KR20000021325A - Method for automatically re-dialling of simple exchange system - Google Patents

Abstract

PURPOSE: A method for automatically re-dialing of a simple exchange system is provided to connect a telephone line capable of calling, by automatically re-dialing next telephone number in order, if the telephone line is being used, when an extension subscriber tries to call to an outer subscriber having multiple telephone lines. CONSTITUTION: A method for automatically re-dialing of a simple exchange system comprises the steps of: storing a start telephone number and appointed redial frequency for an outer subscriber having multiple telephone numbers, by receiving from an extension subscriber; confirming whether the line of the outer subscriber is busy, by trying speech path connection to the outer subscriber by dialing the start telephone number; increasing a last number of the start telephone number by '1', when the line is busy, repeating the produced telephone number until the speech path connection is completed, automatically re-dialing as the automatic re-dialing frequency in maximum.

Description

Automatic Redial Method of Simple Exchange System

The present invention relates to a simple switching system, and in particular, when an extension subscriber dials an external subscriber having multiple telephone numbers and attempts to make a call, an extension is automatically connected to a callable line of a multiple telephone line of the other party. The present invention relates to an automatic redialing method of a simple exchange system that provides a better call service to a subscriber.

In general, the simple exchange system accommodates a plurality of extension subscribers and performs a function of connecting a call path so that an extension call and a trunk line call can be made to the corresponding subscriber. However, when an extension subscriber attempts to make a call to an external subscriber having one or more telephone lines, the conventional simple switching system connects to a call because only the specific telephone line dialed by the extension subscriber tries to make a call. If a specific telephone line is busy, the extension subscriber has to redial another telephone number repeatedly until a call is established.

The present invention has been made to solve the above-mentioned problems, and when the extension subscriber attempts to make a call to an external subscriber having multiple telephone lines, the telephone number of the dialed telephone number is automatically used. It provides an automatic redial method of the Simple Switching System that allows the subscriber to eliminate the inconvenience of manually redialing multiple telephone numbers in order to attempt to make a call by automatically redialing the telephone lines sequentially. There is a purpose.

A feature of the present invention for achieving the above object is, in the automatic redialing method of a simple switch system, receiving a starting telephone number and a specified number of redials for an external subscriber having multiple telephone numbers received from an internal subscriber A first process of doing; A second step of confirming whether the external subscriber is busy by attempting to connect to a call to an external subscriber by dialing the starting telephone number; If the external subscriber is busy, the telephone number calculated by increasing the last digit of the starting telephone number by "1" is automatically and automatically redialed repeatedly until the connection to the call is completed. As long as the automatic redial includes a third process.

1 is a block diagram of a simplified exchange system according to an embodiment of the present invention.

2 is a flow diagram illustrating automatic redial operation of a simplified exchange system in accordance with an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: simple exchange system 11: station interface unit

12 memory unit 13 central processing unit

14: currency loss switching unit 15: CO line interface unit

Hereinafter, with reference to the accompanying drawings an embodiment of the present invention will be described in detail.

As illustrated in FIG. 1, the simplified exchange system 10 according to the embodiment of the present invention includes an extension interface unit 11, a memory unit 12, a central processing unit 13, and a call switching unit ( 14) and the trunk line interface unit 15.

The station interface unit 11 connects stations to match signals input and output to and from the station, and the memory unit 12 stores operation programs and user input data.

In addition, the central processing unit 13 is operated in accordance with the operation program stored in the memory unit 12 to control the operation of the entire system, such as monitoring of the call in the simple switchboard system 10, control of the call path connection, and the memory unit ( Based on the comparison between the preset number of redials provided from 12) and the number of automatic redials performed, a call to an external subscriber is attempted to the next telephone number sequentially connected to the telephone number that attempted the call.

In addition, the call switching unit 14 performs a channel switching operation between the station interface unit 11 and the trunk line interface unit 15 under the control of the central processing unit 13 to form a call path for the subscriber. The trunk line interface unit 15 matches the signals input and output through the trunk line.

The operation of the simple exchange system 10 according to the present invention configured as described above will be described with reference to FIG. 2.

When an extension subscriber connected to the simple switchboard system 10 attempts to make a call to an external subscriber who uses a multi-phone number, the start-up telephone number of the multi-phone number is entered, and the next consecutively followed by the start telephone number. The number of automatic redials for attempting to connect by telephone to the telephone number is input and stored in the memory unit 12 (step S1).

At this time, by inputting a combination of buttons such as '#' (or '*') and the number buttons installed on the extension telephone, the multi-number automatic redial function is set. For example, the external subscriber's telephone number is 123-1001. In order to set up the automatic redialing function for multiple numbers, such as, 1002, 1003, 1004, 1005, "Start phone number (123-1001) + '#' (or '*') + number of redials (4) Enter something like "

Accordingly, the central processing unit 13 connects the trunk line occupied via the trunk line interface unit 15 to the subscribers by the call switching unit 14 and then based on the starting telephone number input to the memory unit 12. Attempt to make a call to the external subscriber's side (step S2).

At this time, the central processing unit 13 determines whether the external subscriber is busy by checking whether a busy tone is applied from the external subscriber (step S3), and if the external subscriber is not busy, When the corresponding external subscriber responds, the extension subscriber and the external subscriber can make a call by occupying the call path for the external subscriber (step S4).

In addition, when the external subscriber is on the phone in step S3, the central processing unit 13 stops the connection attempt by the call to the external subscriber (step S5), and the last number of the start telephone number stored in the memory unit 15. Is increased by " 1 " (step S6), and the number of executed automatic redials is preset by comparing the number of preset redials stored in the memory unit 12 with the number of executed automatic redials (step S7). If the number of redials has not been reached, the automatic redialing of the telephone number calculated in step S6 (step S7) is returned to the step S3 to repeat the operation.

On the other hand, in step S7, the preset number of redials is compared with the number of automatic redials performed, and when the number of executed automatic redials reaches the predetermined number of automatic redials, the operation ends.

As described above, the present invention automatically redials the next consecutive telephone number when an external subscriber's telephone line is in use by the extension subscriber, thereby quickly using an unused line among multiple subscriber telephone lines. Since it connects with the extension subscriber, there is an advantage that the user can eliminate the inconvenience of manually redialing multiple phone numbers.

Claims (1)

Claims [1] An automatic redial method of a simple switch system comprising: a first step of receiving and storing a starting telephone number and a designated number of redials for an external subscriber having multiple telephone numbers from an extension subscriber; A second step of confirming whether the external subscriber is busy by attempting to connect to a call to an external subscriber by dialing the starting telephone number; If the external subscriber is busy, the telephone number calculated by increasing the last digit of the starting telephone number by "1" is automatically and automatically redialed repeatedly until the connection to the call is completed. And a third process of automatically redialing as much as possible.