JPH0490650A - Route regulation selection system by interoffice signal - Google Patents

Abstract

PURPOSE:To prevent the conversation quality from deteriorating due to plural number of connections of lines with low quality by deciding a working route before a front station while inserting a regulation signal to the interoffice signal and regulating the connection to a characteristic route in a self station and in a rear station. CONSTITUTION:When the specified route is used in a front station 2, the transmission is performed by adding the regulation signal displaying that the specified route is used in a regulation signal addition means 60 of the front station 2. In the self station, the propriety of the use of the specified route of the self station and rear station 3 is judged by the received interoffice signal, and the connection regulation is performed when the use is not allowed. Thus, the connection of the line with low quality is regulated in the route selection, and the maintenance of conversation quality is realized.

Description

[Detailed Description of the Invention] [Summary] Regarding the method of regulating connection to a specific route using an inter-office signal, by inserting a regulating signal into the inter-office signal, the route used before the previous station is determined, and the route used by the previous station is determined. The purpose is to provide a route regulation selection method using inter-station signals that can restrict connections to specific routes at subsequent stations. The adding means adds a regulation signal indicating that the specific route has been used and sends out an inter-office signal, and the own station determines whether or not the specific route can be used by the own station and the subsequent station based on the received inter-office signal. The configuration is such that connection is restricted when the device is not in use.

[Industrial application field]

The present invention relates to a method for regulating connection to a specific route using interoffice signals.

In recent years, the scale of communication networks has continued to expand.

Therefore, in order to connect a calling terminal to a called terminal, a plurality of routes are connected to form a communication path.

At this time, for example, if a low-quality line with poor transmission delay, distortion, noise, etc. is connected multiple times, the quality of the call will deteriorate.

FIG. 5 is a diagram illustrating an example of a relay switching system.

The relay switching system shown in the figure consists of switching centers A to G, and switching centers B to C, C to D, and D to E are equipped with terrestrial lines and satellite lines using satellite S. .

Satellite lines are a hindrance, as delays occur due to the round trip of radio waves from the earth station to the satellite.

In this example, when subscriber a of exchange A makes a call to subscriber e of exchange E, if satellite lines are used at exchanges B-C1 and exchanges C-D, then the connection between exchanges D and E is It is necessary to maintain call quality by selecting a terrestrial line instead of a satellite line.

In such route selection, there is a need for a route regulation selection method that can regulate the connection of low-quality lines.

[Conventional technology]

FIG. 16 is a block diagram illustrating a conventional example, and FIG. 7 is a diagram illustrating a conventional routing determination method.

FIG. 6 shows a relay switching device 1A, which includes a central control device 10 that performs connection processing to a subsequent station 3 specified by a dial signal sent from the preceding station 2, a program for performing the connection process, and a memory 20 for storing station data, a network 30 that connects the preceding station 2 and the succeeding station 3, an incoming trunk 40 that controls signals with the preceding station 2, and signals with the succeeding station 3. It is composed of an outgoing trunk 50 that controls.

The routing determination method in the above configuration will be explained with reference to FIG.

(A) shows the connection process when there is no detour route, in which the numbers ABC are sent from the preceding station 2 through the incoming trunk 40 of the relay switching device IA.

This number is received, and the route is determined by referring to the number translation table of the station data in the memory 20.

First, when you index translation table T'1 using the first number A, the address of the next translation table T'2 is indexed, and when you index using the next number B, the address of the next translation table T'3 is indexed.
The address of destination A
Connected to BC.

(B) is the connection process when there is a detour route to destination ABC, and the translation table is indexed in the same way as -(A), but
In this case, a routing number (indicated as RTN in the figure) is registered in the final stage of the last translation table T"3,
By indexing with the routing number, the translation table T"5 is indexed as the final table, and by setting the outgoing trunk 50 in the order of aaa, bbb, and ccc from this table, the priority order of route selection is determined. be able to.

[Problem to be solved by the invention]

In the above-mentioned conventional example, even if it is desired to carry out regulation based on the type of route selected by the preceding station 2 or earlier, the regulation cannot be carried out because the type of route selected by the preceding station 2 or earlier is not known.

For example, if switching center C in FIG. It is not possible to perform route regulation control, such as when allowing access, or when performing similar control at the exchange.

The present invention achieves the following by inserting a regulation signal into the inter-office signal.
The purpose of the present invention is to provide a route regulation selection method using inter-office signals, which can determine the routes used before the previous station and limit connections to a specific route to a number of times of use or less.

[Means to solve the problem]

FIG. 1 shows a block diagram illustrating the invention in detail.

In the block diagram of the principle of the present invention shown in FIG. 1, 1 is a relay switching device, and 10 is a central station that performs connection processing to a subsequent station 3 designated by an inter-office signal sent from a preceding station 2. 20 is a memory for storing programs and station data for connection processing; 30 is a network 30 connecting the preceding station 2 and the succeeding station 3;
0 is the incoming trunk that controls the signal with the previous station 2, and 5
0 is an outgoing trunk 50 that controls signals with the downstream station 3.

Further, 60 is a regulation signal adding means for adding a regulation signal indicating that the specific route is used to the inter-office signal when the specific route is used, and 70 is a regulation signal added to the received inter-office signal. It is a regulation signal detection means that detects a signal and controls the connection of the outgoing route by the outgoing trunk 50. When the preceding station 2 uses a specific route, the regulation signal adding means 60 of the preceding station 2 uses the specific route. A control signal indicating what has been done is added and sent out, and at the own station,
This problem is solved by determining whether or not a specific route can be used by the own station and the downstream station (3) based on the received inter-office signals, and if it cannot be used, restricting the connection.

[For production]

When selecting a route to the succeeding station 3 based on a signal from the preceding station 2, the route to the succeeding station 3 is determined from the inter-office signal received from the preceding station 2.

If the determined route to the downstream station 3 is a normal route, the connection is made to the downstream station 3 as is, and if the determined route to the downstream station 3 is a specific route, the control signal detection means 70
detects the restriction signal in the inter-office signal, determines whether a specific route can be used, connects to the specific route if the specific route is usable, and restricts the connection if the specific route cannot be used. This makes it possible to regulate the number of times a specific route is used among the routes.

〔Example〕

The gist of the present invention will be specifically explained below with reference to embodiments shown in FIGS. 2 to 4.

FIG. 2 is a block diagram explaining the present invention in detail, FIG. 3 is a diagram explaining the routing determination method of the embodiment of the present invention,
FIG. 4 shows diagrams each illustrating a flowchart of an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

The embodiment of the present invention shown in FIG. 2 has the same central control unit 10, memory 20, network 30, incoming trunk 40, outgoing trunk 50, and The regulation signal adding means 60 described in FIG. This example includes a regulation signal detection circuit 71 that detects the presence or absence of a regulation signal, and a regulation signal memory 72 that stores the signal.

FIG. 3 shows the routing determination method. When translation tables T1, T2, and T3 are indexed using numbers XXX, table T4 is finally indexed and the AAA route storm and restriction signal insertion display of the outgoing trunk 50 (hereinafter referred to as I P ; I n5ert
Po5ition) is determined.

In this embodiment, the inter-office signals are as follows, the specific route is a satellite line, and up to two satellite circuits are allowed to be used.

X Explain the operation.

The insertion position of the regulation signal is set in the insertion position counter 61.

Next, when an inter-office signal from the preceding station 2 is received and, for example, 15 is used as a regulation signal, the regulation signal detection circuit 71 determines whether the received signal is 15, and if it is 15, regulation is selected. It is stored in the regulation signal memory 72 as a number.

Since numbers other than 15 are dial signals, index the translation table, select the outgoing route, and select the outgoing trunk (OC in the figure).
(Denoted as T) Determine.

At the time of table indexing, the presence or absence of an IP display is determined, and when there is no IP display, the insertion position counter 61 is updated because no regulation signal is inserted.

When there is an IP display, a regulatory signal is inserted, so
A regulation selection display is set in the regulation signal memory 72.

When the determined exit route is not a specific route, the restriction selection display, restriction selection number, and insertion position counter 61 are cleared, and the received numbers are sent out as they are.

When the exit route is a specific route, the regulation signal memory 72
Determine whether the has a regulation selection number, and if so,
Clear the regulation selection number and send only the numbers.

If there is no regulation selection number, it is determined whether the incoming route is a specific route or not, and if it is a specific route, the specific route has already been used twice, so the incoming route is restricted.

If the entry route is not a specific route, it is determined whether or not there is a regulation selection display, and if there is a regulation selection display, the regulation selection number I5 is inserted into the insertion position indicated by the insertion position counter 61 and the number is sent out.

If there is no restriction selection display, the received numbers are sent as they are.

In this embodiment, in the case of the selected outgoing route or a specific route, if the restriction selection number 15 is added, the specific route can only be used once, so the specific route is allowed to be used, and the selected outgoing route is is a specific route, regulation selection number I
If 5 is not added, the specific route has already been used twice, so the use of the specific route is restricted.

In addition, if a specific route is to be used only once, the regulation selection number 15 is added when the specific route is used, and the subsequent station 3 detects the regulation selection number 15. Since it is possible to determine whether a specific route is already in use, connection to the specific route is restricted, and if it is not in use, connection to the specific route is permitted.

As described above, by inserting the regulation signal into the dial signal between stations, it becomes possible to control the selection of the route to be used at the own station, depending on the type of route used before the previous station.

〔Effect of the invention〕

According to the present invention as described above, when a specific route is used, by inserting a regulation signal indicating that the specific route has been used, it is possible to restrict the number of times a specific route is used to below the usage limit. A route regulation selection method using interoffice signals can be provided.

[Brief explanation of drawings]

FIG. 1 is a block diagram explaining the present invention in detail, FIG. 2 is a block diagram explaining the present invention in detail, FIG. 3 is a diagram explaining the routing determination method of the embodiment of the present invention, and FIG. 5 is a diagram illustrating an example of a relay switching system; FIG. 6 is a block diagram illustrating a conventional example; and FIG. 7 is a diagram illustrating a conventional routing determination method. The diagrams and are shown respectively. In the figure, l and IA are relay switching equipment, IO is a central control unit, 20 is a memory, 30 is a network, 40 is an incoming trunk, 50 is an outgoing trunk, 60 is a regulation signal addition means, 61 is an insertion position counter, and 62 is an outgoing trunk. A regulation signal insertion circuit, 70 a regulation signal detection means, 71 a regulation signal detection circuit, 72 a regulation signal memory, Tl-T3, T'1-T' translation table, T4 a table, respectively. 3. 3 to T' 5 are block diagrams explaining the present invention in detail. FIG. 1 is a block diagram explaining the present invention in detail. FIG. Part 2) Figure 4 (part 1) for explaining a flowchart of an embodiment of the present invention Figure 5 for explaining an example of a relay switching system Figure 5 A block diagram for explaining a conventional example

Claims (3)

[Claims] (1) In the relay switching equipment (1) consisting of a central control unit (10), memory (20), network (30), incoming trunk (40) and outgoing trunk (50), when a specific route is used, the A regulation signal adding means (60) for adding a regulation signal to the signal indicating that a specific route is used; A regulation signal detection means (70) is provided for controlling an outgoing route by the trunk (50), and when the preceding station (2) uses a specific route, the regulation signal adding means (70) of the preceding station (2) is provided. 60), an inter-office signal is sent with a restriction signal indicating that the specific route has been used, and the own station determines whether or not the specific route can be used by the own station and the subsequent station (3) based on the received inter-office signal. judge,
A route regulation selection method using inter-office signals, which is characterized by restricting connections when not in use. (2) When the preceding station (2) uses a specific route, the regulating signal adding means (60) of the preceding station (2)
transmits an inter-office signal with a regulation signal added indicating that a specific route has been used, and the own station selects the outgoing trunk (50) specified by the received inter-office signal, and transmits the selected outgoing trunk (50). When the trunk (50) is a specific route, the regulation signal detection means (70) detects the regulation signal added to the interoffice signal, determines the number of times the specific route is used, and determines whether the number of uses is the specific route. If the number of uses is less than the limit, connect to the specific route and connect to the subsequent station (3
), the restriction signal adding means (60) adds a restriction signal indicating whether or not a specific route can be used and sends it out, and if the number of uses exceeds the limit number of times of use of the specific route, the connection is restricted. The route regulation selection method using interoffice signals according to claim (1). (3) The route regulation selection method using interoffice signals according to claim (1), wherein the specific route is determined using a wireless line.