JPH01276954A - Extension caller for automatic exchange - Google Patents

Abstract

PURPOSE:To save a trouble and time for redialing if a called party does not reply a call or in case of wrong dialing by sending an abbreviation dial registered for a terminal number of other called party while a caller dials a called party from its multi-function terminal set so as to change the call destination. CONSTITUTION:When a all destination is changed to a communication terminal set 23 while a communication terminal set 21 makes a call to a communication terminal set 22, a central control unit 40 detects a call from the communication terminal set 21 at a line position A via an interface 11. Then the data state of an area of a line state 52 at the line position A of a main storage device 51 is changed from an idle state into a dialing state and an accommodated line to a main switch terminal A is connected to a register 30 via a main switch 10. A caller confirms the transmission enable state by listening to a dial tone and dials an abbreviation dial 3 registered in advance for the connection request to the communication terminal set 22. The register 30 receives a signal of the abbreviation dial 3 from the caller and transfers it to the central control unit 40. The central control unit 40 retrieves a terminal number 5678 at an area for a fixed data 53 to bring the line state 52 into the dialing state with respect to a line position B.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to an extension calling device in an automatic exchange.

[Conventional technology]

Conventionally, extension calling devices in this type of automatic exchange have been used to either continue calling until the called party answers if the called party does not answer, or to call again after a certain period of time, or to call the last digit of the terminal number. There is an extension calling method that allows you to change the call destination only to an arbitrary called terminal that differs only in the final digit by dialing additional numbers.

[Problem to be solved by the invention]

In the above-mentioned extension calling system in the conventional automatic switchboard, when the calling party changes the call destination to another called terminal while calling the called party, only the last digit is added by additional dialing of the called terminal number. It is possible to change the call destination only to a different called terminal, so if you want to change to a called terminal other than an arbitrary called terminal that differs only in the last digit, you must call the other called terminal again. There are flaws that need to be fixed.

An object of the present invention is to provide an extension calling device that solves the above problems.

[Means to solve the problem]

In order to achieve the above object, in the extension calling device for an automatic exchange according to the present invention, the calling party registers the terminal number of another called party while calling the called party from a multi-function terminal. This system has means for enabling dial transmission, and means for searching for a terminal number corresponding to a pre-registered speed dial and changing the call destination to the searched terminal.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a functional block diagram showing one embodiment of the present invention.

In FIG. 1, the main switch 10 is an interface 1
Communication terminals 21, 22, 23 and a register 30 are connected to main switch terminals A, B, and C via terminals 1, 12, and 13, respectively.
accommodating and connecting them to exchange and connect them to each other. Central control device 40
are interfaces 11, 12, 13. The register 30 and the main storage device 50 are coupled to exchange data information and control the exchange connection of the main switch 10. The main storage device 50 serves as a terminal data storage area. 51, there are areas for line status 52, fixed data (terminal number) 53, and terminal setting data 54. In the line status 52 area,
Conditions such as line blockages are recorded as the line status changes. The fixed data 53 area is data written in advance by a maintenance person/driver, and includes a terminal number corresponding to the position of the terminal line 51. In the area of terminal setting data 54, data is set by dialing from the communication terminals 21, 22, 23, and the terminal number of the other party registered as a speed dial is registered.

Next, referring to FIG. 1, a case will be described in which the communication terminal 21 changes the call destination to the communication terminal 23 while making a call to the communication terminal 22. The central control unit 40 detects the call from the communication terminal 21 at the line position A via the interface 11, changes the data in the line status 52 area of the line position A of the main memory 50 from the empty state to the calling state, and The caller connects the accommodation line of switch terminal A to the register 30 via the main switch 10. The caller confirms that transmission is possible by listening to the dial tone, and requests a connection to the communication terminal 22. Dial 5678 or the pre-registered speed dial ■. The register 30 receives a terminal number 5678 or a speed dial ■ signal from the caller and forwards it to the central controller 40. The central control unit 40 searches for the terminal number 5678 in the area of the fixed data 53, confirms that the line status 52 for the line position B is empty, and changes the line status 52 for the line position B to the calling status ↓; Control is performed to transmit a paging signal to the communication terminal 22 and a ringback tone to the communication terminal 21.

Next, since there is no response from the communication terminal 22, in order to change the call destination to the communication terminal 23, the user dials the speed dial in which the terminal number 4321 of the communication terminal 22 has been registered in advance. The central control unit 40 receives the speed dial (2) through the register 30 and confirms that there has been a change in the calling destination.

At the same time, data is changed in the field of line status 52 for line position B from calling state to idle state, terminal number 4321 registered as speed dial ■ is searched in the field of fixed data 53, and line for line position C is The area of status 52 is searched to see if it is empty, and if it is empty, the controller changes the call destination.

〔Effect of the invention〕

As explained above, the extension calling device of the present invention allows a caller to send a speed dial in which the terminal number of another called party is registered while calling a certain called party from a multi-function terminal. By being able to change the destination, if the called party does not answer or dials by mistake, the destination can be changed not only to a called terminal that differs only in the final digit, but also to any called party that supports speed dialing. This has the effect of saving the time and effort of having to call again.

[Brief explanation of the drawing]

FIG. 1 is a functional block diagram showing an embodiment of the extension calling device of the present invention. 10... Main switch 11, 12, 13... Interface 21.22, 23... Communication terminal 30
...Register 40...Central control unit

Claims (1)

[Claims] (1) In an automatic exchange that has a service function for extension interconnection, it is possible for the calling party to send speed dialing in which the terminal number of another called party is registered while calling the called party from a multi-function terminal. What is claimed is: 1. An extension calling device for an automatic exchange, characterized in that it has means for searching for a terminal number corresponding to a pre-registered speed dial and changing the call destination to the searched terminal.