JPH03217154A - Subscriber call control system - Google Patents

Abstract

PURPOSE:To preliminarily control and register call setting to control the call of a caller by providing a private branch electronic exchange with a storage means in which a callee registers control information of call setting due to the caller and setting the call after confirming this control information. CONSTITUTION:When the callee preliminarily dials a prescribed special number for call rejection for the purpose of controlling the call setting, information of call rejection is stored in a storage area corresponding to the extension telephone set provided in a main storage device 5. At the time of call setting operation, the caller originates a call by an extension telephone set 1a to dial the telephone number of the callee. A central processing unit receives this telephone number to confirm the idle state of the callee. When the callee, is not idle, the central processing unit refers to the main storage device 5 to discriminate whether call setting is preliminarily controlled by the callee or not; and if it is controlled, a call control tone is sent from a tone generator to terminate the processing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a subscriber call regulation system in a private electronic exchange.

[Conventional technology]

Conventionally, in the subscriber call restriction system in private electronic exchanges, first, a central processing unit (not shown) receives the telephone number of the called party dialed by the calling party and checks the status of the called party. If the called party is free, it connects the calling party immediately, but if the called party is blocked or locked out, it sends a restriction tone, such as a reorder tone, to the calling party. If the called party is busy, the calling party dials a predetermined special number, and the central processing unit determines when the called party ends the call and the call becomes idle. Check whether it is OK to set up a call when the called party is called.If the called party has already been set up to be called by another caller, multiple settings cannot be made at the same time.
Sends a regulation sound. If the call setting is possible, a confirmation tone is sent to the caller. When a call is set, the central processing unit automatically calls the called party after the called party ends the call.

[Problem to be solved by the invention]

In the conventional subscriber call restriction method described above, calls can be set up freely from one or more extension subscribers to the called party, so that calls can be set up even if the called party is busy. However, it has the disadvantage that it is called one after another. SUMMARY OF THE INVENTION An object of the present invention is to provide a subscriber call restriction system that can restrict calls by the caller by registering restrictions in advance when the called party is busy. [Means for Solving the Problems] In the subscriber call restriction system of the present invention, in a private electronic exchange, when the first extension subscriber is busy, the second extension subscriber calls the first extension subscriber. For a call setting that re-calls the first extension subscriber when a call cannot be received to the subscriber, storage means is provided for registering restriction information of the call setting by a special number selection signal, When a call is received from the second extension subscriber to the first extension subscriber who is talking with a person, the storage means is referred to, and even if the first extension subscriber becomes free, the second extension subscriber The first extension subscriber is configured not to call the first extension subscriber. [Example] Next, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a private electronic switching system for explaining one embodiment of the present invention. In FIG. 1, the local electronic switching system connects extension telephones Iil. It includes a communication path switch 3 connected to communication path switches a to 1c, a central processing unit 4 that controls the communication path switch 3, and a main storage device 5 that is connected to the central processing unit 4 and registers restriction information for call settings. The extension telephone 1a is the calling party (second subscriber), the extension telephone 1b is the called party (first subscriber), and the extension telephone IC is the subscriber (other subscriber) who is talking with the extension telephone 1b. 2 is a flowchart showing the flow of processing in an embodiment of the present invention.The operation will be explained below using FIGS. 1 and 2.FIG. In the rejection setting operation for registering restriction information on call settings, when the called party wants to restrict call settings, he or she dials a predetermined call rejection special number (step 10).This special number is sent to the central processing unit 4. The reception is identified in the main storage device 5, and the call rejection information is stored in the storage area corresponding to the extension telephone provided in the main storage device 5.
When this registration operation is completed, a setting confirmation sound is sent out from a tone generator (not shown) according to an instruction from the central processing unit (step 11).

In the call setting operation, first, the calling party uses extension telephone 1a.
(Step 20) and dial the telephone number of the called party (Step 21). The central processing unit receives this telephone number and checks the availability of the called party (step 22).
). If the called party is free, the called party is first called (step 23) as is the normal connection operation, and when the called party is answered (step 2).
4), 5 Start the call (step 25) and end the call (step 26). If the called party is not available, it is determined whether the called party is blocked or locked out, that is, is not on a call (step 27). In the case of a blockage or lockout state, the central processing unit sends out a call restriction tone from the tone generator to prevent the caller from setting up a call (step 28), and ends the process. If not blocked or locked out, the caller hears a busy tone (step 29) and dials a predetermined special number for call setup (step 30). The central processing unit receives and identifies this and verifies that the calling or called party is not currently set up to or from any other subscriber (step 31). If so, it is not possible to make settings for multiple subscribers at the same time, so the process goes to step 28. If not, it is determined by referring to the main storage device 5 whether the call settings have been regulated in advance by the called party (step 32) At this time, if the call settings are restricted, go to step 628; if not, the caller is allowed to make the call settings, and the central processing unit issues a confirmation tone to the caller after the settings are complete. Send (step 33) and end the process.

In addition, when canceling the call rejection setting, by dialing a predetermined special number, the central processing unit will receive and identify the number, erase the information stored in the main memory, and ensure that this operation is carried out reliably. You can confirm by listening to the release confirmation sound.

〔Effect of the invention〕

As explained above, the present invention is configured such that a private electronic exchange is provided with a storage means in which the called party registers the restriction information of the call settings by the calling party, and after confirming this restriction information, the call settings are made. Therefore, if the called party is busy, it is possible to restrict calls by the calling party by registering restrictions in advance.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an in-ellipse electronic exchange system for explaining an embodiment of the present invention, and FIG. 2 is a flowchart showing the processing flow of an embodiment of the present invention, 1a to 1c... ...Extension telephone, 2a-2c...
...Subscriber circuit, 3...Telephone bribe switch, 4
. . . Central processing unit, 5 . . . Main storage device.

Claims (1)

[Claims] In a private electronic branch exchange, when a second extension subscriber cannot receive a call to the first extension subscriber because the first extension subscriber is busy, the first extension subscriber is called again. A storage means is provided for registering restriction information of the call setting by a special number selection signal, and the first extension subscriber who is on a call with another extension subscribes to the second extension. When the second extension subscriber receives a call from the first extension subscriber, the second extension subscriber refers to the storage means and sets so that the second extension subscriber does not call the first extension subscriber even if the first extension subscriber becomes free. A subscriber call regulation method characterized by: