JPH04192956A - House hold simple telephone exchange - Google Patents

Abstract

PURPOSE:To announce the cancel of holding to a user by an alarm tone by automatically detecting the holding cancel of catch phone service by the telephone exchange and transmitting the notifying tone for cancel announcement to each telephone set. CONSTITUTION:A holding cancel detection circuit 21 detects the holding tone transmitted in the holding of catch phone service and when it is stopped, the holding cancel state is detected. According to the output of the circuit 21, the control circuit of an announcing means 22 judges the cancel of holding and transmits the notifying tone for holding cancel from a notifying tone generating circuit to each telephone socket, and the tone is rung by a loudspeaker. Since the hook-up telephone set is connected to a line wire in the case of the cancel, it is not necessary to detatch a receiver and when the receiver is picked up after listening to the notifying tone, normal line wire speaking is enabled. Thus, the cancel of holding can be announced to the user by the notifying tone.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a simple telephone exchange for home use that enables external and internal telephone calls by switching and forming communication paths between external lines and internal lines or between internal lines. It is related to the device.

[Conventional technology]

The system configuration of this type of home simple telephone exchange equipment is the third
As shown in the figure. This simple home telephone exchange device connects outside lines via disconnector G and protector H! , to the telephone exchange connected to telephone office E, and to this telephone exchange A, extension l and control line! , and a plurality of telephone outlets B to which commercially available telephones C are removably connected. By switching the communication paths between the two, it is possible to make outside calls and internal calls using the telephone set C connected to the telephone outlet B. In addition, in this simple home telephone exchange device, the door phone D is connected to the telephone exchange A through the telephone line 14,
Telephone C can also be used to make door intercom calls.

Each telephone outlet B is provided with a modular jack M, through which a general commercially available telephone C can be detachably connected. Also, this telephone outlet B is a control line! , a speaker SP for reproducing notification signals such as extension ringtones or doorphone ringtones sent through , and this control line! , a light-emitting display section La that displays whether an internal call is in progress or an outside call is in progress by discriminating a display signal that is a voltage signal sent through the
Lb, and these speakers SP and light emitting indicators La and Lb are used to perform notification and display operations.

The volume of the speaker SP can be adjusted using a volume control switch ■S.

[Invention or problem to be solved]

By the way, in the call waiting service provided by NTT, when the network is in a waiting state, a holding tone is sent to the terminal to notify the terminal that the meeting is in progress, or a call waiting tone is sent out to the terminal, or the conventional simple home telephone mentioned above is used. With the exchange device, there was a problem in that it was necessary to wait until the other party released the hold without hearing the on-hold tone.

The present invention has been made in view of the above-mentioned points, and its object is to provide a simple telephone switching device for home use in which it is possible to cancel the hold state of a call waiting service without hearing the hold sound. It's about doing.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a hold release detection means for detecting a hold sound sent when a call waiting service is on hold, and generating a hold release output when the hold sound stops; and notification means for receiving the output and generating a notification sound to notify the release of the hold when the hold is released.

Note that the hold release detection means may detect the hold release from an audio signal other than the hold sound that is sent after the hold is released.

[Effect]

By having the above-described configuration, the present invention allows the home simple telephone exchange device to automatically detect the release of the hold state of the call waiting service, and at this time notify the user with a notification sound that the hold state has been released. This allows you to know whether the hold is released or not without hearing the hold sound.

〔Example〕

An embodiment of the present invention is shown in FIGS. 1 and 2. FIG.

First, the configuration of the telephone exchange will be briefly explained along with its operation. In telephone exchange A, as shown in FIG. 2, relay contacts r1 to r,
is provided, and these relay contacts r, ~r connect and disconnect the extension line 12 and the outside line l, so that the extension line l becomes the outside line I! ,
The communication current for extension calls or doorphone calls in a state of being disconnected from the communication current supply circuit 4. ~4. It should be supplied from In addition, the above relay contact r1
~r, is usually an extension! ! 2 is switched to the side that disconnects it from the outside line p, so when an outside line is received, the outside line! , switched to the side.

Now, suppose that an incoming external call is detected by the incoming call detection circuit 5.
Control circuit composed of CPU] 1 or relay contacts r, ~r
2 to the outside line f, the outside line incoming signal sent through the outside line l is sent to the telephone C, and a built-in ringer or the like of the telephone C rings to make an outside line call. When the user picks up the handset of telephone C in response to this call, an outside call becomes possible. By the way, the above relay contact r
Hook/DP detection circuits 21 to 2.1 to r are installed on the telephone outlet B side. is installed to detect the dial signal based on the dial pulse (DP) signal input from telephone C and the hook state of telephone C, and as mentioned above, when telephone C is off-hook when an outside call is received, , upon receiving the output of the hook/DP detection circuit 2 corresponding to the telephone C, the control circuit 11 determines that an outside line call is in progress;
At this time, a display signal is sent from the display control circuit 18 to each telephone outlet B through the control line 1, and the light-emitting display section La of each telephone outlet B is turned on to indicate that an outside line call is in progress. An amplifier AMP is inserted into the transmission path of the display signal and the notification sound signal to be described later to amplify the signals.When making an outside line call from the telephone set C, the receiver is lifted up and dialed. In the following explanation, the case where the telephone line contract is a dial pulse line will be explained. The off-hook state of the telephone C is detected by the hook/DP detection circuit 2, and at this time the control circuit 1
1 drives the signal tone generating circuit 20 to send a pseudo dial tone similar to the dial tone (two tone) sent from the telephone office to the telephone C through the extension l. Note that the sending of this pseudo dial tone is stopped when the hook/DP detection circuit 2 detects the first dial signal. By the way, in this type of home simple telephone switching equipment, call processing such as extension calls is performed by telephone C.
Since the dialing operation is performed by inputting a specific dialing signal from the telephone C, even if a dialing operation is performed on telephone C, it does not necessarily mean that it is an outside line call, but may be a call processing such as an extension call. Therefore, the control circuit 11 that receives the dial signal starts making an outside call only when the number of digits of the dial signal exceeds the number of digits of the dial signal (two digits in the case of this embodiment) assigned for call processing. Start. This outside call is D.
This is done by driving the P sending circuit 6 and sending a DP multiplied signal to the outside line 11 via the diode bridge DB. When the other party answers in response to this outside line call, the polarity of outside JIp is reversed, and this polarity reversal is detected by the polarity reversal detection circuit 16.
Detected by 1. and then external line 1. Telephone C that made the outside call
is connected to the extension L, and the relay contact R is connected to the extension L.
switch to enable outside calls. At this time as well, the display control circuit 18 causes the telephone outlet B to display an outside line call in progress. Further, the polarity reversal detection circuit 16
After the polarity reversal is detected in the external line! ! , short-circuit both ends of the diode inserted in , with relay contact r4, and connect the external line I! This is to eliminate the increase in DC resistance of the telephone connected to the telephone. Furthermore, a dial tone, such as a busy tone, sent through the outside line l is detected by the outside line dial tone detection circuit 8, and at that time, the signal tone generating circuit 20 is sent to the telephone C that made the outside line call to the extension i. , to send a busy tone.

When making an extension call, a dial signal is input using the telephone C in the same manner as when making an outside call. The control circuit 11 determines that this is an extension call from the number of digits in the dial signal, and at this time drives the notification sound generation circuit 17 to call the telephone through the control line l corresponding to the telephone C on the called side. A notification tone signal is sent to outlet B, and an extension ring tone is sounded from speaker SP of telephone outlet B. Then, the hook/DP detection circuit 2 detects that the telephone C of the called party has responded and is off-hook, and the control circuit 11 controls the crosspoint switch 10 to connect the extension corresponding to the telephone C of the calling party. , and the extension l corresponding to the called party's telephone C are connected to enable an extension call.

At this time, the display control circuit 18 causes the telephone outlet B to display the extension call status.

Incidentally, although the above-mentioned extension call is made to a specific telephone C, if the telephone C to be called is unspecified, it is possible to make a general call. In this case, when a dial signal corresponding to simultaneous ringing is input from telephone C, an extension ring will sound from each telephone outlet B at the same time, and if any telephone C goes off-hook in response to this ringing, Upon receiving the detection output of the hook/DP detection circuit 2 corresponding to the telephone C, the control circuit 11 selects the extension l corresponding to the telephone C and the extension l corresponding to the calling telephone C! to enable extension calls.

Furthermore, this home simple telephone exchange device is equipped with a hold tone sending circuit 9 that allows a hold operation to be performed and sends out a hold melody tone. In addition, if the telephone line contract is a button line, the dial signal based on the PB double signal from the button type telephone C is compared with the PB receiver 12.13, and the line is closed with the DC connection circuit 3. The operation is similar to that of the dial pulse line, except that the PB dialer 7 sends a dial signal to the outside line l in the connected state.

Furthermore, a power supply voltage detection circuit 19 for detecting a drop in the power supply voltage is provided to cope with the case where the contents stored in the buffer inside the control circuit 11 are destroyed due to a drop in the power supply voltage.

Next, a case where there is a doorbell call will be described. In the case of this embodiment, two door phones D can be connected, and the door phone call detection circuit 14 detects that a push button of the door phone D is pressed, and upon receiving this detection output, the control circuit 11 causes the notification sound generation circuit 17 to send out a notification sound signal corresponding to the doorphone ringing to each telephone outlet B, and causes the telephone outlet B to sound the doorphone ringing tone.

When the handset of one of the telephones C is picked up in response to this intercom call, the control circuit 11 connects the telephone line 14 of the intercom D that made the call and the extension l of the telephone C that responded to the switch S1. Connection is made by turning on any one of St and switching the cross point switch 10, and a doorphone call is made possible.

Here, the doorphone call is made via the doorphone call circuit 15.

The characteristic configuration of this embodiment will be described below. In addition to the above-described configuration, the home simple telephone switching device of this embodiment is newly provided with a hold release detection circuit 21 that detects when the hold state in the call waiting service is released. By the way, the on-hold tone sent to a terminal placed on hold in the call waiting service is a combination of a signal obtained by modulating 400 Hz with 16H2 and a 400 Hz signal. Therefore, the hold release detection circuit 21 detects the hold sound, and detects the hold release state when the hold sound is no longer sent. In this embodiment, the hold release detection circuit 21 at the time of release of hold
The control circuit 11 determines from the output that the hold has been released, and at this time, the notification sound generation circuit 17 sends out a notification sound signal for releasing the hold to each telephone outlet B.

Therefore, the speaker SP of the telephone outlet B can emit a notification sound to notify that the hold has been released. In addition, with this simple home telephone switching device, when the hold is released, the hooked-up telephone C can be connected to the outside line L, so there is no need to take off the handset while the phone is on hold, and the notification tone for releasing the hold is not necessary. If you pick up the handset when you hear this, the control circuit 11 will create a call path and you can make an outside call as usual. By the way, the first
The notification means 22 in the figure is the control circuit 1 in FIG.
1. It is composed of a notification sound generation circuit 17 and a speaker SP.

By the way, the above-mentioned hold release detection circuit 21 may have been configured to detect the hold sound and detect the hold release state from the stop of the hold sound, or the frequency component of the hold sound may be only around 400Hz as described above. Therefore, the above-mentioned hold release detection circuit 21 is configured using a band rejection filter that blocks signals in this band so that no output is generated during hold, and the hold is released and the call is started. The output may be generated based on the audio signal input when the user receives the audio signal.

〔Effect of the invention〕

As described above, the present invention provides a hold release detection means that detects a hold sound sent when a call waiting service is on hold and generates a hold release output when the hold sound stops, and an output of this hold release detection means. and a notification means that generates a notification sound to notify the user that the hold has been released when the hold is released.
The home simple telephone exchange device automatically detects the release of the hold state of the call waiting service, and at this time, it can notify the user with a notification tone that the hold is on hold or has been released, and the user can hear the hold release or on-hold tone. I can understand it easily.

Further, even if the hold release detection means detects the hold release from an audio signal other than the hold sound sent after the hold release, it is possible to detect whether the hold has been released without hearing the hold sound.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the main configuration of an embodiment of the present invention, FIG. 2 is a circuit diagram of a telephone exchange having the same functions as described above, and FIG. 3 is a system configuration diagram of a simple telephone exchange for home use. A is a telephone exchange, C is a telephone, l is an outside line, 12 is an extension line, 21 is a hold release detection circuit, 11 is a control circuit, 17 is a notification sound generation circuit, and SP is a speaker.

Claims (2)

[Claims] (1) Consisting of a telephone exchange connected to an outside line, which is a public telephone line, and multiple commercially available telephones connected to this telephone exchange by extensions, the telephone exchange provides a communication path between outside lines and extensions, or between extensions. In a simple home telephone switching device that enables external and internal calls using the above-mentioned telephone set, the on-hold tone sent when the call service is on hold is detected, and the on-hold tone is switched on when the on-hold tone stops. A simple home telephone switching device comprising: a hold release detection means that generates a release output; and a notification means that receives the output of the hold release detection means and generates a notification sound notifying the hold release when the hold is released. . (2) The home simple telephone exchange device according to claim 1, wherein the hold release detection means detects hold release from an audio signal other than a hold sound transmitted after the hold is released. .