JPH0365064B2 - - Google Patents

Description

[Detailed Description of the Invention] [Summary] In a plurality of exchange networks connected to each other by communication lines, an area code is exchanged based on originating terminal information and terminating terminal information, and this exchanged area code is used to This simplifies the outgoing call restriction process by restricting outgoing calls that span between switching networks.

[Industrial application field]

The present invention relates to connection control between a plurality of switching networks, and in particular to a regulation method for regulating connections between different switching networks based on originating terminal and terminating terminal information.

As seen in public networks, the construction of switching networks formed between carriers, independent of existing switching networks made up of a plurality of exchanges, is becoming popular.

With the increasing use of communication information, it has been proposed that connections between multiple communication terminals, such as telephone exchanges and data exchanges, be performed not only within a single communication network but also via different communication networks (switching networks). .

When making call connections across different switched networks, connections between switched networks are not always possible due to differences in the control formats such as switching network management and connection procedures, as well as differences in fee structures due to the use of communication lines. It will not contribute to the enrichment and sophistication of communication services.

Therefore, in connection between switched networks, call connection is permitted/accepted depending on the conditions of the caller and the called party.
It will also be necessary to impose restrictions on transmissions, such as those that are not permitted.

[Conventional technology]

Conventionally, in a telephone switching network, the following regulation form can be considered as a typical switching process for disallowing calls from a subscriber's telephone.

Calls will be restricted if the service contract between the subscriber and the exchange is violated. For example, calls made by subscribers who have suspended outgoing calls or subscribers who only receive calls are subject to regulation.

When an exchange is overloaded with traffic, such as during times of abnormal congestion, calls are restricted to prevent the entire exchange system from stopping.

On the other hand, it is also being considered to connect a plurality of independent switching networks to each other via communication lines to allow connections between switching networks with different management types.

In connection between such exchange networks, new carriers (new entrants) have emerged who relay calls generated from other carriers to other carriers, and there are areas where competition with other carriers is prohibited. Regarding sending to
There is also a need to regulate outgoing calls to prevent invalid use of lines and to prevent problems with charges for subscribers.

In order to carry out this kind of outgoing call restriction using conventional methods, it is necessary to compare and match the caller's number and the called party's number.

[Problem that the invention seeks to solve]

For calling restriction processing, a method is known in which a switching system determines whether or not the caller is permitted to connect to the called party based on the calling party's number and the called party's number.

This processing based on the caller's number and the called party's number requires a translator (number expansion table) etc. based on the number plan, similar to the conventional long-distance call regulations, etc., and the processing capacity of the switching center. The process of registering or changing regulated areas is quite complex.

The present invention eliminates the need to directly use the caller's number or the called party's number to verify call restrictions.
The purpose is to make it easier to regulate outgoing calls by introducing simple coding and an easily changeable table structure.

[Means for solving problems]

The present invention will be explained below using the principle explanatory diagram of FIG.

Multiple exchanges LS11, LS12, TS11,
Switching network A consisting of IGSa, etc. and multiple switches LS8
1, a switching network B consisting of LS82, TS82, IGSb, etc. and a switching network C consisting of exchanges GS1, GS2, GS3, etc. are interconnected by communication lines.
It is assumed that subscriber terminal X is accommodated in exchange LS11 and subscriber terminal Y is accommodated in exchange LS82.

Furthermore, a subscriber terminal Z can be connected to the exchange C via the exchange GS3 and a private branch exchange PBX. Here, switched networks A and B indicate, for example, public networks, and switched network C indicates a carrier switched network. The exchange indicated by LS is, for example, a public network local exchange or exchange.
TS is a toll exchange, and exchanges IGSa and IGSb are barrier exchanges and exchanges that connect to other carrier's exchange network C.
GS indicates a transit exchange (or equivalent to a barrier exchange in exchange network C) that performs connection relay between exchange networks A and B, respectively.

Here, from subscriber terminal X accommodated in exchange LS11 to subscriber terminal Y accommodated in exchange LS82.
X-LS11-TS11-TS82-LS82-Y between switched networks A and B as public networks.
X-LS11-TS11-IGSa-GS1-GS
Connections such as 2-IGSb-TS82-LS82-Y are also possible.

Here, the present invention provides a call restriction method that is particularly effective when connection is made by relaying the switching network C.

As is well known, enter the subscriber's telephone number, etc. in 4 digits (○○○
○), the local number is 3 digits (XXXX), and the area number is 3 digits (△△△), then the destination number △△
You will need to dial △＋×××＋○○○○ to request a connection. The calling terminal is subscriber terminal
012-345-6789), and the incoming terminal is subscriber terminal Y (number
098-765-4321), when calling terminal After dialing 0 indicating ``0'' and the code 070 assigned to switching network C, the user dials the incoming call number 098-765-4321.

Here, as an exchange connection process,
11, and the gateway switch IGSa-GS1 is connected by the code 070 of switching network C.

On exchange GS1, the area of calling terminal X is 012-345.
It is determined whether switching network C is allowed to connect a call from terminating terminal Y to area 098-765 of area Y, and if it is not allowed or the connection is disadvantageous in terms of service (billing, etc.). In some cases, outgoing calls will be restricted.

The purpose of the present invention is to simplify this regulation process.
Means for generating an area code (for example, 1) of a switching network A, and an area code (eg, 8) for an exchange network B that accommodates the receiving terminal, and indexing a regulation table formed into a matrix using the area code, Call restriction processing is performed by C and means for determining whether or not connection between switching networks C and B is permitted.

Note that the exchange networks A and B may be the same public network, and in the present invention, area codes are assigned separately in order to simplify call restriction processing.

[Effect]

According to the present invention, a minimum digit area code is assigned to each of switching networks A and B independently of the existing number system, and the dial information of the calling terminal and the receiving terminal are once exchanged to this area code to establish a connection. Since a matrix type table or a translator type table is used to determine whether to permit or not, the transmission restriction table etc. has a simple structure, and its search process is also speeded up.

Therefore, the processing speed can be much faster than the conventional method of sequentially developing numbers to determine regulations, the processing speed of the exchange can be increased, and there is no pressure on the call connection processing of the exchange.

〔Example〕

In the principle explanatory diagram of FIG. 1, the switching equipment GS1 was explained as an example of the switching equipment that performs the outgoing call regulation of the present invention.
An example of the configuration of the exchange is shown in FIG. 2, and FIG. 3 is a processing block diagram for calling restriction as an embodiment of the present invention.

In FIG. 2, the exchange includes an exchange switch (NW) 11 that forms a communication path, a control device (CC) 10 that controls the exchange switch 11, a memory (MEM) 12 that stores programs, data, etc., and a communication channel with other exchanges. Trunk (TK) 1 that takes interface
It is equipped with a command input device (TTY) 14 for changing station data, subscriber data, etc., an input/output control device (I/OC) 13, etc.

It should be noted that the configuration of the exchange shown in FIG. 2 is not a special one, but is a generally known configuration, and the present invention is characterized by the call restriction processing therein.

From subscriber terminal X to subscriber terminal Y shown in FIG.
When a call request is made to subscriber terminal X, the local exchange LS accommodating subscriber terminal The number DN (T) is received, and the new entry business identification number 070 and the caller identification number DN are sent to the gateway exchange IGS for inter-network interconnection.
(O) (=012-345-6789), Caller identification number DN
Transfer (T) (=098-765-4321).

The gateway switch IGS analyzes the new entrant business identification number 070 and determines that the call is for a new entrant business.
For the gateway switch (relay switch of switching network C) GS,
Transfer the sender information DN (O) and the called party information DN (T).

At the barrier switch GS, the received information DN (O),
Call restriction processing is performed using DN (T).

FIG. 3 shows a block diagram of this call regulation process, and shows the control device 10 and memory 1 shown in FIG.
It will be controlled by cooperation with 2.

In FIG. 3, one call restriction determination section includes an area code conversion section 2, a call restriction data determination section 3, an area code conversion data storage section 4, a call restriction data storage section 5, a data management section 6, and the like. Caller information
The DN (O) and the called party information DN (T) are input to the area code conversion section 2 of the calling restriction determination section 1 . The area code converter 2 outputs the calling side area code AC(O) and the called side area code AC(T) from the converted data storage unit 4 as converted data E based on the caller information DN(O) and the called party information DN(T). get. This area code AC
(O) and AC(T) are input to the transmission restriction data determination section 3.

The transmission restriction data determination unit 3 obtains restriction data F from the transmission restriction data storage unit 5 using the area codes AC(O) and AC(T), determines whether transmission is permissible or not, and outputs the transmission restriction determination result J. do.

Conversion data storage section 4 and transmission regulation data storage section 5
can be changed by inputting a command at the local station, and when a data change request IN is received from a command input device, etc., it is sent via the data management unit 6 as an area code change request G or a call restriction data change request H, respectively. The area code conversion data or call restriction data is changed.

FIG. 4 shows an example of the table structure of the area code conversion table.

Caller information DN (O) or called party information DN (T)
are the tables DNH, sequentially from the first number, respectively.
Index DN1 and DN2 and find the area code using the change data presence/absence flag PI. When PI is 1, the next linked table DN1,
Index DN2 starting from the second number. When PI is 2, extract the area code stored there.

In this example, for example, if the caller side information DN(O) is indexed as 0, 1, 2, . . ., the area code AC(O)=1 is obtained in the second digit. Also, the called party information DN(T) is indexed as 0, 9, 8, . . . and the area code AC(T)=8 is obtained from the third digit.

For example, if we take Japan as an example, this area code can be divided into 10 area exchange networks with numbers 0 to 9, and if necessary, it can be divided into two digits from 00 to 99.
Although it is possible to use 100 divisions, the choice is determined by the network configuration.

FIG. 5 is a diagram showing the structure of the regulation table in the transmission regulation data storage section, with FIG. 5A showing two types of structure: a matrix type table, and FIG. 5B showing a translator type table.

Caller information DN (O) and recipient information DN in Figure 4
Area code AC (O) obtained based on (T),
AC(T) drives the transmission restriction table ART in FIG. 5A. Indexing is performed in the address direction using the calling side area code, and indexing is performed in the bit direction using the receiving side area code to obtain 1-bit calling restriction data R.

Here, if there are 0 to 9 area codes, this matrix type table will be a 10 x 10 bit map, and for example, R=1 is unacceptable and R=0 is acceptable.

In Figure 5B, the restriction table ARTH is indexed by the caller's area code AC(O), and PI=1
The control data R is extracted by indexing the next table ARO using the area code AC (T) on the called party's side by displaying the continued expansion.

This translator type table is basically the same as the matrix concept, and AC(O) and AC
Data is uniquely obtained using the matrix information of (T).

Figure 6 shows the specific processing flow.
The same number as each block shown in the figure, such as the area code conversion unit 2 and the transmission restriction data determination unit 3, corresponds to its processing.

When the calling party information (number) DN (O) and the called party information (number) DN (T) are entered, the calling party ID
DN (O) is indexed into the conversion table to find the calling area code AC (O) (S1), and the called party number DN is
(T) is indexed into the conversion table to obtain the called party's area code AC(T) (S2).

Next, the obtained area codes AC(O), AC(T)
index the call restriction table using
Determine unacceptable (S3, S4).

If the call is allowed, call connection processing is performed (S5), and if the call is not allowed, a call restriction talk is sent to the caller (S6).

FIG. 7 is a processing flow diagram of the data management section of FIG. 3. The command and data of the station data to be changed inputted from the input/output device etc. are read (S11).

It is determined whether the command is intended to change the area code conversion table or the call restriction table (S12). Next, the data in each corresponding table is changed (S13, S14).

FIG. 8 and FIG. 9 respectively show a regulation processing sequence and a connection sequence in the present invention.

In both FIGS. 8 and 9, the exchanges shown at the top correspond to the exchanges in the switching network explained in FIG.

In FIG. 8, a call is made from a subscriber terminal
This shows that when an attempt is made to receive a call to subscriber terminal Y accommodated in 81, switching network C restricts the connection of this outgoing call. Upon detection of a call (off-hook) from subscriber terminal X, exchange LS11 sends out a dial tone (DT). Designation code 0070 of exchange network C input by subscriber's dial operation
With the incoming subscriber number DN, the exchange LS11 initiates a call to the transit exchange TS11, and after receiving the activation completion,
Communication of control signals, etc. is performed using known MF signal procedures such as KP signal transmission, confirmation signal (ON) reception, 070 code, ST signal transmission, etc. Communication using this MF signal is the same for the barrier exchange IGSa.

Reception end signal (OFF) from barrier switch IGSa
The switch LS11 uses the caller number ID (= DN
(O)) and called party number DN (=DN(T)),
In IGSa-GS1 between barrier exchanges, for example, information for call restriction processing and billing processing is transmitted using a common line.
IAA (=070 code, calling number ID, called number
DN).

As explained above, the exchange GS1 makes a call restriction determination, and if it determines that the connection is not allowed, sends a call restriction talk to the subscriber terminal X side.

Thereafter, the line is disconnected and restored upon detecting that the caller is on-hook.

In Figure 9, as in Figure 8, the switch LS
The call originates from subscriber terminal
Subscriber terminal Y accommodated in the destination exchange LS81
When an attempt is made to receive an incoming call, switching network C indicates that the outgoing call will be allowed to be connected and will be connected.

Connection processing to gateway exchanges IGSa and GS1 is performed by the 8th
It is similar to the figure. When the exchange GS1 determines that the connection is allowed as explained above, it sends information IAA (=070 code, caller ID, incoming call User ID (DN) will be sent sequentially.

When the gateway switch IGSb determines that the call is coming to subscriber terminal Y, it sends the call to each relay switch TS82 and switch LS81.
As incoming call processing, activate the incoming line, receive activation completion signal, send KP signal, receive confirmation signal ON,
Called number DN excluding long-distance number (A~
J) is sent.

In exchange LS81, if subscriber terminal Y is vacant, it sends out a ringing signal tone (RGT) and
A ring tone (RBT) is sent to the originating subscriber, and in response to a response (OFF-HOOK) from subscriber terminal Y, the responses are sequentially returned to the originating exchange (in this example, a common line is used between exchanges IGSb and IGSa). (It is returned as an ANC signal and also serves as a billing start signal).

Next, the call begins, and the on-hook (ON-HOOK) on the caller side sends a signal to support disconnection and performs recovery processing for the next line (in this example, the exchange IGSb-
It is sent back as a CLF signal using a common line between IGSa,
(It also serves as a billing end signal).

〔Effect of the invention〕

As described above, according to the present invention, it is possible to simplify the outgoing call restriction process in connections between different networks, and to prevent pressure on the call processing of the control device CC.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the principle of the present invention, FIG. 2 is a configuration diagram of an exchange, FIG. 3 is a processing block diagram of an embodiment of the present invention, and FIG. 4 is a configuration diagram of a conversion table of an embodiment of the present invention. 5A and 5B are block diagrams of the restriction table according to the embodiment of the present invention, FIG. 6 is a flowchart of the transmission restriction processing of the present invention, and FIG. 7 is a flowchart of the processing of the data management section of the present invention. FIG. 8 is a regulation processing sequence diagram according to the present invention, and FIG. 9 is a connection sequence diagram according to the present invention. LS, TS, IGS, GS: Exchange, A, B, C: Switch network, 1, 8: Area code, X, Y: Terminal, DN
(O): Caller's number, DN (T): Callee's number,
AC(O): Caller side area code, AC(T): Receiver side area code, 1: Calling restriction determination unit, 2: Area code conversion unit, 3: Calling restriction data determination unit, 4: Conversion data storage unit , 5: Transmission restriction data storage section,
6: Data management department.

Claims (1)

[Claims] 1. A plurality of switching networks A connected to each other via communication lines.
-C, code generating means 2 for generating, in the exchange accommodating the communication line, an area code (1) of an exchange network accommodating the originating terminal and an area code (8) of the exchange network accommodating the terminating terminal; A determining means 3 is provided for determining whether connection from one's own network to another network or from another network to one's own network is permissible or unacceptable based on the area code obtained by the code generating means, and calls are restricted between the exchange networks. A transmission regulation method that 2. The code generation means includes area code conversion tables DNH, DN1, and DN2 that exchange the calling terminal information and the receiving terminal information into area codes, respectively, and converts the area code by indexing the area code conversion table. The call restriction method according to claim 1, characterized in that calling is restricted. 3. The call restriction method according to claim 1, wherein the determination means includes a matrixed call restriction table ART, and performs call restriction by indexing the restriction table using the area code. . 4. The switching equipment accommodating the communication line belongs to a switching network C different from switching network A accommodating the calling terminal and switching network B accommodating the terminating terminal, and regulates the origination of calls via the different switching networks. A transmission regulation system according to claim 1, characterized in that: