JPS611162A - Control system of forecast tone representing elapse of talking hour and minute - Google Patents

Abstract

PURPOSE:To transmit a forecast tone by allowing a cell processing control section of a private branch of exchange to reference a caller class memory and a called party number class memory and starting a forecast tone control section only when the both can transmit the forecast tone to apply the titled system to an exchange where data lines and public telephone circuits exist in mixture. CONSTITUTION:An extension subscriber 1 and a trunk 3 are connected to an exchange switch 2 and when dialing of the subscriber 1 is finished, a call processing control section 4 controls the switch 2 and connects the trunk 3 to the subscriber 1. A caller class memory 6 storing forecast tone transmission propriety information corresponding to the caller extension and a called party class memory 7 storing forecast transmission propriety information corresponding to the called party number are connected to the control section 4. Then the memory 6 is referenced depending on the allocated position of the subscriber 1 at exchange connection and the dial information references the memory 7. In referencing the memories 6, 7, the forecast tone control section 5 is started only when the talking hour minute elapse forecast tone is transmitted and a forecast tone is transmitted to the trunk 3 at the elapse of a prescribed time.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for controlling the transmission of a call time elapse forecast tone, which is sent out in a private branch exchange to predict the elapse of call time.

Conventional technology A call time elapsed forecast tone uses a timer or the like to be sent, for example, every three minutes from the start of a call to notify the caller of the elapsed call time. There are methods in which the call is sent to all callers who have made a call to a specific route (for example, a remote GI in Nagoya, Osaka, etc.), and a method in which the call is sent only to calls made from a specific extension. There are methods such as a method that sends a call only when a call is made from a specific extension to a specific route, and so on.

However, the above-mentioned conventional method has the disadvantage that the forecast sound is also transmitted during data communication or facsimile signal transmission, which may interfere with normal data exchange or mix noise into the received image6. However, a system in which calls are sent only to a specific extension or a specific route is difficult to apply to a switched network that is connected via a plurality of switchboards.

purpose of invention The object of the present invention is to overcome the above-mentioned drawbacks of the prior art.

To provide a call time elapsed forecast sound control method that transmits a forecast sound only to connections that require the forecast sound, and does not transmit the forecast sound to connections during data communication or facsimile transmission. There is a particular thing.

Structure of the Invention The call time/minute progress forecast sound control method of the present invention includes a caller class memory storing information on whether or not to send a call time/minute progress forecast sound for one caller in a private branch exchange, and a caller class memory for each called party number. The call processing controller of the private branch exchange refers to the calling party class memory and the called number class memory when a call path is connected. The present invention is characterized in that the call time progress forecast sound is transmitted only when both the calling party and the called party are capable of sending the call time progress forecast sound.

Embodiments of the Invention Next, the present invention will be described in detail with reference to the drawings.

The figure is a block diagram showing one embodiment of the present invention. That is, when extension subscriber 1 and trunk 3 are connected to exchange switch 2, and extension subscriber 1 goes off-hook and completes the connection, call processing control section 4 controls exchange switch 2 through a series of connection controls to disconnect the extension. Connect subscriber 1 to trunk 3, start another exchange from trunk 3, and connect subscriber 1 to trunk 3.
The extension subscriber 1 and the intended communication partner are connected via a dedicated line or the like connected to the extension subscriber 1 and the intended communication partner.

The call processing control unit 4 includes a calling party class memory 6 that stores information on whether to send a forecast tone for each calling extension, and a called number class memory 7 that stores information on whether to send a forecast tone for each called party number. At the time of connection, the calling party class memory 6 is referred to according to the accommodation location of the extension subscriber 1, and the called number class memory 7 is referred to according to the terminal information to identify the calling extension subscriber 1 and the connected party. The information on whether or not the call time progress forecast sound can be sent is read out, and the forecast sound control unit 5 is activated only when it is possible to send the call time progress forecast sound to any of them.

The forecast sound control unit 5 sends a forecast sound to the trunk 3 at regular intervals, and the forecast sound is transmitted to the extension subscriber 1 and the other party. If the extension subscriber or the other party or both are data terminals or facsimile machines,
Correspondingly, information indicating that the call time progress forecast sound cannot be sent is stored in the calling party class memory 6 and the called number class memory 7, so that the call processing control unit 4
never starts. Therefore, it is possible to prevent data exchange and facsimile transmission from being disturbed by the forecast sound. Even when the calling party is a trunk, it is possible to similarly prevent the transmission of harmful forecast tones.

Effects of the Invention As described above, the present invention provides a calling party class memory and a called number class that store information on whether or not a call time elapse forecast tone can be sent corresponding to the calling party's and called party's numbers, respectively. The call processing control unit of the private branch exchange refers to the calling party class memory and the called number class memory when connecting the calling party and the called party, and both of them are forecast tone control units. Since the forecast sound controller is configured to activate only when the forecast sound is detected, it can be applied to switched networks where data lines and public lines are mixed, and the forecast sound can be sent to prevent harmful connections. This has the effect of preventing the forecast sound from being sent out.

[Brief explanation of the drawing]

The figure is a block diagram showing one embodiment of the present invention. In the figure, 1: extension subscriber, 2° exchange switch, 3
Nidrank, 4: Call processing control unit, 5: Forecast sound control unit, 6
- Calling party class memory, 7: Called number class memory.

Claims (1)

[Claims] In a private branch exchange, there is a calling class memory that stores information on whether or not to send a call time elapsed forecast sound for the calling party, and a called number class that stores information on whether or not to send a call time elapsed forecast sound for the called party number. The call processing control unit of the private branch exchange refers to the calling party class memory and the called number class memory when a call path is connected, so that both the calling party and the called party can receive an estimate of the elapsed time and minutes of the call. A call time elapsed forecast sound control method characterized in that a call time elapsed forecast sound is transmitted only when sound transmission is possible.