KR19980042955A - Channel matching device of integrated information communication network - Google Patents

Abstract

The present invention relates to a channel matching device of a general information communication network, and comprises a first channel matching device and a second channel matching device by filtering and impedance matching means, encoding and decoding means, control means, first-in first-out means, and phase locked loops. And exchange the ISDN for the integrated telecommunication network by connecting the first channel matching device and the second channel matching device to the ISDN channel matching unit of the mother station and the home PCM station of the home country and the spare channels of the ISDN channel matching unit of the local PCM station. There is a very good effect that the communication service of the comprehensive information communication network can be provided in the area where the facility is not installed.

Description

Channel matching device of integrated information network

The present invention relates to a channel matching device of a general information communication network, and a channel matching device of a general information communication network capable of providing a communication service of a general information communication network in an area where an ISDN switching facility is not installed for an integrated information communication network (ISDN). It is about.

In order for a subscriber to receive a communication service of an integrated services digital network, an ISDN exchange facility for communication of the integrated information network must be installed in the area where the subscriber resides.

Therefore, a subscriber who resides in a small administrative unit of Eupyeong-dong, which is not equipped with an ISDN exchange facility for communication of an integrated telecommunication network, has not been provided with communication service of an integrated telecommunication network.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a channel matching device for a comprehensive telecommunication network that can provide a telecommunication service for an integrated telecommunication network in an area where an ISDN switching facility is not installed for the telecommunication network. To provide.

In order to achieve the above object, a channel matching device of an integrated information communication network according to the present invention provides filtering and impedance matching means for removing ambient interference and matching channel impedance when transmitting and receiving an echo sound communication signal to an exchange of an integrated information communication network. Encoding and decoding means for receiving the 2B1Q communication signal output from the filtering and impedance matching means, encoding the TB communication signal, and decoding the TTL communication signal transmitted from the terminal side of the integrated information communication network into the 2B1Q communication signal; Control means for receiving a communication signal output from the encoding and decoding means, controlling a transmission rate of a frame of the communication signal, and controlling operations of the encoding and decoding means and the filtering and impedance matching means, and outputted from the control means. Communication signal First-in first-out means for allocating a communication signal to a pulse code modulation panel to first output the communication signal when outputting to a transmission / reception unit on the terminal side of the terminal, and the control means and the encoding and decoding means And a phase locked loop for supplying a corrected oscillation pulse to the control means and the encoding and decoding means by comparing a main clock and a reception clock to operate.

1 is a block diagram of a general information communication network showing the installation position of the channel matching device according to an embodiment of the present invention in a general information communication network;

2 is a control circuit block diagram of a channel matching device of a comprehensive information communication network according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

2: integrated network switch

4: ISDN channel matching unit of PCM station

6: ISDN channel matching unit of local PCM station

16: first channel matching device 20: second channel matching device

24: filtering and impedance matching means 28: encoding and decoding means

30: control means 32: first-in first-out means

34: phase locked loop 36: display means

38: key input means

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

As shown in Fig. 1, a communication output from the integrated information network switch 2 is connected to the integrated information network switch 2 of the mother station which connects the communication signal from the subscriber to the called party called by the subscriber. The ISDN channel matching unit 4 of the PCM station apparatus of the home station is connected to compensate for the attenuation of the signal. In the ISDN channel matching unit 4 of the PCM station apparatus of the mother station, the PCM station apparatus means a European pulse code modulation station apparatus, and the PCM station apparatus is also called a PCM station apparatus E ₁ or P32 station apparatus. Lose.

The ISDN channel matching unit 4 of the PCM station apparatus of the mother station includes the ISDN of the PCM station apparatus of the own station to compensate for the attenuation of the communication signal output from the ISDN channel matching unit 4 of the PCM station apparatus of the mother station. The channel matching unit 6 is connected.

The ISDN channel matching unit 6 of the PCM station apparatus of the own station transmits the communication signals transmitted from the ISDN channel matching unit 6 of the PCM station apparatus of the own station to the subscriber's telephone 8, fax 10, and computer ( 12) A network termination equipment (14) is connected to distribute to the back.

The ISDN channel matching unit 4 of the PCM station device of the mother station includes a first channel matching device 16 for matching the impedance of the channel of the integrated information communication network, the first channel matching device 16 and the PCM station of the local station. And a first transmitting and receiving unit (18) for transmitting and receiving communication signals between the ISDN channel matching units (6) of the device.

The ISDN channel matching unit 6 of the PCM station apparatus of the own station includes a second channel matching device 20 for matching impedance of a channel of a general information communication network, the second channel matching device 20 and the first transmission / reception unit. And a second transmitting / receiving unit 22 for transmitting and receiving communication signals therebetween.

The first channel matching device 16 uses two B channels and one D channel to transmit and receive communication signals between the integrated information network switch 2 and the ISDN channel matching unit 16 of the mother PCM station. Consists of.

Referring to Fig. 2, the configuration of the ISDN channel matching unit 16 of the mother station PCM station apparatus according to an embodiment of the present invention will be described.

The filtering and impedance matching means 24 is connected to the second signal transmission circuit 26 to remove the surrounding interference and match the impedance of the channel when transmitting and receiving an echo sound communication signal to the integrated information network switch 2. .

The second signal transmission circuit 26 transmits the communication signal output from the filtering and impedance matching means 24 to the integrated information network switch 2 and at the same time outputs from the integrated information network switch 2. It is connected to the filtering and impedance matching means 24 to transmit a signal to the filtering and impedance matching means 24.

Encoding and decoding means 28 receives a 2B1Q (2 Binary To Quaternary) communication signal output from the filtering and impedance matching means 24, codes it into a communication signal of TTL (transistor-transistor logic), and terminates network 14 Is connected to the filtering and impedance matching means 24 so as to decode the TTL communication signal transmitted from the TTL) into a 2B1Q communication signal.

The control means 30 receives the communication signal output from the encoding and decoding means 28 and controls the transmission rate of the frame of the communication signal and controls the encoding and decoding means 28 and the filtering and impedance matching means 24. It is connected to said encoding and decoding means 28 to control the operation.

First-in-first-out means (FIFO) 32, when outputting the communication signal output from the control means 30 to the first transceiving unit 18 allocates the communication signal to the pulse code modulation panel to first input the first communication signal It is connected to the said control means 30 so that it may be sent out.

PHASE LOCKD LOOP 34 compares the main clock and the received clock so that the control means 30 and the encoding and decoding means 28 are operated by pulses of the same period. It is connected between the control means 30 and the encoding and decoding means 28 to supply a corrected oscillation pulse to the encoding and decoding means 28.

The display means 36 receives the display signal from the control means 30 so as to display the power supply state, the connection state of the subscriber terminal, the display during operation, the initialization display, the alarm display, and the closed circuit. 30).

The key input means 38 is a test instruction for testing whether the filtering and impedance matching means 24, the encoding and decoding means 28, the control means 30 and the first-in, first-out means 32 operate normally, on the subscriber side. Subscriber side line test command for testing whether the circuit is steady state, ramp test command for testing whether each lamp of the display means is steady state, the filtering and impedance matching means 24, encoding and decoding means 28, control means The control means for inputting to the control means an initialization command for initializing the 30 and first-in first-out means 32 and an address setting command for setting an address of the exchanger 2 and the network terminator 14 of the home station and the local station. 30).

The timer 40 is connected to the control means 30 to output a signal having a time and a period to the control means 30.

The memory 42 stores the operation program necessary for the operation of the control means 30 and the communication protocol between the comprehensive information communication network switch 2 of the home country and the network termination device 14 of the home country. Is connected to.

The first transmit / receive unit 18 amplifies the communication signal output from the first transmit / receive unit 18 and outputs the second transmit / receive unit 22 to the second transmit / receive unit 22. A first signal transmission circuit 44 is connected to amplify the signal and transmit the signal to the first transmission / reception unit 18.

The configuration of the second channel matching device 20 is the same as the configuration 16 of the first matching device.

However, in the second channel matching device 20, the second signal transmission circuit 26 transmits the communication signal output from the filtering and impedance matching means 24 to the network termination device 14, It is connected to the filtering and impedance matching means 24 to transmit the communication signal output from the network termination device 14 to the filtering and impedance matching means 24.

When the first-in first-out means 32 outputs the communication signal output from the control means 30 to the second transmission / reception unit 22, the communication signal is allocated to the pulse code modulation panel so that the first communication signal is first sent out. It is connected to the said control means 30.

The third signal transmitting circuit 48 is connected to the second transmitting and receiving unit 22 to transmit a communication signal between the second transmitting and receiving unit 22 and the first transmitting and receiving unit 18.

The first channel matching device 16 and the second channel matching device 20 match ISDN of the PCM terminal device of the home country to perform a comprehensive information communication by matching a channel of an area where there is no ISDN exchange facility of a comprehensive information communication network. The channel matching unit 4 is connected to the spare channel of the ISDN channel matching unit 6 of the PCM station apparatus of the local station.

Hereinafter, the operation and effect of the channel matching device of the integrated information communication network according to an embodiment of the present invention.

The first channel matching device 16 and the second channel matching are respectively applied to the ISDN channel matching unit 4 of the PCM station apparatus of the mother station and the ISDN channel matching unit 6 of the PCM station apparatus of the own station as initial conditions for operation description. Assume that device 20 is installed.

First, a subscriber in an area where an ISDN switching facility of an integrated telecommunication network is not installed calls a subscriber in another area through the telephone 8.

The call signal is then transmitted from the telephone 8 to the network terminator 14.

The call signal is then transmitted from the network termination device 14 to the second signal transmission circuit 26 of the second channel matching device 20 of the local PCM end station. A call signal is then transferred from the second signal transfer circuit 26 to the filtering and impedance matching means 24. The noise incorporated in the call signal is removed by the filtering and impedance matching means 24. At the same time, the impedance of the channel over which the call signal is transmitted is matched.

A call signal is then transmitted from the filtering and impedance matching means 24 to the encoding and decoding means 28. The encoding and decoding means 28 then converts the call signal of 2B1Q output from the filtering and impedance matching means 24 into a call signal of TTL.

The call signal of TTL is then transmitted from the encoding and decoding means 28 to the control means 30.

Subsequently, a call signal is transmitted from the control means 30 to the first-in first-out means. Next, a call signal is transmitted from the first-in first-out means 32 to the second transmission / reception unit 22.

Subsequently, a call signal is transmitted from the second transmit / receive unit 22 to the third signal transfer circuit 48. Subsequently, a call signal is transmitted from the third signal transfer circuit 48 to the first signal transfer circuit 44. Next, a call signal is transmitted from the first signal transmission circuit 44 to the first transmission / reception unit 18.

Subsequently, a call signal is transmitted from the first transmission / reception unit 18 to the first-in, first-out means 32.

Next, the call signal is transmitted from the first-in first-out means 32 to the second signal transmission circuit 26 in the reverse order of the above-described process.

The call signal is then transmitted from the second signal transfer circuit 26 to the integrated information network switch 2.

Then, the first channel matching device 16, the first transmission / reception unit 18, the first signal transmission circuit 44, and the third signal transmission circuit 48 are reversed from the integrated information network switch 2 in the reverse order of the above-described process. ), The second transmitting / receiving unit 22, the second channel matching device 20, and the network termination device 14 supplies the call signal to the called person's telephone.

Then, communication between the subscriber and the called person is made through the channel of the integrated information communication network.

As described above, according to the channel matching device of the integrated information communication network according to the present invention, the first channel matching device and the second channel by filtering and impedance matching means, encoding and decoding means, control means, first-in, first-out means, and phase locked loops. Configuring a matching device and connecting the first channel matching device and the second channel matching device to the ISDN channel matching unit of the mother station and the PCM station of the home country and the spare channels of the ISDN channel matching unit of the For this reason, it is very effective to provide telecommunication service of comprehensive information network in the area where ISDN exchange facility is not installed.

Claims (3)

Filtering and impedance matching means for eliminating surrounding interference and matching channel impedance when transmitting and receiving an echo sound communication signal to an integrated information communication network switch; Encoding and decoding means for receiving a communication signal of 2B1Q output from the filtering and impedance matching means, encoding the communication signal of TTL, and decoding the communication signal of TTL transmitted from a terminal side of a general information communication network into a communication signal of 2B1Q; Control means for receiving a communication signal outputted from the encoding and decoding means, controlling a transmission rate of a frame of the communication signal, and controlling operations of the encoding and decoding means and the filtering and impedance matching means; First-in first-out means for allocating the communication signal to the pulse code modulation panel and outputting the first communication signal when the communication signal outputted from the control means is outputted to the transmitting / receiving unit of the terminal side of the integrated information communication network; PHASE LOCKD, which compares the main clock and the received clock so that the control means and the encoding and decoding means operate by pulses of the same period, and supplies a corrected oscillation pulse to the control means and the encoding and decoding means. LOOP), the channel matching device of a general information network. The display apparatus according to claim 1, further comprising display means for receiving a display signal from the control means and displaying a power supply state, a connection state of a subscriber terminal, a display during operation, initialization, and a closed circuit. Channel matching device of the integrated information network. 2. The subscriber line circuit test instruction according to claim 1, wherein the test instruction for testing whether the filtering and impedance matching means, the encoding and decoding means, the control means, and the first-in, first-out means operate normally, and the subscriber side circuit test instruction for testing whether the subscriber line is in a normal state. A lamp test command for testing whether each lamp of the display means is in a normal state, an initialization command for initializing the filtering and impedance matching means, an encoding and decoding means, a control means and a first-in-first-out means, and an address of an exchange and a terminal of a mother station and its own station. And a key input means for inputting an address setting command for setting the address into the control means.