JP2637085B2 - Telephone system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a telephone system.

[Background Art] Conventionally, as this kind of telephone system, there is a so-called home telephone. In this type of telephone, a dedicated telephone must be connected as a slave telephone, and a telephone desired by a user is connected. I couldn't do that.

There is also a telephone system of this type in which a door phone is also connected. However, since the extension between the main device and the telephone is a two-wire line, the bell of the connected telephone is ringed for both a call on the door phone and an incoming call on an outside line. However, there is a problem that the discrimination is poor. Further, in this conventional example, since there is no means for displaying the use state, there is a problem that the use state cannot be understood only by looking at the telephone directly connected to the extension.

[Object of the Invention] The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a telephone system which can recognize an incoming call state at a telephone outlet and can be connected to an ordinary general single telephone. Another object of the present invention is to provide a telephone system in which a general single telephone can be used to communicate between extensions.

[Disclosure of the Invention] The present invention will be described with reference to examples.

Embodiment 1 FIG. 1 shows an entire configuration of an embodiment of a telephone system according to the present invention. In this embodiment, an extension call is made possible. Door phone 3
Is connected as an external line, and a plurality of sets of internal lines including an internal line 5 and a control line 6 are connected. Telephone outlets 10 ₁ ... Are connected to each internal line.

FIG. 2 is a circuit block diagram of the first embodiment of the main apparatus 1, in which lines L ₁ and L ₂ forming the outside line ₂ have an incoming signal detecting section 7 for detecting an incoming signal, a holding circuit 8, A four-wire telephone outlet 10 ₁ is connected to a coupling transformer 9 for extracting a button signal, and is further connected to an internal line.
The contact b of the switching contact 20 ₁₁ of the external line switching relay Ry ₁₁ .
₁ … connected.

The main device 1 doorphone 3 ₁ ... of connecting a call line 4 connecting and terminal 12 ₁ ... a plurality of, each connected to the terminal 12 ₁ ... respectively intercom 3 ₁ ... of the call signal detector 14 ₁ ... and back connect the tone sending portion 15 ₁ ... and through the intercom changeover relay Ry ₂ of switching contact 16 is connected to the intercom call circuit 13.
The door phone communication circuit 13 includes a relay contact 17 of the door phone communication connection relay Ry ₃ and a relay contact 18 of each extension connection relay Ry ₄₁₁ , Ry ₄₁₂ … provided corresponding to each telephone outlet 10 ₁ .
_11, 18 is connected ₁₂ ... and through a capacitor 19 ₁ ... DC blocking to each external line changeover relay Ry ₁₁ ... of switching contact 20 ₁ ... a contact point of the. The above relay contact 17 and relay contact 18 ₁₁ ... connection point is connected to the output of the sound source generating portion 23 via the relay contact 21 ₁ and the DC cut capacitor 22 of another extension connected relay Ry _51.

Further output above back tone sending unit 15 via a capacitor 22 of the sound source generating portion 23 ₁ ..., it is connected to a telephone outlet I / F audio amplifier 24, further the relay contacts 21 _{and second} extension connection relay Ry ₅₂ each The relay contacts 18 ₁₂ are connected to the connection points of the relay contacts 18 ₁₁ and the capacitors 19 ₁ through the relay contacts 18 ₁₂ .

The output of the telephone outlet I / F audio amplifier 24 is supplied to each telephone outlet 10 through the DC cut capacitor 26 and the relay contact 25 _{1 of the} extension calling relay Ry6 ₁ … provided corresponding to each telephone outlet 10 ₁ …. ₁ ... are connected to the termination connection terminal corresponding to the line L ₃ of the control lines 6. The line L ₃ of the control line 6 via the coil 27 ₁ ... interrupting source signal telephone outlet I
The output of the / F display drive unit 28 is connected.

The control circuit 11 composed of a CPU performs control processing of the driver transistor of each relay and sound selection of the sound source generation unit 23,
Control of the back tone transmitting sections 15 _1, ..., Control of the hold circuit 8 and the hold tone generating section 29, determination of the incoming call detection signal of the incoming call detection section 7, determination of the call signal of the call signal detection sections 14 ₁ ,. The detection of the detection signal of the dial pulse detecting section 30 ₁ ... Or the push button dial signal receiving section 31 is performed. In the figure, I ₁ ... Are extension current supply sources.

As shown in FIG. 3, the main device 1 having the above-described circuit configuration is provided with a circuit housing for accommodating necessary circuits such as the above-described electronic circuits and relays in a central portion, and a back portion on one side. An external line, an internal line, a device main body 33 provided with a low voltage side terminal portion 32b for connecting a low power line such as a low voltage power line, etc. This device body 3
As shown in FIG. 4, the center projecting portion 33a is fitted into the center opening window 34 from the back, and the apparatus main body 33 is fixed by screws or the like. As shown in FIG. 5B, it is formed by a size module of a ready-made wiring device, and its size is set to, for example, a quadruple size, and the depth dimension from the mounting frame 35 is shown in FIG. The size is such that it can be stored in the ready-made switch box 36 as described above. Further, it has the same configuration as a normal mounting frame, such as a connecting means for wiring equipment, a mounting hole for the switch box 36, and a fitting hole for a scissor fitting.

FIG. 5 shows an embedding hole 38 formed by drilling the main device 1 in a building material 37.
When the rear part of the device body 33 is stored in the switch box 36, the insulating separator 39 protruding from the bottom of the switch box 36 is connected to the circuit storage part and the low voltage The low-voltage power supply line 41 and the small force line 42, which is an internal line and an external line, are fitted to the fitting groove 40 provided at the boundary portion of the side terminal portion 32b to prevent cross contact. The mounting frame 35 is screwed to the surface of the building material 37 or screwed to a screw hole (not shown) provided in the switch box 36, and the decorative plate 43 is mounted on the surface side.

FIG. 6 shows a case where connection with another wiring device is performed, and a mounting frame 35 'of another wiring device is connected to the mounting frame 35. FIG. 7 shows a decorative plate 4 used in this case.
Fig. 3 shows a perspective view of 3 ', in which an opening 44 for projecting a central projecting portion 33a of the device main body 33 and an opening 44' for exposing a wiring device are opened.

The telephone outlets 10 ₁ ... Are connected between the modular jack 45 connected to the lines L ₁ and L ₂ of the extension 5 and the lines L ₃ and L ₄ of the control line 6 as shown in FIG. the voltage level detection circuit 46a which turns on in response to a DC voltage, 46b and the line L _3, L ₄ capacitor 47 is connected between the series circuit of the volume control volume 49 of the loudspeaker 48 and the slide type, the voltage level detection line L ₃ are respectively corresponding to the circuit 46a, 46b and the voltage level detection circuit 46
a, 46b are connected to the outside line busy display light emitting diode LEDa and the inside line busy display light emitting diode LEDb. The voltage level detection circuits 46a and 46b are turned on in response to the voltage signal from the main device 1, so that the busy state can be displayed by the light emission of the red light emitting diode LEDa and the green light emitting diode LEDb according to the outside line and the inside line. Has become. Speaker 48
, Which constitutes an incoming call display means, sounds by a sound source signal transmitted from the main unit 1 superimposed on the lines L ₃ and L ₄ , and can notify an incoming call from the intercom 3 ₁ . I can do it.

9 (a) and 9 (b) show the external configuration of the telephone outlets 10 ₁ ...
The circuit is built into the body 50 corresponding to the individual module,
A terminal portion 51 for connecting the extension 5 and the control line 6 is provided on the back of the unit 50, and a modular jack 45 on the surface side of the body 50,
The display portions of the light emitting diodes LEDa and LEDb are exposed, the operation knob 52 of the volume control volume 49 is slidably exposed, and the sound output hole 53 of the speaker 48 is opened. The mounting frame 54 to which the body 50 is mounted has the same configuration as a normal mounting frame mounted on a ready-made embedded box (not shown) so that the telephone outlets 10 ₁ ... can be handled in the same manner as a normal wiring device. It has become.

 Next, the operation of the telephone system of this embodiment will be described in more detail.

FIG. 10 shows the configuration of the control program of the main device 1. The major processes are divided into three groups: initialization at system startup, input processing, and output processing. Figure 11 shows. Initialization is further divided into I / O / memory initialization and interrupt / timer initialization. In the initialization of the I / O memory, an initial value is set in the memory inside the control circuit 11. That is, the control circuit 11 manages the state of the general single telephone set T connected to each telephone outlet 10 ₁ .
The main operation is to set various state variables, and the initial value set in the memory is to initialize these variables. I / O initialization is to set the incoming call display, busy display and control of each relay to the initial state.

The interrupt / timer initialization sets the related functions of the control circuit 11 so that the interval interrupt for the periodic access of the input signal and the control of the time element can be used.

The input process is a process for controlling the state variables held in the memory of the control circuit 11 in accordance with occurrence of various input events, and a flowchart thereof is shown in FIG. The input processing further includes a hook-on / off processing shown in FIGS. 13 (a) and 13 (b), a dial input processing shown in FIG. 14, an outside-line incoming call processing shown in FIG. 15 (a), and FIG. It is classified into the intercom call processing shown in b).

Here, in the input processing, a hook dial pulse detector detects a hook on / off of the connected general single telephone T.
30 ₁ Detected by (or push button dial signal receiving unit 31). Then, the control circuit 11 determines that the hook-off has occurred when the first rising of the detection signal shown in FIG.
The hook-off process shown in FIG. 13 (a) is performed. That determines whether the incoming call from the outside line 2 in this process, the process of the outside line 2 busy if the incoming call, if not the incoming call to determine if the door phone 3 ₁ ... during call, in the calling If there is, the processing during the call with the intercom 3 ₁ ...
It is determined whether or not a call is being made between each other.
If the call is not being further processed, the outside line 2
It is determined whether or not it is usable. If the outside line 2 is usable, the process during the call of the outside line 2 is performed, and if the outside line 2 is not usable, the process during the call between the extension lines 2 is performed. Therefore, if there is no extension 5 call, external line incoming call or intercom call, the extension 5 connected to the telephone set T is connected to the external line 2 simultaneously with the hook-off.

If there is the final fall, it is determined that the hook is on, and whether or not the outside line 2 is in use is determined by this determination. If the outside line 2 is in use, the outside line 2 is released. , To determine whether extension 5 is in use,
If during the use of the extension 5 of the opening of the extension 5, or in a unless the intercom 3 ₁ ... during the use of the use, to determine whether, intercom 3 ₁ ... call line if the intercom 3 ₁ ... in use of 4 is released, the general single telephone T which is connected if not in use.
Of the idle state. When a dial operation is performed between hook-off and hook-on, and a dial pulse P is detected as shown in FIG.
Detects the dial data shown in FIG. 16 (c) from the dial pulse P, and performs processes such as a hold process and a door phone call based on the dial data. That is, as shown in FIG. 14, it is determined from the dial data whether or not the call is to the outside line 2, and if the call to the outside line 2 is being made, the dial is performed as it is. Only processing, hold release, or door phone call is determined. No. 16
FIG. 7B shows a detection period from hook-off to hook-on.

More specifically, the control circuit 11 counts the time interval between the first dial operation and the second dial operation. If the second dial operation is not performed within a predetermined time, it is determined that the call is not an outside line, and based on the dial data. It does the processing. In the present embodiment, the dial from "1" to "5" is set to 1 for each telephone outlet 10 ₁ ... Of each internal line connected to the main unit 1.
The dial "7" is for intercom calling, the dial "0" is being held while the hold circuit 8 is detecting that the telephone is busy, and the dial "0" is held. The control circuit 11 performs an input process according to the assignment.

When the incoming call detector 7 detects an incoming signal that sounds for one second in three seconds from the central office without dial input, the control circuit 11 performs an incoming call process. This incoming call processing is shown in FIG.
Set the incoming call flag as shown in. That is, FIG.
As shown in FIG. 17, the incoming flag is set as shown in FIG. 17 (b) at the rising edge of the first incoming call detection signal of the incoming call detecting section 7, and after a certain time off delay time has passed since the last falling edge of the incoming call detection signal. After that, the flag is reset.

Such incoming detection determines the presence of the call from the doorphone 3 ₁ ... if not, if there is a call from the doorphone 3 ₁ ..., so make the intercom call flag as shown in FIG. 15 (b) is there. That is, as shown in FIG. 18 (a), when the push button of the doorphones 3 ₁ ... Is operated and the calling signal is detected by the calling signal detectors 14 ₁ .
The control circuit 11 sets the intercom ringing flag at the rising edge of the detection signal, and then resets the flag when the hook-off of the connected general telephone T is detected as shown in FIG. 18 (c). . If the hook-off detection does not exceed a predetermined time-out period, the flag is also reset. In this way, the input processing is performed as shown in FIG.

Now, on the other hand, the output processing includes connection processing as shown in FIG. 19,
There are incoming call display processing and busy display processing.
As shown in FIG. 20, it is determined whether or not an external line call is in progress, and if no external line call is in progress, the switching contacts 20 _{1 of the} external line switching relays Ry ₁₁ .
Detaching the extension 5 than external 2 connected to a contact side, external switch relay if external call in Ry ₁₁ ... of switching contact 20 ₁
Are connected to the contact b side, and the external line 2 and the internal line 5 are connected.

It is further determined whether or not an extension call is in progress. If the extension call is not in progress, the relay contacts 18 ₁₁ , 18 ₁₂ ... of the extension connection relays Ry ₄₁₁ , Ry ₄₁₂ ... are turned off, and if the call is in progress, the main device is turned on. 1 can be connected to the extension 5. Next, it is further determined whether or not a call is being made with the intercom 3 ₁ …
If the call is not in progress, the relay contact 17 of the intercom connection relay Ry ₃ is turned off. If the call is in progress, the relay contact 17 is turned on, and the output of the intercom circuit 13 can be connected to the internal circuit and the extension 2.

Next, if a door phone call is in progress, the door phone during the call is the first
Determining whether intercom 3 _1, connecting the first intercom 3 ₁ a long if intercom changeover relay Ry _second switching contact 16 to the contact b side, the a-contact side when the second intercom 3 ₂ side .
Then, it is next determined whether or not the call is being held with the outside line 2 and the call is on hold. If the call is on hold, the hold circuit 8 is turned on, and if not, the hold circuit 8 is turned off.

In the incoming call display control, as shown in FIG. 21, when an incoming signal from the outside line 2 is detected, the control circuit 12 sets an outside line alert sound and sets the relay contacts 25 _{1 of the} internal ringing relays Ry ₆₁ .
Off and turn on the relay contact 21 ₁ of the extension connection relay Ry _51. If the incoming signal is not detected, it is determined whether or not the calling signal of the intercom 3 ₁ … is detected. If the intercom signal is detected, the incoming call sound of the intercom 3 ₁ … is set, and the extension calling relay Ry is performed.
Turn on relay contacts 25a… of a ₅ … and connect the extension connection relays Ry ₅₁ ,
Turn off the relay contacts 25 ₁ and 25 ₂ of Ry ₅₂ . If there is no detection, it is determined whether there is an extension call. If an extension call is detected, an extension ring tone is set and the extension call relay is set.
The relay corresponding to the extension on the called side of Ry ₆₁ … is operated, and its relay contacts 25 ₁ … are turned on, and the extension connection relay R
y _51, the relay contact 21 ₁ of Ry _52, 21 ₂ to turn off. If no call is detected for the extension, it is detected whether the call is on hold. If the call is on hold, a hold sound is set, and the extension call relay Ry ₆₁ …
Turn on the relay contacts 25 ₁ … of the internal connection relays Ry ₅₁ , Ry ₅₂
The relay contacts 25 ₁ and 25 ₂ are turned off. The extension call relay Ry ₆₁ ... relay contact 25 ₁ of the performed silence set to be pending ... and the relay contact 25 ₁ of the extension connection relay Ry _51, Ry _52,
Turn off 25 ₂ .

As described above, in the incoming call control processing routine, the state is determined, and the control circuit 11 sets the mode of the notification sound from the sound source generation unit 23,
The notification sound of the connected general single telephone T is set.

Next, in the busy display process, as shown in FIG. 22, it is determined whether or not the outside line 2 is busy. If the outside line 2 is busy, the light emitting diode LEDa corresponding to the outside line busy is turned on. Also determine whether the pending if not busy, turns on the light emitting diode LEDa if pending, turns off the light emitting diodes LEDa if not pending, also whether it is busy doorphone 3 ₁ ... and If the doorphones 3 ₁ … are busy, the corresponding LED is turned on during the extension call, and if not busy, it is determined whether the extensions are busy. If the line is busy, the light emitting diode LEDb is turned on, and if neither extension is busy, the light emitting diode LEDb is turned off.

Thus, in the busy display processing, the light emitting diodes LEDa and LED
The lighting and turning off of b is controlled according to the state.

Thus, when an incoming signal is received from the outside line 2, the control circuit 11 determines an incoming call based on the incoming call detection signal from the incoming call detection section 7, performs an incoming call notification sound set, and makes an extension call relay Ry ₆₁ .
Off the relay contacts 25 ₁ … of the internal connection relays Ry ₅₁ , Ry ₅₂
Relay contacts 25 ₁ and 25 ₂ are turned on. At this time, since the outside line switching relays Ry ₁₁ have the switching contacts 20 ₁ ... Connected to the b-contact side, the ringing tone from the central office is transmitted to each telephone outlet 10 ₁ .
Is notified from the general single telephone set T connected to. At the same time, when the reception of the incoming signal is detected, a voltage level detection circuit 46a that controls the light emitting diode LEDa by using the DC output voltage from the telephone outlet I / F display drive unit 28 to indicate that an outside line is busy, together with the above-mentioned call. Is controlled so as to be the detection voltage. Therefore, the voltage level detection circuits 46a of the telephone outlets 10 ₁ ... Turn on to turn on the light-emitting diodes LEDa, thereby indicating that an outside line is busy.

Here, when the handset of the general single telephone set T is lifted up and hooked off, the hookoff is detected by the hook / dial pulse detecting unit 30, and the control circuit 11 enters a communication state with the outside line 2 based on this detection. Is determined. In this state, when the handset of the general single telephone set T connected to the telephone outlet 10 ₁ ... Which is in a non-communication state with respect to the outside line 2 is picked up, the hook dial pulse detecting unit 30 detects this hook-off and allows the extension telephone. the extension connection relay Ry ₄₁₂ ... relay contact 18 ₁₂ with switches external changeover relay Ry ₁₁ ... of switching contact 20 ₁ ... to extension side of a contact point if a state corresponding to the telephone outlet, ... is turned on, the sound source in external call such as "Puppuppu ..." from the generator 23, a sound source signal indicating the extension available condition, the relay contact 21 ₁ of another extension connected relay Ry _51, the relay contact 18 ₁₂ ... and, Through the switching contacts 20 ₁ … to the extension 5 corresponding to the telephone outlet,
The tone is emitted from the receiver of the connected general single telephone set T.

Next, the push button of the door phone 3 ₁ … is operated, and the door phone is operated.
When there is a call from 3 ₁ ..., The call signal is detected by the corresponding call signal detecting section 14 ₁ ..., And the control circuit 11 determines that there is a call from the intercom 3 ₁ . The determination by the control circuit 11 switches the intercom 3 ₁ ... side performing the call intercom call connection relay Ry ₃ of switching contact 16 of the relay contact 17 is turned on and the door phone switch relay Ry _2. The extension connection relay Ry ₄₁₁ ... turns on the relay contact 18 ₁₁ ... of, as well as can be connected to the intercom call circuit 13 to an extension 5, to turn on the relay contact 21 ₁₂ of the internal connection relay Ry _52. Furthermore, the relay contacts 25 _{1 of the} extension calling relay Ry ₆₁ …
Is turned on, and the output of the telephone outlet I / F amplifier 24 is connected to the control line 6. Further, the control circuit 11 has a telephone outlet I /
The voltage level of the output voltage signal of the F display drive unit 28 is set to a voltage level at which the voltage level detection circuit 46b corresponding to the extension busy light emitting diode LEDb is turned on. Further, a control circuit is provided so that the type of the sound source signal output from the sound source generating unit 23 is a signal having a corresponding timbre or a melody assigned so that the intercom 3 ₁ ...
11 controls the sound source generator 23.

Thus, a notification sound indicating that there is an incoming call from the door phone 3 ₁ ... Is emitted from the speaker 48 of each telephone outlet 10 ₁ . become. The corresponding back tone transmitting unit 15 is turned on by the control circuit 11 on the side of the intercom 3 _1, which has performed the one-way calling operation, and the sound source signal from the sound source generating unit 23 is input as the back tone, and the speaker of the intercom 3 ₁ . (Not shown).

When the incoming call of the intercom 3 ₁ is notified and the handset of the general single telephone T connected to any of the telephone outlets 10 ₁ is picked up, the telephone to which the first general single telephone T is connected is connected. Outlet 10
_The switching contacts 20 ₁ ... Of the external line switching relays Ry ₁₁ corresponding to ₁ ... Are switched to the a contact side under the control of the control circuit 11, and are connected to the doorphone via the extension 5. At the same time, the sound source generator 23 is set to a silent state. Note that if there is no hook-off of any of the telephones T, for example, 30 seconds after the calling operation is performed, the notification as the incoming call display and the display by the light emitting diode LEDb are automatically stopped.

Thereafter, when the handset of the general single telephone set T connected to another telephone outlet is picked up, if the other telephone set T is engaged in an outside line call, an external line connection relay Ry ₁₁ .
Is switched to the extension side, and at the same time the corresponding extension connection relay
The relay contacts 18 _{12 of} Ry ₄₁₂ are turned on, and the output of the sound source generator 23 is connected, but no sound can be heard from the receiver because of the silent state. That is, it is understood that the outside line is being used.
While the external line is being used, it is displayed even when the light emitting diode LEDa is turned on. If the outside line is not in use, the telephone outlet 10 ₁ to which the telephone set T picking up the handset is connected is connected.
Under the control of the external switch relay Ry ₁₁ ... control circuit 11 corresponding to, hear external dial tone from the handset for connecting 20 ₁ ... the switching contact on the outside line 2 side, it is found outside line usable state . Of course, in this case, the light emitting diode LEDa is turned off, and it can be seen from the display state that the outside line can be used.

When the call ends and the handset of the telephone set T is hooked on, the state returns to the state before the call under the control of the control circuit 11.

After While in the case of the above has been described assuming a call from the intercom 3 ₁ ..., which temporarily end the call, if the telephone side door phone 3 ₁ ... calling the picks up the handset of the telephone T, performing dial operation A predetermined number, that is, the number assigned to the intercom call, for example, "7" may be sent. That is, based on the dial data, the control circuit 11 connects the telephone outlets 10 ₁ ... To which the telephone T is connected to the door phone communication circuit 13, and the switching operation of the switching contact 16 of the door phone switching relay Ry ₂ is performed last. The user can then connect to the intercom and set a state in which a call can be made with the intercom, and can make a call with the intercom again.

Next, when making a call between extensions, the handset of the telephone set T is picked up and the extension number of the other party may be dialed. When the outside line 2 is open, the control circuit 11 picks up the handset, and if only the dial data of the extension call is detected within a predetermined time, determines that the call is an extension call, and determines that the telephone is connected to the telephone set T. 10 ₁ …
Corresponding external changeover relay Ry ₁₁ ... of switching contact 20 ₁ ... was connected to a contact side of the extension side, and on the relay contacts 18 ₁₂ ... the extension connection relay Ry ₄₁₂ corresponding simultaneously. The extension call relay Ry ₆₁ ... control circuit 11 of the relay contact 25 ₁ of which corresponds to the telephone outlet 10 ₁ ... the called side is turned, also sets the sound signal of the sound source generating unit 23 of the type of extension calls. Therefore, the sound source signal amplified by the telephone outlet I / F amplifying unit 24 drives the speaker 48 of the called telephone outlet 10 ₁ ... At the same time, the control circuit 11 is connected to the telephone outlet I / F drive 2
8 and output DC voltage to each voltage level detection circuit 4.
Set the level to turn on 6b, each phone outlet 10 ₁
.. Are turned on by the light-emitting diodes LEDb for the display during the extension.

When the handset of the telephone set T connected to the telephone outlets 10 ₁ ... of the called extension numbers is hooked off,
The control circuit 11 connects the switching contacts 20 ₁ of the external line switching relays Ry ₁₁ of the telephone outlets 10 _{1 to} the a contact side of the extension, and at the same time, the relay contact 1 of the corresponding extension connection relay Ry ₄₁₂
8 ₁₂ ... Are turned on, and the telephones T of the calling side and the called side are connected to each other through the extension 5. At the same time, extension call relay Ry ₆₁
The relay contacts 25 _{1 of} … are turned off. The set sound source signal of the sound source generating unit 23 to the sound source signal in the internal call, connects its output to a connectable state to the extension 5 through the relay contacts 21 ₁₁ of the extension connection relay Ry _51. If the telephone set T is not busy with the outside line 2 and another telephone set T is handset while the extension lines 5 are talking with each other, the control circuit 11 switches the switching contacts of the outside line relays Ry ₁₁ corresponding to the telephone outlets 10 ₁ . since connecting 20 ₁ ... the external line 2 side so that the outside line dial tone from the handset of the telephone T.

When the outside line 2 is busy, the control circuit 11 connects the switching contacts 20 ₁ ... Of the outside line relays Ry ₁₁ ... Corresponding to the telephone outlets 10 ₁ . Since the relay contacts 18 _{11 of} Ry ₄₁₁ are turned on, the handset of the telephone set T can hear the sound generated by the sound source signal output from the sound source generation unit 23 while using the extension.

When calling an outside line while the outside line is not used, the handset of the telephone set T connected to _one of the telephone outlets 10 ₁ ... May be picked up and dialed. First, the control circuit 11 and off-hook is detected connects the outside line changeover relay Ry ₁₁ ... of switching contact 20 ₁ to an outside line 2 side, further dialing operation is performed, the hook dialing pulse first dial data to control circuit 11 after entering the detector 30 _1, Fig. 23 (b) for a predetermined time as shown, extension or intercom and control circuit 11 is a call to without input of the next dial data for example, within 3 seconds determines As described above, when the next dial data is input within an interval of 3 seconds or less as shown in FIG. 23 (a), the control circuit 11 determines that an outside line is to be called, and does not switch the extension side to the outside line 2. The connection state with the telephone set T is maintained. At this time, at the same time when the hook-off is detected, the voltage level of the output voltage signal of the telephone outlet I / F display drive unit 28 is detected by a voltage level detection circuit.
The control circuit 11 sets the level at which 46a is turned on, and turns on the light emitting diode LEDa of each telephone outlet 10 ₁ …
Indicates that an outside line is busy.

By the way, if it is desired to hold the connection while the connection to the outside line 2 is established, the holding circuit 8 may be operated.

Next, the operation of the hold circuit 8 will be described. First, when calling outside line 2, the handset of telephone T is picked up.
Current flows through the light emitting diodes LED ₁ photocouplers PH ₁ which is provided in the hook dial inspection unit 30 the dial operation is inserted into the made line L ₂ as shown in FIG. 24, in Figure 25 (a) As shown, a current flows according to the dial pulse. At this time, no current flows through the light emitting diode LED ₂ of the photocoupler PH ₂ inserted into the other line L ₁ as shown in FIG. 25 (b). Therefore, the control circuit 11 to which the outputs of both the photocouplers PH ₁ and PH ₂ are input determines that it is a calling time. When the handset of the called telephone is picked up,
Polarity is inverted, the line L ₁ is H, next to the line L ₂ is L, current flows through the light emitting diode LED ₂ of the photocoupler PH _2, no current flows to the light emitting diodes LED ₁ of the other photocoupler PH _1. That is, it indicates that the telephone is in a call state.

At the time of an incoming call from the outside line 2, the light emitting diodes LED ₁ and L are alternately turned on and off according to the incoming signal as shown in FIGS. 26 (a) and 26 (b).
Current flows through the ED _2. At this time, the incoming signal transmits a 16 Hz signal for 1 second, and repeats a pause for 2 seconds, so that a pulse current flows through the alternate light emitting diodes LED ₁ and LED ₂ for _{1 second,} and then the current of both the light emitting diodes LED ₁ and LED ₂ flows for 2 seconds. Does not flow.
And after this state is repeated, the handset of the telephone T is taken up, at which point the line L ₂ H, line L ₁ is L, the light emitting diode current flows through the LED _1, the light emitting diode LED ₂ current Stops flowing. That is, it indicates that the telephone is in a call state.

Here, the control circuit 11 determines whether or not a call is being made at both the time of outgoing call and the time of incoming call.
Figure photocoupler as shown in (b) PH ₁ or photocoupler PH ₂
The control circuit 11 sets a flag when the output of the control circuit 11 becomes H for 5 msec or more. The lifetime of this flag is set to 3 seconds, H becomes as shown on the reverse output of the photocoupler PH ₁ or PH ₂ of its upright flag within 3 seconds Figure 27 (b) or FIG. 28 (a) If the state continues for one second, the control circuit 11 determines that the call is in progress as shown in FIG. 27 (c) or FIG. 28 (c). Since the determination is made as shown in FIGS. 27 and 28, the telephone call can be determined even when the lines L ₁ and L _{2 of the} external line ₂ are reversely connected.

When a call is put on hold in a state where it is determined that a call is in progress (shown in FIG. 29 (a)), first, the number assigned to the hold by the dial operation of the telephone T, for example, "0"
Outgoing. When this dial operation is performed, the line L ₂
During the dial pulse, as shown in FIG. 29 (b), the hook / dial pulse detectors 30 ₁ .
Detected by the photocoupler PH _1, and inputs to the control circuit 11 as the dial data. Control circuit 11 which has received the dial data is judged to hold operation, to turn on the transistor Q _1, to drive the relay Ry _7, turn on the relay contact 55,
The resistance R is connected to the lines L ₁ and L ₂ to be in a hold state. When the telephone T is disconnected from the telephone outlets 10 ₁ … in this hold state,
The output of the photocoupler PH ₁ becomes the L. The output of the photocoupler PH ₁ is H again to connect the telephone T. To release the hold, a dial operation is performed, and the dial data of "0" is transmitted to the control circuit through the hook / dial detection unit 30 ₁ .
Given the 11, the control circuit 11 determines that hold release, turns off the transistors Q ₁ to return the relay Ry _7, turns off the relay contact 55, since the resistance R isolate than between lines L _1, L ₂ is there. At this time, since the telephone T has already captured the outside line 2, the telephone conversation can be continued. Fig. 29 (c)
The output of the photocoupler PH _2, also FIG. (D) of indicating the hold.

When the hold is set, a hold sound is emitted from the hold sound generation unit 29 and sent to the telephone of the other party through the outside line 2.

At this time, a light emitting diode LEDa that indicates that the outside line is busy
The control circuit 11 controls and sets the level of the output voltage signal of the telephone outlet I / F drive unit 28 so as to blink, and blinks to indicate that it is on hold.

When a call is made from the intercom 3 ₁ ... During an outside line call, when a dial number corresponding to the intercom 3 ₁ ... In response to the dial data from the detecting units 30 ₁ , the control circuit 11 activates the hold circuit 8 to put the telephone in a hold state, and connects the telephone set T to the intercom 3 _{1 in the same} manner as the intercom call.

Therefore, the dial operation only needs to be performed once for the doorphone connection.

The telephone outlet I / F drive unit 28 and the voltage level detection circuits 46a and 46b are composed of circuits as shown in FIGS. 30 and 31, and the telephone outlet I / F drive unit 28 outputs, for example, four types of voltage levels. Can output a voltage signal,
For example, when the transistor Qa is turned on, the input of the amplifier AP is dropped to the ground, and for example, the bias of the output transistors Qe and Qf is correspondingly controlled by the output of the amplifier AP,
The output voltage between the lines L ₃ and L _{4 is set} to 0 V, and when the transistor Qb is turned on, a voltage obtained by dividing the power supply voltage Vc by the resistors R ₁ and R ₂ is applied to the input of the amplifier AP, and the corresponding voltage of the amplifier AP The bias of the transistors Qe and Qf is controlled by the output, and accordingly, for example, 5 V is set as the output voltage between the lines L ₃ and L ₄ . Similarly the voltage by the resistor R ₁ and R ₃ and turn on the transistor Qc is applied to the input of the amplifier AP and applies it to the voltage corresponding, for example, a 10V between the line L _3, L _4. Further transistor Qd
The voltage due to the resistance R ₁ and R ₃ and is turned on is applied to the input of the amplifier AP, and applies it to the voltage corresponding, for example, a 15V between the line L _3, L _4.

While the voltage level detection circuit 46a is a line L _3, the voltage between the L ₄ is 13V
Above, that is, when 15V voltage signal is input to the transistor Q ₂ to which is turned on, the 3V or more words 5V or more voltage signal is input to connect the transistor Q ₃ to turn on in parallel, through the parallel circuit Oyobi diode bridge DB emitting diode LEDa connected between the line L _3, L _4, and a transistor Q ₄ for bypassing the further base current of the transistor Q ₃ is turned on when the 8V or more words 10V or more voltage signal is input Te.
Linear light-emitting diode LEDb the other hand the voltage level detection circuit 46b is 8V or more, i.e. 10V or more voltage signals through the transistor Q ₅ and the diode bridge DB to turn on when the input
It is connected between L ₃ and L ₄ .

Therefore the transistor Q ₂ to Q ₅ when the voltage signal 0V off, light emitting diode LEDa, LEDb is in both turned off. Since the voltage signal is only the transistor Q ₃ is turned on when the 5V, the light emitting diode LEDa is turned. That is, in this case, it is possible to display that the outside line is busy.

Then when the voltage signal 10V, the transistor Q ₄ is turned on, the transistor Q ₃ is turned off, the light emitting diode LE
Da turns off. Meanwhile emitting diode LEDb the transistor Q ₅ is turned on is turned on. That is, in this case, an extension busy can be displayed.

The order when the voltage signal to 15V transistor Q ₂ is turned on, light emitting diode LEDa also lit, both light emitting diodes
It is possible to display that the extension and the outside line are busy by lighting the LEDa and LEDb.

FIG. 32 shows a circuit example of the telephone outlet I / F driver unit 28 for generating a five-stage DC voltage signal. In this case, in addition to the 15V transistor Qd circuit and the 20V transistor Qg circuit shown in FIG. The basic operation is the same as that of the circuit in FIG. Correspondingly, the voltage level detection circuits 46a and 46b are configured as shown in FIG.
That is, when the voltage level detection circuit 13V or less that is 5V or 10V voltage signal above 3V in 46a is input, turns on the light emitting diode LEDa only the transistor Q ₆ is turned on operation, 13V
Above, that is, when the voltage signal of 15V or 20V is input, the transistor Q ₇ is turned on and off the transistor Q ₆ is bypassed the base current of the transistor Q _6, the light emitting diode LE
Da is turned off. On the other hand, when the voltage detection level circuit 46b is 8 V or more and 18 V or less, that is, when a 10 V or 15 V voltage signal is input, the transistor Q ₈ is turned on to turn on the light emitting diode LEDb, and when 18 V or more, that is, a 20 V voltage signal is input. Transistor Q ₉ turns on and transistor
Bypass the base current of Q _8, and turns off the transistor Q _8, is obtained so as to turn off the light-emitting diode LEDb.

In other words, in this circuit example, both light emitting diodes LEDa, LEDb are turned off at 0V or 20V voltage signal, light emitting diode LEDa is turned on at 5V voltage signal, light emitting diode LEDb is turned off, both light emitting diodes LEDa, LEDb are turned on at 10V voltage signal, 15V The voltage signal turns off the light-emitting diode LEDa and the light-emitting diode LE
Turn on Db. Therefore, if the 0V voltage signal and the 5V voltage signal are alternately applied, the light emitting diode LEDa blinks while the light emitting diode LEDb is turned off, and the 10V voltage signal and the 15V
If the voltage signal is alternately applied, the light emitting diode LEDb is turned on while the light emitting diode LEDb is turned on, and if the 15V voltage signal and the 20V voltage signal are alternately applied, the light emitting diode LEDa is turned off and the light emitting diode LEDa is turned off. If LEDb blinks and 5V voltage signal and 10V voltage signal are applied alternately, the light emitting diode LEDa is turned on and the light emitting diode LE
You can make Db blink.

In addition, when indicating that it is on hold, if the voltage signal of 0V and 5V or the voltage signal of 10V and 15V is alternately generated from the telephone outlet I / F drive unit 28, the light emitting diode LEDb is turned off or turned off. When the LED is lit,
LEDa can blink.

Example 2 Example 1 was conducted to carry out the lighting of simultaneously emitting diode LEDa with call ringing of the telephone T itself outside line call, also intercom 3 ₁ ... or call during a call extension between, call telephone outlet 10 ₁ ... The sound from the built-in speaker 48 and the lighting of the light emitting diode LEDb are performed at the same time, and the discrimination is made different in the timbre of the ringing sound. In this embodiment, the display by the light emitting diodes LEDa and LEDb is eliminated. Alternatively, the incoming call may be only the ringing of the speaker 48 and the telephone T. In this case, the main device 1 does not require the telephone outlet I / F display drive unit 28 and the sound source signal cutoff coil 27. Further, the telephone outlets 10 ₁ ... Do not require the voltage level detection circuits 46a and 46b and the light emitting diodes LEDa and LEDb.

Third Embodiment In the first and second embodiments, the ringing sound from the speaker 48 is emitted by a sound source signal such as a chime sound created by the sound source generating unit 23. A voice data generating unit is provided, based on a voice selection signal from the control circuit 11, for example, "calling an extension", "calling a door phone", "calling an outside line", and receiving a voice from the telephone outlet 10a with a voice suitable for each incoming call display. You may make it generate | occur | produce. In this case, only the voice may be used, or the light emitting diodes LEDa and LEDb of the busy display may be used in combination.

Embodiment 4 In each of Embodiments 1, 2, and 3 above, the ringing sound from the speaker 48 of the telephone outlet 10 ₁ ... It may be. At this time, the telephone outlet I / F audio amplifier 24 and the extension call relays Ry ₆₁ are not required, and the speaker 48 of the telephone outlets 10 ₁ .

Embodiment 5 The above embodiment has a function of connecting a plurality of sets of internal lines to the main apparatus 1 as shown in FIGS. 1 and 2, and connects telephone outlets 10 ₁ ... Although it is possible to communicate with each other, it is also possible to connect only one internal line. In this case, it is possible to omit a relay related to extension connection and a function related to communication between extensions. A plurality of telephone outlets 10 ₁ ... Are connected in parallel to _one internal line as shown in FIG. 34, thereby enabling use as a parent-child telephone.

[Effects of the Invention] The present invention connects an external line from a telephone station, and, when an incoming signal from the external line is detected, sends an incoming display signal through a control line corresponding to the internal line, and connects the external line to the internal line. A telephone outlet provided with incoming call display means for receiving an incoming call display signal from the main unit connected to the control line and receiving the incoming call display signal from the main device, and displaying an incoming call; A general single telephone which is detachably connected to a telephone connection part of a telephone outlet, and which receives an incoming signal from an outside line, connects an extension connected to the telephone outlet to an outside line, and connects an incoming signal to the telephone outlet. Sending to a single telephone to generate a ringing tone and displaying incoming calls on the incoming call display means provided at the telephone outlet, enabling connection of a general single telephone,
A so-called home telephone system using a general single telephone can be constructed, a telephone can be connected according to the user's preference, and a display at the time of an incoming call can be made by a sound other than the ring tone of the general single telephone, so that an incoming call display is ensured. There is an effect that.

The second invention has a control means for connecting an outside line and a plurality of extensions from a telephone station, and transmitting an incoming call indication signal via a control line corresponding to each extension when detecting an incoming signal from the outside line. Means for determining whether a dial signal is an external call or an internal call; and when the means determines an internal call, a call signal is transmitted through a control line of a called party corresponding to the dialed number, and the called party's extension and the calling party A main unit having a means for connecting an extension and connecting an outside line to a predetermined extension during an outside line call, a telephone connection unit connected to each of the above-mentioned extensions, and receiving an incoming call display signal from the main unit connected to a control line. A telephone outlet provided with an incoming call display means for displaying an incoming call and a calling means for receiving a call signal and performing a call display, and a telephone outlet detachably connected to a telephone connection portion of the telephone outlet. At least a single telephone, and when receiving an incoming call from an outside line, sends an incoming signal to a general single telephone connected to the telephone outlet for non-extension calls to generate a ringing tone, and displays an incoming call on all telephone outlets. Means that an outside line is busy is displayed, and when an extension is called, an incoming call is displayed by the incoming call display means provided at the called telephone outlet. It is determined at least whether or not the extension line is opened and the extension line is opened when the hook is turned on based on the result of the determination. Therefore, in addition to the effect of the first invention, it is possible to communicate between extensions using a general single telephone.

[Brief description of the drawings]

FIG. 1 is an overall circuit configuration diagram of Embodiment 1 of the present invention, FIG. 2 is a circuit configuration diagram of a main device of the above, FIG. 3 is a perspective view of the main device of the same, and FIGS. FIG. 5 is a reduced front view and a reduced side view of the same main device, FIG. 5 is a sectional view for explaining attachment of the same main device, FIG. 6 is a front view of an application example of the same main device, and FIG.
The figure is a perspective view of a decorative panel used for the main device of the above, and FIG.
The figure shows the circuit configuration of the telephone outlet of the above, FIG. 9 (a)
(B) Front and rear views of the telephone outlet,
FIG. 15 to FIG. 15 are flowcharts for explaining the above operation, and FIG.
16, 17, and 18 are time charts for explaining the operation of the above, FIGS. 19 to 22 are flowcharts for explaining the operation of the above, FIG. 23 is a time chart for explaining the operation of the above,
FIG. 24 is a circuit configuration diagram of the holding circuit of the above, FIGS. 25 to 29
The figure is a time chart for explaining the operation of
FIG. 30 is a specific circuit diagram of the telephone outlet I / F display drive unit of the above, FIG. 31 is a specific circuit diagram of the voltage level detection circuit of the above, and FIG. 32 is another example of the telephone outlet I / F display of the above. FIG. 33 is a specific circuit diagram of another example of the voltage level detecting circuit of the above, and FIG. 34 is an overall circuit configuration diagram of Embodiment 5 of the present invention. T: General single telephone, 1 ... Main unit, 2 ... Outside line, 3 ₁
... Door phone, 4 communication line, 5 extension, 33 device body, 10 ₁ telephone outlet, 11 control circuit.

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Hitoshi Fukagawa 1048 Kadoma Kadoma, Matsushita Electric Works Co., Ltd. (72) Inventor Yoshiharu Suzuki 1048 Kadoma Kadoma, Kazuma Matsushita Electric Works Co., Ltd. (72) Yoshinori Suzuki 1048 Kadoma Kadoma Matsushita Electric Works Co., Ltd. (72) Inventor Shozo Tanaka 1048 Kadoma City Kazuma Kadoma Matsushita Electric Works Co., Ltd. (56) References JP-A-61-219251 (JP, A) −41025 (JP, B2)

Claims (2)

(57) [Claims] 1. An external line from a telephone station is connected, and when an incoming signal from the external line is detected, a means for transmitting an incoming call indication signal via a control line corresponding to the internal line and a means for connecting the external line to the internal line are provided. A telephone outlet provided with a main unit, a telephone connection unit connected to the extension, and an incoming display unit connected to the control line for receiving an incoming display signal from the main unit and displaying an incoming call; At least an ordinary telephone that is detachably connected to the connection unit. When an incoming call is received from an external line, the extension connected to the telephone outlet is connected to the external line, and the incoming signal is transmitted to the ordinary telephone connected to the telephone outlet. A ringing tone, and displaying a busy outside line on an incoming call display means provided at a telephone outlet. 2. An external line from a telephone station and a plurality of extensions are connected to each other. When an incoming signal is detected from the external line, a control means for transmitting an incoming call indication signal via a control line corresponding to each extension is provided. Means for judging only whether the dial signal is an external call or an internal call. When the means judges that the call is an internal call, a call signal is transmitted through a control line of the called party corresponding to the dialed number, and the call is made to the extension of the called party. A main unit having a means for connecting a side extension and connecting an outside line and a predetermined extension during an outside line call, a telephone connection unit connected to each of the above-mentioned extensions, and an incoming call display signal from the main unit connected to a control line. A telephone outlet provided with incoming call display means for receiving and displaying an incoming call, and calling means for receiving and displaying a call signal, and removably connected to a telephone connection portion of the telephone outlet; At least an incoming call from an outside line is sent, and when an incoming call is received from an outside line, an incoming call signal is sent to the outgoing ordinary phone connected to the telephone outlet for non-extension calls to generate a ringing tone. The display means indicates that the outside line is busy, and the extension display means that the incoming call is displayed on the called telephone outlet when the extension is called, and whether the outside line is being received, the extension is being called, or the outside line is being used when a single general telephone is hooked off. A telephone system characterized in that at least a determination is made as to whether or not it is possible, and based on the result of the determination, control of opening an external line and opening an internal line is performed at the time of hook-on.