JPH0828902B2 - Telephone system - Google Patents

Description

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

[Background Art] Conventionally, as this type of telephone system, there is a so-called home telephone, which requires a dedicated telephone to be connected as a handset telephone, and a telephone desired by a user to be connected. Could not be done.

There is also a telephone system of this type in which a doorphone is also connected, but because the extension between the main unit and the telephone is a two-wire system, it is a structure that rings the bell of the connected telephone for both intercom calls and external calls. However, there was a problem that the distinctiveness was 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 problems, and an object of the present invention is to know the incoming call state of a telephone outlet, and to connect a normal general single phone and a general single phone. Is to provide a telephone system which enables telephone calls between extension lines.

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

Embodiment 1 FIG. 1 shows the overall configuration of an embodiment of a telephone system of the present invention, in which a main unit 1 is provided with an external line 2 from a telephone station,
The call line 4 to which the intercom 3 is connected is connected as an external line, and a plurality of sets of internal lines including an extension 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.
B contact of the switching contacts 20 ₁₁ ... Of the external line switching relays Ry ₁₁ .
It is connected via 30 ₁ ….

Further, the main unit 1 is provided with a plurality of connection terminals 12 ₁ ... for connecting the communication line 4 of the intercom 3 ₁ ..., and each of the connection terminals 12 ₁ ... has a call signal detection unit 14 ₁ ... of the intercom 3 ₁ ... It is connected to the intercom call circuit 13 via the tone sending portion 15 ₁ ... connect and intercom changeover relay Ry ₂ to switching contact 16.
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 and 18 ₁₂ and a DC cut capacitor 19 ₁ are connected to the a contact of the switching contact 20 ₁ of each external line switching relay Ry ₁₁ . The output of the sound source generation unit 23 is connected to the connection point of the relay contact 17 and the relay contact 18 ₁₁ ... Through a relay contact 21 ₁ of another extension connection relay Ry ₅₁ and a DC cut capacitor 22.

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 via the DC cut capacitor 26 and the relay contact 25 _{1 of the} extension calling relay Ry ₆₁ provided corresponding to each telephone outlet 10 ₁ . It is connected to a connection terminal corresponding to ₁ ... line L ₃ of the control lines 6. The output of the telephone outlet I / F display drive unit 28 is connected to the line L ₃ of the control line 6 via a sound source signal cutoff coil 27 ₁ .

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 sending section 15 _1, ..., Control of the hold circuit 8 and hold sound generating section 29, determination of the incoming call detection signal of the incoming call detection section 7, determination of the ringing signal of the ringing signal detection section 14 ₁ ,. and performs the determination or the like of the dial pulse detection unit 30 ₁ ... or the detection signal of the push-button dial signal receiver unit 31. In the figure, I ₁ ... Are extension current supply sources.

Thus, the main device 1 having the circuit configuration as described above has a circuit housing section for mounting printed circuit boards 200a and 200b in which necessary circuits such as the above-described electronic circuits and relays are wired in the center as shown in FIG. On the back side of one side, a terminal part 32a for connecting a low power line such as an outside line, an internal line, a communication line is exposed, and on the back side on the other side, a low voltage side terminal part 32b for connecting a low voltage power supply line or the like. And a mounting frame 35 in which the central projecting portion 33a of the device main body 33 is fitted into the central opening window 34 from the back and the device main body 33 is fixed with screws or the like. It is formed by the size module of the wiring device, and its size is set to, for example, four sizes, and the depth from the mounting frame 35 can be stored in the ready-made switch box 36 as shown in FIG. As dimensions. Further, the connecting means for connecting to the wiring device, the mounting hole for the switch box 36, the fitting hole for the scissors, and the like have the same structure as a normal mounting frame.

FIG. 4 shows an embedding hole 38 formed by boring the main device 1 in the construction 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. 5 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. 6 shows the 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 respectively 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, 46b are turned on in response to the voltage signal from the main unit 1, and the busy signal can be displayed by the light emission of the red light emitting diode LEDa and the green light emitting diode LEDb according to the external line and the internal line. Has become. That is,
In the present embodiment, the voltage signal sent from the main unit 1 through the control line 6 corresponds to the incoming call display signal, and the incoming call display signal causes the light emitting diode LEDa of the voltage level detection circuit 46a serving as the incoming call display means to operate. The light is turned on and the incoming call of the outside line is displayed. The speaker 48 sounds by the sound source signal transmitted by superimposing the main apparatus 1 to the line L _3, L ₄ in what constitutes the calling means, notifying an incoming call and call the extension 5 of the door phone 3 ₁ ... You can do it. That is, in this embodiment, the sound source signal is the calling signal.

Figure 8 (a) (b) shows a telephone outlet 10 ₁ ... external construction diagram of the three off-the-shelf wiring devices in this embodiment
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 adjusting volume 49 is slidably exposed, and the sound emitting 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. 9 shows the configuration of the control program of the main unit 1. The major processes are divided into three groups: initialization at system startup, input processing, and output processing. Figure 10 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 the control circuit 11 to manage the state of the general single line telephone T connected to the telephone outlet 10 ₁ ... as a state variable,
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 of controlling the state variable held in the memory of the control circuit 11 in accordance with the occurrence of various input events, and its flowchart is shown in FIG. As the input processing, the hook-on / off processing shown in FIGS. 12 (a) and (b), the dial input processing shown in FIG. 13, the outside line incoming processing shown in FIG. 14 (a), and FIG. It is classified into the intercom calling process 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 ... (or push button dial signal receiving unit 31) detects. Then, the control circuit 11 judges that the hook-off is the first rise of the detection signal shown in FIG.
The hook-off process of FIG. 12 (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 the extension 5 is not called, the outside call is received, or the intercom is called, the extension 5 connected to the telephone set T is connected to the outside line 2 at the same time as 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 General single telephone T that is connected to release 4 if not in use
Process the resting state. When the dial operation is performed from the hook-off to the hook-on and the dial pulse P is detected as shown in FIG. 15 (a), the control circuit 11
15 detects the dial data shown in FIG. 15 (c) from the dial pulse P, and performs the holding process, the intercom calling, etc. based on the dial data. That is, as shown in FIG. 13, it is judged 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 call is made as it is. Only the processing, the release of the hold, and the calling of the intercom are determined. 15th
FIG. 6B shows a detection period from hook-off to hook-on.

Explaining further, the control circuit 11 counts the interval time from the first dial operation to the second dial operation, and if there is no second dial operation within a certain period of time, it is determined that the call is not an outside line, and based on the dial data. It does the processing. In this embodiment, the dials from "1" to "5" are 1 for the telephone outlets 10 ₁ of each internal line connected to the main unit 1.
Correspond to one-to-one, dial "7" is for intercom calling, and dial "0" is on hold while dial "0" is on hold while hold circuit 8 detects that a call is in progress. Allocation such as cancellation is made, and the control circuit 11 performs the input processing according to this allocation.

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. 14 (a).
Set the incoming flag as shown in. That is, FIG. 16 (a)
As shown in FIG. 16, the incoming flag is set as shown in FIG. 16 (b) at the rising edge of the first incoming call detection signal of the incoming call detecting section 7, and a fixed 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. 14 (b) is there. That is, as shown in FIG. 17 (a), when the push button of the intercom 3 ₁ ... Is operated and the calling signal is detected by the calling signal detecting section 14 ₁ .
The control circuit 11 sets the intercom calling flag at the rising edge of the detection signal, and resets the flag when the hook-off of the general telephone T that is further connected is detected as shown in FIG. 17 (c). . If the hook-off detection does not exceed a predetermined time-out period, the flag is also reset. Thus, the input processing is performed as shown in FIG.

On the other hand, the output process is the connection process as shown in FIG.
There are incoming call display processing and busy display processing.
As shown in Fig. 19, it is determined whether an outside line call is in progress. If there is no outside line call, the changeover contact 20 ₁ ... of the outside line changeover relay 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
Is connected to the b contact side, and the outer wire 2 and the inner wire 5 are connected.

Then, 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 . The internal circuit 1 and the extension 5 can be connected. 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, when an incoming call signal from the outside line 2 is detected as shown in FIG. 20, the control circuit 12 sets an outside line incoming call alert sound, and relay contacts 25 ₁ ... of the extension calling relay 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 judged whether or not the ringing signal of the intercom 3 ₁ ... is detected, and if there is the detection, the incoming call alert sound of the intercom 3 ₁ ... is set and the extension call relay Ry
_Turn on relay contact 25 ₁ ... of ₆₁ …, and extend connection relay Ry ₅₁ ,
Turn off relay contacts 21 ₁ and 21 ₂ of Ry ₅₂ . If there is no detection, it is determined whether there is an extension call. If an extension call is detected, the extension ring tone is set and the extension call relay is set.
The relay corresponding to the extension of the called side of Ry ₆₁ ... is activated, the relay contact 25 ₁ ... is 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 extension connection relays Ry ₅₁ , Ry ₅₂
Turn off the relay contacts 21 ₁ and 21 ₂ of. If it is not on hold, a silent set is performed and the relay contact 25 _{1 of} extension call relay Ry ₆₁ … and relay contact 21 _{1 of} extension connection relay Ry ₅₁ , Ry ₅₂
21 Turn off 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. 21, 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 is lit. 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 intercom is busy with the intercom 3 ₁ , the corresponding LED is turned on during the extension call. If not, it is determined whether or not the extensions are busy. If it is inside, the light emitting diode LEDb is turned on, and if the extensions are not busy, the light emitting diode LEDb is turned off.

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

When an incoming call signal is received from the outside line 2, the control circuit 11 determines the incoming call from the incoming call detection signal from the incoming call detection unit 7, sets the incoming call alert sound, and sets the extension call relay Ry ₆₁ ...
Turn off the relay contacts 25 ₁ ... of the extension connection relays Ry ₅₁ , Ry ₅₁
The relay contacts 21 ₁ and 21 ₂ are turned on. At this time, since the outside line switching relay Ry ₁₁ ... Connects the switching contact 20 ₁ ... To the b contact side, the ringing tone from the telephone office is generated by each telephone outlet 10 ₁ ...
Will be notified from the general single telephone T connected to. At the same time, when the reception of the incoming signal is detected, the above call is made, and a voltage level detection circuit 46a for controlling the light emitting diode LEDa with the DC output voltage from the telephone outlet I / F display drive unit 28 to indicate that the outside line is busy. 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. When the handset of the general single line telephone T is taken connected telephone receptacle 10 ₁ ... in a non-communication state with respect to the outside line 2 from this state, hook dialing pulse detection unit 30 detects the hooking off, extension can call If it is in a state, the switching contact 20 ₁ ... of the outside line switching relay Ry ₁₁ ... corresponding to the telephone outlet is switched to the a contact on the extension side and the relay contact 18 ₁₂ ... of the extension connection relay Ry ₄₁₂ ... is turned on to generate the sound source. During an external line call such as "Pop-up ..." from the generation unit 23, a sound source signal indicating a state where the internal line can be used is transmitted to the relay contact 21 _{1 of} another extension connection relay Ry ₅₁ and the relay contact 18 ₁₂ ... Send it to the extension 5 corresponding to the telephone outlet through the switching contact 20 ₁ ...
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.
If there is 3 ₁ ... calls from, the call signal is detected by a corresponding call signal detector 14 ₁ ..., the control circuit 11 determines that there was 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. Further, the relay contacts 18 _{11 of the} extension connection relays Ry ₄₁₁ are turned on to enable the intercom communication circuit 13 to be connected to the extension 5, and the relay contacts 21 ₁₂ of the extension connection relay Ry ₅₂ are turned on. Furthermore, the relay contact of the extension calling relay Ry ₆₁ … 25 ₁ …
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. On the other hand, the corresponding backtone transmitter 15 is turned on by the control circuit 11 on the side of the doorphone 3 ₁ that has called the call, and the sound source signal from the sound source generator 23 is input as a backtone to produce a speaker for the doorphone 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 using the outside line, it is also indicated by lighting of the light emitting diode LEDa. Also, if the outside line is not in use, the telephone outlet that connects the telephone T that picks up the handset 10 ₁ ...
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. The control circuit 11 judges that it is an extension call when only the dial data of the extension call is detected within a predetermined time when the handset is picked up with the outside line 2 open, and the telephone outlet to which the telephone T is connected is determined. 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. Thus the sound source signal amplified by the telephone outlet I / F amplifier 24 drives the telephone outlet 10 ₁ ... speaker 48 which is invoked to notify the extension call example sound of "grunt". At the same time, the control circuit 11 controls the telephone outlet I / F display drive section 28 to set its output DC voltage to a level at which the respective voltage level detection circuits 46b are turned on, and to display the extension of each telephone outlet 10 ₁ . The light emitting diode LEDb is turned on.

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 the connection state via the relay contacts 21 ₁ of the extension connection relay Ry ₅₁ to extension 5. Now, if the other telephone T is handset while the extension lines 5 are not busy with the outside line 2, the control circuit 11 causes the switching contact of the outside line relay Ry ₁₁ ... Corresponding to the telephone outlet 10 ₁ . Since 20 ₁ ... Is connected to the outside line 2 side, the outside line dial tone is heard from the handset of the telephone T.

Further, if the outside line 2 is busy, the control circuit 11 connects the switching contact 20 ₁ of the outside line relay Ry ₁₁ corresponding to the telephone outlet 10 ₁ to the side of the extension line 5 or the corresponding extension connection relay. since turning on the relay contact 18 ₁₁ ... of Ry ₄₁₁ to handset of the telephone T so that the sound by the sound source signal in the extension use output from the sound source generating unit 23 can be heard.

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, a predetermined time as shown in Figure No. 22 (b), the control circuit 11 and a call to the extension or intercom if there is no input of the next dial data within for example 3 seconds determines As described above, when the next dial data is input within an interval of 3 seconds as shown in FIG. 22 (a), the control circuit 11 judges that the outside line is called and the outside line 2 is called without switching the extension side. The connection state with the telephone T is held. 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.
46a sets the control circuit 11 to a level that on operation, turns on the respective telephone outlet 10 ₁ ... emitting diodes LEDa of
Indicates that an outside line is busy.

By the way, when it is desired to hold the call during connection with the outside line 2, the hold circuit 8 may be operated.

Next, the operation of the hold circuit 8 will be described. First, the handset of the telephone set T picks up when calling the outside line 2,
When the dial is operated as shown in FIG. 23, a current flows through the light emitting diode LED ₁ of the photocoupler PH ₁ provided in the hook / dial pulse detection unit 30 inserted in the line L ₂ , and the second
As shown in Fig. 4 (a), a current flows according to the dial pulse. At this time, the photocoupler PH inserted in the other line L _1
No current flows through the _second light emitting diode LED ₂ as shown in FIG. 24 (b). Therefore, the control circuit 11 receiving the outputs of both photocouplers PH ₁ and PH ₂ determines that the call is being made. When the handset of the called telephone is picked up, and reversed polarity external 2, line L ₁ is H, linear L ₂ is L, a current flows through the light emitting diode LED ₂ of the photocoupler PH _2, the other photo-coupler No current flows through the light emitting diode LED ₁ of PH ₁ . That is, it indicates that the telephone is in a call state.

When an incoming call is received from the outside line 2, the light-emitting diodes LED ₁ and L ₁ are alternately turned on and off according to the incoming signal as shown in FIGS.
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 the call is in progress in both cases of making a call and receiving a call, as shown in FIG. 26 (a) or 27.
As shown in the figure (b), photo coupler PH ₁ or photo coupler 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 validity period of this flag is set to 3 seconds, and within 3 seconds, the output of the photocoupler PH ₁ or PH ₂ opposite to the flag set to H becomes H as shown in FIG. 26 (b) or 28 (a). If the state continues for 1 second, the control circuit 11 determines that the call is in progress as shown in FIG. 26 (c) or FIG. 27 (c). Since the judgment is made as shown in FIG. 26 and FIG. 27, the call judgment can be performed even when the lines L ₁ and L _{2 of the} outside line ₂ are reversely connected.

In the case where a call is put on hold while it is determined that a call is in progress (as shown in FIG. 28 (a)), the number assigned to the hold, for example, "0", is first set by the dial operation of the telephone set T.
Outgoing. When this dial operation is performed, the line L ₂
During the dial pulse, the voltage level of L becomes L as shown in FIG. 28 (b), and the hook / dial pulse detector 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. Figure 28 (c)
Shows the output of the photocoupler PH ₂ and the holding state in FIG.

By the way, when the hold is set, the hold sound generator 29 makes a hold sound and sends it 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 display drive unit 28 so as to blink.
A blinking display indicates that the call 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 display drive unit 28 and the voltage level detection circuits 46a and 46b are composed of circuits as shown in FIGS. 29 and 30, and the telephone outlet I / F display drive unit 28 outputs four types of voltages, for example. Level signal can be output.For example, when the transistor Qa is turned on, the amplifier
The input of AP is dropped to the ground, 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 0V, and the transistor Qb is turned on. And a voltage obtained by dividing the power supply voltage Vc by resistors R ₁ and R ₂ are applied to the input of the amplifier AP, and the bias of the transistors Qe and Qf is controlled by the corresponding output of the amplifier AP. Output voltage between ₃ and L ₄ . And turn on the transistor Qc in the same manner as the resistor R ₁
A voltage by R ₃ 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. When the transistor Qd is further turned on, the voltage generated by the resistors R ₁ and R ₃ is applied to the input of the amplifier AP, and the corresponding voltage, for example 15 V
Is applied between the lines L ₃ and 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.

Next, when the voltage signal is 10 V, the transistor Q ₄ turns on, so the transistor Q ₃ turns off and the light emitting diode LE
Da goes out. On the other hand, since the transistor Q ₅ is turned on, the light emitting diode LEDb lights up. 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 line and the outside line are busy by turning on LEDa and LEDb.

FIG. 31 shows a circuit example of the telephone outlet I / F display driver unit 28 in the case of generating a five-stage DC voltage signal. In this case, in addition to the 15 V transistor Qd circuit shown in FIG.
The transistor _Qg circuit for 0V is added, and the basic operation is the same as 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 46a receives a voltage signal of 3V or more and 13V or less, that is, a 5V or 10V voltage signal, the transistor Q
Only ₆ turns on and turns on the light emitting diode LEDa, 1
3V 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, a light emitting diode
LEDa 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 is turned on to bypass the base current of the transistor 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.

Also, when displaying that it is on hold, if a voltage signal of 0 V and 5 V or a voltage signal of 10 V and 15 V is generated alternately from the telephone outlet I / F drive unit 28, the light emitting diode LEDb is turned off or With the light on, light-emitting diode
LEDa can blink.

Example 2 Example 1 is adapted to perform the lighting of simultaneously emitting diode LEDa the outside line call display with call ringing of the telephone T itself, also intercom 3 ₁ ... or incoming call indicator when a call extension between calls telephone performed by turning on the Hatsuna and light emitting diode LEDb from outlet 10 ₁ ... internal speaker 48, also had performed different sounds etc. ringing tone the identification, in the present embodiment light emitting diodes LEDa is
The display by the LEDb may be eliminated and the incoming call display may be only the ringing of the speaker 48 and the telephone T. In this case the main device 1
In this case, the telephone outlet I / F display drive unit 28 and the sound source signal cut-off coil 27 become unnecessary. Also telephone outlet 10 ₁
..., the voltage level detection circuits 46a and 46b and the light emitting diodes LEDa and LEDb are not required.

Embodiment 3 In the above-described Embodiments 1 and 2, the ringing sound from the speaker 48 is created by a sound source signal such as a chime sound created by the sound source generation unit 23. Instead of the sound source generation unit 23, a voice generated by voice synthesis or the like is used. Aiming at the data creation section, based on the voice selection signal from the control circuit 11, for example, "extension call", "doorphone call", "outside call", and voices suitable for the respective incoming call indications are received from the telephone outlet 10 ₁ ... It may be generated. In this case, only the voice may be used, or the light-emitting display of the light-emitting diodes LEDa and LEDb in the busy table may be used together.

Embodiment 4 In each of Embodiments 1, 2, and 3 above, a ringing sound from the speaker 48 of the telephone outlet 10 ₁ ... Is used to display an extension call or an incoming call to the intercom, but only the light emission display by the light emitting diodes LEDa and LEDb is performed. Is also good. 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 .

However to have a wake-up call function to the control circuit 11 of the above embodiments, the telephone when a predetermined dial number is sent from the outlet 10 ₁ ... connected to the general telephone T, control the registration mode wake-up time circuit 11 Of the setting permission signal tone is sent to the telephone set T through the extension 6 and the dial number sent from the telephone set T after the transmission of the signal tone is registered in the built-in memory as the set time and the telephone outlet number of the ringing target. You may do it.
In this case, the control circuit 11 has a clock function, and when the registered time comes, the sound source generating unit 23 is operated, and the telephone outlet 10 ₁
Are operated by operating the general telephone set T or the speaker 48 connected to... Of course, if the sound signal of the sound source generator 23 is a melody sound signal, a pleasant wake-up can be induced.

If the capacity of the built-in memory of the control circuit 11 is increased, registration can be performed corresponding to the number of connected telephone outlets, and wake-up calls can be made individually.

EFFECTS OF THE INVENTION The present invention is mainly connected to a plurality of sets of internal lines, each of which is a set of an extension for communication voice and a control line for signal of two lines, an outside line to a station, and a communication line to a doorphone. A device, a telephone outlet which is connected to the main device through an internal line and has a telephone connecting portion for connecting a general single telephone to the extension of the internal line, and is detachably connected to the telephone connecting portion of the telephone outlet. The main unit consists of at least a general independent telephone, and when the main unit detects an incoming call signal from an outside line, the main unit sends out an incoming call display signal through a control line paired with each extension line, and a dial signal from each extension line is an outside line. A means for determining whether the call is an outgoing call or an extension call, and when the determination by the means is for an extension call, a call signal is sent through the control line of the called side corresponding to the dial signal and the called side extension and the calling side extension are connected. connection And a means for connecting an outside line and a predetermined extension line during an outside line call, and the telephone outlet has an incoming call display means for receiving the incoming call display signal sent from the main device through a control line and displaying an incoming call. , A calling means for receiving the ringing signal sent from the main unit through the control line and displaying the ringing, so that the incoming call display for distinguishing the incoming call from the extension line and the incoming call to the outside line can be displayed on the telephone outlet. It can be performed by the incoming call display means, therefore, without using a special interface circuit or a telephone having a dedicated circuit, by simply connecting a commercially available general-purpose single telephone to the telephone connection portion of the telephone outlet, It is possible to make internal calls and external calls between general independent telephones with the same function as that of a button telephone, and even if it is an indoor power outlet that connects electrical appliances. , Users come to buy a general purpose of the general single line telephone of design preference, since it is possible to build systems by simply connecting to the telephone connection of the telephone outlet,
In particular, even a person who has no knowledge of the functions of the telephone can easily connect the telephone having a desired design.

[Brief description of drawings]

FIG. 1 is an overall circuit configuration diagram of Embodiment 1 of the present invention, FIG. 2 is a circuit configuration diagram of the same main device, FIG. 3 (a) is a front view of the same main device, and FIG. 3 (b). Is a horizontal sectional view of the same main device, FIG. 3 (c) is a partially cutaway rear view of the same main device, FIG. 3 (d) is a vertical sectional view of the same main device, and FIG. FIG. 5 is a front view of an application example of the above main device, FIG. 6 is a perspective view of a decorative panel used for the above main device, and FIG. Circuit diagram of outlet, FIGS. 8 (a) and 8 (b) are a front view and a rear view of the same telephone telephone set, and FIGS. 9 to 14 are flowcharts for explaining the operation of the same, FIG. 15 and FIG. , FIG. 17 is a time chart for explaining the above operation, FIGS. 18 to 21 are flowcharts for explaining the same operation, and FIG. 22 is a time chart for explaining the same operation as the above. 23 FIG circuit configuration diagram of a pending circuit of the same, FIG. 24 through FIG. 28 is a time chart for explaining the operation of the hold circuit of the same telephone outlet Figure 29 is same as above
Specific circuit diagram of the I / F display drive unit, FIG. 30 is a specific circuit diagram of the voltage level detection circuit of the above, FIG. 31 is a specific circuit diagram of another example of the telephone outlet I / F display drive unit of the same, No. 32 The figure is a concrete circuit diagram of another example of the above voltage level detection circuit. T ... General single phone, 1 ... main unit, 2 ... outside line, 3 ₁
… Door phone, 4… telephone line, 5… extension, 33… device body, 10 ₁ … telephone outlet, 34… central opening window, 35
... Mounting frame, 36 ... Switch box, 37 ... Construction materials.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Yoshinori Suzuki, 1048, Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) Shozo Tanaka, 1048, Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works, Ltd. (72) ) Inventor Hitoshi Fukagawa 1048 Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works, Ltd. (72) Yoshiharu Suzuki Yoshiharu Suzuki Kadoma, Osaka Prefecture 1048, Kadoma Matsushita Electric Works, Ltd. (72) Kiyotaka Takehara, Kadoma, Osaka Prefecture 1048 Kadoma Matsushita Electric Works Co., Ltd. (72) Inventor Yoshiyuki Choda, Kadoma City, Osaka Prefecture 1048 Kadoma Matsushita Electric Works Co., Ltd. (72) Inventor Akihiko Hamada 1048 Kadoma, Kadoma City, Osaka Pref. 56) References JP-A 61-219251 (JP, A) JP-A 59-23698 (JP, A) JP-A 53-134306 (JP, A) JP-A-59-86393 (JP, A) JP-A-61-101978 (JP, A) JP-A-61-174859 (JP, A) Actually developed Shou-50-43610 (JP, U)

Claims (1)

[Claims] 1. A main unit to which a plurality of sets of internal lines, each of which is a set of an extension line for call voice and a control line for signal of two lines, an outside line to a station, and a communication line to an intercom, are connected. A telephone outlet provided with a telephone connecting portion connected to the main unit via an internal line and connecting a general single telephone to the extension of the internal line, and a general single telephone detachably connected to the telephone connecting portion of the telephone outlet And at least consists of
Control means for transmitting an incoming call display signal through a control line paired with each extension when an incoming call signal is detected from the outside line, means for determining whether the dial signal from each extension line is an outside call or an extension call, and the means. When the extension is called, the call signal is transmitted through the control line of the called side corresponding to the dial signal, the called side extension and the calling side extension are connected, and the outside line and the predetermined extension line are connected during the outside call. The telephone outlet is equipped with an incoming call display means for receiving the incoming call display signal sent from the main device via the control line and displaying the incoming call, and a telephone outlet sent from the main device via the control line. And a calling means for receiving the calling signal and displaying a calling display.