KR100191434B1 - The miltiplexing apparatus of the video service connection system with the leased telephone line - Google Patents

Abstract

The present invention relates to a video service access system multiple device that has established a dedicated telephone line. In the signal line transmitted to a subscriber via a conventional exchange, a communication line is established by establishing a dedicated telephone line between a central station and a distribution center. It has the advantage of providing improved service through rapid error recovery and maintenance by enabling situation judgment while monitoring the device directly within each communication device.

Description

Multi-device video service access system with dedicated telephone line

1 is an overall block diagram of a multi-device according to the present invention.

FIG. 2 is a detailed block diagram of each part of FIG.

* Explanation of symbols for main parts of the drawings

10: switch 20: first 1E1 signal interface

30: central station side DS3 communication multiple device 31,51: multiplexer

31-1: First E1 Signal Pipeo 31-2: 19th Channel Multiplexer

31-3: 29-channel multiplexer 31-4: 2-channel multiplexer

32,52: demultiplexer 32-1: second E1 signal pipo

32-2; 19th Channel Demultiplexer 32-3: 29th Channel Demultiplexer

33: first telephone matching unit 33-1: digital switch

32-4: 2-channel demultiplexer 33-2: E1 framer interface

33-3: COMEC filter 33-4: Subscriber line interface unit (SLIC)

33-5: ring signal generator 33-6: central processing unit

34,54: DS3 signal interface unit

34-1: DS3 Framer Leaf Reamer

34-2: DS3 Bipolar Converter Inverter

40,60: Telephone 50: Distribution center side DS3 communication multi-device

53: second telephone matching unit 70: second E1 signal interface

80: optical transmission unit

The present invention relates to a video service access system multiple device that has established a dedicated telephone line, and establishes a dedicated telephone line between multiple communication channel multiple devices, and determines information exchange and communication error between communication channels composed of many subscribers. The present invention relates to a video service access system multiple device that has established a dedicated telephone line to enable rapid maintenance.

In general, a communication / video integrated service access system is currently used within a video service range providing a cable T.V service using an optical cable.

Such a video service system has a considerable amount of information transmitted / received between a central station for the cable T.V service and a distribution center for distributing signals transmitted from the central station and inputting them to a plurality of subscribers.

As a result, an error may occur during transmission and reception of information, and an error may occur in the central station and the distribution center itself, which may cause a problem in prompt service provision.However, communication between the central station and the distribution center may be possible. After the service was provided from the exchange to the subscriber because the call line was not provided, no prompt method was provided except for reporting the problem to the service provider and informing the service provider.

Accordingly, the present invention provides a dedicated telephone line between the center and the distribution center in order to improve the conventional problems as described above, when any error occurs between each other, the user immediately monitors the system and exchanges information through the dedicated telephone line. The purpose is to allow rapid maintenance.

In other words, in the communication integrated video integrated service access system comprising a DS3 communication multiple device of a central station side and a DS3 communication multiple device of a distribution center, an E1 signal frame input from an exchange to the DS3 communication multiple device of the central station side is input. Dedicated phone installed in distribution center by separating the dedicated phone channel of E1 frame input through demultiplexer while reconfiguring the frame by sending dedicated phone channel to the multiplexer and transmitting the reconstructed frame to multiplexer. And a first telephone matching section for establishing a call line with the telephone; In the distribution center side DS3 communication multi-device, a video service access system multiple device is implemented by additionally configuring a second phone-matching unit that performs the same function as the first telephone matching unit.

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

The configuration diagram of a multi-device including a telephone matching unit (B-channel matching unit) implemented by the present invention can be illustrated as shown in FIG. 1, which multiplexes 30 channels of a general telephone output from the switch 10. FIG. A first E1 signal interface 20 for generating an E1 signal consisting of frames of 2,048 Mbps; Multiplexing unit constituting a digital signal level 3 (Digital signal Level 3: about 45M signal equal to 28T1 (28 1, 544 = 43,232M): DS3 hereinafter) by multiplexing 18 channels among the input channels ( 31), a demultiplexer 32 for demultiplexing DS3 class frames inputted from the distribution center into 18 channels of the E1 signal, and a dedicated telephone channel is added to the E1 signal frames inputted from the exchanger 10. Reconstruct the frame and transmit the reconstructed frame to the multiplexer 31, and separates the dedicated telephone channel of the E1 frame input through the demultiplexer 32, installed in the distribution center A first telephone matching section 33 for establishing a dedicated telephone line and a call line, and a DS3 signal interface section 34 for connecting signals input / output to the multiplexing / demultiplexing sections 31 and 32 to the optical transmission section 80. A central station side DS3 communication multiple device 30; A telephone (40) used exclusively in the central station side DS3 communication multiple device (30); A distribution center side DS3 communication multiple device (50) having the same configuration (51, 52, 53, 54) as the configuration (31, 32, 33, 34) of the center sphere side DS3 communication multiple device (30); A telephone (60) used exclusively in the distribution center side DS3 communication multiple device (50); A second E1 signal interface 70 which is responsible for matching between the distribution center side DS3 communication multi-device 50 and the subscriber; An optical transmitter 80 for transmitting a DS3 unit signal between the communication multiple devices 30 and 50; For reference, the chip used in the DS3 framer reamer 34-1 is a DS3 general-purpose chip, which is a TXC-03401 chip implemented by Trans Switch.

The multiplexer 31 checks whether there is a frame error of the E1 frame signal input from the switch 10, and compensates the phase difference between the input signal and each of the nine channel multiplexers 31-2 and 31-3. A first E1 signal pipo 31-1; 9 channels among the 18 channels of 2.048 Mbps outputted from the E1 signal pipeo 31-1 to remultiplex 9 frames of the 18 channels of about 20 Mbps to be reconfigured into a frame of about 20 Mbps First and twenty-ninth channel multiplexers 31-2 and 31-3; Two 20Mbps channels outputted from the nine-channel multiplexers 31-2 and 31-3 are multiplexed according to DS3 frames by a control signal input from the DS3 framer 34-1 and reconfigured into frames of about 44Mbps. It consists of a two-channel multiplexer 31-4.

The demultiplexer 32 demultiplexes a frame output from the DS3 framer leaframer 34-1 into 2 channels of 20 Mbps by a control signal input from the DS3 framer 34-1. -4) and; First and twenty-ninth channel demultiplexers (32-2, 32-3) for demultiplexing two channels input from the two-channel demultiplexer (32-4) into nine channels of 2.048 Mbps, respectively; 18 channels of the E1 signals output from the first and second demultiplexers 32-2 and 32-3 are inputted to perform frame error check and a phase difference between the communication multiplexer 30 and the switch 10. It consists of a second E1 signal pipeo 32-1 to compensate for.

The first telephone matching unit 33 multiplexes the E1 frame inputted from the switchboard 10 and the dedicated telephone channel inputted from the codec filter 33-3 to the E1 frame interface 33-2. A digital switch 33-1; A time slot is allocated to the codec filter 33-3 using a 2.048 Mbps clock (reference clock). On the contrary, the central processing unit 33 analyzes signaling information and voice data on the channel allocated to the dedicated telephone from the input signal. -6) and an E1 framer interface 33-2 for outputting to the codec filter 33-3; A codec filter 33-3 which amplifies and band-filters the transmission signal, digitizes the analog audio signal using a pulse coding scheme (PCM), and conversely converts the digital signal of the pulse coding scheme into an analog voice signal; Transmit / receive to detect hook on / off of dedicated telephone line, control ring signal generation, and time-divisionally process analog voice signal data converted to digital 8-bit pulse coded signal For this purpose, a two-line loop is formed on the dedicated telephone side, and the subscriber line interface unit (hereinafter referred to as SLIC) 33-4, which allows the transmission / reception to be converted into four lines, on the telephone line side. ; A ring signal generator 33-5 for generating a ring signal under the control of the SLIC 33-4; It is composed of a central processing unit (33-6) for controlling each unit to select the initialization and mode.

The DS3 interface unit 34 includes: a DS3 framer releamer (34-1) for outputting various control signals required for the DS3 frame error check, DS3 multiplexing, and demultiplexing; 44.736Mbps NRZ (None-Return to Zero) output from the DS3 framer reamer 34-1, which is used to record digital information on a magnetic surface such as a magnetic tape or drum in the process of recording data to a storage device. DS3 bipolar converter in which the encoded data is encoded using B3ZS (Bipolar with 3 Zero Substitution: 44.736Mbps line code format) encoding method, and then converted into bipolar data and transmitted to a transmission device. It consists of a converter 34-2.

Operation of the multiple device including the B-channel matching units 33 and 53 of the present invention configured as described above is performed as follows.

When the signal generated from the switch 10 passes through the E1 signal interface 20, it is converted into an E1 signal transmitted in the multiple device, and the signal is converted into the first and 29th channel multiplexers of the multiplexer 30. 31-2, 31-2 is converted into a frame of 20Mbps and then input to the two-channel multiplexer 31-4.

In this case, the 20 Mbps frame includes information input from a dedicated telephone channel on a signal input through the 18th time slot (E1 # 18) of the E1 frame, which is connected to the central station side DS3 communication multi-device 30. The hook-on / off state of the telephone 40 is detected at the subscriber line interface 33-4, and when the hook-off state is detected, the user detects the use of the telephone 40 and receives a signal.

The signal input through the subscriber line interface 33-4 is subjected to amplification and band filtering through the codec filter 33-3, and then digitized by pulse-coding modulation of the analog voice signal. They are assigned under the control of the E1 framer interface 33-2 using the clock.

The signal is then carried together in the eighteenth time slot through the switching of the digital switch 33-1. A frame carrying such data is included in each nine-channel multiplexer 31-2, 31-3. Then, the two-channel multiplexer 31-4 converts the frame into a DS3 frame of 44.736 Mbps (about 40 Mbps) according to a control signal input from the DS3 framer reamer 34-1. The data converted into DS3 frames are finally bipolarly converted through the DS3 bipolar converter inverse converter 34-2, and then transmitted to the distribution center side DS3 communication multi-device 50 through the optical transmitter 80, where the data is transmitted back to each subscriber. Is sent to.

In addition, the data transmitted through the dedicated telephone line is transmitted to the DS3 communication multi-device 50 on the distribution center side, and then the data contained in the 18th time slot is inputted to the codec filter through the switching of the digital switch. The input digital voice signal is converted into an analog voice signal and transmitted to the telephone 60 connected to the distribution center side DS3 communication multi-device 50 through the subscriber line interface.

At this time, when the analog voice signal is input to the telephone 60, the ring signal generator raises the ring under the control of the subscriber line interface to recognize that the telephone is received.

As described above, the process of establishing a dedicated telephone line between each communication multi-device 30 and 50 is the same as that of the central station-side DS3 communication multi-device 30 because the configuration in the distribution center side DS3 communication multi-device 50 is the same as that of the drawing and symbols. It was described in the omitted state.

In addition, in the above, the process of transmitting data through a dedicated telephone line together with the E1 frame from the central station side DS3 communication multi-device 30 to the distribution center DS3 communication multi-device 50, and the distribution center side DS3 communication multi-device 50 In the above description, a process of separating the dedicated telephone line data by receiving this signal has been described. The process of transmitting from the distribution center side DS3 communication multi-device 50 to the central station side DS3 communication multi-device 30, which is the reverse flow thereof, is performed in the above process. This is the same as the inverse order of, and detailed description will be omitted by passing through the demultiplexer.

As such, the present invention provides a telephone line for establishing a dedicated telephone line between the DS3 communication multi-device 30 of the central station and the DS3 communication multi-device 50 of the distribution center in a communication system providing cable TV services using an existing optical cable. The matching unit (B-channel matching unit) is additionally configured to enable the rapid transmission / reception of errors occurring during the information exchange between the central station and the distribution center and the exchange of information for maintenance through dedicated telephone lines.

As described in detail above, the present invention establishes a communication line by establishing a dedicated telephone line between a center and a distribution center in a signal line transmitted to a subscriber through a conventional exchange, thereby generating errors and maintenance work in each communication device. The advantage of providing improved service through rapid error recovery and maintenance is that it allows the situation judgment while monitoring the device directly.

Claims (2)

A communication / video integrated service access system multiple device comprising a central station side DS3 communication multiple device 30 and a distribution center side DS3 communication multiple device 50, comprising: a switch to the central station side DS3 communication multiple device 30; A dedicated telephone channel is added to the E1 signal frame inputted from (10) to reconstruct the frame and transmit the reconstructed frame to the multiplexer 31, and is input through the demultiplexer 32. A first telephone matching section 33 for establishing a call line with a dedicated telephone 60 installed in the distribution center by separating a dedicated telephone channel of the E1 frame; In the distribution center side DS3 communication multi-device 50, a second telephone matching unit 53 which performs the same function as the first telephone matching unit 33 is configured to add a dedicated telephone line image Service Access System Multiple Device The E1 frame interface 33 according to claim 1, wherein the first telephone matching unit 33 multiplexes an E1 frame input from the switch 10 and a dedicated telephone channel input from the codec filter 33-3. A digital switch 33-1 to -2); A time slot is allocated to the codec filter 33-3 by using a reference clock. On the contrary, the signal allocated to the dedicated telephone is analyzed from the input signal, and the signaling information and the voice data are analyzed. An E1 framer interface 33-2 for outputting to the filter 33-3; A codec filter 33-3 which amplifies and band-filters a transmission signal, digitizes an analog audio signal using a pulse coding method (PCM), and conversely converts a pulse coding digital signal into an analog voice signal; Detects hook on / off of a dedicated telephone line, controls ring signal generation, and transmits / receives channels to time-divisionally process analog voice signal data converted to digital 8-bit pulse coded signals. And a two-line loop is formed on the dedicated telephone side for this purpose, and the subscriber line interface unit (SLIC) 33-4 for converting the transmission / reception into four lines on the telephone line side; A ring signal generator 33-5 for generating a ring signal under the control of the SLIC 33-4; A central processing unit (33-6) for controlling the respective units to select an initialization and a mode; And the second telephone matching unit (53) has the same configuration as the first telephone matching unit (33).