KR0171301B1 - Digital network - Google Patents

Abstract

The present invention relates to a message waiting method of a digital local exchange.

In the conventional DID digital local exchange, when an external subscriber calls an internal subscriber of a simple exchange, when the subscriber is absent or busy, the external subscriber hangs up and then calls another internal subscriber to call his / her own phone number. There was an uncomfortable problem of having to call and ask to contact or later call back to the desired extension subscriber.

Therefore, the present invention is to improve the problems of the prior art described above, when the trunk line user who calls by DID method does not make a call with the internal subscriber of the desired simple exchange, the caller records the calling party number provided by the digital local exchange in the simple exchange. By remaining in the waiting list of each station, the remaining waiting trunk line numbers are displayed on the liquid crystal display together with the date and time information so that the valid station subscribers can be easily known, and are automatically dialed by the user's request.

Description

How to Wait for Trunk Line Message in Digital Local Exchange

1 is a block diagram of a digital local exchange for implementing the present invention.

(A) and (b) of FIG. 2 are detailed views of the key-phone terminal in FIG.

(A) and (b) of FIG. 3 are memory management and record structure diagrams for standby line processing according to the present invention.

(A) to (c) of FIG. 4 are record structure diagrams in accordance with the allocation and return order of standby station records according to the present invention.

5 is a flowchart of a trunk line message waiting process of a digital local exchange according to the present invention.

* Explanation of symbols for main parts of the drawings

100: simple exchanger 200 ~ 220: key phone terminal

201: Keyphone Central Processing Unit 202: LCD

203: handset, handset 204: keypad

The present invention relates to a simple exchange, and in particular, when the simple exchange is connected to a digital local exchange (ISDN, E1, T1) by internal subscriber direct call (hereinafter abbreviated as DID), an external subscriber is absent or When calling an internal subscriber in a call, the external subscriber calls another internal subscriber to call his or her number, or solves the problem of having to try again later, so that the Simple Switching System automatically receives information about the CO line message. The present invention relates to a method of waiting for a message in a digital CO switch that automatically provides a subscriber to an extension and automatically calls a corresponding CO line with a simple operation.

In the conventional DID digital local exchange, when an external subscriber calls an internal subscriber of a simple exchange, when the subscriber is absent or busy, the external subscriber hangs up and then calls another internal subscriber to call his / her own phone number. There was an uncomfortable problem of having to call and ask to contact or later call back to the desired extension subscriber.

Therefore, the present invention is to improve the problems of the prior art described above, when the trunk line user who calls by DID method does not make a call with the internal subscriber of the desired simple exchange, the caller records the calling party number provided by the digital local exchange in the simple exchange. By remaining in the waiting list of each station, the remaining waiting station numbers are displayed on the LCD display with the date and time information so that the valid station subscribers can easily know them, and the message of the digital local exchange is automatically dialed by the user's request. To provide a waiting method.

The process for achieving the above object of the present invention is stored on the call of the caller of the CO line call in the call waiting state of the extension in the receiving state of the simple switch, and displayed on the LCD of the extension subscriber after the call is stored on the extension subscriber A message waiting process for waiting for input of a message, a waiting message searching process for displaying each waiting message currently stored as the corresponding subscriber checks a message displayed on the LCD and selects a search button, and the corresponding subscriber is displayed on the LCD. If you check the displayed message and execute the corresponding CO line number, the CO line call process connects the currently displayed CO line number to connect the call, and if the corresponding subscriber wants to check and delete the message displayed on the LCD, delete the currently displayed message, and then click Next. After displaying the message, the process of deleting the returned message Characterized in that made.

In the message waiting process, the contents of the call are allocated to a corresponding station subscriber to record whether or not there is a current waiting trunk line, the date and time the trunk line is waiting, and the telephone number of the station. It is characterized by displaying.

The waiting message search process may include searching for the next waiting message number when the corresponding subscriber selects a down button, comparing the next waiting message number selected by the extension subscriber with the number of waiting messages, and then selecting the next waiting message. In this case, the method comprises the steps of displaying the result on the LCD and returning to the user input waiting state, and if there is no waiting message selected by the extension subscriber, initializing the waiting message and returning to the user input waiting state.

In addition, when the user checks the message displayed on the LCD and selects the hold / save button, the trunk line call process loads the currently displayed trunk line number into the redial memory, and the trunk line number loaded into the redial memory. It is characterized by consisting of a step of performing a redial by occupying, and connecting the trunk line call after performing the redial.

The process of deleting the waiting message may include returning a record in which the current waiting message is stored to the system memory area when the corresponding subscriber selects the redial button, changing the presence of the current waiting line, and reducing the number of waiting trunk lines. After that, if there is no remaining number of remaining CO lines, it is characterized in that the step of returning to the initial state.

As shown in FIG. 1 and FIG. 2, the present invention is constructed with a central processing unit having a trunk line ring and a call signal transmitted and received through a tip (T) and a ring (R) terminal. Control the call with each terminal and control each record in the built-in memory (not shown) to process the standby trunk line record, and the control of the simple switch 100 It is composed of a plurality of key phone terminals (200 ... 220) to communicate with the CO line or the extension and notify the user of the waiting CO line message sent from the simple switch 100.

Here, each key phone terminal 200 ... 220 connects a voice signal transmitted and received with the simple switch 100 through a transmitter and a receiver 203 and detects a button selected by an extension subscriber through the keypad 204. A keyphone central processing unit 201 for performing a corresponding function and processing a trunk line message sent from the simple switch 100 and the air sent from the simple switch 100 under the control of the key phone central processing unit 201. And a liquid crystal display (LCD) 202 for notifying the user of the message.

The operation and effects of the present invention configured as described above will be described in detail with reference to FIGS. 1 to 5.

First, a of FIG. 3 is a control diagram of a memory built in the simple switch 100 and used by a main memory for standby trunk line processing, and b of FIG. 3 is an embodiment of a standby trunk line record recorded in the memory. As shown in the figure, each time a CO line is queued, one record is assigned to the corresponding station, and the assigned record is displayed on the LCD 202 of the corresponding station and used for speed dialing after message retrieval. Upon request, it is returned to the system memory area and can be allocated to another station.

For this purpose, the simple exchange has a variable of the start number (FREE_RECORD_INDEX) of the record that can be currently allocated, and its initial value is '0'.

In addition, the variable CO_MSG_WAIT_RECORD_INDEX has an initial value of '-1', which means that there is no currently waiting CO line.

Figure 3b is a structural diagram of the record assigned to the station, where the first field has the index of the next record linked by a link, and if the value is '-1', there is no next record, and other values indicate the index of the next record. it means.

The second and third fields indicate the date and time when the CO line is waiting.

The fourth field is used to record the telephone number of the waiting CO line. It stores up to 20 packet types.

A to c of FIG. 4 are structural diagrams of a memory area according to standby line record allocation and return, and FIG. 5 is a flowchart of a message waiting process of a digital local exchange according to the present invention. If the call is on hook after the extension of the subscriber station of the human exchange 100, the trunk line is allocated to the message waiting list and returned after completion of use. If a duplicate trunk line number ends, only the waiting date is changed to the latest without re-allocation. Let's do it.

That is, FIG. 4A shows an initial state FREE_RECORD_INDEX = 0 of the standby CO line record, in which case there is no standby CO line assigned to the record.

The following is a case where there is one waiting station line, that is, when one record is assigned to station 100 as shown in FIG. 4B, station 100 changes CO_MSG_WAIT_RECORD_INDEX to '0' and the next record in record '0'. The value of the field indicating '1' becomes '-1' so that when a subscriber of extension 100 sees a call, the call came from the trunk number '0343507955' at 15:25 on June 14th.

In this way, the waiting lines look up / operate the corresponding subscribers by viewing the message displayed on the LCD 202 of the keypad terminal 200 ((b) of FIG. 2). If you select the DOWN button to check the LCD 202 on the 200 and check other CO line waiting messages, 'Curruent_Message_Index' is 1 indicating the number of records of the waiting line currently displayed on the LCD 202. If the current waiting trunk line message remains compared to the number of waiting trunk lines 'Number_Of_Total_Message' after increasing, the next waiting trunk line message is displayed on the LCD 202 and then waits for a key input of the subscriber.

If the current waiting station line message is the last waiting station line message, the current waiting station line message is displayed on the LCD 202 and 'Current_Message_Index = 0', that is, the waiting station line index is initialized. waiting.

In addition, the station subscriber selects the hold / store button when he / she checks the waiting station line message left on the LCD 202 of his key phone terminal 200 and calls the person who left the message.

The simple switch 100 detects this, copies the CO line number in the 'Current_Message_Index' record into the redial memory, and then performs redial by occupying the CO line.

As the extension subscriber connects the trunk line call by the simple exchange and on-hooks after the call, the simple exchange returns to the initial reception standby state.

That is, when the extension subscriber presses the save / hold button, the simple switch 100 automatically calls the trunk line number (record indicated by Current_Message_Index) currently displayed on the LCD 202 through speed dialing, so that the corresponding subscriber is simple. It is possible to talk with CO line that is waiting.

At this time, when the station subscriber and the called CO line make a normal call, the system automatically deletes the CO line record in the waiting list and returns it to the system.

In addition, when the extension subscriber checks the waiting message displayed on the LCD 202 of his keypad switching unit 200 and wants to delete it, the extension subscriber selects the redial button.

The simple switch 100 detects this, deletes the CO line record indicated by 'Current_Message_Index' in which the current waiting message is recorded, returns it to the system, and then changes the 'CO_MSG_WAIT_RECORD_INDEX'.

In addition, the number of waiting CO lines is reduced by 1, and the message is confirmed as the last CO line waiting message, and it returns to the initial reception waiting state.

Here, the process at the time of returning the record assigned to the waiting station to the system as shown in c of FIG. 4 is as follows.

1.TEMPORARY_INDEX = the value of FREE_RECORD_INDEX (here 1)

2. FREE_RECORD_INDEX = CO_MSG_WAIT_RECORD_INDE for extension 100

X (0)

3. CO_MSG_WAIT_RECORD_INDEX = on extension 100

Next record value (-1) in CO_MSG_WAIT_RECORD_INDEX

4.Next record of FREE_RECORD_INDEX (0) = TEMPORARY_INDEX

5. CO_MSG_WAIT_RECORD_INDEX = -1 on extension 100

As described above, the present invention uses the caller ID provided by the digital local exchange, and the simple exchange automatically provides the subscriber with the information on the trunk line message and automatically provides the trunk line with a simple operation. By invoking, it has the following effects:

First, there is no hassle of having to transfer a non-responsive or call-centered operator in response.

Second, when a station subscriber calls a station, the call can be easily called as a speed dial instead of dialing the line number.

Third, the caller does not need to keep checking until the called party becomes valid.

Fourth, an extension subscriber can selectively reply after checking a list of queued lines.

Claims (5)

In the receiving standby state of the simple switch, the call waiting process of the station subscriber is stored in the on-hook of the trunk line caller and displayed on the LCD of the station subscriber. As the subscriber checks the message displayed on the LCD and selects the search button, the standby message search process displays each currently stored waiting message, and if the corresponding subscriber checks the message displayed on the LCD and executes the corresponding CO line number, The CO line call process of connecting a call by dialing the displayed CO line number, and when the corresponding subscriber wants to check and delete the message displayed on the LCD, deletes the currently displayed message, displays the next message, and then returns the message. The menu of the digital domestic exchange featured How to wait. The method of claim 1, wherein, in the message waiting process, the contents of the call are allocated to a corresponding memory subscriber to record whether there is a current waiting trunk line, the date and time of waiting for the trunk line, and a telephone number of the waiting trunk line, respectively. Message waiting method of a digital local exchange characterized in that displayed on the LCD of the station subscriber. The method of claim 2, wherein the waiting message search process comprises: searching for a next waiting message number when the corresponding subscriber selects a down button, comparing the next waiting message number selected by the extension subscriber with the number of waiting messages; If there is a next waiting message, it is displayed on the LCD and returned to the user input waiting state, and if there is no waiting message selected by the subscriber as a result of the comparison, initializing the waiting message and returning to the user input waiting state. A message waiting method of a digital local exchange. The method of claim 1, wherein the C.O.line call process checks a message displayed on the LCD and selects a hold / save button to load the currently displayed C.O.line number into a redial memory and to load the redial memory. A method of waiting for a message in a digital local exchange comprising the steps of performing a redial by occupying a CO line number which has been entered, and connecting a trunk line call after performing a redial. The method of claim 1, wherein the deleting of the waiting message comprises returning a record in which the current waiting message is stored to the system memory area when the corresponding subscriber selects the redial button and changes whether the current waiting line is present or not. A method of waiting for a message in a digital local exchange comprising the step of returning to an initial state if there are no remaining waiting lines after reducing the number of trunk lines.