JPS61230492A - Processing system for direct inward dialing incoming - Google Patents

Abstract

PURPOSE:To reduce a memory capacity necessary for a Direct Inward Dialing (DiD) service by producing an extension representative group. CONSTITUTION:A private branch exchange consists of an exchange switch (NW) 12, a control device (CC) 11 and a memory 13 etc. and the control device 11 proceeds the exchange switch 12 by a prescribed program process. And in an exchange controlling, a means 110 which converts temporarily a receiving code received from a DiD call to an extension representative group number is providded and when a DiD receiving call is received, an extension representative registration table is indexed by a group number obtained from the conversion means 110 and the receiving call is received by the indexed extension representative. Extension telephone sets 3a-3e consist of one group and the extension telephone set 3a is the representative telephone set of the group. Thus, by consisting an incoming extension representative group, the constitution of a conversion table to a group number is simplified and a registration table is reduced by making the extension telephone sets into a group. Therefore, the reduction of whole of the memory capacity necessary for the DiD service is realized.

Description

[Detailed Description of the Invention] [Summary] In an electronic private branch exchange having a DiD service function, incoming calls are processed using the extension representative group number, and the DiD
Reduce memory capacity for services.

[Industrial application field]

The present invention is an electronic private branch exchange system.
(abbreviation for "tinward dialing") service, and particularly relates to a method of converting a received code from a station to a called extension number.

The memory capacity for conventional DiD services is very large, and there has been a strong desire to develop a method that can reduce this memory capacity.

[Conventional technology]

In the conventional electronic private branch exchange DiD service,
As a method for converting the received code from the station to the called extension number, there is a method in which the received code and the called extension number are made to have a one-to-one correspondence.

FIG. 5 is a diagram showing an example of the state of trunks and extensions in the conventional DiD system.

FIG. 6 is a diagram showing an example of a reception code/incoming extension number conversion table.

In the diagram, ■ is a private branch exchange (PBX), 2 is a central office exchange, and 3 is a private branch exchange (PBX).
a, 3b, 3c, 3d, and 3e are extension subscribers of the PBX 1, 4a, 4b, 4c, 4d, and 4e are subscribers of the central office exchange 2, and 5a, 5b, 5C15d, and 5e are trunks of the central office exchange 2, respectively; 6a, 6b16c, 6d, 6e are each P
This is the trunk of BX1. The same symbols represent the same objects throughout the following discussion.

For example, assume that the PBX has 100 extension lines, all of these lines are registered as DiD targets, and the reception code from the station (subscriber number assigned by the station) is 4 digits.

When a call is received from a station, the receiving code and extension number usually do not match, so it is necessary to convert the receiving code to an extension number, but in the case of the conventional method where the receiving code and the receiving extension number correspond one-to-one. As shown in FIG. 6, the reception code/incoming extension number conversion table T stores the reception code and extension number from the station in pairs per block.

If each reception code number consists of 4 bytes, 400 bytes are required for 100 lines.

[Problems to be Solved by the Invention] Accordingly, in the conventional system, in the case of a station with a large number of received codes, as is clear from the above explanation, the disadvantage is that the received code/incoming extension number conversion table requires a large amount of memory. There is.

An object of the present invention is to reduce the memory capacity required for the DiD service by changing the conversion method from the reception code to the called extension number, thereby reducing the cost required to implement a predetermined service.

[Means for solving problems]

The present invention will be explained with reference to the principle block diagram of FIG.

In FIG. 1, the private branch exchange processes a device switching switch 12 that is composed of a switching switch (NW) 12, a control device (CC) 11, a memory 13, and the like.

Here, in the exchange control, a means 11 for once converting the reception code received from the DiD call into an extension representative group number.
0, and when there is a DiD incoming call, the extension representative registration table is indexed using the group number obtained by the conversion means 110, and the call is made to the indexed extension representative.

FIG. 1 shows that extension telephones 3a to 3e form one group, and extension telephone 3a is the representative telephone.

[Effect]

According to the present invention, by forming an incoming extension representative group, the configuration of a conversion table to a group number can be simplified.
In addition, the number of registration tables can be reduced by representative grouping. Therefore, it is also possible to reduce the overall memory capacity required for the DiD service.

〔Example〕

FIG. 2 is a diagram showing an embodiment of the incoming call processing method according to the present invention.

As explained in FIG. 1, when the control device 11 receives an incoming DiD call, it extracts the class information of the incoming trunk from the memory 13 in step (2) in FIG. Determine whether this class information is a DiD call or not.■.

If it is a general incoming call, it will be processed as an incoming call at a relay stand (relay stand).

On the other hand, if it is a DiD call, the reception code/DiD call representative group number conversion table (GIlhT) 30 is indexed,
■Extract the group number (△ mark) that corresponds to the reception code (x mark).

Next, the representative extension registration table (P!lkLT) 40 is indexed using this group number (△ mark).

The extension representative number (O) that corresponds to this group number (△ mark)
■ Extract the mark).

■ Process incoming calls using this extension representative number (marked with 0).

FIG. 3 is a diagram showing an example of the configuration of a reception code/DiD call representative group number conversion table (GNaT) 30 according to the present invention.

FIG. 4 shows a representative extension registration table (pNQ) according to the present invention.
T) An example of the configuration of 40 is shown.

For example, as shown in FIG. 1, it is assumed that five extensions form a representative extension group, and group numbers 1 to 20 are assigned to the representative extensions.

In this case, the receiving code/incoming extension number conversion table only requires 3 bytes to accommodate the receiving code from the station and the DiD incoming representative group number per block, as shown in Figure 3. Therefore, in the case of 100 lines, requires 300 bytes.

Furthermore, 40 bytes are required for a table as shown in FIG. 4 for determining the representative extension number using the extension representative group number as an index.

Therefore, a total of 34 bytes is required, and the memory capacity can be reduced by about 15%.

〔Effect of the invention〕

As described in detail above, the present invention has the great effect of making it possible to reduce the memory capacity required for the DiD service by creating a representative group of incoming extensions.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the principle of the present invention. FIG. 2 is a diagram showing an embodiment of the incoming call processing method according to the present invention. FIG. 3 shows an example of the configuration of a reception code/DID incoming representative group number conversion table (GllhT) according to the present invention. FIG. 4 is a representative extension registration table (P fish T) according to the present invention.
The figure which shows an example of a structure. FIG. 5 is a diagram showing an example of the state of trunks and extensions in the conventional DiD system. FIG. 6 is a diagram showing an example of a reception code/incoming extension number conversion table. In the figure, l is a PBX, 2 is a central office exchange, and 3a to 3e are P
Extension subscribers of BX 1, 4a to 4e are subscribers of central exchange 2, 5a to 5e are trunks of central exchange 2, 6a
~6e are the trunks of PBX 1, 7 is the representative telephone,
Reference numeral 30 denotes a reception code/DID incoming representative group number conversion table (GllklT), 40 a representative extension registration table (PNctT), and 110 a means for converting the reception code into an extension representative group number. Thing 4th

Claims (1)

[Scope of Claims] A private branch exchange equipped with a DiD service function includes means (110) for converting a received code from a station into an extension representative group number, and when there is an incoming DiD call, the received code is converted to the above-mentioned number. Means (11
0), the dial-in incoming call processing method is characterized in that the number is first converted to the extension representative group number, and the extension representative group number is converted to an extension number.