JPH03266593A - Outgoing connection control system for exchange - Google Patents

Abstract

PURPOSE:To prevent a specific call classification from occupying all line groups to an outgoing path to effectively use lines by using all outgoing lines to the outgoing part for the call originated from its country and preventing the repeated call from another country from using them beyond a registered allowable frequency in use for repeated call. CONSTITUTION:A storage means (trunk call table) 3 where the allowable frequency in use for a prescribed call classification is stored for each trunk group number and a deciding means 4 which decides the call classification of an outgoing connection request call are provided. The call classification of the request call is decided by the means 4 at the time of requesting the outgoing connection; and when it belongs to the prescribed call classification and an allowable frequency (j) in use is set in the storage means 3, outgoing connection is allowed within the range of the allowable frequency (j). When the outgoing connection request call does not belong to the prescribed call classification, outgoing connection is allowed up to a number (i) of all lines of the outgoing path. Thus, repeating is prevented from occupying all line groups to the outgoing path to efficiently use lines.

Description

[Detailed Description of the Invention] Overview Regarding an outgoing connection control system in an exchange, a trunk group number is assigned to each outgoing route with the aim of preventing lines from being occupied by specific call types and making effective use of the lines. and in an exchange that controls outgoing connections by capturing empty trunks based on the trunk group number of the route for which a call requests outgoing connection, means for storing the number of usable lines for a predetermined call type for each trunk group number; means for determining a call type of an outgoing connection request call, and when an outgoing connection request is made, the determining means determines the call type of the call, and the outgoing connection request call is of the predetermined call type, and the storage means stores the call type of the outgoing connection request call. If the number of usable lines is set, outgoing connections are permitted within the range of the number of usable lines, and if the outgoing connection request call is of a call type other than the specified call type, the outgoing connection is allowed. The configuration is configured to allow outgoing connections up to the total number of lines in the route.

Industrial applications The present invention relates to an outgoing connection control system in an exchange.

An international telephone network generally consists of a plurality of direct lines connecting one or more international exchanges installed in each country, and connections with domestic networks (local exchanges) are made through the international exchanges. If all direct lines from the originating country to the destination country are used by other calls or are unavailable due to a failure, a communication path is established between the international exchanges of the originating and terminating countries via appropriate relay countries. It has become so. Therefore,
The outgoing lines of international exchanges are used by outgoing calls from one's own country and relay calls from other countries, but all lines on the relevant outgoing route are occupied only by relay calls, and outgoing calls from one's own country cannot be connected. Since such a situation may occur, there is a demand for an outgoing connection control method for an exchange that can effectively avoid such a situation.

Conventional technology A conventional outgoing connection control system will be explained with reference to FIG.

21 is the international switching system (INTS) installed in country A, 22
is a local exchange (LMS) or a toll exchange (
TS) '23 trunk group to accommodate the line group (
trunk group), 24 is a trunk group for accommodating a line group with country 0, and 25, . . . are a plurality of trunks for accommodating a line group with country B. All trunks 25, . . . for country B are divided into two trunk groups 27.2.
The trunk group 27 is assigned a trunk group number TG, and the line group connected to this trunk group 27 is fixedly used exclusively for outgoing calls from the home country, and the trunk group 28 is assigned a trunk group number TG. The line group connected to this trunk group 28 is fixedly used exclusively for relay calls from other countries, and when an outgoing connection request is made to B1ff, each trunk group number TG, Route selection, connection, etc. are controlled by referring to a data table for call connection such as a trunk group table provided for each 'rcb.

29 is country B's international exchange, 30. ... is a trunk for accommodating a group of lines with country A. 31 is an international exchange in country 0, 32 is a trunk group for accommodating a group of lines with the local exchange or toll trunk exchange 33 in country C, and 34 is a trunk group in A.
A trunk group 35 is for accommodating a line group with country B. A trunk group 35 is a trunk group for accommodating a line group with country B.

However, in AID, for an outgoing call from country A to country B, the international exchange 21 refers to the trunk group table and other tables based on the trunk group number TG assigned to the outgoing call, and makes a corresponding call. By capturing empty trunks from the trunk group 27 that
A call route for country B is set.

On the other hand, in country 0, in response to an outgoing call from country C to country B, the international exchange 31 acquires an empty trunk from the trunk group 35 and sets up a call route. If all of them are in use or cannot be used due to a failure or the like, an empty trunk in the trunk group 34 for country A, which maintains the line with Bffl, is captured and a communication path is secured with country B. In response to this call, country A's international exchange 21
refers to the trunk group table and other data tables based on the trunk group number TGb assigned to the relay call from another country, acquires an empty trunk from the trunk group 28, and sets up a communication path. C
- A communication route to country B is set up via country A.

In this way, in the past, all outgoing lines to country B etc. were divided into two lines, one for outgoing calls (TG) and one for relay calls (TGb), and the lines were set up independently, and the corresponding trunk group was By adopting a method of capturing empty trunks and setting up communication routes, relay calls from country 0, etc. will occupy all lines to country B, etc., making it impossible for outgoing calls from the home country (AID) to connect. This was to prevent this from happening.

Problems to be Solved by the Invention However, in the conventional outgoing connection control system, all lines for the - route are divided into a group of lines dedicated to outgoing calls and a group of lines dedicated to relay calls. In addition to assigning a trunk group number to each line group, a data table for call connection such as a trunk group table is provided for each trunk group number, and outgoing connection control is performed separately. There are problems in that management is complicated and the number of trunk group tables is twice as many as the number of routes.

Additionally, if there are a large number of outgoing connection request calls from the home country (AB:I) and all the lines assigned to calls originating from the home country are in use, there may be vacant lines assigned to relay calls. However, there was a problem in that the line could not be used, and restrictions were placed on outgoing connections from one's own country.

The present invention has been made in view of these points, and aims to prevent a line from being monopolized by a specific call type and to utilize the line effectively.

Eleventh means to solve problems! 1 is an explanatory diagram of the method of the present invention. Components that are the same as those in FIG. 6 are given the same numbers, and some explanations thereof will be omitted.

1 is an international switching system (INTS) installed in country A,
The system of the present invention is applied to this international exchange 1. That is, this international exchange 1 assigns a trunk group number to each trunk group (group) consisting of a plurality of trunks grouped for each outgoing route, and assigns a trunk group number to the route for which the call requests outgoing connection. The TGd captures empty trunks and performs outgoing connection control, and the trunk group table 3 includes the number of relay call usable lines provided for each trunk group number, and the call type of the outgoing connection request call is from the home country. It is provided with means 4 for determining whether it is an outgoing call or a relay call from another country, and means 5 for controlling outgoing connections based on these.

In the figure, 6 is a trunk group for accommodating the domestic line group, 7 is a trunk group for accommodating the line group with country 0, and 8. . . are a plurality of trunks for accommodating one line (1 is an integer of Q<i) to the BIB in the international exchange 1, and these trunks 8. ...by B
Trunk group 2 for IB is configured. Trunk group table 3 is the 2nd TI! This is a data table as shown in J, and this data is the number of lines j that can be used for relay calls.
(j is an integer satisfying 0≦J≦1). Note that this value of j can be arbitrarily rewritten depending on the traffic volume of the corresponding route.

As shown in FIG. 3, the control means 5 performs the following processing based on the determination result of the call type of the call by the determination means 4 (step 301) at the time of an outgoing connection request. Note that the number of empty lines (the number of empty trunks) at the time of executing this process is a (a is an integer of 0≦a≦i), and the number of lines in use by other relay calls is b (b is 0≦b). ≦J integer).

In other words, if the outgoing connection request call is an outgoing call, if a≠0 is true, the outgoing call is allowed (the trunk is captured and a communication path is established), and if it is false, the outgoing call is restricted (the outgoing call is restricted). (step 302).

Furthermore, if the outgoing connection request call is a relay call, a≠0
In this case, if j-b≠0 is true, the relay call is permitted, and if it is false, the relay call is restricted (step 303).

Operation When a call is made from country A to country B, the call type determination means 4 in the international exchange 1 determines whether the outgoing connection request call is an origination call or a relay call. Since this is an outgoing call, the control means 5 is notified of this fact. The control means 5 refers to the trunk group table 3 and other data tables based on the trunk group number (TGd) of the corresponding route, and captures empty trunks from the trunk group 2, so that the A communication path is set up. That is,
All lines (one line) to country B can be used for the outgoing call.

On the other hand, in country 0, for an outgoing call from country C to country B, the international exchange 31 will seize the trunk connected to the direct line group from country C to country B and set up a call path. However, if the relevant line group is all in use or is unavailable due to a failure, the Affiliate that owns the line with country B
Seize the trunk for country B and secure a communication path with country B. In response to this call, in the international exchange 1 of country A, the call type determining means 4 determines whether the outgoing connection request call is an outgoing call or a relay call; in this case, it is a relay call. The control means 5 is notified of this fact.

The control means 5 determines the trunk group number (TG
), the trunk group table 3, etc. is referred to, and the number of lines J used for relay calls in the trunk group table 3 is read, and the number of lines used by other calls (outgoing calls, relay calls) is equal to the total number of lines 1.
If the number of lines used by other relay calls is less than 3, the number of available lines for the relay call is less than 3, the empty trunks in trunk group 2 are captured, and Set up a communication route. In other cases, the establishment of a communication path for this outgoing connection request call is not permitted. That is, for the relay call, a maximum of three lines out of all the lines to the BIB are allowed to be used.

As described above, in the present invention, there is only one trunk group number for one outgoing route, which is TG in FIG.

(denoted by The number of lines j that can be used for relay calls is not allowed to be used, thereby preventing relay calls from occupying all the line groups for the outgoing route.

Example Embodiments of the present invention will be described below based on the drawings.

FIG. 4 is a block diagram showing the configuration of an embodiment of the present invention.

In the figure, 11 is the network unit (NW) of the international exchange, and this international exchange has a control unit (CC) 12 that performs call connection processing and other processes, a call connection program, data tables necessary for call connection, etc. Storage device (MM)
It is equipped with 13. 14. . . . is a large trunk group connected to the domestic line group, 15. ... is the incoming trunk group connected to the circuit group with country 0, 16. . . . is an outgoing trunk group connected to the line group with country B, 17. ... is an outgoing trunk group connected to the line group with country 0.

The trunk group table 3 shown in FIG.
3 is stored as data in the determination means 4 shown in FIG.
The control means 5 is realized by the control device 12 executing a call connection processing program stored in the storage means 13.

The outgoing trunk group 16. ..., exit trunk group 17°・
... are assigned trunk group numbers TGd, TG, and this trunk group number TO.

A trunk group table 3 and other data tables are provided corresponding to the TG.

Hereinafter, the outgoing connection process executed by the control device 12 will be explained as follows.
This will be explained with reference to the flowchart shown in the figure.

First, if it is detected that the large trunk 14 or 15 has been activated (Step 501), and if a dialed number (No. II) is received via the corresponding trunk 14 or 15 (Step 502), translation processing of the dialed number is performed. (calculating the trunk group number TG or TG of the route corresponding to the dialed number, etc.) (step 503). In the following explanation, for convenience, this outgoing connection request call will be explained as a call destined for country B.

Next, in step 504, based on this trunk group number T G a , an outgoing trunk group 16° . Number of empty trunks a of...
Step 505). If there is an empty trunk (a
If ≠0), proceed to step 507, and select the output trunk group 1.
6. If all trunks in ... are in use (a=0
), the process advances to step 518 and ends the call connection process (step 506).

In step 507, it is determined whether the outgoing connection request call is an originating call from the home country or a relay call from another country. The determination is made based on the received information or line class data stored in the storage device 13, and if the outgoing connection request call is an outgoing call, in step 508, an empty one is selected from among the outgoing trunk group 16°... Capture the trunk and proceed to step 515.

If the determination result in step 507 is that the call is a relay call, in step 509 the number j of lines that can be used for relay calls is read out from the trunk group table 3 corresponding to the TG in the storage device 13, and the relay call is used. It is determined whether the number of possible lines j is 0 or other than 0 (step 510). If j=0 in step 510, step 5
The process advances to step 18 to end the call connection process. If j≠0, the number of lines in use for relay calls is read from the counter 18 that counts the number of lines currently used by relay calls in step 511, and it is determined that J-b≠0 (step 512). , if false, the process proceeds to step 518 to end the call connection process, and if true, the process proceeds to step 513 for the outgoing trunk group 16. . . . and in step 514, increments the relay call line number counter 18 by 1.
Proceed to step 515.

Next, in step 515, a call connection to the opposite station (the international exchange of country B) is prepared, and in step 516, an activation signal is sent to the large trunk of the opposite station, and in step 517, dialed digits are sent to the opposite station. Then, the process proceeds to step 518, and the call connection process ends.

As mentioned above, one outgoing route (line group 16.
..., or line group 17 with your home country. ), one trunk group number TG for each.

TG, and this trunk group number TGd.

TG, the trunk group table 3 provided for this number and other data tables are searched based on the TG. Compared to a system that assigns two trunk group numbers for relay calls and controls each separately, the number of trunk group tables etc. is halved and the amount of data can be reduced. An outgoing call from one's home country can use all the lines (i lines) on its outgoing route, and even if the line used for a relay call is vacant, as in the past, an outgoing call can be sent to that line. There is no situation where the line cannot be used, and the line can be used efficiently.

In the above explanation, the types of calls handled are calls originating from one's own country and relay calls from other countries, and the explanation is given on the assumption that the line is prevented from being monopolized by relay calls, but the present invention is limited to this. In some cases, outgoing calls may be prevented from hogging the line. Also,
The call type is not limited to an outgoing call or a relay call, and may be any other call type. Furthermore, the present invention can also be applied to exchanges other than international exchanges.

Effects of the Invention As detailed above, in the present invention, there is one trunk group number for one outgoing route, and calls originating from one's home country are
All outgoing lines for that outgoing route can be used, and on the other hand, for relay calls from other countries, the number of lines that can be used for relay calls cannot be used beyond the pre-registered number j. This eliminates the situation in which a specific call type (relay call from another country) occupies all the line groups for the outgoing route, resulting in the effect that lines can be used more effectively.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the present invention; FIG. 2 is a diagram illustrating an example of a trunk group table in the present invention; FIG. 3 is an explanatory diagram of processing of the present invention; FIG. 4 is a configuration diagram of an embodiment of the present invention; FIG. 5 is a processing flowchart of the embodiment of the present invention, and FIG. 6 is an explanatory diagram of the prior art. DESCRIPTION OF SYMBOLS 1... International exchange, 2... Trunk group, 3... Trunk group table, 4... Judgment means, 5... Control means.

Claims (1)

[Scope of Claims] In an exchange that assigns a trunk group number to each outgoing route and controls outgoing connections by capturing empty trunks based on the trunk group number of the route for which a call requests outgoing connection, the trunk group number storage means (3) for storing the number of usable lines for each predetermined call type; and determination means (4) for determining the call type of an outgoing connection request call; The determining means (4)
determining that the outgoing connection request call is the predetermined call type;
When the number of usable lines (j) is set in the storage means (3), outgoing connections are permitted within the range of the number of usable lines (j), and the outgoing connection request call is An outgoing connection control system for an exchange, characterized in that in the case of a call type other than the call type, outgoing connections are allowed up to the total number of lines (1) on the outgoing route.