KR0131558B1 - High speed data leased circuit service apparatus - Google Patents

Abstract

The present invention relates to a dedicated line service apparatus for high-speed data, which accommodates up to two data terminals on one telephone line using ISDN (Intergrated Service Digital Network) subscriber transmission technology and CEPT E1 inter-transmission technology. An object of the present invention is to provide a dedicated line service apparatus capable of transmitting a high speed data dedicated line service of 64 Kbps.

In order to achieve the above object, the present invention provides a plurality of waveform means for converting data input by matching with two terminals to a B channel of 64 Kbps, respectively, and transmitting and receiving the plurality of waveform means with time division and echo cancellation methods. And multiplexing the inputted data and matching with the E1 relay line to implement dedicated line multiplexing means for performing data communication with the remote station.

Description

High speed data line service device

1 is an overall configuration diagram showing a conventional leased line service apparatus.

2 is an overall configuration diagram showing a dedicated line service device of the present invention.

3 is an internal configuration diagram of a dedicated line multiplexer which is a component of FIG.

4 is a detailed block diagram of a line control unit and a line interface unit which are the components of FIG.

5 is a detailed configuration diagram of a trunk that is a component of FIG.

6 is an internal mounting diagram of a dedicated line multiplexing unit.

* Explanation of symbols for main parts of the drawings

21, 22: waveform conversion unit 23: dedicated line multiplexing unit

21a, 22a: selection module section 21b, 22b: main module section

31: maintenance processor unit 32: peripheral device processing unit

33: line interface unit 34: line control unit

35: trunk 36: system status display

37: operator terminal 38: system test unit

33a: line terminal unit 41: peripheral device processing matching unit

42: common control unit 43: PCM control unit

43a: digital switching unit 43b: analog switching unit

43c: PLL 43d: trunk matching

51: matching unit 52: control unit

53: PCM: matching section 54: clock generator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dedicated line service device capable of providing data leased line service using an ISDN (Intergrated Service Digital Network) subscriber transmission technology and a CEPT E1 inter-station transmission technology.

In general, leased lines are used in public data networks or private networks rather than public telephone networks, and DDS (56Kbps transmission rate) -class high-speed data services are provided in countries using T1 transmission technologies such as Korea, the United States, and Japan. (Digital Data System) is used.

This will be described with reference to FIG. 1 as follows. First, serial data of a synchronous data terminal device (DTE) 1 such as a G4 facsimile (FAX) or a host computer (hereinafter referred to as DTE) 1 or an asynchronous data terminal device 1a such as a personal computer ( In order to transmit serial data far away, a data communication equipment (DCE) such as a modem (MODEM) 3a using an analog transmission technology or a data service unit (DSU) 3 using a digital transmission technology is required. 1a is connected to the modem 3a or the DSU 3 by the RS232C interface 2a or the V.35 serial interface 2.

In addition, the data output signal of the modem 3a or the DSU 3 is transmitted through a telephone line to a Subscriber Lihe Circuit (SLC) 4c or a DP (Data Port) 4a of a channel bank 4, which is a transmission equipment. And multiplexed by the channel bank 4, matched with the E1 / T1 relay line 5 by the trunk 4b, and then transmitted remotely through the E1 / T1 relay line 5 for another terminal or data. The connection with the base provides various data services.

Here, the low speed data terminal 1a of the asynchronous type up to 19.2 Kbps is matched with the RS232C interface 2a. The modem 3a is mainly used as the DCE, and the data service of 4.8 Kbps or less uses one telephone line (two-wire), Data services above 4.8 Kbps require two phone lines.

On the other hand, the 56Kbps synchronous high-speed data terminal 1 is matched with the V.35 interface 2, the DSU 3 is used as the DCE, and two telephone lines (four-wire) are required.

In particular, in transmitting and receiving 56Kbps-class high-speed data, when using one telephone line, signal transmission and reception are not performed smoothly. Although it is intended to facilitate the transmission, there was a problem that results in an increase in cost.

In addition, the dedicated line service device has a problem that it is difficult to track the cause of the failure when a failure occurs because of a weak maintenance function.

It is a first object of the present invention to provide a dedicated line service apparatus which provides economic efficiency by providing two channels capable of two-way simultaneous communication through one telephone line using ISDN transmission technology.

A second object of the present invention is to provide a high speed data dedicated line service apparatus by having a 64Kbps data transmission capability on one telephone line using ISDN transmission technology.

It is a third object of the present invention to provide a data dedicated line service apparatus which enables economics and improves convenience by enabling one telephone line to require two telephone lines for data transmission of 4.8 Kbps or more.

A fourth object of the present invention is to provide a data dedicated line service apparatus which can accommodate two terminals in one data communication apparatus to minimize the cost of a communication facility.

It is a fifth object of the present invention to provide a data dedicated line service apparatus which makes it easy for an operator to provide various test functions and centralized maintenance functions.

A sixth object of the present invention is to provide a data dedicated line service apparatus extending the transmission distance between a subscriber and a network.

In order to achieve the above object of the present invention, a plurality of waveform converting means for converting data input in correspondence with two terminals to a high speed B channel, one telephone provided with two channels each with the plurality of waveform converting means It is connected by line to execute two-way simultaneous communication, multiplexing input data, and matching with E1 relay line, and it is composed of dedicated circuit switching means for executing data service with remote station.

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

2 is an overall configuration diagram showing an embodiment of the present invention, which matches with a low speed (19.2 Kbps or less) asynchronous terminal 1a having an RS232C interface function and converts it into a B channel of high speed (64 Kbps) and provides two RS232C interfaces. Matching waveform converting section 21, matching with high speed (56Kbps or 64Kbps) synchronization terminal 1 with V.35 interface function, converting into B channel of high speed (64Kbps) and matching with two V.35 interfaces It is connected to each of the possible waveform converter 22 and waveform converters 21 and 22 by a single telephone line, and transmits and receives in a time division method 2B1Q (2Binary 1Quaternary) and echo cancellation method, thereby enabling two-way simultaneous communication and one phone call. Dedicated line that allows two channels to be provided on the line, executes data service with transmission rate of 64Kbps, and communicates with the power station by multiplexing the input data by matching with E1 relay line It consists of the multiplexing part 23.

At this time, the waveform converting unit 21 is composed of a main module unit 21a for processing the U interface function, and a selection module unit 21b having an RS232C interface port function, and the B-channel converting method is CCITT V. In accordance with .110, the use of the RS232C interface port is controlled by the dedicated line multiplexer 23.

In addition, the waveform conversion section 22 is composed of a main module section 22a for processing the U interface function and a selection module section 22b having a V.35 interface port function, and the B-channel conversion method uses CCITT V.110. The use of the V.35 interface port is controlled by the dedicated line multiplexer 23.

As shown in FIG. 3, the dedicated line multiplexing unit 23 manages the E1 PCM link state through the B bus and manages the channel usage state for each subscriber, and the maintenance through the B bus. Under the control of the processor 31, four peripheral processing units 32, which perform various control functions for operating the E1 PCM line and perform various control functions for the subscriber matching module, match each with a 2-wire telephone line. Up to 16 line interface units 33 can be controlled by configuring a subscriber matching module together with the line interface unit 33 and the line interface unit 33 composed of four line terminal units 33a of 2B + 1D. The line controller 34 which is connected to the peripheral device processor 32 in a corresponding manner through a bus to transmit signaling data, and controls the peripheral device processor 32 through the L bus. H. Perform various controls necessary for the operation of the E1 PCM line, interface with the E1 PCM link, transfer the data received from the power to the line control unit 34, receive the PCM data from the line control unit 34, and transmit the data to the power station. Under the control of the maintenance process unit 31 through the trunk portion 35, L bus connected in one-to-one correspondence with the 32, the subscriber state, the E1 PCM link state, the state of the peripheral processing unit 32, the power state, etc. System status display unit 36 to display the overall status of the system so that the operator can know, the exerciser terminal 37 to match the RS232C port of the maintenance process unit 31 to execute the operations necessary for operating the system, Under the control of the maintenance process unit 31 through the L bus performs the subscriber I / O test and performs the E1 PCM link loop test (link loop test) It is composed of a system test unit 38.

In addition, as shown in FIG. 4, the line interface unit 33 performs one E1 PCM matching function by grouping four through a parallel bus, and each of the line terminal units 33a is connected to a line control unit through a GC1 bus. 34) receive various control signals.

As shown in FIG. 4, the line controller 34 is composed of a memory composed of dual port RAM and a peripheral circuit, and a peripheral device matching section 41 that matches the peripheral processing section 32, and a 16-bit microcomputer. A common control unit 42, which is composed of a processor MC68302 and a peripheral circuit, which controls the line interface unit 33, and four line terminal units 33a are connected to the GCI bus as a group, respectively, and the trunk unit 35. And 4.096 Mbps PCM highways, respectively, to output various control signals necessary to perform the functions of the line terminal unit 33a through the GCI bus, and control the data of the line interface unit 33 and the common control unit 42. It is composed of four PCM controllers 43 for outputting signals through the PCM highway and for outputting signaling data to the peripheral device processor 32 through the common controller 42 and the peripheral device processing matching unit 41.

Each of the PCM control units 43 transmits various control signals necessary for performing each function of the line terminal unit 33a, and the digital switching unit 43a which separates the B channel and the D channel. In the case of using one B channel per line, the analog interface 43b for accommodating the other line interface unit 33 and the system clock outputted from the trunk 35 are synchronized with the line interface 33. PLL (Phase Locked Loop) unit 43c to be supplied to the trunk, and a trunk matching unit 43d for transmitting data and various control signals to the trunk unit 35 via a PCM highway of 4.096Mbps.

As shown in FIG. 5, the trunk part 35 is controlled by the peripheral part processor 32 through the matching part 51 and the trunk matching part 43d that match with the peripheral device processing part 32 through the L bus. Control unit 52 for performing various control functions required for the E1 PCM function, PCM matching unit 53 for receiving data from the power station and transmitting the data received from the line control unit 34 to the power station in accordance with the E1 PCM link. The clock generator 54 is configured to supply a clock required by the line controller 34 to a clock set by setting a master clock as a strap option.

Therefore, the dedicated line multiplexer 23 may be matched with up to 480 main module units, which will be described in more detail as follows.

As shown in the mounting diagram of FIG. 6, the dedicated line multiplexing unit 23 operates by operating four peripheral device processing units 32 in one maintenance process unit 31, and one peripheral device processing unit 32 operates. Each of the two line control unit 34 and two trunk portion 35 is controlled, the line control unit 34 is composed of four PCM control unit 43, respectively.

In addition, four line interface units 33 are connected to the PCM control unit 43 as a group, and one line interface unit 33 is constituted by four line terminal units 33a. ) Is connected in a one-to-one correspondence with the selection module unit. As a result, 32 channels are provided to one PCM control unit 43, and four line interface units 33 match with one E1 PCM line. The multiplexer 23 matches up to 480 2B + 1D subscriber lines (480 main module parts) and up to 64 E1 PCM links.

Operation of the embodiment of the present invention configured as described above is as follows.

First, the selection module 21a of the waveform converter 21 serves as an RS232C interface port so that the asynchronous terminal of low speed (19.2 Kbps or less) matches the main module 21b, and the waveform converter 22 is selected. The module unit 22a serves as a V.35 interface port to match the high speed (56Kbps or 64Kbps) synchronous terminal (G4 facsimile, host computer) with the V.35 interface function and the main module unit 22b, and the main module. The sections 21b and 22b convert the input signal into a high-speed B channel according to CCITT V.110 and output it.

Also, as shown in FIG. 2, each of the main module portions 21b and 22b is connected to two selection module portions 21a having an RS232C interface port function or two selection module portions 22a having a V.35 interface port function. Can be connected to the selection module section 21a having the RS232C interface function and the selection module section 22a having the V.35 interface port function, and the signals of the respective selection module sections 21a and 22a It can be implemented to convert to B channel.

The dedicated line multiplexer 23 and the waveform converters 21 and 22 perform data transmission and reception in an echo cancellation manner to enable simultaneous bidirectional communication on one telephone line, and to transmit data in a time-division manner. It can provide two 64Kbps B channel.

The maintenance process unit 31 of the dedicated line multiplexer 23 is in charge of service operation and maintenance of the system, manages the E1 PCM link state through the B bus, manages the channel use state for each subscriber, and manages the L bus. The PCM link alarm, subscriber line alarm, and all alarm statuses are collected and transmitted to the system status display part 36 through interworking with the system status display part 36, while the line interface part 33 works in conjunction with the system test part 38. Test the subscriber line of and connect with operator terminal 37 using RS232C port.

The peripheral processing unit 32 is controlled by the maintenance process unit 31 through the B bus and controls the trunk unit 35 and the line control unit 34 through the L bus. It performs a function and transmits various control signals for the subscriber matching module to the line controller 35.

The peripheral device processing matching section 41 is composed of a memory composed of dual port RAM and peripheral circuits so that the peripheral device processing section 32 and the line control section 34 match, and the common control section 42 is 16. The bit microprocessor MC68302 and peripheral circuits control the analog switching unit 43b and the digital switching unit 43a and the line interface unit 33.

Although the analog switching unit 43b switches to accommodate another group of line interface units 33 when one B channel is used even though two B channels are provided on one telephone line. 43a) transmits various control signals required to perform the functions of each of the line terminal units 33a in the form of a GCI bus, separates the B channel and the D channel, and transmits data of the D channel to the common controller 42. The data of the channel is transmitted to the large station through the trunk matching section 43d.

The PLL unit 43c synchronizes the system clock output from the trunk unit 35 to the line interface unit 33, and the trunk matching unit 43d receives the system clock from the trunk unit 35, and the PCM controller 43 B-channel data signal is transmitted and received to the trunk 35 through the PCM highway of 4.096Mbps.

The line interface unit 33 is connected to one PCM control unit 43 through the GCI bus and is matched with the E1 PCM of the trunk unit 35 through the PCM highway.

Each of the line terminal units 33a receives the B channel data signal and various control signals from the line control unit 34 via the GCI bus and defines them as one telephone line (two-wire type).

The matching part 51 of the trunk part 35 causes the peripheral device processing part 32 and the control part 52 to match with each other via the L bus, and the control part 52 receives the peripheral device processing part 32 through the trunk matching part 43d. The control unit performs various control functions required for the E1 PCM function by receiving dml control, and connects the B-channel data signal to the PCM matching unit 53 through the trunk matching unit 43d.

The PCM matching unit 53 matches data with the E1 PCM link, receives data from the power station, and transmits B-channel data received from the line control unit 34 and various control signals from the peripheral device processing unit 32 to the power station. do.

In this case, the clock generator 54 supplies a clock required by the line controller 34 to a clock set by setting a master clock as a strap option.

On the other hand, the system status display unit 36 is controlled by the maintenance process unit 31 through the L bus to display the overall state of the system such as the subscriber state, the E1 PCM link state, the state of the peripheral device processing unit 32, and the power state. The display is displayed to the operator so that the operator terminal 37 matches with the RS232C port of the maintenance processor unit 31 to execute an operation required for system operation, and the system test unit 38 uses the L bus. Under the control of the maintenance process unit 31, the subscriber I / O test is performed and the E1 PCM link loop test is performed.

The present invention configured and operated as described above has the following effects.

First, the conventional line service apparatus of the related art provides one data service with one or two telephone lines, but the present invention can provide two data services with one telephone line. The effect is reduced to 4.

In addition, one dedicated line service device of the prior art department can only transmit data of 4.8Kbps or less on a telephone line, but the present invention can transmit a large amount of data at the same time by enabling high-speed data transfer of up to 64Kbps on a single telephone line. Higher transmission efficiency

The conventional line service apparatus of the prior art requires two subscriber lines to transmit data of 4.8 Kbps or more, but the present invention is capable of transmitting on one telephone line, so that two telephone lines must be arranged as well as a half reduction of the line. The difficulty is solved.

The waveform converter of the prior art can accommodate only one terminal, but the present invention can accommodate two terminals in one waveform converter, thereby reducing communication equipment costs by half.

The conventional line service apparatus of the prior art does not have its own maintenance function, but the present invention can check the presence or absence of internal abnormality within the subscriber matching circuit in the telephone station, and check the abnormality, presence, and absence of the line and the terminal. It is equipped with a network loop function and the in-test function for checking if there is no circuit abnormality in the telephone station at midnight, and the out-test for checking the abnormality of the subscriber line and terminal. By performing (out test) function, there is an effect that can provide high quality service without error.

The present invention has the effect of extending the transmission distance between the subscriber and the network by 5 km or more by reducing the line distance by half by the time division method and the echo cancellation method.

Claims (20)

In accordance with the two terminals, the data inputted from the two terminals are converted into 6Kbps B channel according to CCITT Recommendation V.110, respectively, and then output on the two-wire subscriber line. The input signal is 64Kbps B A plurality of waveform converting means comprising a main module means for converting into a channel and two selection module means serving as an RS232C interface port for matching two low speed asynchronous terminals and one main module means. Dedicated line multiplexing means for transmitting and receiving each of the plurality of waveform converting means and time division and echo cancellation methods, and multiplexing the data input through the two-wire subscriber line to match the E1 relay line to perform data communication with a remote station. High speed data dedicated line service device comprising a. In accordance with the two terminals, the data input from the two terminals are converted into B channels of 64 Kbps according to CCITT Recommendation V.110, respectively, and then output on the two-wire subscriber line. A plurality of waveform converting means comprising a main module means for converting into a channel and two selection module means serving as a V.35 interface port for matching two high speed synchronous terminals and one main module means. Dedicated line multiplexing means for transmitting and receiving each of the plurality of waveform converting means and time division method and echo cancellation method, and multiplexing data input through the two-wire subscriber line, matching data with an E1 relay line, to perform data communication with a remote station. High speed data dedicated line service device comprising a. In accordance with the two terminals, the data input from the two terminals are converted into B channels of 64 Kbps according to CCITT Recommendation V.110, respectively, and then output on the two-wire subscriber line. A selection module means serving as an RS232C interface port for matching the main module means for converting to a channel, the low-speed asynchronous terminal and the main module means, and a V.35 interface port for matching the high speed sync terminal and the main module means. A plurality of waveform conversion means composed of selection module means. Dedicated line multiplexing means for transmitting / receiving at right angles to the plurality of waveform converting means in time division and echo cancellation schemes, multiplexing data input through the two-wire subscriber line, matching data with an E1 relay line, and performing data communication with a remote station. High speed data dedicated line service device comprising a. 4. The system of claim 3, wherein the dedicated line multiplexing means comprises: A maintenance process unit 31 for managing the E1 PCM link state and managing the channel usage state for each subscriber; A peripheral processing unit 32 performing various control functions for operating the E1 PCM line under the control of the maintenance processing unit 31 and outputting various control signals for the subscriber matching module; A line interface unit 33 that matches four telephone lines (two-wire); A line control unit 34 constituting a subscriber matching module together with the line interface unit 33 and transmitting signaling data to the peripheral processing unit 32; Under the control of the peripheral processing unit 32, the controller performs various controls necessary for the operation of the E1 PCM line, and interfaces with the E1 PCM link to transfer the data received from the power station to the line control unit 34 and from the line control unit 34. Trunk portion 35 for receiving the PCM data and transmits to the power station; A system status display unit 36 which controls the maintenance process unit 31 to display an overall state of the system so that an operator can know the system; An operator terminal (37) matching with the RS-232C port of the maintenance processor (31) to execute an operation required for operating the system; And a system test unit (38) for performing subscriber I / O test under the control of the maintenance process unit (31) and performing E1 PCM link loop test. The high-speed data leased line according to claim 4, further comprising a system status display unit (36) for controlling the maintenance process unit (31) to display the overall status of the system so that an operator can know. Service device. The method of claim 5, wherein the line control unit (34); A peripheral device processing matching section 41 matching with the peripheral device processing section 32; The control signal of the peripheral device processor 32 is transmitted to the line interface unit 33 and the trunk 35, and the signaling data of the line interface unit 33 is transmitted to the peripheral device processor 32 High speed data dedicated line service device, characterized in that consisting of a PCM control unit (43). The method of claim 5, wherein the trunk portion (35); A matching unit 51 matching with the peripheral processing unit 32; A control unit 52 performing various control functions required for the E1 PCM function under the control of the peripheral device processing unit 32; A PCM matching unit 53 for matching data with the E1 PCM link and receiving data from the large station and transmitting the data received from the line control unit 34 to the large station; And a clock generator (54) for supplying a clock required by the line controller (34) to a clock set by setting a master clock. The method of claim 6, wherein the PCM control unit 43; A digital switching unit (43a) which transmits a control signal for performing the function of the line interface unit (32) and allocates two B channels to be used; An analog switching unit 43b for accommodating the line interface unit 33 of another group when the line interface unit 33 of the group currently being used uses one B channel per line; A PLL section 43c for synchronizing the system clock output from the trunk section 35 to the line interface section 33; High speed data dedicated line service device, characterized in that it is composed of a trunk matching section (43d) for transmitting the data and control signals of the line interface unit (33) to the trunk (35). 9. The process according to claim 6, 7, or 8, wherein the maintenance process section 31 comprises: A high speed data dedicated line service device characterized by matching with a peripheral device processing unit (32) through a B bus. 10. The method according to claim 9, wherein the maintenance process section (31) is; High-speed data dedicated line service device, characterized in that one to four matching with the peripheral device processing unit (32). 9. The device of claim 6, 7, or 8, wherein the peripheral processing unit (32); High speed data dedicated line service device characterized in that it matches with the line control unit (34) through the L bus. The method of claim 11, wherein the peripheral processing unit 32; High speed data dedicated line service device, characterized in that the line control unit (34) matching one to two. 7. The apparatus of claim 6, wherein the line control unit (34) comprises; A high speed data dedicated line service device comprising four PCM control units (43). The method of claim 13, wherein the PCM control unit 43; A high speed data dedicated line service apparatus characterized by controlling four line interface units (33). The method of claim 6, 7, or 8, wherein the trunk portion 35; High speed data dedicated line service device, characterized in that the matching with the peripheral processing unit (32) through the L bus. 16. The apparatus of claim 15, further comprising: a peripheral processing unit (32); High speed data dedicated line service device, characterized in that the matching with the trunk (35) one to two. 9. The process according to claim 6, 7, or 8, wherein the maintenance process section (31); High speed data dedicated line service device characterized by matching with the system status display unit (36) through the L bus. 9. The maintenance process unit (31) according to claim 6, 7, or 8, further comprising; High speed data dedicated line service device characterized by matching with the system test section (38) through the L bus. 9. The apparatus of claim 6, 7, or 8, further comprising: the line control part 34; High speed data dedicated line service device characterized in that it matches with the line interface unit (33) through a GCI bus. 9. The apparatus of claim 6, 7, or 8, further comprising: the line control part 34; High speed data dedicated line service device characterized in that it matches with the trunk (35) via a PCM highway.