KR920004615Y1 - Multifunction interphone - Google Patents

Abstract

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Description

Multifunction intercom

1 is a circuit diagram of a multifunction interphone according to the present invention.

* Explanation of symbols for main parts of the drawings

10: call data input unit 20: self number setting unit

30: display unit 40: system controller

50: call path switching unit 60: side noise prevention unit

The present invention relates to an interphone having various call functions in a communication device, and more particularly, to an interphone capable of preventing switching of a call route and self-measuring so as to automatically connect a desired call path to perform a selected call function. .

In general, a large number of people gather to work in one place, such as offices, hotels, apartments, etc. installed in the intercom or visitor, such as when you are in contact with the guard room, but for example, each generation of apartments, hotels or offices There is a problem that the call volume of the trunk line is increased because there is no function that can directly talk between the room through the interphone installed in the other room (ROOM).

Therefore, an object of the present invention is to provide a multi-function interphone that can automatically connect to the desired call path according to the call data and at the same time can have a variety of call functions, to prevent magnetic sidetones.

In order to achieve the above object, the multi-function interphone according to the present invention is a call data input unit for inputting data corresponding to the desired intercom on the other side of the intercom and the multi-function (all broadcast, individual broadcast, etc.) According to the data input from the call data input unit, the call number switching unit for switching the opening and closing of the call path, that is, the intercom of the other side desired from the intercom A system controller for automatically switching the opening and closing of the call path in accordance with the data for calling and the data corresponding to the multifunction, and when the call path is connected by the call path switching unit, Sidetone prevention to prevent audio signal input to microphone from being output from interphone speaker of own side It is characterized by including wealth.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the multi-function interphone according to the present invention.

The present invention is a multifunctional interphone which performs various functions and prevents magnetic side note, the circuit of which is shown in FIG.

Referring to FIG. 1, the call data input unit 10 is formed of a key matrix having a keyboard for inputting data for calling a desired intercom on the other side and data corresponding to multifunction from the intercom on the side of the keyboard. The rows and columns are connected to the scanfil input / output terminal PO of the system controller 40.

Magnetic number setting unit 20 is composed of a plurality of tip switch, the data in accordance with the switch is built into the system controller 40 through the input port (P6) of the system controller 40 (not shown) Is stored in the display unit 30, and the magnetic number is displayed on the display unit 30.

The system controller 40 controls the self number setting unit 20, the display unit 30, and the call path switching unit 50 to perform various call functions of the interphone according to all data input to the call data input unit 10. When the communication path is connected and transmits and receives a voice signal, the side-tone prevention unit 60 does not output the voice signal input to the microphone (MIC) of the interphone of one's own side (also called a called party) from the interphone speaker SP of his side. ) Is being controlled.

The call path switching unit 50 receives the call data output from the output ports P2 and P3 of the system controller 40 so as to function corresponding thereto according to the call data input from the call data input unit 10. Open collector type inverters I1 to I4 for controlling the call path to be transmitted to the call paths (Pa, Pb) of the other side (also called a receiving side) and the response signal to the call data transmitted from the other intercom. And an operational amplifier OP4 inputted to the input port P4 of the system controller 40 and the response signal, so that the response signal is transmitted from the output port P1 to the speaker SP on its own side. The transistors include transistors Q1 and Q2 for switching communication paths according to the output signal, inverters I5 to I7, resistors R4 to R6, diodes D4 to D6, and the like.

Here, a plurality of communication path switching unit 50 is installed in the interphone, which can reduce the increase in the trunk line.

The side noise prevention unit 60 amplifies the voice signal transmitted from the other interphone through the communication paths Pa and Pb according to the operation of the communication channel switching unit 50 and the operational amplifier OP3 applied to the speaker SP. The operational amplifier OP1 for amplifying the voice signal input to the microphone MIC and the voice signal amplified by the operational amplifier OP1 are applied to the non-terminal terminal of the operational amplifier OP3 for transmission to the other intercom communication path. An inverted amplification operational amplifier connected between an output terminal of the operational amplifier OP1 and an inverting terminal of the operational amplifier OP3 so that the amplified speech signal is not output to the speaker SP after being output. OP2) and resistors R13 to R20.

The multifunction interphone of this embodiment operates as follows under the above-described configuration. First, the functions embedded in the interphone according to the present invention include an individual call function, a function of calling three or four characters during an individual call, a switching function of returning a call to a third party during an individual call, and an individual call. However, the scheduled call function to make a scheduled call when the called party is busy, the redial function to redial again when the other party called but the other party is busy, the individual call without the handset (aka handset) After sending and receiving data with the other party, the other party uses the speaker phone call function, the speaker phone call function to make the speaker phone call and the data is transmitted and received when the call is heard, the speaker phone call function during the call by the other party. Privacy function to make calls without picking up the handset Collecting button function to generate chimes, ringing sound for the ringing time when you press the bell button, ringer limit function, door button limit function, unique number input function, dial to remember when it is troublesome to press various numbers There is a memory function.

In the present invention, an individual call function will be described as an example.

According to FIG. 1, the handset is interrupted via the power supply terminal Vcc of the system controller 40 by the hook switch H2. When predetermined data is input through the keyboard in the call data input unit 10 of the own intercom, the system controller 40 applies a scan pulse to the call data input unit 10 to detect the input data.

For example, if the data input to the call data input unit 10 is the call data of the other side (called the receiver side) interphone, the system controller 40 recognizes this and the data that can be recognized by the other interphone is output ports (P2, P3). ) The data output from the output ports P2 and P3 of the system controller 40 pass through the open collector inverters I1 to I4 in the communication path switching unit 50 through a plurality of communication paths Pa and Pb. Sent to the other intercom. The call data transmitted along the call path (Pa, Pb) line is composed of start bits, counterpart call data, and self-number transmission data in the case of individual calls, and the call controller switches the system controller 40 of the other interphone to recognize the call data. Waveform shaping and amplification into a square wave signal through the operational amplifier OP4 in 50 is input to the input port P4 of the system controller 40.

Here, for convenience, the configuration of the other intercom, which is not shown in the drawing, is the same as that shown in FIG.

In this way, a specific interphone of any one of a plurality of other intercoms receiving the call data called by the call data 10 is set by the magnetic number setting unit 20 that is input from the input port P6 in the system controller 40. If the intercom number on the side and the call data applied to the input port P4 are the same, and if the intercom number on the side and the call data are the same, the call signal corresponding to the telephone ring is output from the output port P5 of the system controller 40. The non-inverting terminal (+) of the operational amplifier OP3 is supplied through the capacitor C1, the variable resistor VR, the capacitor C2, the hook switch H1, and the resistor R7. The call signal supplied to the operational amplifier OP3 is amplified to a predetermined level and then output to the speaker SP to call the selected interphone.

When the interphone receives the call signal and makes a response by picking up the handset (also called a handset), and the response sound is input to the microphone MIC, it is amplified by the operational amplifier OP1 and then condenser. Through C5, resistor R13, diode D4, and transistor Q2, it is applied to the magnetic side interphone which outputs the call data to the communication paths Pa and Pb lines.

In case of an individual call transmitted through the call paths (Pa, Pb), the response data consisting of response data and stop bits is amplified to a waveform and a constant level in the associative amplifier (OP4) in the call path switching unit 50, and then the system controller. It is applied to the input port P4 of 40.

When a response signal is applied to the input port P4 of the system controller 40, a "high" signal is output from the output port P1 and supplied to the inverter 16 in the switching unit 50 via a call and the transistor Q1. And the transistor Q2 conducting the switching operation are conducted by the output signal of the inverter 15, respectively. Then, the response sound transmitted to the communication paths Pa and Pb is transmitted through the diodes D4 and D5 and the resistors R15, R16, R19, and R20 in the transistors Q1 and Q2 and the side noise prevention part 60. The non-inverting input terminal (+) and the inverting input terminal (-) of the operational amplifier OP3 are supplied.

Therefore, the response signal of the other intercom can be output from the speaker SP of the interphone to which call data is input and can talk upward.

On the other hand, if the voice signal is input to the microphone (MIC) to talk between the up, non-inverted and amplified by the operational amplifier (OP1) in the side noise prevention unit 60 is transmitted through the communication path (Pa, Pb) and at the same time the operational amplifier (OP3) Since it is supplied to the non-inverting terminal (+) of), and the inverting terminal (-) of the operational amplifier OP3 is inverted and amplified by the audio signal output from the operational amplifier OP1, the output signal of the operational amplifier speaker SP In the output of the operational amplifier OP3, the voice signals supplied to both terminals cancel each other, so that the side sound is not output from the speaker SP.

In summary, the data corresponding to the call number of the other interphone is transmitted with a confirmation tone to the interphone of the other interphone, and then the output port P2 of the system controller 40 is "high". After a while, a call sound, such as a telephone ringing sound, is heard through the input port P5 of the other system controller 40. At this time, the output port P2 of the system controller 40 on the magnetic side and the other side is in a "high" state at the same time. If you pick up the handset from the other side while answering the call, the call stops and the output port (P2) remains at "high". When the call is over, the handset returns to "low" at the output port (P2). ", And a pulse of" high "status is output from the output port P3.

In addition, the call paths P11 and P12 shown in FIG. 1 are door phone lines embedded in the multifunction intercom, switches S1 and S2 are switches that operate when used as door phones, and the switch PS is a push button. As the present invention is not related to the configuration for achieving the object to be pursued, the overall operation description is omitted.

The multifunction intercom according to the present invention, which operates as described above, can automatically open and close a call path to perform a function desired by a user. In particular, a voice signal input to a microphone of a mobile interphone is output from a speaker of the mobile phone. It is effective to prevent side noise.

Claims (3)

The call data input unit 10 for inputting data for calling the intercom of the receiver desired on the called party's intercom and data corresponding to multi-function (all broadcasts, individual broadcasts, etc.), and determining a line through a call of the intercom on the called party's intercom According to the data input to the magnetic number setting unit 20, the communication channel switching unit 50 for switching the opening and closing of the communication channel, the call data input unit 10, i. Call by the system controller 40, the call path switching unit 50 for controlling the call path switching unit 50 so that the opening and closing of the call is automatically switched in accordance with data for calling or data corresponding to the multi-function When the road is connected, the voice signal input to the microphone of the intercom side of the receiver side is characterized in that it comprises a side sound prevention unit 60 to prevent the output from the intercom speaker of the receiver side. Function interphone. The operational amplifier of claim 1, wherein the side noise prevention unit 60 amplifies a voice signal transmitted from a receiving interphone when the communication path is connected by the communication path switching unit 50 and applies it to the speaker SP. OP3), an operational amplifier (OP1) for amplifying the voice signal input to the microphone (MIC) to the receiving intercom through a connected communication path, the speech signal amplified by the operational amplifier (OP1) is an associative amplifier (OP3) And an inverted operational amplifier (OP2) connected to an output terminal of the associative amplifier (OP1), an output terminal of the operational amplifier (OP1), and an input terminal of the operational amplifier (OP3), so as to be canceled from the multifunction interphone. The open-collector inverter of claim 1, wherein the call path switching unit 50 controls the call path so that the call data output from the system controller 40 is transmitted to the call paths Pa and Pb of the receiving intercom. Waveform shaping and amplifying means comprising current biasing means (I1 to I4), an operational amplifier (OP4) for waveform shaping and amplifying a response signal to the call data from a receiving intercom, and outputting the resultant signal to the system controller 40; Transistors Q1 and Q2, inverters I5 to I7, resistors R4 to R6, and diodes for switching the communication paths so as to transmit and receive voice signals when the response signal is input to the waveform shaping and amplifying means. A multifunctional interphone comprising switching means consisting of D4 to D6).