JPH066469A - Private branch exchange - Google Patents

Abstract

PURPOSE:To prevent unnecessary calling by holding an incoming call at the extension of a transfer destination until such time as the call can be responded when it is difficult to immediately respond to the incoming call by transfer at the transfer destination. CONSTITUTION:For instance, when the central office line SL1 of a caller and an extension L1 on a called side is in a speech state through an exchange circuit 1, it is assumed that the extension number of the extension L2 is dialed after the speaker of an extension telephone set EKT1 (depresses a hold key on the telephone set in order to transfer the call during speech at the extension L1 to the extension L2. When the extension L2 is idle, voice calling by the speaker of the extension telephone set EKT1 from a speaker on the extension telephone set KET2 is performed. In this case, when the speaker of the transfer destination replies through a microphone that the transfer can not be immediately responded, a control circuit 2 holds the incoming call with conditions that the hold key is pressed at the transfer origin and a handset is on-hook and transmits hold sound to the caller during the series of transfer processing.

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 used in, for example, offices and business establishments, and more particularly to a private branch exchange having a transfer function by a voice call.

[0002]

2. Description of the Related Art Generally, a private branch exchange has various service functions, one of which is a transfer function by a voice call. When transferring a call in progress at any extension telephone to another extension, this function first outputs the voice from the speaker on the extension telephone of the transfer destination to call the other party's speaker, and the presence of this speaker After confirming, the transfer is performed.

Each extension telephone of a private branch exchange having this kind of function is provided with a microphone together with the above-mentioned speaker, and the transfer destination speaker takes the receiver off-hook for a voice call from the transfer source speaker. You can respond to this without. In addition, the presence of the transfer-destination speaker is confirmed from this response, and when the receiver goes on-hook at the transfer source,
The private branch exchange sends a ringing signal to the transfer destination and a ringback tone to the calling source. Then, when a response is made to the call by the off-hook at the transfer destination, the call originator and the transfer destination are connected to establish a call state.

[0004]

However, there is a case where the transfer-destination speaker answers the voice call from the transfer-source speaker but cannot immediately accept the incoming call due to reasons such as being unable to release the hand. is there. In such a case, there is a problem that the ringing tone of the telephone at the transfer destination is annoying. Further, there is a problem in that the caller speaker is kept waiting for a long time in the calling state.

Therefore, an object of the present invention is to provide a method in which it is difficult to immediately respond to an incoming call due to transfer at the transfer destination.
An object of the present invention is to provide a private branch exchange capable of preventing unnecessary calls by holding the incoming call until a response becomes possible.

[0006]

In order to achieve the above object, the present invention provides a process for transmitting information related to transfer notification input from a transfer source extension terminal to a transfer destination extension terminal during transfer between extensions. In the private branch exchange equipped with transfer control means by voice call for calling the transfer destination extension terminal and connecting with the caller according to the restoration of the transfer source extension terminal, At the time of transfer control by the control means, a judging means for judging whether or not the hold transfer is designated, and when the judging means judges that the hold transfer is designated, an incoming call from the calling source is made. And a holding transfer control means for putting the terminal into a holding state at the transfer destination extension terminal.

[0007]

As a result, according to the present invention, after the transfer processing is notified to the transfer destination speaker, for example, when the hold transfer is designated in the transfer source extension terminal, the transfer destination extension terminal is notified to the transfer destination extension terminal. The ringing signal is not transmitted, and the incoming call from the calling source is put on hold at the extension of the transfer destination.
As a result, even if the transfer destination speaker cannot immediately respond to the incoming call due to the transfer, the problem that the unnecessary ringing continues and the ringing sound becomes unpleasant as in the conventional case is prevented.

[0008]

EXAMPLE An example of the present invention will be described below. In this embodiment, a private branch exchange having a transfer function by voice call will be described as an example. FIG. 1 is a circuit block diagram showing the configuration of a private branch exchange according to an embodiment of the present invention. In the figure, this private branch exchange comprises an exchange circuit 1 and a control circuit 2.
A memory circuit 3, extension circuits LC1 to LCn, station line circuits TRK1 to TRKm, and a control data bus line 4 for transmitting various control signals between these circuits and the control circuit 2. There is. Further, the tone signal generating circuit 5 is connected to the control circuit 2 through the control data bus line 4.
Are connected. The tone signal generation circuit 5 generates various tone signals such as busy tone and dial tone according to the instruction of the control circuit 2. Further, 6 is a timer circuit, which measures a preset time under the control of the control circuit 2.

Each of the extension circuits LC1 to LCn has an extension L1.
To Ln are connected to extension telephones EKT1 to EKTn, and office lines SL1 to SLm are connected to office line circuits TRK1 to TRKm, respectively. Extension circuit LC
1 to LCn and station line circuits TRK1 to TRKm are connected to extensions L1 to Ln and station line SL1 respectively.
~ SLm is monitored and control information is exchanged with control circuit 2 to perform predetermined line control.

Under the control of the control circuit 2, the exchange circuit 1 includes the extension circuits LC1 to LCn and the office line circuits TRK1 to TRK.
Km is exchange-connected with each other, and the extension circuits LC1 to LCn are exchange-connected with each other.

The control circuit 2 includes, for example, a microcomputer as a main control unit, and in addition to various ordinary control means such as exchange control relating to incoming and outgoing calls, hold transfer designation determining means 21 and hold transfer control. It has means 22. The determination means 21 is provided by the extension telephones EKT1 to EKT.
During the extension transfer at n, it is monitored whether or not the transfer destination designates the hold transfer. When the hold transfer is designated, the hold transfer control means 22 puts the incoming call from the call originator on hold in the transfer destination extension telephone in response to the end of the extension telephone of the transfer source. is there.

The extension telephones EKT1 to EKTn are
As one of the function keys provided on each telephone,
It is provided with a "hold key" for temporarily holding a call during communication.

Next, the operation of the private branch exchange configured as described above will be described. Now, suppose that the caller station line SL1 is
It is assumed that the extension L1 on the called side is in a call state via the exchange circuit 1. In this state, it is assumed that the speaker of the extension telephone EKT1 dials the extension number of the extension L2 after pressing the hold key on the telephone in order to transfer the call in progress on the extension L1 to the extension L2, for example. Then, the dial signal corresponding to this dial-in extension number is sent to the extension circuit LC1 and detected, and the extension number corresponding to this dial signal is sent to the control circuit 2 via the control data bus line 4. When the control circuit 2 receives the transfer destination extension number from the extension telephone EKT1 in step 2a of FIG.
In step 2b, it is determined whether the transfer destination extension corresponding to this transfer destination extension number, that is, L2 is busy or idle. As a result, when the extension L2 is in communication with another extension or another station line, the control circuit 2 instructs the tone signal generating circuit 5 to generate a busy tone (busy tone) in step 2c. Then, a busy tone is generated from the tone signal generation circuit 5, and the busy tone is transmitted via the exchange circuit 1 and the transfer source extension circuit LC1 to the extension telephone EKT.
Sent to 1.

On the other hand, as a result of the above judgment, when the extension L2 is idle, the control circuit 2 instructs the tone signal generating circuit 5 to send a warning sound to the extension telephone EKT2 of the transfer destination in step 2d, and In step 2e, the extension telephone EKT1 of the transfer source is transmitted to the tone signal generating circuit 5.
To send a voice call start tone to the. At the same time, the timer circuit 6 is activated and the elapse of a predetermined time is monitored in the subsequent step 2f.

When the predetermined time has elapsed as a result of the monitoring in step 2f, the control circuit 2 sends a warning sound to the transfer destination extension telephone EKT2 to the tone signal generating circuit 5 in steps 2g and 2h, respectively. At the same time as instructing stop, instructing stop of sending of the voice call start tone to the transfer source extension telephone EKT1. Further, in step 2i, the extension L1 and the extension L2 are connected by the exchange circuit 1. At this time, in the extension telephone EKT2, transmission / reception can be performed by a speaker and a microphone on the telephone instead of the handset in the on-hook state. Under such a condition, the speaker of the extension telephone EKT1 is
The transfer destination speaker, who is considered to be in the vicinity of KT2, makes a voice call from the handset to notify the transfer processing. Then, in the extension telephone EKT2, a voice call is made by the speaker of the extension telephone EKT1 from the speaker.

In response to the voice call, the transfer destination speaker immediately responds to the transfer by the microphone, and in response, the extension telephone set EKT is received.
Suppose that the speaker of 1 directly hooks the handset. The control circuit 2 monitors whether or not the hold key is pressed again in the extension telephone EKT1 in step 2j after connecting the extension L1 and the extension L2 to each other in the call state in step 2i. When it is detected in step 2j and step 2k that the handset is on-hook without pressing the hold key at the transfer source, step 21
In step 2m, a ringing tone is sent to the transfer destination extension telephone EKT2, and in step 2m, a ring back tone (R / B / T) is sent to the calling source station line. Then, in this state, when a response is made by the speaker at the extension telephone EKT2, the control circuit 2 connects the extension L2 and the office line SL1 to establish a call state.

On the other hand, in response to the voice call by the speaker of the extension telephone set EKT1 described above, the transfer destination speaker immediately replies by the microphone that it cannot respond to the transfer. In response, the extension telephone set EKT1 receives the reply. It is assumed that the speaker first presses the hold key and then hooks the handset. When the control circuit 2 detects in step 2j and step 2n that the handset is on-hook at the transfer source after pressing the hold key, the control circuit 2 puts the incoming call for transfer to the extension L2 on hold in step 2o. . It should be noted that a call-hold tone is transmitted to the calling party during the above-described series of transfer processing.

As described above, according to the present embodiment, when the caller at the transfer destination is called by voice and the on-hook is performed after pressing the hold key on the transfer source telephone,
No call is made to the transfer destination extension telephone, and the incoming call from the transfer source is held at the transfer destination extension telephone. Therefore, when it is determined that it is difficult for the transfer-destination speaker to respond to the incoming call immediately by transfer, the transfer-source speaker presses the hold key on the extension telephone and then ends the call. It is possible to prevent generation of unnecessary ringing tone in the extension telephone. In addition, since the hold tone continues to be output to the caller speaker until the call is transferred to the transfer destination extension telephone, even if the transfer destination speaker cannot immediately respond to the incoming call, It is no longer necessary to keep the calling speaker waiting for a long time while keeping the ringing sound as in the conventional case.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the hold key is pressed again when performing the hold transfer, but any function key may be used as long as the function key means a request for the hold transfer. You may arbitrarily set the meaning special number. Further, in the above-mentioned embodiment, the hold is released by the response of the transfer destination speaker after the hold transfer process, but when the response is not made for a certain period of time, the call of the transfer destination is started. You may. By doing so, it is possible to prevent forgetting to answer the held incoming call. Further, in the above-mentioned embodiment, the designation of the hold transfer is made at the transfer source extension telephone, but it may be made at the transfer destination extension telephone. In addition, various modifications can be made without departing from the scope of the present invention.

[0020]

As described above in detail, according to the present invention, it is judged whether or not the hold transfer is designated at the time of the transfer between extensions, and if the hold transfer is designated, the caller sends the call. Since the incoming call is put on hold at the transfer destination extension terminal, it is possible to provide a private branch exchange capable of preventing the generation of unnecessary ringing tones at the transfer destination extension terminal.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a private branch exchange according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a control procedure and control contents of the control circuit shown in FIG.

3 is a flowchart showing a control procedure and control contents of the control circuit shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Exchange circuit, 2 ... Control circuit, 3 ... Storage circuit, 4 ... Control data bus line, 5 ... Tone signal generating circuit, 6 ... Timer circuit, 21 ... Judgment means, 22 ... Hold transfer control means, E
KT1 to EKTn ... extension telephone, L1 to Ln ... extension, S
L1 to SLm ... local lines, LC1 to LCn ... extension circuits, TR
K1 to TRKm ... Local line circuit.

Claims (1)

[Claims] 1. When performing extension-to-extension transfer, after performing processing for transmitting voice information related to transfer notification input from a transfer source extension terminal to a transfer destination extension terminal, restoration of the transfer source extension terminal is performed. Accordingly, in a private branch exchange equipped with transfer control means by voice call for calling the extension terminal of the transfer destination and connecting with the call originator, the hold transfer is designated at the time of transfer control by the transfer control means. Determination means for determining whether or not the incoming call from the calling source is put on hold at the transfer destination extension terminal when it is determined that the hold transfer is designated. A private branch exchange comprising: