JPS63256092A - External line call connection control system - Google Patents

Abstract

PURPOSE:To simplify an external line call route automatic selection system and to attain its general-purpose application by applying connection control by a main processing unit (MPU) only before and after a trunk line outgoing route selection by a sub-processing unit (SPU). CONSTITUTION:An MM2 setting extension connection control information is provided to an MPU 1 and an SM 4 setting code editing information to select an external call route automatically is provided respectively to an SPU 3. A PPU 1 uses the information of the MM 2 to all external line call routes based on the dial information in case of the external line call to apply connection control and identify all the allowable external line call routes, then the dial information and the said call route information are sent to the SPU 3. The SPU 3 selects the route with the highest priority in the said routes, extracts the edit dial information required therefor from the SM 4 and returns it to the MPU 1 and the PPU 1 uses the said information to edit again into the opposite subscriber number required for being bypassed through the calling route and the connection control is applied again.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a connection regulation method for making outside calls in a telephone exchange device such as an electronic private branch exchange or an electronic button telephone device. The present invention relates to a connection regulation method for making outside line calls by automatically selecting the outside line call route in a telephone exchange equipped with a function of automatically selecting one of the routes when making a call.

[Background of the invention and prior art]

In recent years, Japan has established a system of multiple telephone communication service providers (hereinafter referred to as telephone companies), similar to the United States and other countries.In this system, it is difficult to decide which telephone company's line to use. , for example, communication type (e.g., regular telephone,
type of data communication, facsimile communication, etc.), sending destination,
The caller can choose according to his or her will, taking into consideration the relationship between the call time and communication cost. Furthermore, it is also possible to select a method in which the call route to the destination of the call is not limited to the lines of one telephone company, but via the lines of a plurality of telephone companies.

In addition, if there is a dedicated line for a specific subscriber, there are multiple calling routes for that specific subscriber, including a calling route via the telephone company's general subscriber line and a calling route via the above-mentioned dedicated line. A route exists.

Under the system described above, the selection of the route for making an outside line is basically done by the caller's dial operation.
It is usually quite difficult for the caller to select the optimal call route based on the above-mentioned communication type, call comfort, call time, etc., and the number of digits in the dial number increases, making dialing complicated. (sometimes when the calling route spans the lines of multiple telephone companies), telephone switching equipment performs dialing operations for outgoing calls from internal lines in the same format (for example, when dialing an outside line from an extension line, control is performed to automatically edit the dialing code resulting from the dialing operation of the extension into a dialing code that selects the above-mentioned optimal calling route within the telephone exchange (using the dialing number for making an outside line). automatic route selection function).

In addition, in telephone exchange equipment, there are usually six call restriction classes for each extension (a class that completely prohibits outgoing calls, a class that only allows local calls, a class that prohibits calls to outside lines, a class that allows only local calls, and local calls, and A class that allows long-distance calls only for those who have a phone number, a class that allows all long-distance calls except for local calls and calls to foreign countries, a class that allows all outside calls including calls to foreign countries, etc.) The government regulates outgoing calls.

By the way, in the telephone exchange device equipped with the automatic outside line call route selection function, in addition to the above-mentioned normal call restriction based on class, call restrictions for the call route selected by the automatic outside line call route selection (for example, to a specific destination, There is also a regulation that allows calls from one extension to be made using any call route, but prohibits calls from other extensions other than a specific call route.This regulation is usually based on the above class. This will be carried out on the premise that transmission regulations will be in place.

When a telephone exchange equipment is provided with the automatic outside line call route selection function, the common control unit is usually equipped with a central processing unit (hereinafter referred to as the main central processing unit) for performing general exchange connection processing, as well as a central processing unit. A central processing unit (this
It is called a sub-central processing unit. ), but conventionally, connection restriction class information for outgoing calls to extensions is set in the memory of both the main central processing unit and the sub central processing unit, and the main central processing unit and sub central processing unit The outside line outgoing connection restriction check was performed independently based on the connection restriction class information set for each.

[Problem that the invention seeks to solve]

According to the conventional method described above, it is necessary to perform a connection restriction check for outgoing calls in both the main central processing unit and the sub central processing unit, and therefore both central processing units must be provided with connection restriction class information for outside line outgoing calls. Requires storage memory. In addition, since the sub-central processing unit requires connection restriction class information for each external line origination route to the extension line, the sub-central processing unit should be made versatile (i.e., with different control methods or operating conditions, etc.). In order to be able to be used in common with a wide variety of telephone exchange equipment, the assembly of the connection restriction class information to be set for the sub-central processing unit is also complicated. The benefits of generalization will be halved. Further, there are other problems such as the difficulty in easily changing the connection regulations during operation of the telephone exchange device.

The present invention is proposed to solve the above problems.

[Means and effects for solving the problems] In order to solve the above problems, the present invention provides a main memory for setting extension line connection restriction class information in the main central processing unit, and an external line originating route in the sub central processing unit. Each sub-memory is provided to set code editing information for selecting the
When making an external call from the extension, the main central processing unit performs a connection restriction check using the connection restriction class information of the extension for all of the multiple external call calling routes based on the area code or city code dialed from the extension. After identifying all the allowable external calling routes for outgoing calls from the above extension, it activates a sub-central processing unit that performs automatic route selection, and processes the area code or local code dialed from the extension. The sub-central processing unit sends the dial information necessary for selecting the central office line origination route and the identified external line origination route information, and the sub-central processing unit selects the highest priority among the received allowable external line origination routes based on the received dial information. Select a higher route, extract the necessary edit dialing information from the above code edit information and send it back to the above main central processing unit, and the main central processing unit uses the above edited dial information to process the party dialed from the extension. When re-editing the subscriber number to the subscriber number required to route the outside call via the selected external line call route, and adding the necessary code to the subscriber number (including area numbers, etc.) that was incorrectly dialed. In some cases, unnecessary codes are deleted from the dialed subscriber number (including area numbers, etc.). )1 Based on this, connection restrictions are re-enforced.

[Embodiments of the invention]

1 and 2 are drawings for explaining the present invention in detail.
The figure is a block diagram, and FIG. 2 is a flowchart showing connection regulation processing in automatic outside line origination route selection control.

Hereinafter, the configuration of a practical example of the present invention will be explained with reference to FIG.
The operation of the embodiment shown in FIG. 1 will be explained according to the processing flow shown in FIG. Koo processing unit 1
A main memory (MM) stores the processing program and processing data of , and sets connection restriction class information corresponding to the route for making an outside call from extension 9, and 3 is a sub-central processing that controls automatic route selection when making an outside call from extension 9. unit) (S
PU), 4 is a sub memo that stores the processing program and processing data of the sub central processing unit 3, and also sets various data such as code editing information for automatic route selection! j (SM)% s and 6 are input/output capos for connecting the main central processing unit 1 and the sub central processing unit 3 via a bus) (MPIO).

5 PIO), 7 and 8 are pass lines of the main central processing unit 1 and the sub central processing unit 3, respectively.

Each of the above sections constitutes a common control section.

t, 91JI (SUB), 10 is line circuit (LS)
, 11 is a speech path switch (SPSW), and 12 to 14 are external line trunks (COTA-COTc) provided in external line originating routes (AC).

In addition, lj! 9 and line circuit 10 are shown to represent a plurality of circuits, and outside line trunks 12 to 14 are shown to represent a plurality of circuits in each route A to C.

As shown in FIG. 1, a main central processing unit 1 and its attached main memory 2, and a sub-central processing unit 3 and its attached sub-memory 4 are connected to each other via input/output ports 5 and 6 via pass lines. 7 and 8 are mutually path-coupled. In addition, each route A-C for extension 9 and outside line
The line circuit 10 and the outside line trunks 12 to 14 are selectively coupled by being connected by the line switch 11, and the line circuit 10, the line switch 11, and the outside line trunk 12 ~14 are controlled from the main central processing unit 1, and the line circuit 1
0 and the outside line trunks 12 to 14 are also sent and received with the main central processing unit 1.

When the extension 9 makes an outside line call by automatically selecting an outside line call route, the main central processing unit 1 sends the extension 9 a call using a known method.
The line circuit 10 transmits the dialing information necessary for automatic selection of an outside call route, such as the area code or local code dialed from the line circuit 10.
When the call is received via the main memory 2, a connection restriction check is performed on all external line outgoing routes based on the connection restriction class of the outgoing extension set in advance in the main memory 2, and external outgoing calls are permitted for the outgoing extension. Identify all outbound call routes. Subsequently, for all of the identified permissible external line origination routes (for example, routes A and B), the main central processing unit 1 identifies whether the external line trunks 12 and 13 are free or busy, and determines whether any of the free routes among routes A and B are available. Check for presence. In the above connection restriction check, outgoing extension 9
is not allowed to make a call to any of the routes A to C, and when there is no empty trunk on the allowed outside line originating routes (e.g. routes A and H) during the free route check, the main central processing Unit 1 performs busy connection control using a known method, connects extension 9, and connects line circuit 1.
A signal tone, such as a busy tone, that conveys the calling town is sent out via the telephone number 0.

On the other hand, as a result of the above-mentioned connection restriction check and empty route check, if allowable outside line origination routes A and B having empty trunks are identified, the main central processing unit 1 activates the sub central processing unit 3 using a known method (not shown). and all outside calling routes with empty trunks identified above via path line 7, input/output ports 5 and 6, path line 8) A, H numbers and the area code or city received from extension 9. Dial information such as the internal number necessary for selecting an outside call route is sent to the sub-central processing unit 3. The sub central processing unit 3 sends an outside line with a blank call sent from the main central processing unit 1 based on various data preset in the sub memory 4 and dial information sent from the main central processing unit 1. Select the highest priority outgoing call route from routes A and B and the type of call carried by that route (types that are distinguished by which telephone company's line is used, etc.), and make the necessary edit dials. The information is extracted from the code editing information set in the sub-memory 4 and sent back to the main 7 central processing unit 1 via the bus line 8, the input/output ports 5 and 6, and the pass line 7.

Based on the edited dial information sent back from the sub-central processing unit 3, the main central processing unit 1 converts the subscriber number (dial information) received from the extension 9 into the selected external line origination route and call type. After editing the corresponding subscriber number, the highest priority external line returned from the sub-central processing unit 3 according to the edited subscriber number and the connection restriction class of the extension set in the main memory 2. The connection restriction check is performed again on the outgoing call route, for example, the route person, and the relevant external line outgoing route A is
When it is confirmed using the above-mentioned selected call type that outgoing call is permitted, empty trunk selection for the outgoing outgoing call route A is then performed. Here, if there is an empty trunk among the outside line trunks 12 corresponding to route A, the main central processing unit 1 establishes an outside line origination connection using a known method. Also,
If the outside line call is not allowed in the above-mentioned connection regulation check again, or if there is no empty trunk even if the outside line call is allowed, a busy connection is made in the same known manner as described above and a busy tone etc. is returned to the extension 9.

In the above control, the connection restriction check (second connection restriction check) after editing the dial information for the highest priority outside line calling route in the main central processing unit 1 is performed for the following reasons. is necessary. In other words, in cases where there are multiple routes for calling the subscriber, such as a route via telephone company A's target, a route via telephone company B's line, and a route via a private box, If the route allowed for the extension is a route via telephone company B's line or a route via a leased line, the first connection restriction check will be performed because the routes are within the conditions. Then, calls to the subscriber on the calling party using the calling extension are permitted, but if among the calling routes, only the route via telephone company A's line is available,
This is because outgoing calls from the local extension line must be prohibited.

In addition, after the final connection regulation check is carried out, there is a check for availability of the outside line calling route (second availability check).
When I first checked availability, the available external route was 2.
This is necessary because the line may become busy due to an incoming call, etc., during the time before the second connection restriction check, but for example, if the above external line route is an outgoing-only route, or if the line was selected at the time of the first availability check. If the outside line route is controlled to be blocked, the second availability check is not necessary. However, in this embodiment, in order to avoid unnecessarily blocking an external line originating route for which external line origination is not allowed for the originating extension, the vacancy check for the external line originating route is performed twice in addition to the three points described above. I try to go around.

〔Effect of the invention〕

As is clear from the above explanation, the present invention replaces connection restrictions in central office line outgoing calls by automatic route selection from extension lines. According to the present invention, since the connection restriction check is not performed in the sub-central processing unit that performs automatic route selection, the connection restriction class of the extension is (in other words, in the sub-memory), this simplifies the automatic route selection system for outside line calls, which consists of a sub-central processing unit and sub-memory that perform automatic route selection, and also controls the telephone exchange equipment. Differences in connection regulation conditions due to differences in the system or operating conditions δ do not affect the system data of the sub-central processing unit, so the system for automatically selecting an outside call route can be generalized (in other words, the sub-central processing unit part can be used as an optional component). It is possible to easily achieve this remarkable effect.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the invention, and FIG. 2 is a flowchart showing the operation of the embodiment of the invention. 1... Main central processing unit 2... Main memory 3... Sub central processing unit 4... Sub memory. Agent Teruo Taniyama Pa. -8″ 啼j：D Niibe Yoji”

Claims (1)

[Claims] When making a call from an extension to an outside line, a telephone exchange device has a function of automatically selecting an outside line call route with the highest priority from among a plurality of available outside line call routes based on dial information from the extension line, In addition to providing a main central processing unit and a sub-central processing unit, the connection restriction class information for making external calls to the above extension is stored in the main memory of the main central processing unit, and the code editing information for selecting the route for making external calls is stored in the sub-central processing unit. Each of the main central processing units is set in the sub-memory of the processing unit, and when an outside line call is made by selecting an outside line call route, the main central processing unit compares the dial information from the calling extension with the connection restriction class information in the main memory. After identifying all of the external line originating routes for which the above-mentioned outgoing extension is allowed to make calls, by performing a vacancy check on all of the external line originating routes, all of the external line originating routes that are allowed to make external line calls and are vacant are identified. and sends the outside line origination route identification information under the above control and the code necessary for selecting the outside line origination route in the dial information from the extension to the above sub-central processing unit, and in response, the above-mentioned sub central processing unit , identifies the route with the highest priority among the outside line transmission routes, extracts code editing information corresponding to the route with the highest priority from the sub-memory and returns it to the main central processing unit; The unit edits all digits of the dial information to be sent to the outside line based on the returned code editing information and the dial information from the calling extension, and also uses the edited dial information and the connection restriction class in the main memory. An outside line origination connection restriction method in which the outside line origination restriction identification of the above-mentioned originating extension is performed again by comparing the information with the above information.