KR950004412B1 - How to change the temporary call destination designation of key phone system - Google Patents

Abstract

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Description

How to change the temporary call destination designation of key phone system

1 is a system block diagram for carrying out the present invention.

2 is a flow chart in accordance with the present invention.

* Explanation of symbols for main parts of the drawings

10: Romans 20: Ram,

30: first central processing apparatus 40: main subscriber line circuit

50: trunk circuit 60: switching circuit

70: first interface circuit 80: second central processing unit

90: second interface circuit 100: third interface circuit

110: LCD display unit 120: key matrix

130: hook switch 140: speakerphone

150: handset 160: toneringer

The present invention relates to a method for temporarily changing a call destination designation in a key phone system. Particularly, when a reserved call is received when a reserved call is received, the user can easily make a call to the PABX. It is about how to change the destination designation.

In general, the call designation of CO line in keyphone system is designated as a specific extension or group of stations, and the station excluded from call designation at CO line cannot easily know whether the corresponding line is called or not. Rings often ring to other extensions or groups, and in particular, hybrid keyphones have been unable to reserve BEHIND PABX trunk lines in general telephone extensions.

Accordingly, it is an object of the present invention to provide a method for reserving a CO line by changing a call destination designation of a general telephone subscriber in a key phone system.

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

FIG. 1 is a block diagram of a key phone system according to the present invention, and includes a ROM 10 having programs and fixed service data for performing functions of the system, each service class, system mode, programs, and data. A RAM 20 used as a processing area for temporarily storing processed data, a first central processing device 30 for controlling call switching and providing various services, and a transmission line Ll-Ln. Main Subscriber Circuit 40, which is connected to the station subscriber to transmit voice and data, and Trunk Circuit, which is connected to the trunk line, compensates for ring detection, pulse transmission, overvoltage protection and switching loss. 50, the switching circuit 60 for forming a communication path between the trunk circuit 50 and the main subscriber circuit 40, the trunk circuit 50 and the switching circuit 60 and the main subscriber circuit ( The first interface circuit 70 for smoothly inputting / outputting control data between the 40 and the first central processing apparatus 30 corresponds to the main device KMS of the key phone system, and processes a command according to a key input. The second central processing unit 80, which controls the circuit unit, displays the ring transmission and various functions, processes the transmission and reception data, and interfaces the power supplied from the main subscriber circuit 40 of the main unit KMS to each circuit unit. Voice of the second interface circuit 90 for relaying data between the main subscriber circuit 40 of the main device KMS and the second central processing unit 80, and the main subscriber circuit 40 of the main device KMS. A third interface circuit 100 for relaying a call, a key matrix 120 connected to the second central processing unit 80 to input a dial and a key command, and a connection to the third interface circuit 100 To make money Device 150 is connected to the third interface circuit 100 in a hook on state, 150 in a hook on state, and is connected to the third interface circuit 100 in a hook on state. Speaking phone 140 to enable the call, tone ringer 160 to generate an incoming signal, dialing number, during an extension call, the other party number, CO line number of the CO line connection, call pending, reservation, call rejection LCD display unit 110, and a hook device (KSS) consisting of a hook switch (Hook Service) 130 for controlling the connection with the transmission line in accordance with the state of the handset 150.

2 is a flow chart according to the present invention, which analyzes the received data to search for the presence of a dormant state, and checks whether the dormant temporary trunk line service or extension service state is in the dormant state search process, and the service state If the call forwarding key is entered during the extension service during the inspection process, accepting the trunk line number and storing the extension number in the call forwarding table; and if the call forwarding table is not empty when the trunk line service is in the service status check, After the call is sent to the extension, the extension number is removed, and when the incoming call change key is input to the call line with the trunk line in the idle state search process, the extension number is stored in the incoming call change table.

Based on the above configuration, a preferred embodiment of the present invention will be described in detail with reference to FIG.

Referring to the general functions of the main device KMS and the sub device KSS of FIG. 1, the main device KMS detects an incoming signal from the trunk line and transmits the incoming signal data to each sub device KSS.

At this time, it not only announces incoming calls, but also transmits data to control various lamps. Also, it receives data of various buttons from the auxiliary device (KSS) and makes a call of the trunk line and other auxiliary device (KSS) receives various data from the main device (KMS). Turn on / off the lamp, LED, turn on / off various beeps, check the pressed button and transmit the data of the input button to the main device (KMS) to receive various services from the main device (KMS) .

Referring to FIG. 2 in conjunction with FIG. 1, FIG. 2 is a flowchart performed by the first central processing unit 30 of the main unit KMS, and the first central processing unit 30 is the first unit of the subsidiary unit KSS. 2, the central processing unit 80 detects the state of the hook switch 130, or inspects the key matrix 120 to check the first interface circuit 70, the transmission line Ll, the main subscriber line circuit 40, The data sent through the one interface circuit 70 is analyzed to determine what state each sub-device KSS is in. In step 2a, it is checked whether the sub-device KSS is at rest.

In the idle state in step (2a), the first central processing apparatus 30 checks whether the trunk line service state is performed. If the trunk line service state is performed, performs the step (2C). Check it.

If the extension service state is in step (2g), in step (2h) the first central processing device through the above-described path to the data read from the second central processing device (80) through the key matrix 120 It is checked whether the data sent to (30) is the incoming call change button. If it is not the incoming call change button in the step (2g), if the incoming change button is changed to the process of accepting the CO line number by temporarily knowing that it is a request to temporarily change the incoming call of the CO line, and proceeding to the second center through the path described in the step (2i). It is checked whether the data sent from the processing device 80 to the first central processing device 30 is the CO line number. If it is the wrong CO line number in step (21), it is finished. If it is the correct CO line number, step (2i) specifies the extension number in the incoming call change table of the corresponding CO line.

In step (2a), if it is not in the idle state, (2k) checks whether the call is in progress with the CO line, if not in communication with the CO line, and in case of the call with the CO line, in step 21, the KSS is connected to the key matrix ( It is checked whether the data read from the second central processing apparatus 80 through the 120 is sent to the first central processing apparatus 30 through the above-described path as the incoming call change button. At this time, if the incoming call change button is not finished, the incoming call change button knows that it is a request to temporarily change the incoming call of the currently busy line, and then proceeds to step 2j. In step (2j), the extension number is stored and terminated in the incoming call change table of the call.

In addition, when the trunk line service state is in step (2b), the first central processing unit 30 detects a ring on the trunk line side through the trunk circuit 50 in step (2C) to check whether the trunk line is received. In the step (2C), if the incoming call is not received, the call is terminated. If the call is received, the first central processing unit 30 reads the contents of the incoming change buffer of the incoming call in step (2d) from the RAM 20 to receive the corresponding call. Check that the change buffer is empty.

If the incoming call change buffer of the corresponding CO line is empty in step (2d), the incoming ring rings and ends according to the original incoming call designation table.

However, if the incoming call change table of the corresponding trunk line is not empty in step (2d), the second central processing unit 80 and the subscriber line circuit 40 are connected to the oldest station among the extension numbers included in the call change buffer in step (2f). It transmits data to ring through the transmission line (Ll-Ln) of the second interface circuit 90, and removes the corresponding extension number from the incoming call change table.

At this time, the second central processing apparatus 80 receiving the ring data connects the tone ringer 160 to the speakerphone circuit 140 using the third interface circuit 100 to notify that the trunk line is received by ringing the ring.

As described above, the present invention allows subscribers (ie, subscribers) of key phones to temporarily change incoming calls of CO lines, so that incoming calls of CO lines are not designated in key phones used in BEHIND PABX, especially hybrid phones. There is an advantage that can make reservation of PABX trunk line at extension.

Claims (1)

A method for temporarily changing a call destination designation in a key phone system, the method comprising: analyzing a received data and searching for a state of dormancy; and checking whether an idle state temporary trunk line service or an extension service state is authorized in the dormant state search process; If the incoming call change key is entered during the extension service in the service status check process, accepting the trunk line number and storing the extension number in the incoming call change table; and if the incoming call change table is not empty during the call service during the service state check, the incoming call change Removing the extension number after sending the ring to the extension of the table, and storing the extension number in the call forwarding table if the incoming call change key is entered during the idle state search process instead of the idle state. Characterized by the above.