JPH11355451A - Connection control system in automatic exchange system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To release interruption to each attendant board on request of a privacy call. SOLUTION: An extension terminal 1 is provided with a privacy call request means that makes a privacy call request with a line to a line controller 4, and the line controller 4 is provided with a recognition means that recognize a privacy call request in a state that pluralities of parties make speeches between lines and pluralities of extension terminals 1 via conference trunks, a privacy call priority discrimination means that discriminates whether or not a privacy call is available of the extension terminal 1 releasing its speech among pluralities of the extension terminals 1 connected via conference trunks 7, and a privacy call processing means that invalidates the privacy call request when the privacy call propriety discrimination means discriminates a disabled privacy call and interrupts the extension terminal 1 being a speech release object when the discrimination means discriminates an available privacy call.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a confidential state connection control system in an automatic switching system.

[0002]

2. Description of the Related Art In a conventional automatic switching system, another extension terminal issues an interrupt request to a line which is in communication with an extension terminal connected to a line control device, so that the interruption extension terminal is issued. 2. Description of the Related Art An interrupt control method for performing a call between a device and a line has been performed. In addition, a secret talk control method is performed in which a secret talk request is issued from an arbitrary extension terminal apparatus, thereby prohibiting a call from being made to another extension terminal apparatus that is communicating with the line. Hereinafter, a connection control method of such a conventional automatic switching system will be described.

FIG. 7 shows a call terminal (DB) which is an extension terminal device.
Shows a state transition diagram of conventional DB processing and LCU processing of a call console and a line control unit (LCU) when interrupting an office line trunk during a call. In this case, it is assumed that a plurality of call consoles connected to the line control device are making a multi-party call via the conference trunk and the central office trunk. In this case, when a caller who is not on a call interrupts the busy trunk, the line button of the line requesting the caller's call is pressed. Then, the call console transmits the call information 302 to the line controller as the interrupt request 301. The call information includes TRK indicating the identification of the office line trunk.
Code is included.

[0004] The line controller performs a process 303 for determining whether or not an interrupt is possible. If interruption is possible, line lamp information 305 including an interruption start command and a TRK code in the communication terminal
Is sent. The extension terminal device that has received the line lamp information 305 performs the process of the line lamp control 306. Also,
The office trunk switches the connection point of the conference trunk to the connection point from the one that is already talking, connects the newly interrupted telephone to the conference trunk, and performs multi-party calls including the extension terminal equipment. Has been realized. If the interrupt is not possible, a busy tone (hereinafter referred to as "BT tone") is sent to the call terminal of the interrupt request
) 304 is transmitted.

FIG. 8 shows a state transition diagram of the DB processing and the LCU processing of the call console and the line controller in the conventional confidential communication control system. The interrupted caller DBA processes the privacy request 401 and sends the key information 4 to the line controller.
02 is sent. The line controller performs a process 403 of determining whether or not the talker DBA is capable of confidential talk. If not, the key information 402 is set to invalid 405. If confidential,
The confidential process 404 is performed, and the line lamp information 406 is sent to the other call terminals DBB to DBG that are interrupted.
At the same time, and a BT sound for prohibiting the call is transmitted.

[0006]

However, in the case of the above-mentioned conventional privacy control system, if at least one of the talkers whose interrupt is to be released is interrupted, all of the interrupts are made by the privacy operation of the talker DBA. There were many operational problems, such as the call stand being interrupted.

An object of the present invention is to solve the above-mentioned conventional problems and to provide an excellent privacy control connection control method capable of releasing an interrupt for each telephone call when a privacy request is made. And

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a line control device having a central office trunk connected to a line and a conference trunk for multi-party communication, and accommodated in the line control device. A plurality of extension terminal devices,
A connection control method in an automatic switching system in which the line and the plurality of extension terminal devices can perform a multi-party call via the conference trunk, wherein the extension terminal device has a secret talk of talking with the line. A privacy requesting unit for making a request to the line control device, wherein the line control device is configured to perform the privacy request in a state where the line and the plurality of extension terminal devices are communicating with each other via the conference trunk. Recognition means for recognizing, and when the recognition means recognizes the privacy request, among the plurality of extension terminal apparatuses connected to the plurality of parties via the conference trunk, it is determined whether or not the extension terminal apparatus to cancel the call is capable of privacy. The confidentiality availability determining means for determining and the confidentiality availability determining means invalidate the confidentiality request when confidentiality is disabled, and cancel the confidentiality request when determining that confidentiality is possible. A configuration that includes a privacy processing means for cutting the line terminal device.

Therefore, according to the present invention, it is possible to disconnect a call only to an extension terminal device that does not permit the privacy while maintaining a call of an extension terminal device that does not need to disconnect the call when performing the privacy process.

[0010] Further, the line control device determines the privacy connection based on the privacy identification information from the extension terminal device requesting the privacy, so that the line control device is individually determined by the privacy identification information with respect to the other extension terminal devices during the call. Can perform a confidential talk prohibition process.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a system configuration in this embodiment. In FIG. 1, a line controller (LCU) 4 corresponding to an ISDN includes a line circuit (LIN).
2, a plurality of extension terminal devices (DB) 1 are connected. These extension terminal devices 1 and a switching public network (hereinafter, referred to as a "switching network") are connected by a central office trunk (COT) 5 and a private trunk (PVT) 6, and the extension terminal device 1 and the switching network are line control devices. Under the control of the communication path switch (NW) 3 in the (LCU) 4, any connection can be made and communication is possible. In addition, a plurality of extension terminal devices 1 are connected to a trunk of a switching network (in the case of the present embodiment, a central office trunk 5).
(Hereinafter, referred to as a “talking station”), a call is made via the conference trunk (CFT) 7 to make a call.
And the local trunk 5 are connected.

FIG. 2 shows an example of an external view of the call console 1 accommodated in the automatic switching system. A display (LCD) 102 and lines (COT and PV)
T) and line button 1 that accommodates one-touch auto dial
03, a numeric keypad 105 and the like are mounted, and two handsets 106 are provided for making a call.
Further, in realizing the present invention, the call stand 101 is provided with an interrupt extension display button 107 among the function buttons.
It is possible to display the extension number under call at 02.

FIG. 3 shows a connection diagram in which a plurality of call consoles 201 to 207 are connected to a central office trunk 5 connected to one line of a switching network to make a call. These seven call terminals 201 to 207 are connected to the central office trunk 5 via the conference trunk 7. The eight terminals of the speech path switch connected to the conference trunk 7 are connected to the conference trunk connection point Nos. 210, and numbers 1 to 8 are assigned.

In FIG. 3, a plurality of call stations 201 to 207 are connected to each other via a central office trunk 5 and a conference trunk 7 by way of an eight-party system. A method in which the call desk 208 knows the extension number during a call with the central office trunk 5 during a call will be described with reference to the state transition diagram of FIG. 4 and the display contents of FIG.

After the user presses the extension button 107 at the call desk 208, the trunk line 5 during the call is pressed.
When the line button 103 is pressed, the D on the call desk 208 shown in FIG.
In the B process, it is determined that the request is for a telephone extension number request 307, and the number request information 308 is sent to the line controller 4 instead of the call information 302. The number request information includes a number display command and a TRK code which is identification information of the office line trunk. The line controller 4 identifies whether or not the talking mode is the secret mode. If the mode is not the talking mode, the line controller 4 sends all the connected extension number information 301 to the calling desk 208 which has requested. Is sent.
It should be noted that the telephone extension number information 310 during the call includes the conference trunk connection point No. 210 is also included,
08, the LCD display control 311 causes the conference trunk connection point No. on the display 314 as shown in FIG. The extension number 316 during a call can be displayed corresponding to (1 to 8) 315.

If the line during the call is in a secret state at the identification 309 in FIG. 4, the line control device 4 sends the secret mode information 312 to the requested call terminal, and displays the extension on the display of the received call terminal. No numbers are displayed.

In this embodiment, in combination with the interrupt extension display function, the method of interrupt release (private conversation function) is given a degree of freedom, and the function is remarkably improved.

FIG. 6 is a state transition diagram of the privacy control system.
5 shows a state transition diagram after the interrupt extension number shown in FIG. 5 is displayed on the display 314 by the interrupt extension number display function. In this case, “*” added to the end of the displayed extension number is identification information indicating an extension number that can be secretly spoken.

In FIG. 6, the caller DBA checks the extension number of the caller who is interrupting on the display, and, for example, when canceling the call inhibition interrupt for only the caller DBG, the corresponding conference shown in FIG. Trunk connection N
O. 315 is designated, and then a privacy request 408 is made. The line control device 4 performs a process 410 of determining whether or not confidential communication is possible based on the key information 409 from the call desk DBA, and invalidates the key information 409 if it is not possible. Also, if possible, confidentiality processing 411 is performed, and line lamp information 413 is transmitted only to the communication desk DBG corresponding to the connection point NO of the key information 409, and a BT sound for prohibiting communication is transmitted. The interrupt release function is realized with respect to the call stand.

[0021]

According to the present invention, it is possible to arbitrarily release the interrupt for each intercepting call station, and to make a call only at an appropriate call station, thereby significantly improving the secret talk function.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a system configuration according to an embodiment of the present invention.

FIG. 2 is an external view of an extension terminal device (talk terminal) used in the present embodiment.

FIG. 3 is a connection diagram in an interrupt state for explaining the present embodiment.

FIG. 4 is a state transition diagram of interrupt control in the embodiment.

FIG. 5 is a display example of a list of interrupt extension numbers displayed on a display of the call stand of FIG. 2;

FIG. 6 is a state transition diagram of the confidential talk control method in the embodiment.

FIG. 7 is a state transition diagram of interrupt control in a conventional example.

FIG. 8 is a state transition diagram of a secret talk control system in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Extension terminal device 4 Line control device 5 Central office trunk 7 Conference trunk

Claims (1)

[Claims] 1. A line control device having an office line trunk connected to a line and a conference trunk for multi-party communication, and a plurality of extension terminal devices accommodated in the line control device,
A connection control method in an automatic switching system in which the line and the plurality of extension terminal devices can perform a multi-party call via the conference trunk, wherein the extension terminal device has a secret talk of talking with the line. A privacy requesting means for making a request to the line control device, wherein the line control device has the privacy request in a state where the line and the plurality of extension terminal devices are in a multi-party call via the conference trunk. Recognition means for recognizing, and when the recognition means recognizes the privacy request, among the plurality of extension terminal apparatuses connected to the plurality of parties via the conference trunk, it is determined whether or not the extension terminal apparatus to cancel the call is capable of privacy. The confidentiality availability determining means for determining and the confidentiality availability determining means invalidate the confidentiality request when confidentiality is disabled, and cancel the call when the confidentiality is possible. Connection control method in an automatic switching system, characterized in that a privacy processing means for cutting the extension terminal device.