KR200292434Y1 - Private branch exchange system using wireless technic - Google Patents

Abstract

The present invention relates to a wireless local telephone system, and in particular, the purpose of the call and response between the terminals within a certain area, and also to make a telephone call to the outside. The present invention for this purpose is connected to the incoming terminal and the terminal device of the telephone line to provide an external call service, and the wireless fixed device 110 and wireless for the internal or external call within a certain area And a charging device 130 for charging a battery built in the portable device 120.

Description

Wireless extension telephone system {PRIVATE BRANCH EXCHANGE SYSTEM USING WIRELESS TECHNIC}

The present invention relates to an internal telephone network, and more particularly, to a wireless telephone system.

Currently, radios are used in leisure, general business, hobby and construction sites.

This is because the radio can talk in a wider area than a home wireless phone.

However, the conventional radio is inconvenient to use a general telephone or a mobile phone for a telephone call because the radio cannot make a call.

In order to improve the inconvenience, a frequency common communication wireless telephone has been developed, which enables not only telephone calls but also calls between terminals, but in this case, there is a disadvantage in that a separate fee must be paid.

In other words, unlike a radio, a conventional wireless telephone cannot communicate with a plurality of terminals and must pay a separate usage fee for a short-distance call as well as a separate private switchboard to use a local telephone. As a result, the expense of spending increases.

Accordingly, an object of the present invention is to provide a wireless local telephone system which allows a call and response between terminals in a predetermined area and also enables a telephone call to the outside in order to improve the disadvantages of the related art.

That is, the present invention aims to enable a telephone call with the outside as well as a local call in a certain area.

In addition, the present invention has another object to enable a group call within a certain region without additional equipment.

The present invention for this purpose does not require installation of equipment such as a private switchboard and payment of usage fees for calls within a certain area, thereby providing convenience for the user and relieving the economic cost of the user. .

1 is a block diagram of an extension telephone system presented in an embodiment of the present invention.

FIG. 2 is a detailed block diagram of the wireless fixation device of FIG.

3 is a detailed block diagram of the portable device of FIG.

Figure 4 is a block diagram showing a connection state with the extension telephone system proposed in the present invention.

5 is an exemplary view of the wireless fastener in FIG.

Explanation of symbols on the main parts of the drawings

110: wireless fixing device 120: portable device

130: charging device

The present invention is a wireless fixed device for providing an external call service by connecting the incoming terminal of the telephone line and the terminal device to achieve the above object, and the wireless fixed device and the wireless communication method for the internal or external call within a certain area It is characterized by comprising a portable device connected to.

The wireless fixing device is connected to a telephone line and detects a call signal input from the other party and generates a call signal to be transmitted to the other party, and the trunk line connection circuit is connected to the trunk line connection circuit and is connected to a portable device, a call signal and a call signal. It characterized by comprising a wireless circuit unit for transmitting and receiving in a wireless manner.

The portable device detects a call signal from a wireless fixed device, generates a ring signal, transmits a call signal corresponding to the subscriber's subscriber number input by the user to the wireless fixed device, and transmits and receives a call signal with the wireless fixed device. It is characterized by comprising a circuit portion.

The portable device is configured to receive operating power from a separate charging device by embedding a battery.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In the embodiments of the present invention will be omitted a detailed description of known functions and configurations that may unnecessarily obscure the subject matter of the present invention.

FIG. 1 is a block diagram of a wireless branch line telephone system according to an embodiment of the present invention. As shown in FIG. 1, a wireless fixed device 110 is connected to an incoming terminal of a telephone line and a terminal device to provide an external call service. And a portable device 120 connected to the wireless fixing device 110 in a wireless communication manner for a local call or an external call within a predetermined region, and a charging device for charging a battery built in the portable device 120 ( 130).

The wireless fixing device 110 is connected to a telephone line and detects a call signal input from the opposite party and generates a call signal transmitted to the other party, and is connected to the trunk line connecting circuit 111. And the wireless circuit unit 112 for transmitting and receiving a call signal and a call signal to and from the portable device 120 in a wireless manner, and the trunk line connecting circuit unit 111 and the wireless circuit unit to enable communication between the subscriber and the terminal device connected to the telephone line. The control circuit part 113 which controls the operation | movement of 112, and the power supply part 114 which supplies operation power are comprised.

The portable device 120 detects a call signal from the wireless fixation device 110 to generate a ring signal, and transmits a call signal corresponding to the subscriber's subscriber number input by the user to the wireless fixation device 110. A wireless circuit unit 121 for transmitting and receiving a call signal with the fixing device 110, a dial input unit 122 for off-hook / on-hook switching and input of a subscriber's subscriber number, and an off-hook telephone set by the dial input unit 122 The control circuit unit 124 for controlling the operation of the wireless circuit unit 140 and the rechargeable battery 123 for supplying the operation power for the call with the other party subscriber connected by the trunk line is configured.

The charging device 130 may be configured in addition to the wireless fixing device 110 or may be configured as a separate device.

The charging device 130 includes a DC adapter 131 for converting AC power into DC power, a charging circuit 132 for supplying the DC power to the operating power of the portable device 120, and a charge for displaying a charging state. The display unit 133 is configured.

Briefly describing the operation of the embodiment of the present invention configured as described above are as follows.

The wireless fixing device 110 transmits a ringing tone to a mobile device 120 when a call is received and connects the mobile device 120 to a telephone line when the mobile device 120 is in an off-hook state. And transmits a DTMF signal corresponding to the other party's subscriber number transmitted from the portable device 120.

The wireless fixing device 110 may be configured as a box type, an AC plug type, and a modular jack type, as shown in FIG. 5.

The portable device 120 includes a group call function and a general phone call function.

First, in case of an individual group call, when the user presses the call number of the terminal to be called and presses the send button, the call signal is sent and the answer button is pressed on the called terminal.

In addition, if you want to make a group call, press the group call button to send the call signal to all terminals of the group, and press the answer button on the called terminal to make a call between the groups.

When the user wants to make a phone call, pressing the call button sends out the call data to the wireless fixing device 110 so that the wireless fixing device 110 connects the telephone line and switches to a call state (OFF-HOOK). After the other party's subscriber number is inputted, it is transmitted to the wireless stationary device 110, and when connected with the other party's subscriber, the voice signal is transmitted and received with the wireless stationary device 110 for the call with the other party and the call button is terminated. When pressed, the connection with the wireless fixing device 110 is terminated.

The telephone network for the telephone call is configured as shown in FIG.

In addition, when the portable device 120 is mounted, the charging device 130 converts AC power into DC power in the DC adapter 131, and the charging circuit 132 converts the charging current into the battery 123 of the portable device 120. It is supplied to the to charge the battery 123 and to indicate that the charge indicator 133 is in a charged state.

Meanwhile, detailed configurations of the wireless fixing device 110 and the portable device 120 are the same as those of FIGS. 2 and 3.

In general, radio communication channels are composed of 25 channels, and one frequency is shared for transmission and reception. To transmit a voice signal, press and hold the send button. Receive without pressing the button.

In the embodiment of the present invention, the internal telephone system uses the same frequency and transmission output as the radio system, but since the communication channel is divided into a transmission channel and a reception channel, it is actually composed of 12 communication channels. Instead, it adopts MCA (Multi-Channel Access) method, so that users can freely transmit and receive without pressing the transmit button.

The reason for adopting the MCA method is to scan the entire channel periodically and use the empty channel when trying to find an empty channel that is not in use, thereby preventing crosstalk between terminals.

The wireless fixing device 110 is a ring detection function for transmitting a ring signal to the portable device 120 by recognizing a call from the other subscriber, and off-hook / on-hook of the portable device 120 And a DTMF transmission function for transmitting the other party's subscriber number to the telephone line after recognizing the change.

That is, the wireless fixing device 110, as shown in the block diagram of Figure 2, the line interface unit for the DTMF transmission for impedance matching with the telephone line, the detection of the call signal from the other party and the call of the upstream subscriber ( 210, a transmission signal processor 220 for voice / data signal processing from the telephone line, a reception signal processor 230 for voice / data signal processing from the portable apparatus 120, and a telephone line with the telephone line. Formatting of the data from the relay control unit 240 for connection, the phase control circuit 253 for controlling the oscillation operation in the transmission signal processing unit 220 and the reception signal processing unit 230, and the portable device 120 And a data processing unit 252 for transmitting data, a data sending unit 251 for transmitting data to the portable device 120, and a central processing unit (CPU) 254 for controlling the operation of each unit. do.

The portable device 120 is capable of simultaneous calls up to a maximum of 12, and by specifying a unique number (2 to 4 digits) is configured to enable mutual calls between the portable devices.

When the mobile device 120 makes a group call, when the group call key of the mobile device is pressed at the side of the group call, all the mobile devices that are not in the current call state are called. It is configured to enable simultaneous calls between all mobile devices that are connected through the call channel of the device.

The portable device 120 has a separate telephone call key for communication with the wireless fixed device 110 to distinguish it from the communication between the portable devices and to make a call to another mobile device when calling from the wireless fixed device 110. In order to prevent the response, the data code (DATA CODE) is embedded as well as configured to store a separate ring tone.

The portable device 120 has a function of fixing a call channel to one channel when using only a radio function for outdoor leisure and the like and is configured to enable simultaneous calls between multiple portable devices.

That is, the portable device 120 has a function of generating a ringing sound by recognizing a RING signal transmitted from the wireless fixed device 110 or another portable device, and has a function for extension calls, group calls, and telephone calls. To configure.

As shown in the block diagram of FIG. 3, the portable device 120 having this function includes a keypad 311 for setting up an internal call, a group call or a telephone call, and voice / data to be transmitted to the wireless fixed device 110. In the transmission signal processor 320 for signal processing, the reception signal processor 330 for the voice / data signal processing from the wireless fixing device 110, the transmission signal processor 320 and the received signal processor 330 A phase control circuit 353 for controlling the oscillation operation of the oscillator, a data shaping unit 352 for shaping data from the wireless fixing device 110, and data for transmitting data to the wireless fixing device 110. And a sending unit 351 and a central processing unit (CPU) 354 for controlling the operation of each unit and driving the buzzer 312 by recognizing a call from the opposite subscriber.

Referring to the wireless fixing device 110 and the portable device 120 configured as described above in detail the operation and effect of the embodiment of the present invention as follows.

1. The individual call process between mobile devices will be described.

When the calling mobile device enters a unique number of the corresponding mobile device to be called on the keypad 311 and the internal call key is pressed, the central processing unit 354 transmits the call data of the corresponding mobile device. And the call data are mixed with the high frequency signal generated by the oscillator 322 by the phase control circuit 353 and amplified by the transmitting RF amplifier 323 to the air through the transmission filter 324 and the antenna. It is spread.

At this time, when the call data is received through the antenna of the called portable device, the call data is a high frequency amplified by the receiving RF amplifier 332 and the high frequency signal is separated while passing through the mixer (MIXER) 323 and the demodulator 335. The original call data is restored and the restored call data is formatted by the data shaping unit 352 and transmitted to the central processing unit 354.

Accordingly, the called portable apparatus compares the call data with its own call data in the central processing unit 354, and if the call data matches, sends an extension call signal to the buzzer 312 to generate an internal call sound. do.

Then, the called portable device controls the data sending unit 351 so that the central processing unit 354 sends the confirmation data when the extension call key is pressed, and the confirmation data is transmitted to the calling portable device through the transmission signal processing unit 320. A call is made between the calling portable device and the called portable device.

Thereafter, when the extension call key is pressed again in the extension call state, the extension call is stopped and the state is switched to the standby state.

2. The group call process between mobile devices will be described.

The group call process is also the same as the individual call process, except that the group call data stored in all mobile devices are transmitted and the group call data received in all the called mobile devices are compared with the group call data stored in advance. Only the process is different.

Therefore, detailed description will be omitted.

3. When a call is received from the other subscriber, the call connection process will be described.

When a call is received from the subscriber in the standby state, the wireless fixing device 110 detects a ring signal input through the telephone line and informs the central processing unit 254 of the ring signal.

At this time, the central processing unit 254 that recognizes the input of the ring signal controls the data sending unit 251 to send the ring data RING DATA.

Accordingly, the ring data is mixed with the high frequency signal generated by the oscillator 222 by the phase control circuit 253, amplified by the transmit RF amplifier 223, and then propagated to the air through the transmit filter 224 and the antenna.

In this case, when the ring data transmitted from the wireless fixing device 110 is input to the reception RF amplifier 332 through the reception filter 331, the portable device 120 amplifies the high frequency in the reception RF amplifier 332 and the mixer 333. ) Mixes the high frequency signal generated by the oscillator 334 by the phase control circuit 353 and the received RF signal amplified above, and the demodulator 335 separates the high frequency signal from the original ring data. Restore to (RING DATA).

Accordingly, when the data shaping unit 352 formats the ring data and delivers the ring data to the central processing unit 354, the central processing unit 354 transmits a telephone call signal to the buzzer 312 to generate a telephone call sound.

After that, when the telephone call key is generated, the portable apparatus 120 transmits the call data through the data transmitter 351 when the telephone call key is pressed on the keypad 311 and the call data is a phase control circuit. 353 is mixed with the high frequency signal generated by the oscillator 322 and amplified by the transmit RF amplifier 323, and then the call data propagates to the air through the transmit filter 324 and the antenna.

Accordingly, the wireless fixing device 110 receives the call data transmitted from the portable device 120 by the reception RF amplifier 232 when the call data transmitted from the portable device 120 is received by the reception RF amplifier 232 through the reception filter 231. Amplifying the RF signal, the mixer 233 mixes the high frequency signal generated by the oscillator 234 by the phase control circuit 253 and the received RF signal amplified above, and demodulates the mixed signal. The high frequency signal is separated and restored to the original call data.

At this time, when the data shaping unit 252 formalizes the call data and delivers the call data to the central processing unit 254, the central processing unit 254 transmits the confirmation data regarding the call data to the portable device 120. To control the relay control unit 240 at the same time to operate the relay 242.

Therefore, the call path between the wireless fixing device 110 and the portable device 120 is connected to the call state (Off-Hook).

4. When the call path is connected to the wireless mobile device 110 or another mobile device in a wireless manner, the process of transmitting the voice signal to the other party will be described.

When the portable device 120 is in a call state and the voice signal is converted into an electrical signal by the microphone, the electrical signal is controlled by the voice signal amplifier 321 and the high frequency signal generated by the oscillator 322. And then amplified by the transmit RF amplifier 323 and propagated to the air through the transmit filter 324 and the antenna.

At this time, when the signal transmitted from the portable device 120 is received from the antenna of the wireless fixed device 110 or another portable device, the reception filter 231/331 passes only the frequency band to receive and receives the received RF amplifier 232/332 After the high frequency amplification in the) through the mixer 233/333 and the demodulator 235/335 is restored to the original audio signal.

Therefore, when the LPF circuit (low filtration circuit) 236/336 filters the high frequency component mixed with the restored speech signal, the speech signal amplifier 237/337 amplifies the speech / data signal.

Accordingly, in the case of the wireless fixing device 110, the voice signal is transmitted through the TEL-LINE circuit 211 to the telephone line, and the voice signal is transmitted to the other subscriber. In the case of other portable devices, the speaker 338 or It is sent to the earphone connected to the earphone jack (339) and delivers a voice signal to the other subscriber.

5. When the call path is connected to the wireless mobile device 110 or another portable device in a wireless manner, a process of receiving a voice signal from the other party in the portable device 120 will be described.

First, when the voice signal of the other party subscriber transmitted to the telephone line is input to the TEL-LINE circuit 211, the wireless mobile device 110 amplifies the voice / data signal in the voice signal amplifier 221 and then oscillator 222. The high frequency signal is generated and mixed with the transmit RF amplifier 223, and the transmit RF amplifier 223 amplifies the high frequency signal and propagates to the air through the transmit filter 224 and the antenna.

At this time, when the audio signal transmitted from the wireless fixing device 110 or another portable device is received by the antenna, the portable device 120 passes only the frequency band that the reception filter 331 intends to receive and the high frequency is received by the receiving RF amplifier 332. After amplification, the high frequency signal is separated through the mixer 333 and the demodulator 335 to restore the original audio signal.

Accordingly, the restored voice signal is removed from the LPF circuit 336, the residual high frequency component is amplified by the voice signal amplifier 337, and then delivered to the subscriber through the earphone connected to the speaker 338 or the earphone jack 339. .

6. The operation in the standby state will be described.

In the standby state, the wireless fixing device 110 and the portable device 120 have the central processing unit 254 and 354 transmitting the oscillator 222/322 and the receiving oscillator 234 through the phase control circuit 253/353. While controlling the oscillation frequency, the SCAN periodically scans all channels to find a noisy empty channel and checks whether call data or ring data is input.

In addition, the communication method for the communication path between the wireless fixing means 110 and the portable device 120 is a communication method using FM modulation, a communication method using Bluetooth (BLUETOOTH) or DSS (Digital Spread Spectrum) for wireless LAN It can be implemented by the communication method used.

As described in detail above, the present invention can be used as a telephone network within a certain area, such as a multi-family house, a general house, or a single building, thereby enabling a local call without installing additional equipment, thereby reducing the cost for equipment installation and wiring work. Not only that, but it also has the effect of saving the call charge in a certain area.

In addition, the present invention has the effect of providing convenience to the user can freely make calls between groups and telephone calls even in the near-field movement.

Claims (7)

A wireless fixed device connected to an incoming terminal of a telephone line for detecting ring signals from the other subscriber or transmitting DTMF to the other subscriber and transmitting and receiving voice signals with the other subscriber; Individual call or group call by connecting the wireless fixed device with the call path and connecting the call path with other mobile devices in a certain area for ring signal input from the other subscriber or DTMF transmission to the other subscriber and call with the other subscriber. Wireless telephone system comprising the at least one portable device for performing the configuration. The device of claim 1, wherein the wireless anchor is A trunk line connection circuit unit connected to a telephone line to detect a call signal input from the opposite subscriber and generate a call signal transmitted to the opposite subscriber; And a wireless circuit unit for transmitting and receiving a call signal and a call signal between the trunk line connection circuit unit and the portable device by connecting a call path in a wireless manner to the portable device. The portable device of claim 1, wherein the portable device is Detect call signal from wireless fixed device or other portable device to generate ring signal, and transmit call signal corresponding to other party's subscriber number input by user to wireless fixed device or other portable device A wireless circuit unit for transmitting and receiving a call signal by connecting a call path to the communication unit; Dial input unit for off-hook / on-hook switching and input of the other party's subscriber number, Wireless off-premises telephone system characterized in that it comprises a control circuit unit for controlling the operation of the wireless circuit unit for the call with the other party connected by the telephone line when the off-hook setting. The control circuit of claim 3, wherein the control circuit unit Wireless telephone system, characterized in that to control the wireless circuit to send a call signal corresponding to the unique number of the mobile device when the individual call is set, and to send a call signal common to all mobile devices when setting the group call . The method of claim 1, wherein the call route is Wireless telephone system, characterized in that using a communication method using the FM modulation. The method of claim 1, wherein the call route is Wireless extension telephone system, characterized in that using the communication method using DSS (Digital Spread Spectrum). The method of claim 1, wherein Wireless telephone system, characterized in that using the Bluetooth (BLUETOOTH) communication method.