JPH06232974A - Holding release system from held party in private branch exchange - Google Patents

Abstract

PURPOSE:To obtain the holding release system from a party side to be held in the private branch of exchange in which the service functions by talking holding are fulfilled by enabling in such a way that a terminal equipment of a party side to be held makes a holding release request to a terminal equipment of holding party. CONSTITUTION:When multi-function telephone sets MKT-A and MKT-B are taking with each other and the MKT-A holds once the taking, the operator of the MKT-B recognizes the holding state by a holding tone sent from a holding tone transmission circuit HLT. The holding state is released by the intention of a party to be held and when the called party desires to call a holding party (multi-function telephone set MKT-A), the MKT-B makes holding release operation to send a holding release request to a CPU. The CPU receiving the request throws an HS of the MKT-A to the position of SPK and controls the SPK so that a voice signal from the MKT-B is sounded from the SPK of the multi- function telephone set MKT-A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange, and more particularly to a system for releasing a hold from a person to be held in a private branch exchange.

[0002]

2. Description of the Related Art FIG. 4 is a block diagram showing an example of the configuration of a conventional private branch exchange. Multi-function telephones MKT-A and MKT-B are extension terminals of the private branch exchange, respectively, and are private via an interface circuit (LC). Switch path switch (T
SW). In addition, multi-function telephone MKT-
B has a minimum dial button, some service function buttons and a handset (HS), and the multi-function telephone MKT-A has a speaker calling circuit (SPK).
And a multifunctional telephone having an HS / SPK switching circuit (SPSW).

FIG. 4 shows a multi-function telephone MKT-A,
MKT-B indicates a communication path during extension mutual call, and the transmission channel of the multi-function telephone MKT-B is connected to the reception channel of the multi-function telephone MKT-A, and the reception of the multi-function telephone MKT-B Multi-function telephone MKT-A for channel
The outgoing channel is connected. From this state, for example, when the multi-function telephone MKT-A wants to hold the call,
A hold request signal is sent to the central control unit (CPU) by a button operation (for example, pressing the "hold" button) on the board of the multi-function telephone MKT-A or a predetermined special number operation for holding.
When the central control unit CPU receives this hold request signal,
Multi-function telephone MKT-B via the call path switch TSW
The transmission channel of the hold sound transmission circuit (HLT) is connected to the reception channel of. The hold sound sending circuit HLT sends a hold sound to the multi-function telephone MKT-B to notify that it is on hold (in FIG. 4).

Next, the return from the hold state to the call state is
The central control unit C is operated by operating a button on the surface of the multi-function telephone MKT-A (for example, pressing the "hold" button again) or a special number operation.
Sends a hold release request signal to the PU and sends the central control unit CP
U is a multi-function telephone M again via the speech path switch TSW
This is realized by connecting the transmission channel of the multi-function telephone MKT-B to the reception channel of the KT-A and connecting the transmission channel of the multi-function telephone MKT-A to the reception channel of the multi-function telephone MKT-B ( Return to in Fig. 4). FIG. 5 is a sequence diagram showing the above series of operations. Figure 5
The sequence of ~ in Fig. 4 corresponds to the communication path of ~ in Fig. 4.

[0005]

However, in such a conventional technique, the held person to be put on hold is unilaterally kept waiting, and when the person is not reconnected, the person to be held does nothing but disconnect the call. It was not possible to do so, and it was very inferior to the held person.

That is, for example, in the hold state, unless the multi-function telephone MKT-A, which is the hold person, is in a call with a third party, the path is terminated by the call path switch TSW and the multi-function person who is the hold person. The telephone MKT-B is connected to the hold tone sending circuit HLT. At this time, the hold state can be released only from the multi-function telephone MKT-A,
It was impossible from the multi-function telephone MKT-B. As described above, in the conventional hold service, even if the multi-function telephone MKT-B on the hold side is not connected to the third party's telephone or the hold person forgets to put on hold, the multi-function telephone MKT-B. There was a problem that the holdee would wait forever unless the hold was released from A.

The present invention eliminates the drawbacks of the prior art and enables the holdee side terminal to make a hold release request to the holdee side terminal, thereby enhancing the service function in call holding. It is an object of the present invention to provide a hold release method from the holdee side in an exchange.

[0008]

In order to solve the above problems, the present invention provides a private branch exchange having a call holding service function for holding a call during a call, when a hold release request is received from a held terminal. It has a function of notifying the holder side that there is a hold release request.

It should be noted that the term "private branch exchange" used in this specification usually includes not only the concept thereof but also an exchange processing device such as a main unit of a button telephone system.

[0010]

According to the present invention, in the private branch exchange, when the first extension terminal and the second extension terminal accommodated in the private branch exchange receive a call holding request from the first extension terminal during a call, the second extension terminal Hold and receive a hold release request from the second extension terminal,
The first extension terminal is notified that the second extension terminal has issued a hold release request.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a hold release system from a person to be held in a private branch exchange according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention.
The multi-function telephones (multi-function telephones MKT-A and multi-function telephone MKT-B) are respectively connected to the telephone switch (TSW) of the private branch exchange via the extension terminal interface circuit (LC).
To form a mutual communication path. The multi-function telephone MKT-B has a minimum dial button, some service function buttons and a handset (HS), and the multi-function telephone MKT-A has a speaker calling circuit (SPK) and HS / SPK switching circuit (S
It is a multi-function telephone composed of PSW).

Further, the central part of the private branch exchange comprises a speech path switch (TSW) forming a speech path, a holding sound sending circuit (HLT) for sending a holding sound, and a central control section (CPU) for controlling their operations. It is configured. The central control unit CPU operates according to a call processing program, and when there is a hold release request described later, the corresponding part of this program is executed, and the hold release request is issued to the holder side. It should be noted that FIG. 1 shows each constituent element of the private branch exchange that is directly related to the present invention, and the constituent elements that are not directly related to the present invention are not illustrated.

The operation of this embodiment will be described below. Now
When the multi-functional telephone MKT-A and the multi-functional telephone MKT-B are in a call, the multi-functional telephone MKT-B is set to the receiving channel of the multi-functional telephone MKT-A by the call path switch TSW.
Of the multi-function telephone MKT-B is connected to the multi-function telephone MKT-B of the multi-function telephone MKT-A (call path state indicated by symbol in FIG. 1).

Here, when the multi-function telephone MKT-A tries to hold this call once, the multi-function telephone MKT-A
A hold request signal is sent to the central control unit CPU via LC by pressing the hold button on the board surface of -A or by a special number operation for making a hold request. Upon receiving the hold request signal from the multi-function telephone MKT-A, the central control unit CPU connects the reception channel of the multi-function telephone MKT-B and the transmission channel of the hold sound sending circuit HLT via the speech path switch TSW. , Holds the multi-function telephone MKT-B. The operator of the multi-function telephone MKT-B recognizes that the call is on hold by the hold tone sent from the hold tone sending circuit HLT (in FIG. 1).

This hold state is set as the person to be held (multifunctional telephone M
To cancel the call by the will of the KT-B) and call the person on hold (on the MKT-A side of the multi-function telephone), the holdee operates the hold release button on the board of the multi-function telephone MKT-B (for example, the service function). The button "release" is pressed) or a special number operation for releasing the hold is performed, and a hold release request (speaker call request) is sent to the central control unit CPU.

At this time, if the multi-function telephone MKT-A is not in a call with a third party, the central control unit CPU follows the hold release request and the receiving channel of the multi-function telephone MKT-B and the call of the hold sound sending circuit HLT. The connection with the channel is released, the transmission channel of the multifunction telephone MKT-B is connected to the reception channel of the multifunction telephone MKT-A again, and the multifunction telephone M
The transmission channel of the multi-function telephone MKT-A is connected to the reception channel of KT-B.

At the same time, the central control unit CPU sends a command for switching the HS / SPK switching circuit SPSW to the multi-function telephone MKT-A. Upon receiving this, the multi-function telephone MKT-B receives the HS / HS connected to the handset HS side.
The SPK switching circuit SPSW is switched to the SPK side, and the voice signal from the multi-function telephone MKT-B is transferred to the multi-function telephone MK.
It is possible to flow to SPK of T-A (in FIG. 1).

On the other hand, the held person multifunctional telephone MKT-B
Recognizes the reconnection with the multi-function telephone MKT-A when the hold tone stops, and sends a voice from the speaker calling circuit of the multi-function telephone MKT-A by voice from its own handset HS. Call MKT-A. By these operations, the multi-function telephone MKT-A recognizes the call from the multi-function telephone MKT-B, and by performing a response operation, the HS / SPK switching circuit SPSW is switched to the handset HS side again and the original call path is restored. (In FIG. 1) is formed. FIG. 2 is a sequence diagram showing the above series of operations. 2 in FIG. 2 corresponds to 1 in FIG.

In the above description, the multi-function telephone MKT-A which is the holder and the multi-function telephone MKT-B which is the person to be held are multi-function telephones, but they are provided with a function of receiving the DP signal transmitted during the hold. For example, the holdee side can also perform a special number operation by a DP signal of a general telephone. Also, by a special number operation of a telephone capable of transmitting a PB signal, the PB signal received inside the exchange is converted and the contents are converted to the central control unit CP.
It becomes possible if a PB signal receiving circuit (PBR) for transmitting to U is provided.

FIG. 3 is a sequence diagram showing a series of operations when the PB signal is used. In FIG.
Corresponds to ~ in. The formation of the communication path in the case of the PB signal is as shown in FIG. 1 while the call is on hold. In this case, the PB signal receiving circuit PBR monitors the PB signal in the voice signal from the telephone TEL-B, which is the person to be held, and reports the pressing of the special number to the central control unit CPU. The CPU can recognize the hold release request from the multi-function telephone MKT-B.

In the present embodiment, the case has been described as an example where the multi-function telephone MKT-A that has been put on hold is not in a call with a third party, but the present invention is not limited to this and a call is in progress. It is also applicable in the case of. In this case, the HS / SPK switching circuit SPSW is operated in units of, for example, several milliseconds so as not to hinder the call, and the handset HS and the speaker calling circuit SPK are temporarily switched to hold the person to be held. Is requesting a hold release. In addition, when the multi-functional telephone on the holdee side has a display or the like, the hold release request from the person to be held may be displayed on this display.

Further, in the present embodiment, the telephone set on hold is a multi-function telephone set, but the present invention is not limited to this.
It is applicable even in the case of a single-function telephone without K. That is, in the case of such a single-function telephone, if the holdee's telephone is not busy when the holdee makes a hold release request, for example, a ringing signal is sent to the holdee's telephone to put the call on hold. When the holder side responds to the hold release request from the person, the reconnection is performed and the hold is released. Further, when the caller is busy, the signal indicating that the call release request has been put on the receiving channel of the caller may be superposed at intervals of several milliseconds and transmitted to the caller.

Further, in the present embodiment, if the holdee side is in a call when the holdee side issues a hold release request, the exchange notifies the holdee side of that fact and issues a hold release request. You may inquire whether to do it. Furthermore, in the present embodiment, an example in which the present invention is applied to a private branch exchange has been described, but the present invention is not particularly limited to a private branch exchange, and may be applied to, for example, a button telephone system having a similar circuit, function and structure. Is also applicable.

[0025]

As described above, according to the present invention, 2
When a call is put on hold by the operation of one speaker from the caller's call state, it is possible to call the hold side by a button operation from the hold side, so the hold person is said to be kept on hold forever. It can be expected to improve usability and convenience for users.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a hold release system from a person to be held in a private branch exchange according to the present invention.

FIG. 2 is a sequence diagram showing an example of a hold releasing operation in the embodiment of FIG.

3 is a sequence diagram showing an example of a hold releasing operation in the embodiment of FIG.

FIG. 4 is a block diagram of a private branch exchange in the prior art.

FIG. 5 is a sequence diagram showing a conventional hold releasing operation.

[Explanation of symbols]

 CPU Central control unit HLT Hold tone sending circuit HS Handset LS Extension terminal interface circuit MKT-A, MKT-B Multi-function telephone SPK Speaker calling circuit SPSW HS / SPK switching circuit TSW Speech path switch

Claims (3)

[Claims] 1. A private branch exchange having a call holding service function for holding a call during a call, wherein the private branch exchange has a first extension terminal and a second extension terminal accommodated therein.
When the second extension terminal receives a call hold request from the first extension terminal during a call, the second extension terminal holds the second extension terminal and the second extension terminal holds the second extension terminal.
Receiving a hold release request from the extension terminal, the first extension terminal is notified of the hold release request from the second extension terminal. Release method. 2. The hold releasing method according to claim 1, wherein when the first extension terminal in the first half is a multi-function telephone having a speaker and handset switching function, the private branch exchange releases the hold from the second extension terminal. Upon receiving the request, a command to switch from the handset to the speaker is sent to the first extension terminal, and the fact that the hold release request has been issued from the second extension terminal is output from the speaker. Releasing method from the holdee side in. 3. The hold release system according to claim 1, wherein in the case where the first extension terminal in the previous term is a multi-function telephone having a function of switching between a speaker and a handset, the private branch exchange releases the hold from the second extension terminal. When the request is received, a command for switching from the handset to the speaker is sent to the first extension terminal, and when the communication path between the first extension terminal and the third party is not formed, the first extension terminal is switched to the first extension terminal. When a speech path is formed so that a voice signal from the second extension terminal is output from the speaker, and the handset of the first extension terminal is off-hook, the speaker is switched to the handset by the switching function, and the hold is released. A hold release method from the person to be held in the private branch exchange, which is characterized in that