the case of changing and setting the transmission path from the terminal to the switching device for the subscriber line to be connected, the worker must connect the subscriber line to be connected before starting the processing shown in FIG. It is necessary to execute a process of erasing the information of the transmission path from the terminal to the switching device from the data signal information storage memory 107. Although illustration is omitted, when the operator gives an erase instruction, the software control unit 113 erases the instructed transmission path information from the data signal information storage memory 107.

Here, when the instructed transmission path information is held in the data signal information storage memory 107, the instructed data signal position (subscriber line, time slot) is
A series of processing ends with an abnormal end because it cannot be used. On the other hand, if the data signal information storage memory 107 does not have the information about the transmission path from the terminal to the switching device for the subscriber line to be connected, the software control unit 113 causes the data signal information storage memory 107 to store the information. , Information on the connection position of the data signal inside the data signal path connection device 104 is taken out, and it is confirmed that the data signal path (path) related to the connection instruction is not yet set in the data signal path connection device 104 ( Steps 304-30
6). In addition, the confirmation here is performed by the data signal path connection device 1
This is a confirmation on software by information comparison without operating 04.

Here, if the data signal path (path) related to the connection instruction is already set in the data signal path connection device 104, it is determined that the data signal path cannot be used, and the series of processing is terminated abnormally. On the other hand, in software, the data signal path (path) related to the connection instruction is the data signal path connection device 104.
If it is confirmed that it has not been set in
The software control unit 113 uses the data signal path connection device 1
04 is instructed to read the connection status of the data signal path related to the connection instruction, and the data signal path related to the connection instruction has not yet been set in the data signal path connection device 104. This is confirmed by hardware (steps 307 and 308).

Even in this hardware confirmation, the data signal path (path) related to the connection instruction is the data signal path connection device 1.
If it is already set in 04, it is determined that it cannot be used, and the series of processing ends with an abnormal end. On the hardware as well, when it is confirmed that the data signal path (path) related to the connection instruction has not been set in the data signal path connection device 104, the software control unit 113 causes the exchange device configuration storage memory 110 to , Retrieves the information of the switching equipment indicated as being connected to the subscriber line for the connection purpose (and hence the time slot on the highway),
Confirm that the subscriber line for connection (and thus the time slot on the highway) is connected to the switch (steps 309-311).

If the instruction content does not satisfy the connection relationship between the exchange and the high-speed highway, it is determined that the instruction cannot be used, and the series of processing ends abnormally. If the exchange device of the instruction content is an exchange device that can be effectively connected, it is determined whether or not the exchange device is configured to be able to receive the data signal from the subscriber line according to this instruction. At step 309, confirmation is performed based on the information retrieved from the exchange configuration memory 110 (step 312,
313).

If the switching device is not configured to receive the data signal, it is regarded as unusable and the series of processing is terminated abnormally. When the exchange has a device configuration capable of receiving the data signal, the data signal position designated this time (in other words, the subscriber line, the time slot) can be used, and the process proceeds to step 203 described above.

It is to be noted that, as in the conventional case, the switching device (subscriber line distribution module) has a one-to-one correspondence with a switching device having a high-speed highway, and the time slot of the high-speed highway corresponds to that of the switching device. If there is a one-to-one correspondence with the interface circuit package with the predetermined low-speed highway, it is not necessary to perform the processing of step 309 and thereafter. As described with reference to FIG. 1, in the case of this embodiment, the line distribution device (subscriber line distribution module)
Since the high-speed highway from the switch and the interface circuit package of the exchange can be set in an arbitrary relationship, whether or not the instruction content satisfies the configuration of the exchange when setting the data signal path of the subscriber line. It is necessary to confirm.

Therefore, according to the above-described embodiment, as shown in FIG. 1, it is possible to physically allow a plurality of switching devices related to the transmission line (high-speed highway) from the line distribution device, and different. Allows low-speed highways related to high-speed highways from the line distribution device to be connected to the same switching device, and allows the line distribution device to retain such configuration information on the switching device side. Since the validity of the setting is confirmed and the setting is performed by taking into consideration the information on the configuration of the exchange apparatus thus made, the following effects can be obtained.

The high-speed highway from the line distribution device can be used 100% if necessary, and the transmission efficiency can be improved as compared with the conventional case. Moreover, from the viewpoint of one switching device, the usage rate on a certain high-speed highway is about the same as the conventional one, and the risk distribution to the switching device can be achieved to the same extent as the conventional one.

Further, since a plurality of exchanges can be connected to one high-speed highway, even when the exchanges connected are changed, only the data signal position (time slot) transmitted to the exchange to be changed is invalid. The high-speed highway can be continuously used even at the time of this change.

Although the above embodiment has shown the subscriber line / switching device connection system in consideration of the ISDN line, the present invention can be applied to the subscriber line / switching device connection system for analog lines.

In the above embodiment, the subscriber line distribution module for distributing the ISDN line and the analog line to the switching device is intended as the line distribution device, but only one type of line is targeted. It may be a line distribution device.

Further, in FIG. 1, the one high-speed highway data signal is distributed to three low-speed highways, but the number of distribution groups is not limited to this, and it is sufficient if the number is two or more. .

[0053]

As described above, according to the subscriber line / switching device connection system of the present invention, a plurality of switching devices and one or more line distributions for allocating the plurality of subscriber lines to a predetermined switching device are provided. It corresponds to each transmission line from the above-mentioned line distribution device, in which the data signal on one transmission line from each distribution device and each line distribution device is connected to two or more predetermined switching devices determined by the position on the transmission line. Since the data signal distribution device is provided, the risk can be distributed without lowering the transmission efficiency, and the number of unusable lines can be reduced even when the exchange device of the accommodation destination is changed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a subscriber line / switching device connection system of an embodiment.

FIG. 2 is a block diagram showing a conventional subscriber line / switching device connection system.

FIG. 3 is an explanatory diagram showing details of a connection between a line distribution device and a switching device according to an embodiment.

FIG. 4 is a block diagram showing a detailed configuration of a line distribution device according to an embodiment.

FIG. 5 is a flowchart showing the operation of the software control unit when a connection control request for a data signal path is made in the embodiment.

FIG. 6 is a flowchart showing details of a process of determining availability of a data signal in FIG.

[Explanation of symbols]

10-1, 10-2 ... Line distribution device, 11-1, 11-
2 ... Each data signal distribution device, 12-1, 12-2, 12
-3, 12-4 ... ISDN switching device, 104 ... Data signal line connection device, 105 ... Device control unit, 106 ... Signal line connection control unit, 107 ... Data signal information storage memory, 10
8 ... Data signal information management unit, 109 ... Switching device configuration management unit, 110 ... Switching device configuration storage memory, 111 ... Data signal connection state management unit, 112 ... Connection control execution management unit, 1
13 ... Software control unit, 114 ... Maintenance input / output terminal.

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical indication location H04Q 3/42 104 3/52 101 A 9566-5G 11/04 (72) Inventor Akira Ishizawa Toranomon, Tokyo Minato-ku 1-7-12 Oki Electric Industry Co., Ltd. (72) Inventor Kimihide Jinno 1-1-6 Uchiyuki-cho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corporation (72) Inventor Kenji Misu 1 1-6 Nihon Telegraph and Telephone Corp. (72) Inventor Yoshio Sato 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corp.

Claims (3)

[Claims] 1. A plurality of switching devices, one or more line distribution devices for distributing a plurality of subscriber lines to a predetermined switching device, and a data signal on one transmission line from each of the line distribution devices,
A subscriber line / switching device connection, comprising: a data signal distribution device corresponding to each transmission line from the line distributing device, which is connected to two or more predetermined switching devices determined by the position on the transmission line. system. 2. The interface circuit portion of the switching device for data signals for one transmission line from each of the line distribution devices is connected to one or more data signal distribution devices. The subscriber line / switching device connection system according to claim 1. 3. The switching device configuration management means for storing and managing the mounting and connection status of the switching devices facing each other in each of the line distribution devices, and when the distribution destination setting of the subscriber line is instructed,
3. An exchange device connection confirmation means for judging the validity of an instruction based on the mounting and connection status of the opposite exchange device side stored and managed by the exchange device configuration management means. The subscriber line / switching device connection system described in.