JP2803781B2 - 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 system, a dedicated telephone must be connected as a child telephone, and a telephone desired by a user is connected. Could not. There is also a telephone system of this type in which a door phone is also connected. However, the extension between the main unit and the slave phone is a two-wire wiring, and the bell of the slave phone connected to both the calling of the door phone and the incoming call of the outside line sounds. Therefore, there is a problem that the discriminability is poor. Further, in this conventional system, 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 child 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 enable a general telephone to be used as a sub-telephone. An object of the present invention is to provide a telephone system capable of identifying a state during a call. [Disclosure of the Invention] The present invention connects an outside line from a central office or a private branch exchange, a call line from a door phone, and an extension line for connecting a slave phone, and connects an outside line with an extension line or between extensions, or a call line of a door phone and an extension line. Means for transmitting a communication status signal to an outside line via a control line corresponding to the extension, and means for transmitting a communication status signal between the intercom and the slave phone or between the slave phones via the control line corresponding to the extension. A main unit, a communication state signal connected to the extension and connected to a telephone connection unit for connecting a slave telephone, and a communication state signal connected to the control line and receiving a communication state signal from the main apparatus and receiving a call and a call And a telephone outlet provided with display means for setting the display state differently during a call and during a call. Hereinafter, the present invention will be described with reference to examples. FIG. 1 shows the entire telephone system of the present invention.
An external line 2 from a central office or a private branch exchange and a communication line 4 to which a door phone 3 ₁ ... Are connected are connected to the main unit 1 as external lines. Further, a plurality of sets of internal lines including an extension 5 and a control line 6 are provided. Connected. Each of the internal lines is connected to a telephone outlet 10 ₁ ... For connecting a sub telephone set T composed of a general telephone. FIG. 2 is a circuit block diagram of an embodiment of the main apparatus 1. In the lines L ₁ and L ₂ constituting the outside line ₂ , an incoming signal detecting section 7 for detecting an incoming signal, a hold circuit 8, and a push button The switching contacts 20 of the external line switching relays Ry ₁₁ ... Provided respectively for the four-line telephone outlets 10 ₁ ... Provided for connecting to the coupling transformer 9 for extracting a signal and for connecting to the internal line. ₁₁ ... b contact and hook / dial pulse detector 30
₁ … connected. The main device 1 includes a doorphone 3 ₁ ... connection terminal 12 ₁ ... terminal portion was plurality of connecting a call line 4, the connection terminals 12 ₁ ...
Are connected to a call signal detecting unit 14 ₁ ... And a back tone transmitting unit 15 ₁ ... Of the intercoms 3 _{1, respectively,} and are connected to the intercom communication circuit 13 via the switching contact 16 of the intercom switching relay Ry ₂ . The intercom communication circuit 13 includes extension connection relays Ry ₄₁₁ , Ry _412, relay contacts 18 ₁₁ , 18 _12, and DC cut provided corresponding to the relay contact 17 of the intercom connection relay Ry ₃ and the telephone outlets 10 ₁ ,. Are connected to the switching contacts 20 ₁ of the external line switching relays Ry ₁₁ via contact capacitors 19 ₁ . Relay contact 17 and relay contact 18 ₁₁ …
Connection point to another extension connection relay Ry ₅₁ relay contact 21 ₁
And the output of a sound source generator 23 via 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 capacitors 19 ₁ of the relay contacts 18 ₁₁ . Telephone outlet I / F audio amplifier unit extension call relay Ry ₆₁ ... relay contact 25 which output is provided to correspond to the DC blocking capacitor 26 to the respective telephone outlet 10 ₁ ... 24 ₁ ...
It is connected to a terminator connection terminal corresponding to each telephone outlet 10 ₁ ... line L ₃ of the control line 6 of the through. 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 determination of the detected push button dial 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 current sources for extension. Thus, in the telephone system of the present invention, the telephone outlet 10 ₁
A modular telephone 40 is connected to a sub telephone T, which is a general telephone, and a connection terminal 12 ₁ ... Intercom 3 ₁ ... Is connected to complete the system. call connection between telephone T, or communication connection between the outside line 2 and the child telephone T, even a call connection to the door intercom 3 ₁ ... and the child phone T, the call invocation, or carried out by detecting the outside line call. At the same time, a communication state signal indicating a communication state such as a call connection, a call call, an incoming call from an outside line, etc. is transmitted to the telephone outlets 10 ₁ ... Via the control line 6 under the control of the control circuit 11. The circuit that sends out this communication status signal is the telephone outlet I /
The F display drive unit 28 includes a circuit as shown in FIG. That is, the transistors Q ₁ , Q ₂ , Q ₃ , and Q ₄ driven by the control signal of the control circuit 11 are connected to the voltage dividing resistors R ₂ ,
Connected in series with R ₃ , R ₄ , R ₅ , these transistors Q ₁ -Q ₄
Changing the resistance value connected selected and by the on-resistance R ₁ in series one to of the, to switch the voltage value of the divided output voltage signal of the voltage was further impedance conversion by the operational amplifier 32 The signal is applied to the control line 6 and transmitted as V _DC . That when to turn on the transistor Q ₁ as shown in FIG. 4 the lowest voltages V ₁ to (C ₁ terminal "H"), but also when to turn on the transistor Q ₂ (C ₂ pin "H") At the next lower voltage V ₂ , when the transistor Q ₃ is turned on (C ₃ terminal “H”), then at the next lower voltage V ₃ and when the transistor Q ₄ is turned on (C ₄ terminal “ H ") no voltage
And it outputs a V _4. A sound source signal output through the telephone outlet I / F amplifier 24 is also superimposed on the control line 6. On the other hand, the telephone outlets 10 ₁ ... To which the control line 6 from the main unit 1 is connected are connected to the modular jacks 40 connected to the lines L ₁ and L ₂ of the extension 5 as shown in FIG. To the control line 6 via the capacitor Ca and the variable resistor VR.
33 that reproduces the sound source signal sent through
And a display circuit 34 for driving the light emitting diodes LEDa and LEDb for discriminating the voltage between the lines L ₃ and L ₄ of the control line 6 and displaying the communication state. The speaker 33 can notify the incoming call from the intercom 3 ₁ and the call of the extension 5 by the above-mentioned sound source signal, and is superimposed on the control line 6 under the control of the control circuit 11 when the extension call is in progress. It is designed to play call audio. Display circuit 34 intended to discriminate voltage superimposed on the control line 6, the Zener diode ZD ₁ is voltages V ₁ 'is a Zener voltage between the voltages V ₁ and V ₂ as shown in FIG. 4 becomes conductive Transistor Qa to turn on
When the transistor Qb is turned on respectively when the voltage V ₂ 'Zener diode ZD _2, ZD ₃ is a zener voltage conduction between the voltage V ₂ and V _3, Qc and the voltage between the voltage V ₃ and V ₄ comprises a transistor Qd to V ₃ 'is turned on when the Zener diode ZD ₄ is a Zener voltage conducts, in parallel connected transistors Qb to the base emitter circuit of the transistor Qa,
When the transistor Qb is turned on, the base current of the transistor Qa is bypassed, and the transistor Qa is connected in parallel with the transistor Qd, and the light emitting diode LEDa is connected in series with this parallel circuit so that either the transistor Qa or Qd is turned on. Then, a light emitting current is caused to flow through the light emitting diode LEDa to emit light, and further, a light emitting diode LEDb is connected in series to the transistor Qc, and the transistor Qc
When is turned on, a light-emitting current is supplied to the light-emitting diode LEDb to emit light. Thus, the control circuit 11 of the main device 1 continuously or intermittently outputs the voltage signals V _DC of the voltages V _{1 to} V ₄ through the telephone outlet I / F display drive unit 28 and the choke coils 27 ₁ . To the control line 6. In other words, in the standby state where there is no call or call,
A voltage signal V _DC of V ₁ is applied to the control line 6 and transmitted as shown in a period from t _{0 to} t _{1 in} FIG. This time is not any on of transistor Qa~Qd the telephone outlet 10 ₁ ... display circuit 34, both light emitting diodes LEDa, LEDb remains is turned off. Now telephone call state is detected, the control line via a telephone outlet I / F display drive unit 28 under the control of the control circuit 11 as shown by the period t ₂ -t ₃ of FIG. 6 in the main device 1 6 alternately applies and sends the voltage signals V _DC of the voltages V ₁ and V ₂ . Therefore, the transistor Qa of the display circuit 34 of the telephone outlets 10 ₁ ... Repeatedly turns on and off to blink the light emitting diode LEDa to indicate that the telephone is being called. Now, when the telephones enter a talking state, the voltage signal _VDC applied and transmitted to the control line 6 through the telephone outlet I / F display drive unit 28 under the control of the control circuit 11 is changed during the period of t ₁ -t _{2 in} FIG. is obtained as a continuous signal V _2, as shown, telephone outlet 10 ₁ ... light emitting diode LEDa is continuously turned on in accordance with,
Indicates that you are on a phone call. Next, when the intercoms 3 ₁ ...
Telephone outlet I / F display drive unit 28 under the control of the control circuit 11 as shown by the period t ₄ -t ₅ in FIG choke coil 2
The voltage signals V _DC of the voltages V ₁ and V ₃ are alternately applied from the main device 1 to the control line 6 through 7 ₁ . Thus transistors Qa, Qb and Qc of telephone outlet 10 ₁ ... display circuit 34 is applied period of the voltage V ₃ are both turned on,
The light emitting diode LEDa does not light, and the light emitting diode LEDb lights. Thus it will be emitting diode LEDb flashes during the t ₄ -t _5, to indicate that is under the intercom call. When a call to doorphones 3 ₁ … is started,
Is obtained as a continuous signal of the voltage V ₃ as a voltage signal V _DC applied sent to the control line 6 under the control of the control circuit 11 of the main device 1 is shown in the period t ₃ -t ₄ of FIG. 6, the result display The light emitting diode LEDb of the circuit 34 is continuously lit to indicate that the door phone is in communication. Similarly, when a door phone call is made during a telephone call, voltage signals V _DC of voltages V ₄ and V ₁ are alternately applied and transmitted from main device 1 to control line 6 as shown by t ₆ -t ₇ in FIG. Let it.
For this reason, the transistors Qa to Qd of the display circuit 34 of the telephone outlets 10 ₁ ... Turn on and off, and the light emitting diodes LEDa and LEDb
Flashes together to indicate that a telephone call or a door phone call is in progress. The voltage signal V _DC for applying sent to the control line 6 from the main unit 1 when in the intercom call is detected during the telephone call is a continuous signal V ₄ of t ₅ -t ₆ of FIG. 6, the display circuit 34 The two light emitting diodes LEDa and LEDb are continuously turned on. Further, when there is a telephone call during a door phone call, the main unit 1 controls the voltage signals V ₃ and V ₄ under the control of the control circuit 11.
_DC to the application sends to the control line 6 alternately as shown in t ₇ after a sixth view. Therefore, the light emitting diode LEDa of the display circuit 34
Flashes, and the light-emitting diode LEDb lights continuously. Similarly, if there is a door phone call during a telephone call,
Applying sends a voltage signal V ₂ and V ₄ under the control of the main unit 1, the control circuit 11 to the control line 6 alternately as shown in FIG. 7, flashing light-emitting diode LEDb display circuit 34, a light emitting diode
Turn on LEDa continuously. In this manner, the communication state can be displayed by the lighting state of the light emitting diodes LEDa and LEDb of the telephone outlets 10 ₁ ..., So that a general telephone can be used as the slave telephone T. In addition, with light emitting diode LEDa
The emission color of the LEDb may be made different to enhance the discriminating power. In addition, it is needless to say that the blinking cycle is set to about 0.1 to 1 second so that the blinking can be recognized when viewed. By the way, in the above-mentioned telephone system, the number of intercoms 3 ₁ ... Is determined at the time of designing the system. Therefore, when the user actually uses the telephone system, the number of the intercoms may be too large or too small to be an optimal system. Because there is, the eighth
To be able to mount intercom extension adapter 35 as shown in figure, in the Yo can connect multiple intercom 3 ₁ ... to one of the connection terminals 12 of the main apparatus 1 via the intercom extension adapter 35 Good. In this case, a power supply terminal 36 is provided in addition to the connection terminal 12, and power can be supplied to the intercom expansion adapter 34 from the power supply terminal 36. Doorphone extension adapter 34
As shown in FIG. 9, a connection terminal portion 37 for connecting to the connection terminal 12 of the main device 1 and a power supply terminal 38, and a door phone connection terminal portion 39 for connecting the communication line of each door phone 3 ₁ .
_1, 39 comprises a _2, and detects the voltage change of the connected intercom 3 ₁ ... call line when the call button is pressed transistor
Tr ₁ and Tr ₂ , a flip-flop FF that inverts the output according to the state of the transistors Tr ₁ and Tr ₂ , and a transistor Tr ₃ that is driven by the output of the flip-flop FF and operates a relay RY connected in series , the connecting terminal portions 37 intercom 3 ₁ or 3 ₂ call line call button has been pressed side to the connection terminals 12 of the main apparatus 1 by the relay contact r of the switching of the relay RY
To connect through. Thus, for example when the doorphone 3 ₁ call button is pressed, it decreases the voltage of the intercom connection terminal portions 39 _1, transistor Tr ₁ is turned off, the output of the flip-flop FF becomes "H". And the transistor Tr ₃ is turned on by the output, the relay is activated RY, the relay contact r a normally closed contact NC from normally closed contact NO side switching intercom connection terminal portion 39 ₁ a relay contact r
Through the connection terminal 37. Door phone 3 ₁ intercom extension adapter 35 is connected as described above, 3 since the intercom automatically to the main unit 1 by the operation of the _second call button can be switched connection, the main without applying modifications of the main unit 1 The number of doorphones that can be connected to the device 1 can be increased. By the way, in the above-mentioned telephone system and home telephone, it is customary to set a hold, a door phone call, and the like by a dial pulse signal or a push button dial signal, but since various data services using the push button dial signal are increasing in recent years. Push button to telephone outlet 10 as shown in FIG. 10, so that the push button type telephone can be used to distinguish the push button dial signal for receiving this service and the setting signal of hold, door phone call etc. When a portable telephone is connected, a hold switch SW ₁ and a door phone call setting switch SW ₂ for performing a hold setting and a door phone call setting may be provided as operation switches. In this case, when these switches SW ₁ and SW ₂ are operated on the telephone outlet 10 side as shown in FIG. 11, a predetermined dial pulse signal is transmitted through the extension 5 to the main unit 1.
A dial pulse signal output unit 41 composed of a microcomputer for sending a signal to the dial pulse signal is provided. Here dial pulse signal output section 41 obtains power through voltage signal of the control line 6, the dial pulse upon detection switch operation by operating the relay RY ₀ drives the transistor Tr _4, which are predetermined relay contacts r ₀ The dial pulse signal is opened and closed by the number of signals, and a dial pulse signal similar to the dial pulse signal emitted from the dial pulse type telephone at the time of holding or intercom call setting is generated and superimposed on the extension line 5 by this opening and closing. When receiving the data service by the push button signal, it is assumed that the push button dial signal receiving unit 31 is cut off in advance, and the push button of the slave telephone set T is used when transmitting the data. [Effects of the Invention] The present invention connects an outside line from a central office or a private branch exchange, a call line from a door phone, and an extension line for connecting a slave phone, and connects an outside line with an extension line or between extensions, or between a call line and an extension line of a door phone. Means for controlling the connection, means for transmitting a communication status signal for an outside line via a control line corresponding to all extensions of the slave phone, and communication status signals between the doorphone and the slave phone or between slave phones for all extensions of the slave phone A main device having a means for transmitting through the control line, and a telephone connection unit connected to the extension, for connecting a slave telephone, and receiving a communication state signal from the main device connected to the control line and talking on the telephone; Since the telephone outlet is provided with display means for displaying a display state different from that during a call by distinguishing the display state during a call from that received according to the received communication status signal, The communication status can be displayed on the telephone outlet side using a bell or the like, and the display status is changed according to the communication status, so that the user can easily grasp the communication status, so that the child telephone Before going off-hook, it is possible to see at a glance whether another child telephone is currently talking or ringing, and it is not necessary for the child telephone to have its display function. It is possible to display a busy or ringing call without using a special telephone without using a special telephone. This has the effect.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall configuration diagram of an embodiment of a telephone system of the present invention, FIG. 2 is a circuit block diagram of a main unit of the above, and FIG. 3 is a telephone outlet I / F display drive unit of the same. 4, FIG. 4 is an explanatory diagram of the operation of the above, FIG. 5 is a circuit diagram of the telephone outlet of the above, FIG. 6, FIG. 7 is an explanatory diagram of the above operation, and FIG. Connection diagram when used,
FIG. 9 is a circuit diagram of the doorphone extension adapter of the above, FIG. 10 is a front view of an example of the telephone outlet used in the embodiment, and FIG. 11 is a circuit diagram of an example of the telephone outlet used in the embodiment. 1 ... main unit, 2 ... external line, 3 ₁ , 3 ₂ ... door phone, 4 ...
… Talk line, 5… extension, 6… control line, 10 ₁ to 10 _n … telephone outlet, 11… control circuit, 12 ₁ , 12 ₂ … connection terminal, 28… telephone outlet I / F display Drive section, 34 ...
Display circuit, 41… Dial pulse signal output section, SW ₁ ……
Hold switch, SW ₂ … Door phone talk switch, T ……
Sub-telephones, LEDa, LEDb ... Light-emitting diodes.

   ────────────────────────────────────────────────── ─── Continuation of front page    (72) Inventor Jin Fukagawa               1048 Kadoma Kadoma, Matsushita Electric Works               In company (72) Inventor Yoshinori Suzuki               1048 Kadoma Kadoma, Matsushita Electric Works               In company (72) Inventor Kiyotaka Takehara               1048 Kadoma Kadoma, Matsushita Electric Works               In company (72) Inventor Miyuki Oda               1048 Kadoma Kadoma, Matsushita Electric Works               In company (72) Inventor Isao Shimada               1048 Kadoma Kadoma, Matsushita Electric Works               In company                (56) References JP-A-56-28419 (JP, A)                 JP-A-57-212856 (JP, A)                 JP-A-61-67394 (JP, A)

Claims (1)

(57) [Claims] A means for connecting an outside line from a telephone office or a private branch exchange, a communication line from a door phone, and an extension connecting a slave phone, and controlling the connection between the outside line and the extension or between extensions, and a connection between the call line and the extension of the door phone, communication with the outside line. Means for sending a status signal via a control line corresponding to all extensions of the slave phone, and means for sending a communication status signal between the intercom and the slave phone or between slave phones via the control line corresponding to all extensions of the slave phone. Connected to the main unit and the extension,
The communication status signal from the main unit connected to the telephone connection unit and the control line for connecting the slave phone is received, and a call is being made. A telephone outlet provided with a display means for performing a different display during a call. 2. It has a connection terminal section for connecting to the terminal section of the main unit for connecting the doorphone, and a doorphone connection section for connecting a plurality of doorphones, and when the talk button of the connected doorphone is operated, the communication line of the doorphone is mainly operated. 2. The telephone system according to claim 1, further comprising a doorphone extension adapter connected to a terminal of the device. 3. A patent comprising a telephone outlet equipped with an operation switch for setting a hold, a door phone call, an extension call, etc., and a means for transmitting a predetermined constant dial pulse signal to the extension when the operation switch is operated. The telephone system according to claim 1.