KR940002936Y1 - Extension call system between portable devices of wireless telephone - Google Patents
Extension call system between portable devices of wireless telephone Download PDFInfo
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- KR940002936Y1 KR940002936Y1 KR2019900013917U KR900013917U KR940002936Y1 KR 940002936 Y1 KR940002936 Y1 KR 940002936Y1 KR 2019900013917 U KR2019900013917 U KR 2019900013917U KR 900013917 U KR900013917 U KR 900013917U KR 940002936 Y1 KR940002936 Y1 KR 940002936Y1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/725—Cordless telephones
- H04M1/72502—Cordless telephones with one base station connected to a single line
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2201/00—Electronic components, circuits, software, systems or apparatus used in telephone systems
- H04M2201/34—Microprocessors
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Abstract
내용 없음.No content.
Description
제1a 및 b도의 종래 무선전화기의 휴대장치 및 고정장치의 계통도.Schematic diagram of a portable device and a fixed device of a conventional radiotelephone of FIGS.
제2a 및 b도는 본 고안에 따른 무선전화기의 휴대 장치 및 고정장치의 계통도.2a and b is a schematic diagram of a portable device and a fixing device of a radiotelephone according to the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
100 : 휴대장치 100a : 휴대장치수신부100: portable device 100a: portable device receiver
100b : 휴대장치송신부 110,210 : 마이크로프로세서100b: portable device transmitter 110,210: microprocessor
111 : 모드선택부 200 : 고정장치111: mode selector 200: fixing device
200a : 고정장치수신부 200b : 고정장치수신부200a: fixed device receiver 200b: fixed device receiver
200c : 전화라인메칭부 211 : 잡음억압회로200c: telephone line matching unit 211: noise suppression circuit
ASW1 :아날로그스위치 PB1 : 송/수신제어푸쉬버튼ASW1: Analog Switch PB1: Transmit / Receive Control Push Button
본 고안은 휴대장치를 2개이상 사용하는 멀티-핸드세트(MULTI-HANDSET)무선전화시스템에 있어서, 휴대장치 상호간의 내선통화가 가능하도록 한 무선전화기의 휴대장치간 내선통화시스템에 관한 것이다.The present invention relates to an extension call system between portable devices of a radiotelephone in a multi-handset wireless telephone system using two or more portable devices.
종래 무선전화기 휴대장치와 고정장치간의 내선통화는 휴대장치의 송신주파수 46㎒대역주파수와 고정장치의 송신주파수 49㎒대역주파수를 이용하였는데, 첨부된 도면을 참조해 설명하면 다음과 같다.Conventionally, an internal call between a portable telephone and a fixed device uses a transmission frequency of 46 MHz and a transmission frequency of 49 MHz of a fixed device, which will be described below with reference to the accompanying drawings.
제1a 및 b도는 종래 무선전화기 휴대장치 및 고정장치의 계통도로서, 제1a도의 휴대장치에서 49㎒의 송신주파수대역으로 송신하면, 제1b도의 고정장치에서 49㎒주파수를 수신하여 전화라인에 전송하고, 전화라인을 통해 상대방으로부터 전송되어온 신호를 46㎒주파수대역으로 휴대장치에 송신하며, 휴대장치는 46㎒주파수를 수신하여 스피커로 출력한다.1a and b are schematic diagrams of a conventional wireless telephone portable device and a fixed device. When the portable device of FIG. 1a transmits in a transmission frequency band of 49 MHz, the fixed device of FIG. 1b receives and transmits the 49 MHz frequency to a telephone line. In addition, a signal transmitted from the other party through the telephone line is transmitted to the portable device in the 46 MHz frequency band, and the portable device receives the 46 MHz frequency and outputs it to the speaker.
먼저, 제1a도의 휴대장치에서 마이크(14)를 통해 입력되는 음성신호는 마이크앰프(13)를 통항 후 고주파 변조부(12)에서 위상동기루프(PLL)제어부(10)의 주파수에 동기하여 무선송신을 위한 고주파로 변조되며, 필터 및 앰프(11)를 통해 49㎒주파수대역으로 필터링됨과 아룰러 송신에 따른 증폭된 후 휴대장치의 안테나(1)를 통해 송신하게 되고, 고정장치[제1b도]에서 안테나(21)를 통해 수신되어 필터 및 앰프(22)를 통해 49㎒주파수대역으로 필터링됨과 아울러 수신에 따른 증폭된 후 위상동기루프(PLL)제어부(30)의 출력주파수와 믹서(23)를 통해 합성되어 위상동기시키고, 이는 중간주파(1F)필터1(24)에서 10.695㎒주파수로 필터링되며, 다시 믹서(25)를 통해 상기 위상동기루프제어부(30)의 주파수와 합성되어 중간주파(1F)필터2(26)에서 455㎑의 주파수로 필터링된 후 복조부(27)에서 복조된다. 복조된 음성신호는 스피커앰프(28)를 통해 스피커(29)에 출력됨과 아울러 내선통화가 아닌 전화통화시에는 라인앰프(31)를 통해 전송에 따른 증폭후 메칭트랜스(35)를 통해서 전화라인(T,R)에 전송하게 된다. 또한, 전화통화시 메칭트랜스(35)를 통해 전송받는 신호를 증폭하는 라인앰프(34)에서 내선통화시에는 고정장치의 마이크(37)를 통해 입력되는 음성신호가 마이크앰프(36)를 통해 증폭되어 상기 라인앰프(34)를 통한후, 고주파변조부(33)에서 상기 위상동기루프제어부(30)의 출력주파수에 동기되어 고주파로 변조되고, 변조된 신호는 필터 및 앰프(32)에서 46㎒주파수대역으로 필터링됨과 아룰러 송신에 따른 증폭이 되어 고정장치의 안테나(21)를 통해 휴대장치에 송신된다. 고정장치로부터 송신되어 오는 46㎒주파수대역의 신호는 휴대장치에서 안테나(1)를 통해 수신되어 필터 및 앰프(2)를 통해 46㎒주파수대역필터링 및 수신에 따른 증폭이 되며, 이는 위상동기루프제어부(10)의 주파수와 믹서(3)를 통해 합성된 후 중간주파(1F) 필터(4)에서 10.6795㎒주파수대약필터링되고, 다시 믹서(5)에서 상기 위상동기루프제어부(10)의 주파수와 합성후 중간 주파필처2(6)에서 455㎑주파수대역필터링되어 복조부(7)에서 음성신호로 복조되며, 복조된 음성신호는 스피커앰프(8)를 통해 휴대장치의 스피커(9)로 출력된다.First, the voice signal input through the microphone 14 in the portable device of FIG. 1a is wirelessly synchronized with the frequency of the phase locked loop (PLL) controller 10 by the high frequency modulator 12 after passing through the microphone amplifier 13. It is modulated to a high frequency for transmission, filtered through a filter and amplifier 11 into the 49 MHz frequency band, and amplified according to the Arlar transmission, and then transmitted through the antenna 1 of the portable device. ] And the output frequency of the phase synchronization loop (PLL) control unit 30 after being amplified according to the reception received through the antenna 21 and filtered through the filter and amplifier 22 to the 49 MHz frequency band. Synthesized through the phase synchronization, which is filtered at the frequency of 10.695 MHz in the intermediate frequency (1F) filter 1 (24), and then synthesized with the frequency of the phase synchronization loop control unit 30 through the mixer 25 to obtain the intermediate frequency ( 1F) Filter 2 (26) filters the frequency at 455 kHz and returns It is demodulated in the unit 27. The demodulated voice signal is output to the speaker 29 through the speaker amplifier 28, and when a telephone call is not an internal call, the amplified voice signal is amplified according to the transmission through the line amplifier 31. T, R). In addition, in an internal call, a voice signal input through the microphone 37 of the fixed device is amplified by the microphone amplifier 36 in the line amplifier 34 that amplifies the signal received through the matching transformer 35 during a telephone call. And then through the line amplifier 34, the high frequency modulator 33 is modulated at high frequency in synchronization with the output frequency of the phase locked loop control unit 30, and the modulated signal is 46 MHz in the filter and amplifier 32. The signal is filtered in the frequency band and amplified according to the Arler transmission and transmitted to the portable device through the antenna 21 of the fixed device. The 46MHz frequency band signal transmitted from the fixed device is received through the antenna 1 in the portable device and amplified according to the 46MHz frequency band filtering and reception through the filter and the amplifier 2, which is a phase locked loop control unit. 10.6795 MHz frequency-filtered by the intermediate frequency (1F) filter (4), and then synthesized through the mixer (3) and frequency (10), and then synthesized with the frequency of the phase-locked loop control unit (10) by the mixer (5). Thereafter, the 455 kHz frequency band is filtered at the intermediate frequency filter 2 (6), and the demodulator 7 is demodulated as a voice signal, and the demodulated voice signal is output to the speaker 9 of the portable device through the speaker amplifier 8. .
따라서, 무선전화기에 있어서 휴대장치와 고정장치간에 서로다른 주파수대역으로 송신하고, 이를 각기 수신하므로 송수신이 동시에 가능하게 되어 내선통화가 가능하게 된다.Therefore, in the radiotelephone, the portable device and the fixed device are transmitted in different frequency bands and received respectively, thereby enabling simultaneous transmission and reception, thereby enabling internal calls.
여기서, 일반전화통화모드와 휴대장치와 고정장치간의 내선통화모드절환은 도면에 표시되지 않은 모드선택부를 통해 절환하여 휴대장치의 마이크로프로세서가 고정장치의 마이크로프로세서에 제어신호를 보내 내선통화모드를 선택한다.Here, the general telephone call mode and the internal call mode switching between the portable device and the fixed device are switched through a mode selection unit not shown in the figure, and the microprocessor of the portable device sends a control signal to the microprocessor of the fixed device to select the internal call mode. do.
그러나, 송신주파수가 서로다른 고정장치와 휴대장치의 내선통화는 가능하나 하나의 고정장치에 2개이상의 휴대장치를 사용하는 경우에 휴대장치간에는 송신주파수가 동일하기 때문에 휴대장치간의 내선통화는 불가능하였다.However, internal calls between fixed devices and portable devices with different transmission frequencies are possible, but when two or more portable devices are used for a single fixed device, internal calls between mobile devices were not possible because the transmission frequencies were the same between mobile devices. .
본 고안은 이와같은 문제점을 감안하여 2개이상의 휴대장치를 사용하는 멀티핸드세트 무선전화기에 있어서, 마이크로프로세서를 이용하여 송/수신제어를 하므로 휴대장치 상호간에 고정장치를 통해 내선통화가 가능하도록 한 무선전화기의 휴대장치간 내선통화시크템을 안출한 것으로, 이를 첨부한 도면을 참조해 상세히 설명하면 다음과 같다.The present invention has been made in view of the above problems in a multi-handset wireless telephone using two or more portable devices. Since the transmission / reception control is performed using a microprocessor, it is possible to make an internal call through a fixed device. An extension call system between mobile devices of a wireless telephone is devised and described in detail with reference to the accompanying drawings.
제2a도는 본 고안에 따른 무선전화기의 휴대장치 계통도이고, (b)는 본 고안에 따른 무선전화기의 고정장치 계통도로서, 이에 도시한 바와같이 휴대장치 안테나(1)를 통해 수신하는 신호를 필터 및 앰프(2)를 통하고, 믹서(3)에서 제어부(10)의 주파수와 합성후 중간주파필터1(4)을 통해 다시 믹서(5)에서 상기 위상동기루프제어부(10)의 주파수와 합성하여 중간주파필터2(6)를 통하여 복조부(7)에서 복조하며, 복조한 음성신호를 스피커앰프(8)를 통해 스피커(9)에 출력하는 휴대장치수신부(100a)와, 휴대장치마아크(14)를 통해 입력되는 음성신호를 마이크앰프(13)를 통한 후 상기 위상 동기루프제어부(10)의 주파수에 동기하는 고주파변조부(12)를 통하고, 필터 및 앰프(11)를 통해 휴대장치안테나(1)에서 고정장치로 송신하는 휴대장치송신부(100b)로 구성된 휴대장치(100)와, 고정장치안테나(21)를 통해 수신하는 신호를 필터 및 앰프(22)를 통하고, 믹서(23)에서 위상동기루프제어부(30)의 주파수와 합성하여 중간주파필터1(24)에서 필터링하며, 이를 다시 믹서(25)에서 상기 위상동기루프제어부(30)의 주파수와 합성하여 중간주파필터2(26)에서 필터링 후 복조부(27)를 통해 복조한 음성신호를 스피커앰프(28)를 통해 스피커(29)에 출력하는 고정장치수신부(200a)와, 상기 복조부(27)의 음성신호를 라인앰프(31)를 통한 후 메칭트랜스(35)를 통해 전화라인(T,R)에 전송시키고, 그 전화라인(T,R)을 통해 전송되어 오는 신호를 메칭트랜스(35)를 통해 수신하도록 하는 전화라인메칭부(200c)와, 고정장치마이크(37)의 출력을 마이크앰프(36)를 통한 후 상기 전화라인메칭부(200c)를 통해 수신하는 전화라인수신신호를 인가받는 라인앰프(34)를 다시통해 상기 위상동기루프제어부(30)의 주파수에 동기하는 고주파변조부(33)를 통하고, 필터 및 앰프(32)를 통한 후 고정장치안테나(21)를 통해 휴대장치(100)에 송출하는 고정장치손신부(200b)로 구성된 고정장치(200)에 있어서, 상기 휴대장치(100)에 송/수신제어푸쉬버튼(RB1)을 마이크로프로세서(110)에서 감지하도록 하고 모드선택부(111)를 통한 휴대장치간 내선통화모드시 상기 푸쉬버튼(PB1)의 상태를 감지하여 그에 따라 휴대장치송신부(100b)의 마이크앰프(13) 및 필터 및 앰프(11)와 휴대장치수신부(100a)의 스피터앰프(8)를 마이크로프로세서(100)가 제어하도록 하고, 고정장치(200)에 상기 고정장치수신부(200a)의 복조부(27) 출력을 검색하는 스켈치(SQUELCH)회로인 잡음억압회로(211)와, 상기 복조부(27)의 출력을 상기 고정장치송신부(200b)의 라인앰프(34)에 인가시키기 위한 아날로그스위치(ASW1)를 구비하고, 휴대장치간 내선통화모드에서 미이크로프로세서(210)가 상기 아날로그스위치(ASW1)를 온시킨 후 상기 잡음억압회로(211)의 출력에 따라 그 아날로그스위치(ASW1)를 제어하도록 구성하였다.2a is a schematic diagram of a portable device of a radiotelephone according to the present invention, and (b) is a schematic diagram of a fixed device of the radiotelephone according to the present invention. As shown therein, a filter and a signal received through the portable device antenna 1 are shown. After combining with the amplifier 2, the frequency of the control unit 10 in the mixer (3) and the intermediate frequency filter 1 (4) and then again in the mixer (5) synthesized with the frequency of the phase synchronization loop control unit 10 The portable device receiver 100a demodulates the demodulator 7 through the intermediate frequency filter 2 6 and outputs the demodulated voice signal to the speaker 9 through the speaker amplifier 8, and the portable device mark 14 After the voice signal input through the microphone amplifier 13 through the high frequency modulator 12, which is synchronized to the frequency of the phase-locked loop control unit 10, through the filter and amplifier 11 portable device antenna A portable device (1) consisting of a portable device transmitter (100b) for transmitting to a fixed device in (1). 00) and the signal received through the fixed device antenna 21 through the filter and amplifier 22, and combined with the frequency of the phase-locked loop control unit 30 in the mixer 23 to the intermediate frequency filter 1 (24). The filter 25 combines the frequency with the frequency of the phase-locked loop control unit 30 in the mixer 25 and filters the voice signal demodulated through the demodulator 27 after filtering in the intermediate frequency filter 2 26. The fixed device receiver 200a outputting to the speaker 29 through the () and the voice signal of the demodulator 27 through the line amplifier 31 and then through the matching transformer 35 to the telephone line (T, R) And a telephone line matching unit 200c for receiving a signal transmitted through the telephone lines T and R through the matching transformer 35, and the output of the fixing device microphone 37 as a microphone amplifier ( Through the line line 34 receiving the telephone line reception signal received through the telephone line matching unit 200c. Through the high frequency modulator 33, which is synchronized with the frequency of the phase-locked loop control unit 30, through the filter and the amplifier 32, and fixed to the portable device 100 through the fixing device antenna 21 In the fixed device 200 composed of a device damage unit 200b, the portable device 100 detects the transmission / reception control push button RB1 in the microprocessor 110 and through the mode selection unit 111. In the extension call mode between portable devices, the state of the push button PB1 is sensed, and accordingly, the microphone amplifier 13 and the filter and amplifier 11 of the portable device transmitter 100b and the sputter amplifier of the portable device receiver 100a And a noise suppression circuit 211 which is a squelch circuit for controlling the microprocessor 100 to control the output of the demodulator 27 of the fixed device receiver 200a. To apply the output of the demodulator 27 to the line amplifier 34 of the fixing device transmitter 200b An analog switch (ASW1) is provided, and in an internal call mode between portable devices, the microprocessor 210 turns on the analog switch ASW1, and according to the output of the noise suppression circuit 211, the analog switch ASW1. It was configured to control.
이와같이 구성한 본 고안의 작용 및 효과를 설명하면 다음과 같다.Referring to the operation and effects of the present invention configured as described above are as follows.
일반적인 전화통화 및 휴대장치(100)와 고정장치(200)의 내선통화는 휴대장치(100)의 휴대장치송신부(100b)로부터 송출되는 49㎒주파수신호는 고정장치(200)의 고정장치수신부(200a)를 통해 수신되어 스피커앰프(28)를 통해 스피커(29)에 출력되고, 전화통화의 경우 복조부(27)의 출력이 전화라인메칭부(200c)를 통해 전화라인(T,R)에 전송되며, 전화통화의 경우에는 그 전송에칭부(200c)를 통해 전송받는 신호를, 휴대장치와 고정장치의 내선통화모드일 경우에는 고정장치마이크(37)를 통해 입력되는 신호를 고정장치송신부(200b)를 통해 46㎒주파수대역신호로 휴대장치(100)에 송출하게 되며, 휴대장치(100)는 휴대장치수신부(100a)를 통해 수신하여 스피커 앰프(8)를 통해 스피커(9)로 음성출력을 하게된다.The general telephone call and the internal call of the portable device 100 and the fixed device 200 are 49 MHz frequency signals transmitted from the portable device transmitter 100b of the mobile device 100 to receive the fixed device receiver 200a of the fixed device 200. Received through the speaker amplifier 28 and output to the speaker 29, and in the case of a telephone call, the output of the demodulator 27 is transmitted to the telephone line (T, R) through the telephone line matching unit (200c) In the case of a telephone call, the signal received through the transmission etching unit 200c is transmitted through the fixing device microphone 37 in the internal call mode of the portable device and the fixed device. ) Is transmitted to the portable device 100 as a 46 MHz frequency band signal, and the portable device 100 receives the audio output through the portable device receiver 100a to the speaker 9 through the speaker amplifier 8. Will be done.
만약, 제2b도에 도시한 바와같은 고정장치(200)에 제2a도에 도시한 바와같은 휴대장치(100)를 2개이상 사용하는 멀티핸드세트 무선전화기에 있어서, 휴대장치간의 내선통화를 위해서는 휴대장치간의 내통화모드를 선택하는데, 모드선택부(111)를 통해 휴대장치간 내선통화모드에서만 마이크로프로세서(110)가 푸쉬버튼(PB1)의 상태에 따라 송/수신제어를 하고, 고정장치(200)의 마이크로프로세서(210)가 아날로그스위치(ASW1)를 온시킨다. 이때 푸쉬버튼(PB1)을 눌르면 마이크로프로세서(110)가 휴대장치송신부(100b)의 필터 및 앰프(11)와 마이크앰프(13)를 온시키고, 휴대장치수신부(100a)의 스피커앰프(8)를 오프시켜 송신가능하도록 하고, 수신하는 휴대장치일때는 푸쉬버튼(PB1)을 오프시키면, 마이크로프로세서(110)가 상기 휴대장치송신부(100b)의 필터 및 앰프(11)와 마이크앰프(13)를 오프시켜 송신을 차단하고, 휴대장치수신부(100a)의 스피커앰프(8)를 온시켜 수신하도록 한다. 따라서 휴대장치 A와 휴대장치B가 내선통화일 경우, 휴대장치간 내선통화모드선택후 휴대장치A의 푸쉬버튼(PB1)을 누르고 휴대장치마이크(14)에 말을 하면, 마이크로프로세서(110)가 휴대장치수신부(100a)의 스피커앰프(8)를 오프시키고, 휴대장치송신부(100b)를 온시키므로 마이크(14)를 통해 입력되는 음성신호가 휴대장치송신부(100b)를 통해 고정장치수신부(200a)에 수신되고, 이 고정장치수신부(200a)의 복조부(27)의 출력이 아날로그스위치(ASW1)를 통해 고정장치송신부(200b)에 피드백되어 그 고정장치송신부(200b)에서 다른 휴대장치 B에 송신된다. 여기서 휴대장치 B는 푸쉬버튼(PB1)을 오프시켜 마이크로프로세서(110)가 휴대장치송신부(100b)를 오프제어하고, 휴대장치수신부(100a)의 스피커앰프(8)를 온시키므로 휴대장치 A에서 송신되는 음성신호가 고정장치(200)를 통해 휴대장치B에서 수신되어 음성을 들을 수 있다.In a multi-handset wireless telephone using two or more portable devices 100 as shown in FIG. 2A and a fixed device 200 as shown in FIG. 2B, for an internal call between portable devices, The internal call mode is selected between the portable devices, and the microprocessor 110 performs transmission / reception control according to the state of the push button PB1 only in the internal call mode between the portable devices through the mode selection unit 111. The microprocessor 210 of the 200 turns on the analog switch ASW1. At this time, when the push button PB1 is pressed, the microprocessor 110 turns on the filter of the portable device transmitter 100b, the amplifier 11 and the microphone amplifier 13, and turns on the speaker amplifier 8 of the portable device receiver 100a. In the case of a portable device receiving the portable device, the push button PB1 is turned off, and the microprocessor 110 turns off the filter, the amplifier 11, and the microphone amplifier 13 of the portable device transmitter 100b. Transmission is interrupted, and the speaker amplifier 8 of the portable device receiver 100a is turned on for reception. Therefore, when the portable device A and the portable device B are internal calls, the microprocessor 110 may press the push button PB1 of the portable device A and talk to the portable device microphone 14 after selecting the internal call mode between the portable devices. Since the speaker amplifier 8 of the portable device receiver 100a is turned off and the portable device transmitter 100b is turned on, the voice signal input through the microphone 14 is fixed to the fixed device receiver 200a through the portable device transmitter 100b. Is received, and the output of the demodulator 27 of the fixed device receiver 200a is fed back to the fixed device transmitter 200b via the analog switch ASW1 and transmitted from the fixed device transmitter 200b to the other portable device B. do. In this case, the portable device B turns off the push button PB1 so that the microprocessor 110 controls the portable device transmitter 100b to off, and turns on the speaker amplifier 8 of the portable device receiver 100a. The voice signal is received from the portable device B through the fixing device 200 to hear the voice.
이와반대로 휴대장치B에서 말을 하고 휴대장치 A에서 들을 경우에는 휴대장치B는 푸쉬버튼(PB1)을 누르고, 휴대장치 A는 푸쉬버튼을 오프시킨다.On the contrary, when talking on the portable device B and listening on the portable device A, the portable device B presses the push button PB1, and the portable device A turns off the push button.
만약, 휴대장치간의 내선통화모드시 휴대장치 A 및 휴대장치 B 모두 푸쉬버튼이 오프상태이면, 두 휴대장치의 송신부가 오프상태이므로 고정장치(200)의 수신부(200a)에 잡음이 발생하고, 즉 임의의 신호레벨 미만의 잡음만 발생되므로 잡음억압회로(211)에서 이를 검출하여 마이크로프로세서(210)에 인가하게 되고, 이에따라 마이크로프로세서(210)는 아날로그스위치(ASW1)를 오프시켜 잡음이 휴대장치에 출력되는 것을 방지한다.If the push button is turned off in both the mobile device A and the mobile device B in the extension call mode between the mobile devices, noise is generated in the receiver 200a of the fixed device 200 because the transmitters of the two mobile devices are off. Since only a noise below a certain signal level is generated, the noise suppression circuit 211 detects it and applies it to the microprocessor 210. Accordingly, the microprocessor 210 turns off the analog switch ASW1 so that the noise is transmitted to the portable device. Prevent output.
따라서, 본 고안에 따르면, 모드선택부(111)를 통한 모드선택에 의해 일반전화통화와, 휴대장치와 고정장치의 내선통화 및 휴대장치간의 내선통화가 가능하게 된다.Therefore, according to the present invention, the mode selection through the mode selection unit 111 enables a general telephone call, an extension call between the portable device and the fixed device, and an extension call between the portable device.
휴대장치간의 내선통화모드에서만 마이크로프로세서가 휴대장치에서는 푸쉬버튼에 따른 송/수신제어 및 고정장치에서는 아날로그스위치제어를 하여 휴대장치간의 통화가 가능해진다.Only in the internal call mode between the portable devices, the microprocessor can perform the call / receive control according to the push button on the portable device and the analog switch control on the fixed device, thereby enabling the call between the portable devices.
이상에서 설명한 바와같이 본 고안은 휴대장치를 2개이상 사용하는 멀티핸드세트 무선전화시스템에서 일반 전화통화 및 휴대장치와 고정장치의 내선통화기능 외에 휴대장치간의 내선통화기능을 가능하게 하므로 사용자에게 편리함을 제공하는 효과가 있다.As described above, the present invention is convenient for the user because the multi-handset wireless telephone system using two or more portable devices enables the internal telephone call between the portable devices as well as the internal call function of the portable device and the fixed device. Has the effect of providing.
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| KR2019900013917U KR940002936Y1 (en) | 1990-09-07 | 1990-09-07 | Extension call system between portable devices of wireless telephone |
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| KR2019900013917U KR940002936Y1 (en) | 1990-09-07 | 1990-09-07 | Extension call system between portable devices of wireless telephone |
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