JPS61177097A - Key telephone set - Google Patents

Abstract

PURPOSE:To make it possible to access from another key telephone set by transmitting an access from another key telephone set through a data transmission line to the key telephone set in talking by a specific notice. CONSTITUTION:When an extension key telephone set 1(2) accesses a key telephone set 1(1) during the talking with a telephone set in a line wire, a control circuit 23 sends a control signal indicating the access from the other key telephone set 1(2) through a data carrier 4(1) connected to the key telephone set 1(1) to the key telephone set 1(1). A control circuit 12 in the key telephone set 1(1) decodes the control signal, actuates a notice sound source 13 and generates a notice from a receiver of a hand set 10. When a speaker turns on a key switch 14, the control circuit 23 in the main device 2 transfers a control signal for stopping the notice sound source 13 and then switches an extension cross point 20 so that the channel of the key telephone set 1(1) is connected to the key telephone set 1(2).

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a button telephone device in which a main device and a butane telephone are connected by two pairs of extension transmission paths, a voice path and a data transmission path.

[Technical background of the invention]

Conventionally, in this type of button telephone device, only one pair of voice paths is allocated between the main device and each butane telephone. Therefore, when a call is in progress, voice calls from other butane telephones cannot be accepted.

Therefore, in order to make it possible to make voice calls from other button telephones even during a call, conventional methods have been used in which calls from other button telephones are interrupted or mixed into the voice path during the call. It was carried out in

[Problems with background technology]

However, with the method of interrupting the voice path of a call from another butane telephone, the call is interrupted regardless of the caller's will, which causes discomfort and at the same time
The other party who was on the phone suddenly interrupted the call,
There was a problem in that if the call was determined to be abnormal, it would cause discomfort5. On the other hand, the method of mixing calls from other butane telephones has the problem that the other party on the other end of the call can also hear the ringing tone.

In this case, the above problem can be solved by increasing the number of voice paths into multiple pairs or adding another call path, but in this case, the number of signal lines increases and the circuit becomes complicated. A problem arises in that the cost becomes extremely high.

[Purpose of the invention]

The present invention eliminates the above-mentioned drawbacks and provides a button telephone device that allows calls from other butane telephones without causing discomfort to the caller during a call and without causing an increase in communication costs. With the goal.

[Summary of the invention]

In the present invention, the fact that there is a call from another butane telephone via the data transmission path is notified to the butane telephone in use by a specific notification sound, and the call is initiated based on the operation of a predetermined key switch. The above objective was achieved by configuring the system so that when switching to another butane telephone, the switch is restored to the original communication path.
.

[Embodiments of the invention]

FIG. 1 is a block diagram showing an embodiment of the present invention, in which a plurality of butane telephones 1(1) to 1@ are connected to a main device 2 through voice paths 3(1) to 3(to) and data transmission path 4 ) - are connected by a 4-axis extension line transmission line, an extension cross point 20 in the main unit 2 performs exchange connection between extension lines, and an external line cross point 21 - connects the extension line and the central office line 5. An exchange connection is now in place.

In addition, each butane telephone 1 (1) to 1 (to)) has no.
In addition to the hybrid circuit 11 serving as an interface for communication signals to the handset 10, a data transmission line 4t-
a control circuit 12 for transmitting and receiving control signals through the telephone, a notification sound source 13 for notifying that a call has been received from another telephone during a call, and a key switch 14 for responding to a call from another telephone; Display 1 that indicates that the voice path 3 ([(N=1 to N) has been switched to another telephone
5 is provided.

On the other hand, in addition to the extension cross point 20 and external line cross point 21, the main device sends a control signal indicating that the key telephone in use has received a call from another key telephone (including an outside line). At the same time, the key switch operation signal from the button telephone 1 (c) (N = 1 to N) that has received the 1 control signal is monitored, and the call path of the butane telephone 1 @ which is in call is monitored according to the operating state of the key switch 14. A control circuit 23 is provided to switch the call to the other butane telephone that made the call. Further, a hold sound source 24 is provided to notify the original call destination (C) that the call path has been temporarily switched.

In this embodiment, the hold sound source 24 is connected to the switch 2.
5 to the central office line cross point 21.

In the above configuration, when the butane telephone 1 (1) is connected to the central office line 5 and is talking to an outside line telephone, if the extension key telephone IC 2) calls this butane telephone 1 (1), the control circuit 23 detects the call information from the butane telephone 1 (2) through the data transmission line 4 (2) 't-, and then sends the other button via the data transmission line 4 (1) leading to the butane telephone 1 (1). A control signal indicating that there is a call is sent from the telephone to the butane telephone 1 (1).

Then, the control circuit 12 of the butane telephone 1 (1) decodes this control signal, activates the notification sound source 13, and generates notification sound from the receiver (or monitor speaker) of the handset 10.

Therefore, in response to this notification sound, the caller presses the key switch 1.
4, this on operation signal is sent to the control circuit 12.
and is sent to the main device 2 via the data transmission path 4 (1).

When the control circuit 23 of the main device 2 receives the ON operation signal of the key switch 14 from the button telephone 1 (1) that sent the control signal, the control circuit 23 first sends a control signal to the button telephone 1 (1) to stop the notification sound source 13'f: After transferring to the central office line, the central office line cross point 21 is opened, the switch 25 is turned on, and the hold sound source 24 is connected to the central office line 5, and the communication path is temporarily switched to the other party on the outside line. A notification sound will be sent to indicate this. Thereafter, the extension cross point 20 is switched so that the communication path of key telephone 1 (1) is connected to key telephone 1 (2).

This makes it possible to talk between key telephones 1(1) and 1(2).

At this time, the control circuit 23 sends a control signal to the tube button telephone 1 (1) indicating that the communication path has been switched to the side of the butane telephone 1 (2) that made the call later, and displays 1s on the display.
t-lit display.

Then, the key switch 1 in the butane telephone 1 (1)
4 is released and this is detected by the control circuit 23 in the main device 2, the extension cross point 2
0 death and outside line cross point 21 are restored to their original state,
The speech path of the butane telephone 1 (1) is connected to the central office line 5.

As the key switch 14, a non-lock type key switch may be used as described above, but if a lock type key switch is used, the communication path will be switched each time the key switch is turned on. The structure may be configured so that the state is reversed.

In addition, a fixed time is set for the button telephone that is in use for calls from other butane telephones, and if the key switch is not operated within this time, calls from other button telephones are forcibly stopped. You can do it like this.

Figure 2 schematically represents the state of the call path at 9 o'clock when key telephone 1 (2) makes a call.The switch state shown by the broken line is the original call state, and the switch state shown by the solid line is the state when the call is answered. It represents the state of.

〔Effect of the invention〕

As explained above, according to the present invention, the fact that there is a call from another telephone other than the one in use is notified via the data transmission path, and the call path is switched in response to the response, so that the call is stopped. 4th diagonal copy of the funeral home I received,
If you wish to make a change, you can inform the person on the other end of the call to that effect beforehand.

Therefore, calls from other telephones can be answered without causing discomfort to the caller. Furthermore, since existing cross points and the like are used without adding a special call route, the increase in cost can be kept to a minimum.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a schematic diagram showing states before and after switching the communication path. 1(1) to 1(6)...Butane telephone, 2...Main device, 3...Audio path, 4...Data transmission path, 10...
- Handset, 12... Control circuit, 13... Announcement sound source, 14... Key switch, 15... Display, 2
0... Extension cross point, 21... External line cross point, 23... Control circuit, 24... Hold sound source.

Claims (4)

[Claims] (1) A button equipped with a main device that performs exchange operations between extensions and between extensions and central office lines, and a plurality of button telephones connected to this main device by two pairs of extension transmission lines: a voice line and a data transmission line. In the telephone device, the key telephone includes a notification sound source that notifies you of a call from a key telephone other than the other party's key telephone, and a key switch that responds to the call from the other key telephone. , a control means for transmitting the operation signal of the key switch to the main device via the data transmission path and for operating the notification sound source in response to a control signal input from the main device via the data transmission path; The main device includes a means for transmitting a control signal to activate the notification sound source via a data transmission line when the key telephone in use receives a call from another key telephone; monitors the operation signal of the key switch that is input, and depending on the state of the operation signal, transfers the call path of the button telephone in use to the other button telephone that made the call and the original button telephone that was in the middle of a call. A button telephone device characterized by being provided with a switching means for switching. (2) A patent characterized in that the key switch is a non-locking switch, and only when the key switch is turned on, the communication path of the key telephone in use is switched to the side of the other key telephone that made the call. A button telephone device according to claim (1). (3) The button according to claim (1), characterized in that while the call path of the button telephone during a call is switched to another button telephone, this state is displayed on a display. Telephone device. (4) While the call path of the button telephone that is in use is switched to another button telephone, a notification tone is sent to the original button telephone that was in use to notify the switching state. A button telephone device according to claim (1).