JPH02279095A - button telephone device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a button 71i telephone device having a plurality of extension telephones and capable of accommodating a single telephone.

[Prior Art] Hybrid key telephone devices have been widely used in the past, which can house not only extension-only telephones but also stand-alone telephones in the same device.

FIG. 4 is a block diagram showing a conventional example of a configuration for controlling the ringing of a single telephone in such a vibe lift type key telephone device.

This button telephone device includes a call path switch lOO for exchanging call voices, and a control unit 101 for controlling the entire exchange.
and 16 Hz75 Vrv for single telephone 107
It has a changeover switch 104 that switches between a continuous signal source 105 that supplies a calling signal of s and a silent terminal 106.

In this device, when a standalone telephone 107 receives an incoming call from an outside line or a request for an incoming call from an extension, the control section 101 connects the changeover switch 104 to a signal source 105 and causes the standalone telephone 107 to ring. Then, after a certain period of time, the changeover switch 104 is connected to the silent terminal 106 to set the silent state.

Then, the selector switch 104 is connected to the signal 5105 again, and the independent telephone 107 is made to ring.

Such control is repeated until the individual telephone 107 responds or the caller abandons the call.

[Problems to be Solved by the Invention] Incidentally, the extension telephone of a key telephone device is dedicated to the device, and its ringing signal is generally sent out via a communication path. Furthermore, due to the diversification of services, the ringing signals sent from the communication path have various patterns. The pattern will depend on the external line to be connected.

On the other hand, in the above-mentioned hybrid key telephone device, as shown in FIG. The forms are different. For this reason, the ringing patterns of extension telephones and standalone telephones are not unified within the same device.

The drawback was that it was difficult for users to use.

SUMMARY OF THE INVENTION An object of the present invention is to provide a button telephone device that can unify the ringing of an extension telephone and a stand-alone telephone housed in the same equipment M and is easy to use for the operator.

[Means for Solving the Problems] The present invention provides a button telephone device having a plurality of extension telephones and capable of accommodating a single telephone. The present invention is characterized by comprising an extraction means for extracting the sound, and a control means for controlling the ringing sound source of the individual telephone based on the extraction signal of the extraction means.

[Operation] In the present invention, since the individual telephone rings in synchronization with the ringing signal for the extension telephone sent from the communication path, the ringing of the extension telephone and the individual telephone can be unified within the same device.

[Example] FIG. 1 is a block diagram showing one embodiment of the present invention.

This button telephone device includes a call path switch 200 for exchanging call voices, a control section 201 for controlling the entire device,
A timing extractor 202 that extracts ringing and silent timings of a calling signal, and a sound source 2 that includes ringing and silent timings for calling an extension telephone.
03 and a continuous tone lI for the ringing signal of the standalone telephone 207.
203 and a silent terminal 206, the standalone telephone 41207 is made to ring at the timing of the ringing signal extracted from the communication path by the timing extraction section 102.

In this button telephone device, a case will be described in which the ringing sound source 203 is provided with a pattern synchronized with an incoming call signal from a central office line.

An incoming call signal arrives from the central office line, and the control unit 20 indicates that one call has arrived.
1 is detected, the call path switch 200 is controlled to connect the paging sound source 203 to the timing extraction section 202.

As a result, the timing extractor 20
2 is set, and when the timing extraction unit 202 receives the ringing signal, it controls the changeover switch 104 based on this ringing signal, and connects the standalone telephone 207 and
A sound source 205 of 16 Hz75 Vr+ms, which is the calling signal, is connected. As a result, the standalone telephone 20
7 starts ringing.

Then, after a certain period of time (approximately 1 second if the accommodating station line is an NTT line), the station line side changes from the ringing state to the silent state. Due to this change, the ringing signal is stopped from the ringing sound source 203 and a silent signal is sent out. When the timing extractor 202 receives and detects the silent signal, it switches the contact of the changeover switch 204 to the silent terminal 206 side. As a result, the standalone telephone 207
stops ringing and transitions to silent state.

Furthermore, after a certain period of time (approximately 2 seconds if the accommodating station line is an NTT line), the peripheral side shifts to a ringing state again. Then, the ringing sound source 203 operates to send a ringing signal to the timing extraction section 202, and when the timing extraction section 202 detects it, it switches the contact of the changeover switch 204 to the signal source 205 of 16Hz75Vrms.

By repeating the above operations until the standalone telephone 207 responds or the caller abandons the call, the standalone telephone 207 rings in synchronization with the incoming call signal from the central office line.

In this embodiment, in the case of an extension-only telephone, its ringing circuit is directly connected to the same communication path as the timing extraction section 202, and the operations up to the timing extraction section 202 are the same and are synchronized with the incoming signal of one station line. It beeps. Therefore, if the same path is set by the one-channel switch 200 for the extension-only telephone and the standalone telephone in the same device, the ringing pattern will be the same in synchronization with the incoming call signal of the central office line.

FIG. 2 is a circuit diagram showing a specific example of the configuration of the timing extraction section 202, and FIG. 3 is a waveform diagram showing signal waveforms of each section in FIG.

Figure 2 shows the case where the communication path is a 2MHz PCM highway, and the downlink PCM highway is 300.2M.
A PCM codec 303 that inputs an Hz clock 301 and an 8KHz sampling synchronization signal 302 and outputs an analog output signal 304, an operational amplifier 306, an input resistor R1, a feedback resistor R2, and a rectifier diode D.
i, a half-wave rectifier circuit 320 having D2, and an operational amplifier 3
11. Addition/smoothing circuit 321 including input resistance R3, addition resistance R8, feedback resistance R4, and smoothing capacitor C1, transistor 316, bleeder resistance R5, R
6 and a level conversion circuit 322 having a current limiting resistor R7.

The timing extraction section 202 converts the ringing signal of the PCM-converted calling signal into the PCM codec 30.
3 receives the signal, D/A converts it, and outputs it as an analog output signal 304 (FIG. 3(a)). Then, this analog output signal 304 is converted into an inverted half-wave rectified signal by a half-wave rectifier circuit 320. (FIG. 3(b)). This signal and the analog output signal 304 of the PCM codec 303
is input to the adder circuit 321, and the aftereffect rectified waveform (third
(shown by the broken line in FIG. 3(c)) is obtained, but is smoothed by the capacitor CI (shown by the solid line in FIG. 3(c)), and this signal is converted into a timing signal by the level conversion circuit 322 ( Figure 3(b)). When the ringing signal is a silent signal, the analog output signal 304 is not output, so the transistor 316 is cut off and the level of the timing signal becomes VCC. In this way,
By using this circuit, it is possible to extract the ringing and silent timing included in the calling signal from the communication path.
The changeover switch 204 can be controlled.

In the above embodiment, the sound source 203 itself includes ringing and silent timing for calling an extension telephone, but for example, the pattern of the extension ringing signal corresponding to the incoming signal of a central office line, an extension line, or other incoming calls can be set by the device. The control unit reads the corresponding pattern each time and controls the call path switch to connect/disconnect the continuous sound source to the call path and generate ringing and silent calling signals. It can be similarly applied to such things.

[Effects of the Invention] According to the present invention, by extracting the ringing and silent timing of the ringing signal for the extension telephone sent from the communication path and controlling the ringing signal for the individual telephone, This has the effect of making it possible to unify the ringing of the extension telephone and stand-alone telephone, providing an easy-to-use system for the operator.

[Brief explanation of drawings]

Figure m1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a circuit diagram showing a specific example of the configuration of the timing extraction section in the same embodiment. FIG. 3 is a waveform diagram showing signal waveforms at various parts in FIG. 2. FIG. 4 is a block diagram showing an example of a configuration for controlling the ringing of a single telephone in a conventional key telephone device. 0...Call path switch, 1...Control unit. 2... Timing extractor, 3.205... Calling sound source, 4... Changeover switch. 6...Silent terminal, 7...Single telephone.

Claims (1)

[Scope of Claims] In a button telephone device having a plurality of extension telephones and capable of accommodating a single telephone, an extraction means for extracting ringing and silence of a calling signal for an extension telephone sent from a communication path; A button telephone device comprising: control means for controlling a ringing sound source of a single telephone based on the extraction signal of the extraction means;