JPH04117894A - Key telephone system - Google Patents

Abstract

PURPOSE:To easily identify whether or not a call comes from a trunk line by ringing each single telephone set with a call signal in the case of the arrival of the call from the trunk line and generating a sound different from the ring tone from a speaker. CONSTITUTION:In the case of the arrival of a call from a trunk line 1, a control circuit 5 starts a 16Hz signal oscillator 3 and an incoming call tone oscillator 4. Since the 16Hz signal oscillator 3 outputs a 16Hz call signal, each single telephone set not hooked off rings and since a tone signal different from the 16Hz signal is outputted from the incoming call tone oscillator 4, a sound different from the ring tone is sounded from a speaker 9. Thus, the arrival of the call from the trunk line 1 is confirmed by each of the single telephone sets 61,..., 6n, and the arrival of the call from the trunk line 1 is identified depending on the sound from the speaker.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a button telephone device (system telephone device) that enables a plurality of stand-alone telephones to efficiently use a central office line. The present invention relates to a button telephone device that allows incoming calls from a telephone line to be distinguished from incoming calls from an extension telephone, door-pong, etc.

2. Description of the Related Art Conventionally, this type of button telephone device has been used to make and receive calls from any telephone to any central office line, to place calls on a central office line during a call, to receive calls from a doorbell to a telephone, and to make calls to other telephones. It has functions such as call transfer.

For example, when receiving a call from a central office line, a ringing signal (
16Hz signal) is output to multiple stand-alone telephones (extension telephones), so each stand-alone telephone rings in response to the ringing signal, making it possible to recognize incoming calls from the central office line. . Thereafter, when any stand-alone telephone is hooked off, the hooked-off stand-alone telephone is connected to the local office line and a telephone call is enabled.

Problems to be Solved by the Invention However, in the above button telephone device, when receiving a call from a central office line, an extension telephone, or a doorbell, each stand-alone telephone rings with the same 1f3Hz ringing signal. Since the ringing sound is the same, it is not possible to determine whether the call is coming from a central office line, an extension telephone, or a doorbell, and it is inconvenient that, for example, it is not possible to decide what to do with the call.

The second invention was made in view of the problems mentioned above, and its purpose is to generate a sound or voice different from the ringing sound of a stand-alone telephone when a call is received from a central office line, An object of the present invention is to provide a button telephone device that can identify incoming calls.

Means for Solving the Problems In order to achieve the above object, the present invention provides a key telephone device that allows receiving calls from a central office line, an extension telephone, a doorbell, etc. A circuit, a ringing signal oscillator that outputs a ringing signal to ring multiple stand-alone telephones connectable to the central office line when an incoming call is detected from the central office line, and a ringing signal that outputs a ringing tone signal different from the ringing sound. a ring tone signal oscillator, a switching circuit for switching a hook-off stand-alone telephone among the plurality of stand-alone telephones to the office line side, and a switching circuit that starts at least the ring signal oscillator and the ring tone oscillator, and generates the ring signal and the ring tone. A control circuit that controls signal generation, an amplifier that amplifies the ring tone signal output by the ring tone oscillator described in 1 above, a speaker that generates sound from the amplified ring tone, and an external speaker. This allows incoming calls from a telephone line to be distinguished from incoming calls from an extension telephone, doorbell, etc.

Since the configuration is as described in 1. When a call arrives from the central office line, the incoming call is detected by the central office line incoming call detection circuit, and this incoming call detection signal activates the 16H7 signal oscillator and the ringtone oscillator in the control circuit. . Then, since the 16 Hz signal oscillator outputs a 15 Hz signal, each stand-alone telephone rings with this 1f3 Hz signal, and the ringtone oscillator outputs a sound signal different from the 16H2 signal, so this sound Sound corresponding to the signal is generated from the speaker and an external speaker. The sound generated from this speaker or an external speaker makes it possible to identify that the call is coming from a central office line rather than an extension telephone or doorbell.

Example Embodiments of the present invention will be described below based on the drawings.

In the figure, this button telephone device includes a central office line incoming call detection circuit 2 that detects an incoming call from a central office line 1, and upon receiving this call,
A 16Hz signal oscillator (calling signal oscillator) 3 that outputs a calling signal (16Hz signal) and its 1 (ringing tone oscillator 4 that outputs a sound signal different from the 3Hz signal) and a ringing tone oscillator 4 that outputs a sound signal different from the 3Hz signal, and the 16Hz signal oscillator 3 and a control circuit 5 for starting the ringtone oscillator 4, and a plurality of stand-alone telephones (extension telephones) 61..., 6n are normally connected to the 16Hz signal oscillator 3 side and connected to the central office line 1 side by hook-off. an amplifier 8 that amplifies the sound signal from the ringtone oscillator 4 to a predetermined value, and a speaker 9 that generates sound from the amplified sound signal.Although not shown, the button telephone device As in the past, multiple stand-alone telephones (extension telephones) 61..., 6
Detects an incoming call from a telephone, doorbell, etc., outputs a ringing signal (16 H2 signal) to a standalone telephone other than the caller's standalone telephone, and connects the hooked-off standalone telephone to central office line 1. It has functions etc.

When a call arrives from the office line 1, this call is detected by the office line call detection circuit 2, and based on the detection signal of this call, the control circuit 5 outputs 1.61 (z signal oscillator 3 and ringtone oscillator 4). As a result, the 16H2 signal oscillator 3 outputs a ringing signal of the 16H2 signal, so each stand-alone telephone that is not hooked up rings, while the ringtone oscillator 4 outputs a ringing signal that is different from the 16H2 signal. Since the sound signal is output, a sound different from the ringing sound is emitted from the speaker 9. Therefore, each stand-alone telephone 6
1, . . . , 6n, and the incoming call from the central office line 1 can be identified by the sound from the speaker.

In this way, when there is an incoming call from central line 1, speaker 9
Since the caller generates a sound different from the ringing caused by the 15 Hz signal, it can be determined that the call is not coming from an extension telephone, doorbell, etc., and, for example, it is possible to judge whether the call is incoming.

Further, as shown in the figure, the button telephone device is provided with a terminal 11 to which an external speaker 10 can be connected. Thereby, the external speaker 10 can be installed at a position away from the button telephone device, that is, at a position where the sound generated from the internal speaker 9 cannot be heard.

In other words, in the case of a large telephone, you have a stand-alone telephone at hand, but even if the button telephone device is far away, you can hear the sound generated from the external speaker 10, and as above, you can hear the sound generated from the external speaker 10. Incoming calls can be determined.

Further, the ring tone oscillator 4 is provided with a memory in which, for example, melody data, voice data, etc. are stored. When an incoming call from the central office line 1 is detected, the control circuit 5 activates the ringtone oscillator 4, but the ringtone oscillator 4 uses a predetermined signal according to the control of the side circuit 5. The stored data is converted into a sound signal, and this sound signal is output. That is, since a melody and voice are generated from the speaker 9 and the external speaker 10, it becomes easier to identify an incoming call from the central office line 1.

As described in detail, the button telephone device of the present invention includes a central office line incoming call detection circuit that detects incoming calls from the central office line, and a ringing signal (16Hz signal) by detecting incoming calls on the central office line.
It is equipped with a 15Hz signal oscillator that outputs a 15Hz signal oscillator, a ringtone signal oscillator that outputs a sound signal different from the ringing signal, and an amplifier and a speaker that generate a sound corresponding to this sound signal. In addition to ringing each stand-alone telephone with a ringing signal, the speaker also generates a sound different from this ringing, so that when each stand-alone telephone rings, it is easy to identify whether the call is coming from a central office line or not. It is possible to take into account the response to the incoming call.

Further, according to the button telephone device of the present invention, an external speaker can be connected in addition to the above-mentioned speaker, so even if you are located far away from the button telephone device, you can determine whether a call is coming from a central office line. , for example, it has the advantage that it can be applied to large floats.

[Brief explanation of the drawing]

The figure is a schematic block diagram of a button telephone device showing one embodiment of the present invention. 1... Office line, 2... Office line incoming detection circuit, 3... 1f
3Hz signal oscillator (calling signal oscillator), 4. Ring tone oscillator, 5. Control circuit, 61. ..., 5n...Independent telephone (extension telephone), 7...Switching circuit, 8...Amplifier, 9...Speaker, 10...External speaker, 1
1...Terminal.

Claims (3)

[Claims] (1) A central office line receiving means that detects an incoming call from the central office line, and a calling device that outputs a ringing signal to ring a plurality of stand-alone telephones connectable to the central office line when detecting an incoming call from the central office line. a signal generating means and a ringing tone signal generating means for outputting a ringing tone signal different from the ringing sound of the signal generating means; a switching means for switching a hook-off standalone telephone among the plurality of standalone telephones to the central office line side; control means for activating the ringing signal generating means and the ringing tone generating means and controlling the generation of the ringing signal and the ringing tone signal;
A key telephone device comprising: a ringtone output means for generating a sound based on the ringtone signal outputted by the ringtone generation means. (2) The button telephone device according to claim 1, wherein the ring tone signal generating means includes a memory and generates a melody signal or a voice signal upon detecting an incoming call from the central office line. (3) The ring tone output means includes an amplifier that amplifies the ring tone signal to a predetermined value and a speaker that generates a sound according to the amplified sound signal, and has a terminal to which the same external speaker as the speaker can be connected. 2. The button telephone device according to claim 1, further comprising: a button telephone device, wherein the external speaker can be installed at a position remote from the button telephone device.