KR100491749B1 - IP phone combined PSTN phone - Google Patents

Abstract

The present invention is intended to accommodate both a PSTN telephone or an Internet telephone, and to selectively use a regular telephone or an Internet telephone in a PSTN telephone combined Internet telephone.

PSTN telephone combined Internet phone according to the present invention includes a PSTN connector connected to the switch, hook detection and loop forming unit for hook state detection and loop formation of the phone, handset for a call, the first control unit for controlling each unit A PSTN junction having a PSTN telephone function; A keypad and an LCD unit comprising a keypad for selecting various keys and a telephone mode, and an LCD for displaying key selection and mode status; And an IP telephone board having an IP telephone function and including a second controller for controlling whether a PSTN junction loop is formed and a call path according to the PSTN mode or the IP mode.

Description

IP phone combined PSTN phone

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a PSTN telephone combined Internet telephone, which is capable of sharing a keypad and a handset (handset) together with transmission and reception path control according to the PSTN mode and IP mode.

1 is a block diagram of an analog telephone generally used in a PSTN.

Referring to FIG. 1, a PSTN connector 111 connected to an exchanger, a bridge circuit 112 for switching polarity of a ring and a tip, and a hook detection and loop for detecting hook on / off and forming a loop upon hook off A forming unit 113, a handset unit 114 for a call, a buzzer 115 for generating a buzzer sound, a controller 116 for setting a transmission / reception path and a ring according to the hook on / off state; The key pad 117 inputs a desired number directly by the user, and the clock generator 118 generates a clock.

The conventional PSTN analog phone as described above will be described with reference to FIG. 1.

First, when a signal is generated from the exchange, it is received by the PSTN connector 111, and the received signal is transmitted to the hook detection and loop forming unit 113 through the bridge circuit 112. The hook detection and loop forming unit 113 detects the received signal and transmits the received signal to the control unit 116.

Then, the controller 116 generates a ring through the buzzer 115 and outputs it to the outside, and the user hears the ring sound and off-hooks the handset of the handset 114.

At this time, the hook detection and loop forming unit 113 detects the off-hook and forms a loop, and can make a voice call with the calling party through the control unit 116.

On the contrary, when the user off-hooks the handset of the handset 114, the hook detection and loop forming unit 113 detects the off hook and forms a loop. At this time, the control unit 116 detects a loop, transmits a dial tone to the user, and waits for input of the keypad 117.

When the user inputs a desired telephone number from the keypad 117, the keypad 117 scans the corresponding key and transmits the number to the controller 116. The controller 116 detects a DTMF tone and detects a hook. The loop forming unit 113, the bridge circuit 112, and the PSTN connector 111 may be transferred to the exchanger.

At this time, the exchange generates a ring back tone while detecting the corresponding telephone number and transmitting it to the called party, and the ring back tone is transmitted to the handset 114 through the control unit 116. When off-hook is made at the called party, the voice call is connected to allow the caller to talk to the called party.

However, conventionally, the PSTN telephone does not have an Internet telephone function and thus cannot make an Internet telephone call. The Internet telephone also does not have a PSTN telephone function, and thus, each individual terminal uses a PSTN or IP telephone service.

The present invention has been made to solve the above problems, and an object thereof is to provide a PSTN telephone combined Internet telephone that can accommodate both PSTN telephone and Internet telephone.

Another feature is to provide a PSTN telephony Internet phone that can share the handset, keypad, LCD unit.

It is another object of the present invention to provide a PSTN telephony Internet telephone capable of controlling handset paths and loops according to PSTN mode or IP mode.

Another feature is to provide a PSTN telephony Internet telephone that enables PSTN telephony upon power down.

PSTN telephone combined Internet phone according to the present invention for achieving the above object,

A PSTN connector having a PSTN telephone function, comprising a PSTN connector connected to an exchanger, a hook detection and loop forming unit for hook state detection and loop formation of a telephone, a handset for a call, and a first control unit for controlling each unit;

A keypad and an LCD unit comprising a keypad for selecting various keys and a telephone mode, and an LCD for displaying key selection and mode status;

And an IP telephone board having an IP telephone function and including a second controller for controlling whether a PSTN junction loop is formed and a call path according to the PSTN mode or the IP mode.

Preferably, the keypad unit further comprises a mode switch button to be toggled for operation selection in the PSTN telephone mode or the IP telephone mode.

Preferably, the PSTN junction part has a voice for converting a call path of an on-hook relay unit and a handset unit into a PSTN junction part or an IP telephone board to form and block a loop of the hook detection and loop forming part by a second controller. It characterized in that it comprises a path relay unit.

Preferably, the PSTN junction unit and the IP telephone board each include first and second keypad interface units activated or deactivated according to a PSTN mode or an IP mode so as to share the keypad unit.

Hereinafter, with reference to the accompanying drawings as follows.

2 is a block diagram of a PSTN telephone combined Internet phone according to an embodiment of the present invention.

2, a keypad and LCD unit 230 having a PSTN junction 210 for enabling a PSTN call, a keypad 231 and an LCD 232; The configuration includes an IP telephone board 250 that enables internet telephony.

Here, the PSTN junction 210 includes a PSTN connector 211, a bridge circuit 212, a hook detection and loop forming unit 213 for forming a hook state detection and a loop, and an on hook relay unit for controlling loop formation. 214, the voice path relay unit 216 for switching the voice path of the handset 215, loop control by the hook detection and loop forming unit 213, on / off hook detection, and ring It includes a first control unit 217 for sensing, a first keypad interface unit 218 activated and deactivated according to the phone mode, a buzzer 219 and an oscillator 220.

The IP telephone board 250 includes a codec 251 for coding and decoding voice transmission and reception according to the switching of the voice path relay unit 216, and the on-hook relay unit 214 and voice according to the PSTN mode or the IP mode. A second control unit 252 for controlling the route relay unit 216 and the keypad interface units 218 and 253; a second keypad interface unit 253 that is activated and deactivated according to a telephone mode; and a LAN connector connected to a LAN. 254 and the Ethernet physical layer 255, the memory unit 256, the microphone and speaker (257, 258), and the power supply unit 259.

Referring to the accompanying drawings, the PSTN telephone combined Internet telephone according to the embodiment of the present invention as described above is as follows.

PSTN junction 210 is a board that enables a normal PSTN phone, keypad and LCD unit 230 is composed of a keypad 231 and the LCD unit 232 therein, the user's key selection and the current mode on the screen Displays the status, key press status and operating status.

In addition, the IP phone board 250 detects the PSTN mode or the IP mode selection by the user to control the loop formation control and the handset path to control the call path.

Here, for the loop formation control and the handset path control, the PSTN junction 213 is provided with an on hook relay section 214 for forming and blocking the loop of the hook detection and loop formation section 214, and the handset section And a voice path relay unit 216 for switching the path of step 215.

Such a PSTN dual-purpose telephone is capable of making calls according to the PSTN mode or the IP mode using one handset unit (handset) 215, and sharing the keypad unit 231 and the LCD unit 232 in the PSTN or IP telephone mode. Will be used.

To this end, the PSTN junction 210 is provided with a first keypad interface 218 so that the key input of the keypad 231 can be input from the PSTN junction 210 and the IP phone board 250, respectively. The telephone board 250 is provided with a second keypad interface unit 253, respectively.

On the other hand, when the user selects a mode switch button (not shown) provided in the keypad 213, the user operates in the PSTN mode or the IP mode. At this time, press the mode switch button once to enter PSTN mode and press it again to toggle to IP mode.

At this time, the second control unit 252 of the IP phone board 250 detects the selection of the mode switch button, and recognizes whether the PSTN mode or the IP mode.

When the user off-hooks, the hook detection and loop forming unit 213 transfers the hook detection signal to the first control unit 217 and the second control unit 252, respectively.

At this time, the second controller 252 recognizes the current telephone mode and controls the on-hook relay unit 214. In the PSTN mode, the second controller 252 connects a relay of the on-hook relay unit 214 to detect hooks and form a loop. The loop by the unit 213 is formed, and in the IP mode, the relay of the on-hook relay unit 214 is disconnected to interrupt the loop.

In addition, the second controller 252 controls the voice path relay unit 216 to be connected to the corresponding call path according to the current phone mode. That is, in the PSTN mode, the voice path relay unit 216 is controlled to connect the handset 215 with the first controller 215. In the IP mode, the voice path relay unit 216 is controlled to send the transmitter 215. And the codec 251 are connected.

 The second control unit 252 activates the first keypad interface unit 218 in the PSTN mode and deactivates the second keypad interface unit 253. The second controller 252 activates the second keypad interface unit 253 in the IP mode. The first keypad interface unit 218 is deactivated.

On the other hand, a brief description of the operation during the call as follows.

In the PSTN mode, the on-hook relay unit 214 connects a relay to form a loop of the hook detection and loop forming unit 213 according to the control signal of the second controller 252, and the voice path relay unit 216. ) Connects the handset 215 and the first controller 217, and the first keypad interface 218 is activated.

If the user according to the off hook of the handset 215, the hook detection and loop forming unit 213 detects the off hook and forms a loop, so that the user can make a voice call with the calling party. At this time, the first controller 217 detects a loop, transmits a dial tone to the user, and waits for a key input through the keypad interface 218.

And, in the IP mode, according to the control signal of the second control unit 252, the on-hook relay unit 214 blocks the relay, so that the loop is not formed by the hook detection and loop forming unit 213, voice The path relay unit 216 switches the path of the handset 215 to connect with the codec 251, and the second keypad interface unit 218 is activated.

If the user hooks off the handset 215, the hook detection and loop forming unit 213 does not operate. The key signal of the keypad unit 231 is input through the second keypad interface unit 253 and connected to the Internet. The voice signal of the handset 215 is compressed by the codec 251 and transmitted to the Internet through the physical layer unit 255 and the LAN connector 254 through the control unit 252.

On the other hand, when receiving a call from the PSTN combined Internet phone, the LCD unit 232 displays the reception state of the current phone mode, so that the user can select a mode switch button and answer the call in the corresponding mode.

On the other hand, when the power supplied to the power supply unit 258 is cut off, the on-hook relay unit 214, the voice path relay unit 216, and the first keypad interface unit 218 of the PSTN junction unit 210 have a default value of PSTN. It can be set as a mode, and it is basically connected, so that a PSTN call can be made even during a power failure.

As described above, the present invention has an effect that a user can selectively use a PSTN phone and an Internet phone by accommodating a PSTN combined Internet phone.

In addition, while allowing a user to make a voice call at low cost through the Internet, there is an effect that can be used PSTN phone even when the power off.

In addition, since the keypad and the handset constituting the Internet phone can be used in common, there is an effect that the user can always talk easily.

1 is a block diagram showing a conventional PSTN telephone.

2 is a block diagram of a PSTN telephone combined Internet phone according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

210 ... PSTN junction 213 ... hook detection and loop forming

214 ... on-hook relay 215 ... handset

216 ... Voice path relay section 217,252 ... control section

Keypad Interface 230 ... Keypad and LCD Unit

Keypad section 232 LCD section

250 IP Phone Board 251 Codec

LAN connector 255 Ethernet physical layer

Claims (4)

A PSTN connector having a PSTN telephone function, comprising a PSTN connector connected to an exchanger, a hook detection and loop forming unit for hook state detection and loop formation of a telephone, a handset for a call, and a first control unit for controlling each unit; A keypad and LCD unit comprising a keypad section for selecting various keys and telephone modes, an LCD section for displaying key selection and mode status, so as to be commonly used for the PSTN telephone function or the IP telephone function ; An IP telephone board having an IP telephone function and including a second controller for controlling whether or not a loop is formed in the PSTN junction according to the PSTN mode or IP mode, and a call path, And each of the PSTN junction and the IP telephone board includes first and second keypad interfaces activated or deactivated according to a PSTN mode or an IP mode so that the keypad unit can be shared . The method of claim 1, The keypad unit further comprises a mode switch button toggled for operation in a PSTN telephone mode or an IP telephone mode. The method of claim 1, The PSTN junction includes an on hook relay unit for forming and blocking a loop of the hook detection and loop forming unit by a second controller, and a voice path relay unit for converting a call path of a handset into a PSTN junction or an IP telephone board. PSTN telephone and internet telephone, characterized in that it comprises. delete