JP3231724B2 - International incoming call priority connection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a priority connection method for an international incoming call to an ISDN primary subscriber.

[0002]

2. Description of the Related Art In a situation where there are many transactions with foreign companies, such as foreign-affiliated companies, an international incoming call requiring urgency during a high traffic period cannot be connected because Bch is busy. There's a problem. Japanese Patent Laid-Open No. 58-1 describes a priority connection in the inter-station connection between exchanges.
As shown in Japanese Patent Publication No. 41062, it is possible to control the priority connection of the interoffice line according to the calling user type, but the priority connection technology of the international incoming call relating to the subscriber line interface has not been realized.

[0003] The present invention has been made in view of the above-mentioned problems, and has as its object to provide a priority connection method for international incoming calls.

[0004]

In order to achieve the above object, the present invention provides, as a first means, a method for preferentially connecting an international incoming call to an ISDN primary subscriber. On the other hand, an international incoming call dedicated Bch is set in advance, and when an international incoming call is input to the local exchange, the international incoming call exclusive B is set.
A means of performing subscriber incoming call processing using the channel is adopted.

[0005] As a second means, in the first means, an international incoming call dedicated Bch is preset for a certain area of the ISDN primary rate interface, and the international incoming call is input to the local exchange. Then, there is adopted a means of performing subscriber incoming call processing using the international incoming call dedicated Bch in an empty state.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the international incoming call priority connection method according to the present invention will be described below with reference to the drawings. In this embodiment, a subscriber is provided as one telephone service (international incoming call priority connection service) realized by a known subscriber exchange.

FIG. 1 is a system configuration diagram of a subscriber exchange system to which the present embodiment is applied. In this figure,
Reference numeral 1 denotes a transmission line (trunk), 2 denotes a local exchange, 3 denotes an ISDN primary group interface, and 4 denotes a PBX (Private
Branch Exchange: Private branch exchange), 5 is a subscriber terminal, 6
Is a maintenance terminal.

[0008] The local exchange 2 exchanges a connection call inputted through the transmission line 1 and sends it out to any of the ISDN primary group interfaces 3. The ISDN primary rate interface 3 communicates with such a local exchange 2
There are a plurality of ISDN interfaces that mediate communication with the BX4. The PBX 4 exchanges a connection call input from the local exchange 2 through the ISDN primary rate interface 3 to each subscriber terminal 5 in the premises. Further, the maintenance terminal is connected to the local exchange 2 for maintenance and inspection of the local exchange 2, and corrects and changes various settings related to the function of the local exchange 2.

FIG. 2 is a block diagram showing a main configuration of the local exchange 2. As shown in the figure, the local exchange 2 comprises a destination basic call processing unit 2a, a subscriber data control unit 2b, a subscriber routing control unit 2c, and a destination path setting processing unit 2d.

Next, the operation of this embodiment will be described with reference to FIGS. In order for the international incoming call priority connection service to function, first, the maintenance terminal 6 informs the local exchange 2 that the international incoming call priority connection service is to be operated and the ISDN primary group interface 3 has an international connection. It is necessary to set the range of the incoming call-only Bch in advance.

When an international incoming call is input to the local exchange 2 via the trunk 1, the destination basic call processing unit 2a reads basic subscriber data and a service list from the subscriber data control unit 2b. Then, based on the basic subscriber data and the screw list data, the recipient of the international incoming call is
It is determined that the subscriber is a DN primary group subscriber and is registered in the international call priority service.

When the determination is "Yes", the subscriber routing 2c searches for an empty area in the range of the international incoming call-dedicated Bch registered in advance as described above, thereby obtaining an empty Bch (designated Bch). Is specified, and this information is provided to the called-side basic call processing unit 2a. The called-side basic call processing unit 2a provides this information to the called-path setting processing unit 2d,
The communication path for the international incoming call is set to the designated Bch. Then, when the communication path for the international incoming call is set in this way, the called-side basic call processing unit 2a performs the subscriber incoming call processing for the international incoming call via the communication path.

The local exchange 2 has an international incoming call only B
When a new international call arrives when all Bchs registered as channels are busy, the Bch other than the international incoming call dedicated Bch is searched for empty,
The incoming call is processed by specifying the channel.

Further, by combining this embodiment with call forwarding, it is possible to make an international incoming call to any terminal. Furthermore, without limiting incoming calls to international calls,
NO. Bch by originating user type included in 7 signals
Priority connection is also conceivable.

[0015]

As described above, the international incoming call priority connection method according to the present invention has the following effects.

(1) In the priority connection method of the international incoming call to the ISDN primary subscriber, a BCH dedicated to the international incoming call is previously set for the ISDN primary interface in the subscriber exchange, and the international incoming call is set to the subscriber exchange. , The subscriber incoming call processing is performed using the international incoming call dedicated Bch, so that it is possible to prevent the international incoming call from being blocked.

(2) An international incoming call dedicated Bch is preset for a certain area of the ISDN primary group interface, and when an international incoming call is input to the local exchange, the international incoming call exclusive Bch is empty. Therefore, even if one BCH dedicated to international incoming calls is in a busy state, the incoming call BCH dedicated to incoming calls is processed using the Bch dedicated to international incoming calls in another empty state. It can be carried out. Therefore, it is possible to more reliably prevent the loss of an international call.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a local exchange system to which an embodiment of the present invention is applied.

FIG. 2 is a block diagram illustrating a functional configuration of a local exchange according to an embodiment of the present invention.

[Explanation of symbols]

 1 transmission line (trunk) 2 subscriber exchange 2a destination basic call processing unit 2b subscriber data control unit 2c subscriber routing control unit 2d destination path setting processing unit 3 ISDN primary interface 4 ... PBX 5 ... Subscriber terminal 6 ... Maintenance terminal

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H04M 3/00 H04M 3/16-3/20 H04M 3/38-3/58 H04M 7/00-7 / 16 H04Q 3/58-3/62

Claims (2)

(57) [Claims] 1. A priority connection method for an international incoming call to an ISDN primary subscriber, wherein a BCH dedicated to an international incoming call is previously set for an ISDN primary group interface (3) in a subscriber exchange (2). An international incoming call priority connection method, wherein when an international incoming call is input to the local exchange (2), the incoming call processing is performed by using the international incoming call dedicated Bch. 2. An ISDN primary rate interface (3).
When an international incoming call is input to the local exchange (2), an international incoming call dedicated Bch is set in advance for a certain area.
2. The international incoming call priority connection method according to claim 1, wherein subscriber incoming call processing is performed using an international incoming call dedicated Bch in an empty state.