JPH0447794A - Extension call method - Google Patents

Abstract

PURPOSE:To allow calls by group to be reached by sending a setup message including an ISDN subaddress of an extension terminal to each of all extension terminals corresponding to ISDN subaddresses respectively. CONSTITUTION:A master set 20 is provided with a CPU 22 for extension call processing, a ROM 24 with a control program or the like for extension calling stored therein and a conversion table (conversion RAM) 26 for extension ISDN subaddress conversion respectively. Moreover, the conversion table 26 stores a table converting an incoming ISDN subaddress into an extension ISDN subaddress. Thus, there are two kinds of incoming ISDN subaddresses, designation of individual extension terminal and group designation, and an extension ISDN subaddress is designated corresponding to them. Thus, only one extension terminal is called with the simple method and calling to extension terminals by optional group is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an extension calling method for a main device suitable for application to an ISDN home system such as an ISDN exchange or an 15DN key telephone system.

``Prior Art'' I In an 15DN home system such as an SDN exchange or an 15DN button telephone system, as shown in FIG. is connected.

An outside line boat 30 and an extension boat 40 are connected to the main device 20, and the above-mentioned plurality of extension terminals 1 to 8 are connected to the extension boat 40.

These extension terminals 1 to 8 are configured with unique l5DN subaddresses 101 to 108, respectively, and these multiple extension terminals 101 to 108 are configured to be grouped into several groups as shown in FIG. In some cases. The example shown in FIG. 5 shows a case where the data can be grouped into three groups.

Now, in the 15DN home system configured as described above, when specifying an extension terminal on the same bus as the receiving terminal, a set-up message that does not include the terminating ISDN sub-area address is sent to that extension boat (bus) 40. Call all connected extension terminals or call IS
By sending a set up message that includes a DN subaddress, if different 15DN subaddresses are given to all the extension terminals connected to the extension boat 40 as shown in FIG. Only one extension terminal can be specified and called.

In addition, if extension terminals are grouped as shown in Figure 5, and an l5DN subaddress is given to that group, multiple extension terminals corresponding to that called I SDN subaddress can be called. It will be done.

For example, when group 1 is specified, extension terminals 1, 2, and 3 belonging to group 1 are called.

``Problem to be Solved by the Invention'' Therefore, when the 15DN subaddress is set as shown in FIG. 4, it is not possible to call any plurality of extension terminals.

Furthermore, as shown in FIG. 5, when an 15DN subaddress is set for a group, calls are made in groups, and therefore it is not possible to call any one extension terminal.

Therefore, this invention solves these problems and proposes an extension calling method that allows calling any one extension terminal and also allows calling any group. .

"Means for Solving the Problem" In order to solve the above-mentioned problem, in this invention, l
When specifying an extension terminal on the same bus that is accommodated in the main device of a 5DN home system as the receiving terminal, the receiving terminal in the set-up message sent by the calling terminal
By converting the SDN subaddress using the conversion table inside the main unit and sending a set up message containing the ISDN subaddress of that extension terminal to each extension terminal corresponding to that ISDN subaddress, it is possible to convert the SDN subaddress by group. It is characterized by being able to receive calls.

``Operation'' The main device 20 is provided with a conversion table as shown in FIG. 3, which has a correspondence table between the called ISDN subaddress and the 15DN subaddress of the extension terminal.

Each extension terminal has a unique l5D as shown in Figure 3.
Address the N sub-address.

By doing so, when a call is received to the main device 20, the called 15DN subaddress in the received set-up message is converted to the ISD of the extension terminal using the conversion table.
Converted to N subaddress.

Through this conversion, by sending a set up message containing the 15DN subaddress of the extension terminal to each of all extension terminals corresponding to the 15DN subaddress, calls to individual extension terminals and calls by arbitrary groups can be made.

"Example" Next, an example of the extension calling method according to the present invention will be described in the first example.
This will be explained in detail with reference to the figures below.

In this invention, the called 15DN subaddress and the extension terminal's I
A conversion table as shown in FIG. 3 having a correspondence table with SDN subaddresses is prepared, and each extension terminal is assigned a unique 15DN subaddress.

By doing so, when an incoming call is received to the main device 20, the incoming 15DN subaddress in the incoming set-up message is converted to the extension terminal's I5DN subaddress using the conversion table 26.
Convert to SDN subaddress. This allows both calls to individual extension terminals and calls by group.

The present invention will be described in detail below with reference to embodiments embodying the extension calling method according to the present invention.

FIG. 1 shows an example of an ISDN home system embodying the present invention, in which a main device 20 is connected to an outside line boat 30 and a plurality of extension boats, of which one extension boat 40 has eight extension terminals 1 to 8 are connected to multidrop.

The respective extension terminals 1 to 8 are given l5DN subaddresses 101 to 108 and are also grouped. In the embodiment, it is divided into three groups 1 to 3, and each group also has l5DN subaddresses 110 and 12.
0,130 is given.

The main device 20 includes a CPU 22 for processing extension calls, a control program for extension calls, etc.
A conversion table (conversion RAM) 26 for converting the OM 24 and the extension ISDN subaddress is provided, respectively.

Assume that the conversion table 26 stores a table for converting a called 15DN subaddress into an extension 15DN subaddress, as shown in FIG. 3, for example.

Therefore, there are two types of terminating ISDN subaddresses: one in which individual extension terminals are specified, and the other in which a group is specified. There is.

The next incoming call operation using such a conversion table 26, that is, the ringing operation when a call is received from an outside line, will be explained with reference to FIG.

In FIG. 2, when there is an incoming call (step 51), the incoming call is
The specific address for the 5DN sub-address is referenced and converted to the extension 15DN sub-address (step 5).
2).

Next, a set-up message containing the converted extension 15DN subaddress is sent to the extension boat 40 (step 53). After sending, the unsent terminating 15DN subaddress is checked, and if a corresponding extension 15DN subaddress exists, the conversion process to the extension ISDN subaddress is executed again (steps 54.52.53).

Converted extension I SDN subaddress (extension baud) 4
0, it checks whether there is a connection request from an extension terminal (step 55), and if there is a connection request, it performs connection processing for the extension and line disconnection processing for other extension terminals. Then, the extension calling process is completed (step 56).

Next, a specific example will be shown.

The caller uses the terminating ISDN address and terminating 15DN subaddress 10 given to the outside line 30 of the main device 20.
Sends a set up message containing 1.

The main device 20 that received this set-up message is the CP
According to the control program of U22 and ROM 24, the called 15DN subaddress contained therein is converted according to the conversion table 26 shown in FIG.

As a result, among the extension terminals that are connected to the extension boat 40 in a multi-drop manner, the l5DN subaddress 101
Only the extension terminal l given the call will receive the call.

Group 2, for example 12 callers,
The arrival IS given to the outside line boat 30 of the main equipment 20
A set-up message containing the DN address and the called 15DN subaddress 110 is sent.

The main device 20 that receives this set-up message converts the called 15DN subaddress contained therein according to the conversion table 26 shown in FIG. Then, a set-up message including the terminating I5DN subaddress 101 is sent to the extension boat 40, and the terminating ISDN subaddress 10 is sent to the extension boat 40.
2 and a set-up message including the destination ISDN subaddress 103.

As a result, among the extension terminals connected to the extension boat 40 in a multi-drop manner, the extension terminals of group 1, that is, extension terminal 1 given the ISDN subaddress 101, extension terminal 2 given the l5DN subaddress 102, and ISDN Each of the extension terminals 3 given the sub address 103 receives the call.

Among these three extension terminals 1.2.3, the one that returns the connection request earliest is given the right to talk, and a disconnection message is sent to the other two to perform the disconnection process.

In this way, each extension terminal can be called individually, or groups can be called.

Note that this grouping can be easily changed by rewriting the conversion table 26.

"Effects of the Invention" As explained above, according to the extension calling method according to the present invention, it is possible to call only one extension terminal in a simple manner, and it is also possible to call extension terminals in any group. Has characteristics.

Therefore, as described above, the present invention provides an L5DN switch, a TSDN button telephone system, etc.
It is extremely suitable for application to an extension calling method for the main device in a DN home system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an l5DN home system showing an example of implementing the extension calling method according to the present invention, FIG. 2 is a flowchart showing an example of a processing flow for implementing the extension calling method, and FIG. FIGS. 4 and 5, which show one embodiment of the conversion table according to the present invention, are block diagrams of an 15DN home system for explaining the present invention. 1 to 8 ・ 20 ・ 22 ・ 24 26 ・ 30 ・ 40 ・ Extension terminal main unit PU OM Conversion table External line boat Extension boat

Claims (1)

[Claims] (1) When specifying an extension terminal on the same bus that is accommodated in the main device of the ISDN home system as the receiving terminal, the calling terminal in the setup message sent by the calling terminal
By converting the SDN subaddress using the conversion table inside the main unit and sending a setup message containing the ISDN subaddress of that extension terminal to each extension terminal corresponding to that ISDN subaddress, it is possible to receive calls by group. An extension calling method characterized by the following.