JPH039645A - Private branch exchange - Google Patents

Abstract

PURPOSE:To improve the working efficiency of an extension terminal by refusing incoming call when it is the one on which no incoming sub-address information element to specify an incoming terminal is attached. CONSTITUTION:For example, when a call setting message is received from a line 1 via a digital public network(ISDN) interface 4, a CPU 10 detects the incoming subaddress information element included in the call setting message. When no incoming subaddress is detected in a received call setting message, incoming refusal is informed to the ISDN interface 4, and a release completion message including a reason display information element representing the reason and the specification of the noncoincidence of a terminal attribute is sent to a network, and an incoming call is interrupted, then, a processing is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a private branch exchange, and particularly to a private branch exchange connected to a digital public network.

[Prior Art] In recent years, with the development of digital communication technology, conventional public telephone networks have also come to be configured with digital lines. In the l5DN, which is a typical public communication network, when dialing a call, it is possible to send a subaddress in addition to the other party's line number, so the subaddress can be used to specify the extension of the private branch exchange connected to the network. It is now possible to receive calls directly.

[Problems to be Solved by the Invention] However, in the conventional example described above, in the case of an incoming call without a called subaddress added, all extension terminals corresponding to the line number are ringed, resulting in the following drawbacks: there were.

(1) There is a high possibility that a person or terminal that does not wish to communicate on the calling side will respond, and the responder or response terminal will be used for communication that is not originally necessary, which is uneconomical. It is.

(2) If the relevant terminal is a facsimile machine or the like, situations such as leakage of secrets and loss of documents may occur due to a terminal that should not originally receive the call responding.

(3) Even if the receiving side does not want to accept incoming calls from parties other than those to whom the sub-address has been notified in advance, unnecessary incoming calls will be accepted, reducing traffic and economic efficiency.

The present invention was made to solve the above problems, and
In the case of an incoming call that does not include a called subaddress information element that identifies the called terminal, by rejecting the incoming call,
To provide a private branch exchange that improves the utilization efficiency of extension terminals without responding to unnecessary incoming calls.

[Means for Solving the Problems] In order to achieve the above object, the private branch exchange of the present invention has the following configuration. That is, in a private branch exchange that accommodates a plurality of extension terminals and performs circuit switching by identifying the called terminal from the extension terminals based on the called subaddress information element included in the called information, the called information including the called subaddress information element is received. receiving means;
It has a determining means for determining whether or not there is a called sub-address information element in the incoming call information from the receiving means, and a rejecting means for rejecting the incoming call if the result of the determining means is that there is no called sub-address information element.

[Operation] In the above configuration, incoming call information including a called subaddress information element is received, and it is determined whether or not there is a called subaddress information element in the incoming call information.

Then, if the result of the determination is that there is no called subaddress information element, the call is rejected.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<Explanation of the configuration (Figure 1)> Figure 1 is a configuration diagram of a private branch exchange in which the present invention is implemented.
4567), 2 is the l5DN line (the line number is 12
3-7654), 3 is a private branch exchange, 4 and 5 are l5
DN interface (I/F), 6 is a CPU that controls the l5DN interfaces 4 and 5, 7 is a ROM that stores the program of the CPU 6, 8 is a RAM that the CPU 6 uses as a work when executing processing, 9 is an exchange switch memory (MTS), 10 is the main c that controls the entire exchange 3
pu, 11 is a ROM that stores the processing procedure (program) of the CPU 10, which will be described later; 12 is a RAM that the CPU 10 uses as a work when executing processing; 13 is a highway;
14 is an extension interface card, 15.16 is a CPU that controls the extension interface card, 17-20 are extension interfaces (LC), 21-26 are ISDN telephones connected to the extension interface 17, 27.28
I5DNG4 connected to extension interface 17
facsimiles, 29 to 31 are l5DN telephones connected to the extension interface 18; 32 are l5DNG4 facsimiles connected to the extension interface 18; 33 to 3;
6 is an l5DN telephone connected to the extension interface 19, 37.38 is an l5DNG4 facsimile connected to the extension interface 19, 39 is an l5DN telephone connected to the extension interface 2o, 40 is an l5DNG4 facsimile connected to the extension interface 20, 4
1 is a terminal group that responds to incoming calls on line 1, 4
2 is a terminal group that responds to incoming calls on line 2, and 43 is a keyboard for setting terminal subaddress information, which will be described later.

<Description of Initial Settings> Next, a description will be given of initial settings in which the user of the private branch exchange 3, which has one or more configurations, sets the number of the extension terminal to ring for the incoming line.

First, the incoming line (l or 2) determines which extension terminal (21
-40) Specify whether to make one sound. Next, the subaddress numbers of the extension terminals connected to each of the extension interfaces 17 to 20 are set. For example, the subaddresses of each extension terminal 21 to 40 are assigned numbers 21 to 40 respectively.
40, in this embodiment, in response to an incoming call to line 1, the incoming call to line 2 is sent to the extension terminal connected to extension interface 17.18, that is, the terminal with subaddresses 21 to 32. In response to an incoming call, the extension terminals connected to the extension interfaces 19 and 20, that is, the terminals at subaddresses 33 to 40, are notified of the incoming call.

The keyboard 43 is used to set each of the conditions described above. For example, the setting method is “#1=17=21
．． 22.23.24.25.26.27.28″#1
=18=29.30,31.32 ”“#2=19=
33.34, 35.36, 37.38 ””#2=20
=39.40'' is inputted sequentially from the keyboard 43, and the inputted data is stored in the RAM 12.Furthermore, each subaddress is set on the extension terminal side.

This setting method depends on the type of extension terminal and is not related to this private branch exchange, so a detailed explanation thereof will be omitted.

<Explanation of processing procedure (Figure 2)> Next, when an incoming call is received in this embodiment, the CPL
The processing procedure executed by JIO will be explained below according to the flowchart shown in FIG.

First, in step S1, when a call setup message is received from line 1 via the ISDN interface 4, the CPU 10 advances the process to step S2 and detects the called subaddress information element included in the call setup message. If the called party sub-address information element can be detected, the process advances to step S4, and the extension terminal sub-address information stored in the RAM 12 is searched in order to specify the extension terminal corresponding to the called party sub-address. This search process compares the received sub-address with the sub-addresses 21 to 32 of each extension terminal connected to the extension interface 17.18 for the incoming call to line 1, and determines whether a corresponding extension terminal exists. This is a process for determining.

For example, if the called sub-address is "21", as a result of the comparison, there is a terminal with the sub-address "21", so the CPtJ 10 advances the process to step S5, and the CPU 15 for controlling the extension interface receives the received call. Let me know. As a result, a call setup message is sent from the extension interface 17 to the extension terminal, and among the extension terminals 21 to 28 that received the call setup message, only the extension terminal 21 with the matching subaddress transmits the response message to the extension terminal. 17 (step S6)
. On the other hand, when the CPU 10 detects through the CPU 15 that the extension terminal 21 has responded (step S7), the CPU 10 detects that the extension terminal 21 has responded.
The response is transmitted to the N interface 4. Mote I
A response message is sent from the SDN interface 4 to the network side, and communication is started.

However, if the high layer compatibility and low layer compatibility do not match at the stage when the extension terminal 21 receives and receives the call setup message, the extension terminal 21 indicates the reason type of the terminal attribute mismatch to the extension interface 17. Send a release complete message containing the display information element and disconnect the incoming call.

If the received subaddress is ``33'', as a result of comparison with the data in the RAM 12, there is no extension terminal with the corresponding subaddress ``33'' in the extension terminal group 41, so the process proceeds to step S3. Proceed with the process.

Then, in step S3, the incoming call is rejected by 15D.
N interface 4, a release completion message containing a reason display information element indicating the type of reason for the terminal attribute mismatch is sent to the silk, and the incoming call is disconnected.

On the other hand, in step S2, if the called subaddress cannot be detected in the received call setup message, the process advances to step S3, and the L5DN interface 4 is notified of the rejection of the call, and the reason type of the terminal attribute mismatch is notified to the network. Sending a release completion message including a reason indication information element indicating
The incoming call is disconnected and the process ends.

FIG. 3 is a diagram illustrating a processing sequence when the received call setup message does not include a called subaddress.

As explained above, this embodiment has the following effects.

(1) Responder for communications that are not originally required, such as when a destination subaddress is not added.

Response terminals are no longer used, which improves administrative efficiency.

(2) When the relevant terminal is a facsimile machine, etc. 1. A terminal that should not receive a call will not respond, and confidentiality can be maintained. 1. Document loss can be prevented.

(3) When the receiving side does not want to accept incoming calls from anyone other than the party to whom the subaddress has been notified in advance, there is no need to accept unnecessary incoming calls, which improves traffic and economic efficiency.

In this embodiment, the sub-address settings of the extension terminals are set using the keyboard inside the exchange, but even if the main CPU collects and sets the contents set at each extension terminal via the extension interface control CPU, the same result will not occur. Content data can be stored in RAM. Also, this allows
Settings can be simplified.

In addition, in this embodiment, if the called subaddress information element is not added, or if the received called subaddress information element does not match the extension terminal subaddress, the same reason display information element is added and the disconnection is performed. ing.

In this case, problems may occur because the reason for the disconnection is not clearly known to the caller. Therefore, it is also possible to add the user and user information to the disconnection message to display a more detailed reason.

Furthermore, in this embodiment, the extension interface is equivalent to the 15DN interface, and eight terminals can be connected to the bus from one extension interface, but the extension side of the exchange needs to be equivalent to the 15DN interface. There isn't.

That is, as shown in Fig. 4, if one extension terminal can be connected to one extension interface and a subaddress is defined for each extension terminal, after the main CPU l receives the destination address information element, , simply switch the exchange switch and connect the line to the extension interface having the corresponding sub-address terminal.

[Effects of the Invention] As explained above, according to the present invention, if an incoming call does not include a called subaddress information element that specifies the called terminal, it is possible to respond to an unnecessary incoming call by rejecting the incoming call. (It is possible to improve the utilization efficiency of extension terminals.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the configuration of the private branch exchange in this embodiment, Fig. 2 is a flowchart showing the incoming call processing procedure in this embodiment, and Fig. 3 is a diagram illustrating the case where no terminating sub-address is added to the incoming call. , FIG. 4 is a diagram showing a modification of this embodiment. In the figure, 1, 2...l5DN line, 4.5...1. S
DN interface, 9...MTS, 10...CP
U, 17-20... Extension interfaces. Figure 2

Claims (1)

[Scope of Claims] In a private branch exchange that accommodates a plurality of extension terminals and performs circuit switching by identifying a called terminal from the extension terminals based on a called subaddress information element included in incoming call information, the incoming call includes the called subaddress information element. a receiving means for receiving information; a determining means for determining whether or not there is a called subaddress information element in the incoming call information from the receiving means; A private branch exchange characterized in that it has a refusal means for rejecting.