KR0164107B1 - Transmission line processing apparatus for voice communication - Google Patents

Abstract

The present invention relates to a haptic line processing device that implements voice and data communication functions provided as an overhead byte of a synchronous transport module for maintenance and management of an ATM relay line. In order to provide a short circuit processing apparatus that accepts voice and data channels and performs voice and data communication regardless of the system state of the ATM layer of the ATM exchanger, an overhead frame is transmitted in a time slot and a digital signal is received to Frame conversion means (21) for carrying in a head frame, for selecting and transmitting an in-overhead data channel and for inserting HDLC data into the data channel; HDLC control means 28 for receiving the data channel, performing the HDLC protocol and transmitting the received data, and transmitting the received data by performing the HDLC protocol; Processor matching means 25 for matching with an external processor 4; Subscriber line matching means for matching with the processor 4 through the processor matching means 25, converting and transmitting voice information, which is a digital signal, into an analog signal, and receiving and converting the analog signal into a digital signal. (22); Complex frequency code (DTMP) receiving means 26 for decoding and transmitting the called number; Ring signal generating means 27 for generating a ring signal; A ring relay 23 for receiving and operating a ring signal under the control of the processor 4; And protection means 24 for blocking the overvoltage / current to increase the reliability of the ATM relay line and to increase the efficiency of maintenance and management during initial installation.

Description

Tarpaulin processing device for voice communication

1 is a block diagram of an interface to which the present invention is applied.

2 is a block diagram of a chipping line processing apparatus according to the present invention.

3 is a frame structure and timing diagram according to the present invention.

* Explanation of symbols for the main parts of the drawings

1: rudder wire processing unit 2: physical layer processing unit

3: phone 4: processor

21: frame conversion unit 22: subscriber line interface module (SLIM)

23: ring relay 24: overvoltage protection circuit

25 processor interface 26 complex frequency code (DTMF) receiver

27: ring signal generator

The present invention relates to a plywood processing apparatus that implements voice and data communication functions provided as overhead bytes of a synchronous passive module (STM) for maintenance and management of an Asynchronous Transfer Mode (ATM) relay line.

The synchronous transport module (STM) of the synchronous transmission hierarchy used in the ATM network is based on 155.020 Mbits / s, and one frame includes payload and overhead for transmitting ATM cells, and overhead payload. It provides the function to reliably transmit the data, the other line function for voice communication and the data channel for data transmission, which are necessary for maintenance and operator.

That is, overhead includes E1 byte for relaying voice communication and E2 byte for multiplexing interval, and to implement this function, interface with an overhead processor of a physical layer circuit for STM frame processing, convert a voice signal into a digital signal, and The function of converting a digital signal into a voice signal, interpreting a called number, providing a call signal, lighting a corresponding LED, and supplying a call current to a telephone are required.

This function is to provide basic communication for the maintenance and management of the high speed relay and relay line matching device of 155Mb / s or more, and should be able to operate independently of the state of the ATM switch. It should be mounted in the device board so that it can be easily connected and operated with a general telephone.

The present invention devised to solve the above problem is a general-purpose STM physical layer processing unit for generating and terminating an STM frame to accommodate voice and data channels to perform voice and data communication regardless of the system state of the ATM layer of the ATM switch. Its purpose is to provide a processing device.

In order to achieve the above object, the present invention receives an overhead frame from an external physical layer processing unit, selects and transmits the voice communication information in a time slot, receives a digital signal and transmits the digital signal to the physical layer processing unit, Frame conversion means for selecting and transmitting an in-overhead data channel and inserting Higher Data Link Control (HDLC) data into the data channel; HDLC control means for receiving a data channel from the frame converting means, performing an HDLC protocol, and then transmitting received data to an external processor, and transmitting data received from the processor to the frame converting means by performing an HDLC protocol; Processor matching means for matching with the processor; Matching with the processor through the processor matching means, and converts the voice information, which is a digital signal, from the frame matching means into an analog signal, and transmits the analog signal to a digital signal to be transmitted to the frame converting means. Subscriber line matching means; Complex frequency code (DTMP) receiving means for decoding a called number input from said subscriber line matching means and transmitting it to said processor matching means; Ring signal generating means for generating a ring signal; A ring relay connected to the subscriber line matching means, the ring relay being operated by receiving a ring signal from the ring signal generating means under control of the processor; And protection means connected between the ring relay and an external telephone to block overvoltage / current.

Hereinafter, with reference to the accompanying drawings will be described an embodiment according to the present invention;

FIG. 1 is a block diagram of an external interface to which the present invention is applied, where 1 is a pruning line processing unit, 2 is an STM physical layer processing unit, 3 is a telephone, and 4 is a processor.

The batting line processing unit 1 according to the present invention receives the overhead information from the overhead interface of the STM physical layer processing unit 2. From the received overhead frame, the information for voice call, which is a digital signal, is selected and converted into an analog signal, and when the caller needs to interpret the number and reports the incoming information to the processor 4, the processor (3) To send the call signal. When the called party receives the call, it provides a voice call path to enable the call.

In the case of a call, when the subscriber turns off or off, the communication current is supplied, and the analog signal transmitted from the telephone 3 is converted into a digital signal and allocated to E1 or E2 bytes of the overhead frame and transmitted to the STM physical layer processing unit 2.

On the other hand, the data channel signal is selected from the overhead signal received from the STM physical layer processing unit 2 to perform a Higher Data Link Control (HDLC) protocol and transmit it to the processor 4, and vice versa In 4), the data to be transmitted to the power station performs the HDLC protocol and is loaded on the overhead of the STM frame through the STM physical layer processing unit 2 and transmitted to the power station.

2 is a block diagram of a mashing line processing apparatus according to the present invention, 21 is a frame converter, 22 is a subscriber line interface module (SLIM), 23 is a relay, 24 is an overvoltage protection circuit, 25 is a processor interface, and 26 is a complex Frequency code (DTMF) receivers 27 denote ring signal generators, respectively.

The frame conversion unit 21 receives the overhead frame from the STM physical layer processing unit 2, selects E1 and E2 information for voice communication, and loads it in an arbitrary time slot among 2.048 MHz Pulse Code Modulation (PCM) frames. A subscriber line interface module (SLIM) is transmitted.

The subscriber line interface module (SLIM) converts the received pulse code modulation (PCM) signal, which is a digital signal, into an analog signal and transmits it to the telephone 3 via the ring relay 23 and the overvoltage protection circuit 24.

On the other hand, the complex frequency code (DTMP: Dual Tone Multi Frequency) receiver 26 receives this signal when the phone 3 is in an on state, decodes the called number and transmits it to the processor interface 25.

The processor interface 25 transmits to the processor 4 when the received number matches its own number, and the processor 4 sends a subscriber line interface module through the processor interface 25 to send a call signal according to the called number. The SLIM is controlled to drive the ring relay 23, and to drive a light emitting diode LED informing of a call state. In addition, an interface between the subscriber line interface (SLIM) 22 and the processor 4 is provided for controlling the subscriber line interface module (SLIM) 22. Hooking off the telephone 3 stops supplying the call signal and driving the LED.

In the case of a call, when the telephone 3 is hooked off, the subscriber line interface module 22 supplies the call current, converts the analog signal received from the telephone 3 via the overvoltage protection circuit 24 into a digital signal. The overhead frame is transmitted to the STM physical layer processor 22 through the frame converter 21.

The ring relay 23 is connected between the subscriber line interface module 22 and the overvoltage protection circuit 24 to operate by receiving a ring signal from the ring signal generator 27. It is connected to the telephone 3 by two wires of tip and ring, and performs full duplex communication through two wires. The input / output impedance and the balanced network impedance are 600 ohms each, and the call current can flow up to 600 mA. The overvoltage protection circuit 24 is protected against overcurrent of DC current of 80 mA or more and overvoltage of 200 V or more. The call signal is 40 ~ 80V _RMS , and the maximum current at the output short-circuit should be 50mA or less.

The HDLC controller 28 receives the data channel from the frame converter 21 to perform the HDLC protocol, transmits the received data to the processor 4, and performs the HDLC protocol on the data received from the processor 4 to perform a frame. It transmits to the conversion part 21. The data channel transmits 192 Kb / s data of DCC 1 to 3 bytes for the relay section and 572 Kb / s data of DCC 4 to 12 bytes for the multiplexing section.

The frame converter 21 selects these data channels in the overhead, converts them into serial data of 192Kb / s and 572 Kb / s, and transmits them to the HDLC controller 28 and the 192Kb / received from the HDLC controller 28. It inserts s and 572Kb / s serial data into the data channel.

3 is a frame structure and timing diagram according to the present invention, and shows a frame structure and timing diagram between the frame converter 21 and the subscriber line interface module 22.

The audio signal is a digital signal coded by pulse code modulation (PCM), and performs two-way communication in four wires. A master clock (MCLK) of 2.048 MHz and a transmission frame signal (FSx) 32 of 8 KHz, It consists of a reception frame signal (FSx) 35, a transmission time slot (TSx) 33, a reception time slot (TSr) 36, transmission data (Dx) 34, and reception data (Dr) 37. . There are 32 time slots per frame of 8KHz, and one is selected so as not to be duplicated. The transmission time slot (TSx) 33 represents the first time slot, and the next 8 bits become the second slot. The transmission / reception data 34 and 37 are digital signals obtained by pulse code modulation (PCM) coding of voice signals, and are transmitted from most significant bits (MSB).

As described above, the present invention provides an ATM relay line that is miniaturized to easily provide voice and data communication regardless of an internal state of an ATM layer in an ATM relay line matching device, and is mounted on an ATM relay line matching device to transmit at high speed using an optical cable. There is an effect that can increase the reliability, increase the maintenance and efficiency in the initial installation.

Claims (1)

Receives an overhead frame from an external STM physical layer processor 2, selects and transmits information for voice communication in a time slot, receives a digital signal, and transmits the received digital signal to the STM physical layer processor 2, over the frame. Frame conversion means (21) for selecting and transmitting the data channel in the head and inserting Higher Data Link Control (HDLC) data into the data channel; After receiving the data channel from the frame converting means 21 to perform the HDLC protocol and transmitting the received data to the external processor 4, and performing the HDLC protocol on the data received from the processor 4 to convert the frame HDLC control means 28 for transmitting to the means 21; Processor matching means (25) for matching with said processor (4); The processor is matched with the processor 4 through the processor matching means 25, and the voice information, which is a digital signal, is converted from the frame matching means 21 into an analog signal and transmitted, and the analog signal is received as a digital signal. Subscriber line matching means (22) for converting and transmitting the frame conversion means (21); A complex frequency code (DTMP) receiving means (26) for decoding a called number input from said subscriber line matching means (22) and transmitting it to said processor matching means (25); Ring signal generating means 27 for generating a ring signal; A ring relay (23) connected to the subscriber line matching means (22), the ring relay (23) being operated by receiving a ring signal from the ring signal generating means (27) under the control of the processor (4); And protection means (24) connected between the ring relay (23) and an external telephone (3) to block overvoltage / current.