CN1128561C - Method and apparatus for communicating engineering orderwire information over synchronous communications network - Google Patents

Abstract

A synchronous digital communications network comprises a plurality of node devices(301, 302, 304, 305)linked by a plurality of link devices, which communicate by means of an optical aggregate. An engineering orderwire facility is provided between node devices, the facility comprising a plurality of data terminals(306), which can be connected directly to individual node devices for communicating across the optical aggregate. The data terminals perform packetization, de-packetization and compression of engineering orderwire data, and operate over an OSI protocol stack.

Description

Method, instrument and the network of transmission engineering orderwire information on the synchronous communication network

Technical field

The present invention relates to digital communications network, particularly, but do not relate to transmission engineering data between the network components of a synchronous digital communications networks uniquely.

Background technology

In synchronous digital communications networks, for example according to synchronous digital hierarchy (SDH) network of the ITU-TG.70X1 of international telephony union recommendation or North America synchronous optical network system (SONEF) operation, such network comprises a plurality of network componentses, and network components comprises the node device that is connected by a plurality of chained devices.The example of chained device comprises connection a plurality of node devices, for example the long-distance optical fiber communication link and the optical regenerative repeater of multiplexer and interface unit.Be separated from each other between these node devices, distance approximately is tens to the hundreds of kilometer.In order to set up such synchronous digital communications networks, and on existing this synchronous communication network, carry out attended operation, all need one or more experts or engineering staff at each end points of a link.The personnel of the different end points of a link on the geographical position may from far, and to need mutual communication, purpose be move instruction and engineering information in the process that network components is installed.Because synchronizing network might be installed in region far away, Ji Chu communications facility might not put in place there, so the communication issue between the engineering staff still exists in the test running of synchronous digital communications networks equipment or maintenance process.Because network may still be under construction or the maintenance state, therefore might be able to not guarantee the normal service communication of network.Because parts need be in indoor installation, and often is in the environment of electric screen,, this communicates so just having got rid of the use mobile phone.

Universal class for early stage communication network, for example carry out the plain-old telephone system (POTS) of PDH (Pseudo-synchronous Digital Hierarchy) (PDH) method, between network components, provide the traditional means of engineering information to be to use a facility that is called as engineering orderwire (EOW).A general engineering orderwire comprises the point-to-point telephone system that is based upon in the general transmission system.This project interconnection has the load capacity of 64kbit/s, and can transmit voice data.

Here with reference to figure 1, the part of the plesiochronous network network before showing in the technology is comprising first and second node device, i.e. NE1 and NE2 that are connected by optical link 100.In order to realize engineering orderwire (EOW) facility, be respectively each network components an engineering orderwire hardware card is provided, promptly 101 and 102, they are inserted into respectively in a general telephone receiver 103 and 104.For asynchronous communication network, this general engineering orderwire is very suitable, but when being applied to synchronous digital communications networks, it just has very large restriction.

At first, communication network comprises the node device of being produced by a plurality of different manufacturers.Realization this project order wire system just relates to a specific specialized hardware card is provided, and it is installed to the nodes in communication equipment that requires.This special-purpose hardware specific is in the proprietary node device of different manufacturers, rather than International standardization.

The second, general engineering orderwire has developed at single-point and has worked on to the single-point basis.In one network, for example realize between three node devices that engineering orderwire communication then is complicated and expensive, each all requires the specialized hardware card in three node devices, and each all may belong to different proprietary manufacturers in three node devices.May be incompatible between the engineering orderwire card, desired important process is the compatibility of guaranteeing between the engineering orderwire card of every link end points.For the plesiochronous network network, when point-to-point communication is enough, can be with different ways configuration synchronization network, comprise point-to-point, annular, hub configuration.A synchronous digital network may adopt the topological structure of a complexity, and this has also caused the complexity when realizing general engineering orderwire.For example in a topological structure that comprises a plurality of interconnected ring structures, as here in Fig. 2 the institute graphic, using general engineering orderwire instrument to communicate between first node device 200 and second node device 203 relates to respectively at node device 200,201; 201,202; With 202,203 between generate three independent point-to-point engineering orderwire communications.Each node device all requires the engineering orderwire hardware of its special use, and engineering orderwire hardware needs compatible linking together, and wherein node device comprises the task equipment that different manufacturers produces.Independent point-to-point connection needs independent being linked at together so that necessary communications facility to be provided between node device 200 and 203.For the operation and the maintenance of the synchronous digital communications networks with annular or hub topological structure, this general engineering orderwire system then becomes infeasible.

People know in a synchronous transmission system, requirement is to the general provision of interconnection facility, the special-purpose interconnection channel E1 of appointment, E2, each in the byte is stored in the extention zone of 72 bytes of known STM-1 frame of the SDH of International Telecommunications Union proposed standard.But, using E1, the special-purpose interconnection channel of E2 byte is still restricted, and the main order of E1/E2 channel is the transfer of data of the 64kbit/s on a point-to-point basis.When allowing to carry out engineering orderwire communication along a series of network componentses that are connected of a link, in loop network and concentrator network and other complicated topological structure, still exist connectivity problem, the E1/E2 byte interconnection facility of being submitted to can't address this problem.

United States Patent (USP) is numbered 5,402,414 and limit " the time gas exchange instrument that is used for the special circuit of maintenance signal conveyor apparatus " by Fujitsu, announce a system, wherein revised E1/E2 byte interconnection facility, purpose is to avoid the contingent sound of scurrying.But not special addressing address loop network of this patent of being announced and concentrator network, and it still relies on general interconnection facility.

Summary of the invention

According to the present invention, the purpose of specific method and execution mode is to solve some above-mentioned problems.

According to one aspect of the present invention, the method of transmission engineering interconnection data between a kind of first and second described node device in a synchronous communication network is provided, wherein synchronous communication network comprises a plurality of node devices that are linked by a plurality of chained devices, described communication network has an operation and maintenance channel, be used for transmitting operation and maintenance information between described node device, described method comprises step:

By the lan port of described first node device, the engineering orderwire data-signal is input to described first node device;

On described operation and maintenance channel, described engineering orderwire data are sent to described second node device; With

On described operation and maintenance channel, receive described engineering orderwire data at described second node device;

Export described engineering orderwire data from the lan port of described second node device.

This method may link to each other with the ethernet port of the network components of corresponding synchronous digital communications network by the general ethernet port with general personal computer or laptop computer and fetch realization.

More preferably, the step that it is a series of packet data signals that this method also comprises described engineering orderwire packet, each packet data signals all comprises a data pay(useful) load signal and a packet oriented protocol additional signal, wherein respectively from described first and second described packet signal of node device input and output.

Comparatively preferably, described packet oriented protocol head comprises an address signal, and this address signal has been specified an address that receives data terminal that links to each other with described node device.

Comparatively preferably, be the protocol packet described engineering orderwire data that do not require the grouping confirmation of receipt according to.

Comparatively preferably, be according to an OSI(Open Systems Interconnection) protocol method described input engineering orderwire data of dividing into groups.

Described method may comprise step, compresses described engineering orderwire data.

Comparatively preferably, described compression step comprises according to Groupe Systeme Mobile data compression algorithm and compresses described engineering orderwire data.

Described method may comprise step, the described engineering orderwire data of decompress(ion).

Described communication network preferably includes a synchronous digital hierarchy (SDH) network.

Described operation and maintenance channel may comprise International Telecommunications Union the proposed standard in January, 1994 G.784 in of appointment embed control channel.A benefit like this be data communication channel in the synchronous digital hierarchy network by standardization, and can be compatible, and mutual operation reliably from the manufacturer's of different range parts.

Described communication network may comprise an American National Standard committee Synchronous Optical Network (SONET) network.

Comparatively preferably, described operation and maintenance channel comprise a synchronous digital hierarchy data communication channel, and it is to transmit in the byte D1 of synchronous transfer module (STM) Frame and D2.This makes in synchronous digital hierarchy STM-1 frame and can communicate according to the present invention outside the E2 interconnection channel except E1.Because the data communication channel in synchronous digital hierarchy uses Path selection to transmit the data of grouping, this has just been avoided the point-to-point connectivity problem relevant with general Electricity Federation winding thread in addition.

According to second aspect of the present invention, engineering orderwire instrument in a synchronous digital communications networks here is provided, comprise a plurality of node devices in the described synchronous digital communications networks, with at least one chained device, described node device is adapted to pass through the intercommunication mutually on an operation and maintenance channel of described chained device, and described instrument comprises:

Data terminal unit is used to generate the engineering orderwire data-signal;

The packet device is used for described engineering orderwire data-signal is converted to the series of data packets signal; With

A multiplexed apparatus is used for described grouped data is multiplexed to the described operation and the maintenance channel of described communication network, and described multiplexed apparatus comprises a lan port.

A described data terminal may comprise an equipment of selecting from following set; Personal computer; Laptop computer; Palmtop computer; Individual's organizer; Special-purpose computer.

Comparatively preferably, described apparatus for grouping comprises: a processor; With a data storage medium, described data storage medium storage control signal, being used to operate described processor is described sequence of data packets with described engineering orderwire conversion of signals.

Comparatively preferably, described multiplexer can receive data-signal, and the operation of described multiplexer will be multiplexed in described operation and the maintenance channel by the described packet data signals that described lan port receives.

According to the 3rd aspect of the present invention, engineering orderwire instrument in a synchronous digital communications networks here is provided, described synchronous digital communications networks comprises a plurality of node devices and at least one chained device, described node device is adapted to pass through described chained device and intercoms mutually on operation and maintenance channel, and described instrument comprises:

A demultiplexer device, the packet data signals multichannel that is used for transmitting on the described operation of described communication network and maintenance channel is decomposed, and described demultiplexer comprises a lan port;

A fractionation group device, being used for the series of data packets conversion of signals is engineering orderwire data, wherein each data packet signals all comprises a data pay(useful) load signal and a protocol header signal; With

A data terminal installation can receive described engineering orderwire data-signal and can export engineering orderwire data corresponding to described engineering orderwire data-signal.

Comparatively preferably, described fractionation group device comprises: a processor; With a data storage medium, described data storage medium storage control signal, this control signal is operated described processor described packet signal sequence is converted to described engineering orderwire data-signal corresponding to described engineering orderwire data.

A described data terminal may comprise an equipment of selecting from following set; Personal computer; Laptop computer; Palmtop computer; Individual's organizer, special-purpose computer.

Comparatively preferably, described data multiplex decomposer operation multichannel is decomposed described grouped data, and submits described grouped data in described lan port.

The present invention includes a synchronous digital communications networks, this communication network comprises a plurality of node devices by a plurality of chained device links, first and second described node device can be at least one described chained device mutual communication, wherein provide at described first node device:

First multiplexed apparatus can communicate on operation of described network and maintenance channel;

First lan port can receive input engineering orderwire data-signal, and described first lan port and described first multiplexer of connection communicate;

First packet device is used to divide into groups to represent an engineering orderwire signal of engineering orderwire data, and connects to communicate by letter with described first lan port;

First data fractionation group device is used for the grouping engineering orderwire data-signal of the received expression engineering orderwire data of fractionation group; With

Provide at described second node device:

Second multiplexed apparatus can communicate on operation of described network and maintenance channel;

Second lan port can receive input engineering orderwire data-signal, connects described second lan port and described second multiplexer communicates;

Second data apparatus for grouping is used to divide into groups to represent an engineering orderwire signal of engineering orderwire data, and connects to communicate by letter with described second lan port;

One second data fractionation group device is used for the grouping engineering orderwire data-signal of the received expression engineering orderwire data of fractionation group;

Wherein, by described engineering orderwire data are input to a described apparatus for grouping, by a described apparatus for grouping described engineering orderwire data of dividing into groups, described engineering orderwire data are input to a described lan port, by a described multiplexer with described engineering orderwire data multiplex, between described first and second multiplexer, send described engineering orderwire data, export described engineering orderwire data by a described lan port, with organize described engineering orderwire data by the fractionation of a described fractionation group device, be implemented between first and second node device transmission engineering interconnection data mutually.

Comparatively preferably, described operation and maintenance channel comprise a synchronous digital hierarchy data communication channel, and this channel is to transmit in D2 at the byte D1 of a synchronous transfer module (STM) Frame.Described operation and maintenance channel may be at byte D1 to D3, D4 transmits in the D12.

The present invention includes a synchronous communication network that comprises a plurality of node devices that are linked by a plurality of chained devices, wherein;

First described node device comprises:

First the multiplexed apparatus that can visit operation and maintenance channel;

First lan port;

First interface is used for communicating between described first multiplexed apparatus and described first lan port; With

First terminal fitting that is connected with described first lan port; With

Second described node device comprises:

Second multiplexed apparatus can visiting operation and maintenance channel;

Second lan port;

Second interface is used for communicating between described second multiplexed apparatus and described second lan port; With

Second terminal fitting that is connected with described second lan port;

Wherein, described first terminal operating is by described first lan port, and described first interface and described first multiplexer are input to described operation and maintenance channel with the engineering orderwire data; Described first multiplexer sends to described multiplexer with described engineering orderwire data; Described second multiplexer outputs to described second lan port by described second interface with described engineering orderwire data; And described second terminal fitting receives described engineering orderwire data from described second lan port.

Description of drawings

For a better understanding of the present invention and explanation how to realize the present invention, below will be according to the present invention with reference to the accompanying drawings by example, specific execution mode, method and processing procedure are described, wherein:

Fig. 3 shows a synchronous digital communications network, and it comprises the communication loop configuration of a layering, and it uses specific instrument according to specific method operation of the present invention and according to the present invention;

Fig. 4 shows an example of the universal synchronous digital multiplexer/demultiplexer network components that comprises network among Fig. 3;

Fig. 5 shows another example of the universal synchronous digital multiplexer/demultiplexer network components that comprises network among Fig. 3;

Fig. 6 shows the layout of instrument according to the specific execution mode of the present invention, comprises first and second network components and first and second data terminal, is used for communicating at the network of Fig. 3;

Fig. 7 shows the architecture of a specific data terminal according to a specific implementations of the present invention;

Fig. 8 shows the feature summary of the data terminal among Fig. 7;

Fig. 9 shows the summary of the parts of the synchronous digital communications multiplexer/demultiplexer network components that comprises network among Fig. 3, and the network among Fig. 3 comprises the instrument in a kind of specific implementations of the present invention;

Figure 10 shows a frame of data-signal according to Synchronous Transfer Mode (STM) transmission means that is adopted in the network among Fig. 3;

Figure 11 is the detailed extention that shows the data frame signal among Figure 10 further;

Figure 12 shows a protocol stack, and this protocol stack comprises according to the present invention, is used for a kind of specific method that communicates on the communication network of Fig. 3;

Figure 13 shows according to ad hoc approach of the present invention, sends an example of project data method in the communication network of Fig. 3;

Figure 14 shows in the communication network of Fig. 3, according to ad hoc approach of the present invention, receives an example of project data and the method for handling the project data that receives;

Figure 15 shows an example of the part of a synchronous digital communications network, according to further ad hoc approach of the present invention, has realized between first and second synchronous digital network parts and communicating by letter on wide area network in this communication network;

Figure 16 shows data processing step, is used for a data terminal is connected with a network components and with engineering orderwire transfer of data to a synchronous digital communications networks.

Figure 17 shows and is used for connecting engineering orderwire data and the summary of selecting an example of being connected of route and routing protocol for these data at a synchronous digital communications networks;

Figure 18 shows the further example according to a synchronous digital communications network of further specific implementations of the present invention; With

Figure 19 shows the relation between American National Standards Institute's synchronous optical network data frame signal and the synchronous digital hierarchy synchronous transfer module data frame signal.

Embodiment

To describe the inventor by example now and realize desired optimal mode when of the present invention.A large amount of specific details is provided in the following description, and purpose provides comprehensively to be understood the present invention.But obviously,, need not these specific detail also can realize the present invention for person skilled in the art.The method and structure that does not have detailed description to be widely known by the people in the other example, purpose are to prevent to cause unnecessary the obscuring to the present invention.

Fig. 3 with reference to the accompanying drawings illustrates a synchronous telecommunications network, and it comprises a plurality of apparatus for network node (NE) that linked together by a plurality of digital communication link member equipment.By between network components, transmitting operation and the maintenance signal that network components uses in inside, the operation and the maintenance of one or more network controller 300 Control Network parts.On an operation and maintenance channel, send operation and maintenance signal.The network operation at a synchronous transfer module (STM) to carry out the transmission of data.Node device may comprise multiplexer, and they can be multiplexed as the signal of higher rate by the signal that speed is relatively low, and also may comprise relay equipment, are used for along the link amplifying signal.In network shown in Figure 3, first layer of node device 301,302 on the region each other at a distance of a very long segment distance, about 40 to 90 kilometers, and the optic communication links by long distance is connected in a loop configuration 303.The ground floor network components comprises a plurality of multiplexer instruments that are connected by optic communication links, provides a plurality of optical repeater equipment 302 between first layer multiplexer 302 that forms this annular.At the second layer of this network, a plurality of second layer multiplexers 304 are provided, they and ground floor multiplexer communicate.Second layer multiplexer is made amendment to the communication data from another synchronous transfer module (STM) ring of the 3rd layer of multiplexer 305 that links to each other (the 3rd layer of network), and with this data passes to ground floor multiplexer 301.May comprise for example the 3rd layer of multiplexer 305 of add-drop multiplexer, may have a remote interface, in order to connect a public switched telephone network (PSTN).What be connected with different node device is to have the application-specific computer of telephone receiver 306, personal computer 307, laptop computer, a plurality of data terminals of palmtop computer or individual organizer form at the 3rd layer of network.At the ground floor of network, one or more router threes 08 have been connected.Data terminal is connected with first node layer equipment 301 by one or more router threes 08.

Fig. 4 with reference to the accompanying drawings, first example of the node device before showing in the technology, this node device comprise definition in International Telecommunications Union's synchronous digital hierarchy (ITU-T SDH) proposed standard 1 a synchronous multiplexer/demultiplexer 400.Synchronous multiplexer 400 can receive the wide region supplied with digital signal from 1.5Mbit/s to 240 Mbit/s broadband bit rates.May import these input signals by electricity on the secondary surface 401 of equipment or optical interface.On the line scan pickup coil side 402 (being called synchronizable optical equipment in addition) of multiplexer, may send light signal with a plurality of different transmission frame speed corresponding to synchronous transfer module (STM), transmission rate is the SMT-1 of 155.52 Mbit/s, 622.08Mbit/S STM-4,2, the STM-16 of 488.32Mbit/s and the STM-64 of 9953.28Mbit/s.Like this, multiplexer 400 is input and output electricity and/or light signal on its satellite interface, and it is light signal together that electricity and light signal are multiplexed in, and sends this light signal along synchronizable optical equipment.

Here with reference to figure 5, represented another form of the multiplexer/demultiplexer 500 in the former technology, multiplexer/demultiplexer 500 may comprise a node device in Fig. 3 network here.Second multiplexer/demultiplexer 500 in the technology comprised the auxiliary I/O 501 of a cover in the past, and it operates on the data rate of 2Mbit/s by the remote interface of the equipment on the secondary surface; One circuit that is enclosed within on the secondary surface of equipment connects 503 and synchronizable optical equipment 504, and it comprises with STM-1, STM-4, and STM-16, the STM-64 data rate transmits the optical fiber of transmission channel.This optical fiber comprises the light device that is used for communicating link between node device.

Here in the best mode of Miao Shuing, a plurality of individuals can use a plurality of data terminals to intercom mutually, and data terminal can be connected with corresponding network components separately or disconnect and being connected, and also may be of portable form for the network data terminal.As following described, each data terminal all has a corresponding separately address, and with this Address Recognition data terminal, and the topological structure of address and network and layout have nothing to do.Use separately two or more engineering staffs of data terminal directly to link to each other to fetch and be implemented in channel engineering orderwire data by data terminal with them with the lan port of network components.In this manual, the term engineering orderwire is used for being described in the service at different node devices place in the network, the data of transmitting between engineering or the professional.According to the type of employed data terminal, may between data terminal, transmit for example voice signal, fax or Email signal, chart data, or the engineering orderwire data of low-resolution video data.Can introduce a new network components Anywhere in network, by data terminal is connected with new network components, data terminal can communicate with any one or a plurality of other data terminal that are connected with other network components in the network.

With reference to figure 6, show first and second node device 600,601 of network among Fig. 3 here respectively, they are connected with corresponding data terminal 602,603 separately respectively, and data terminal comprises a pocket personal computers in this example.Installing, going into operation and during maintaining network, the communication of project data need be undertaken by the professional who is positioned at first and second node device 600,601 place, with installation or maintaining network parts.The professional needs mutual communication, and purpose is to set up between first and second network components, and the connection between other network components of synchronizing network.First and second node device 600,601 may be positioned at the indoor of radio shielding environment, and this has just got rid of between first and second node device and uses radio communication, and they may be separated by on the region tens kilometers.According to best mode of the present invention as described herein, use and first and second node device 600,601 first and second data terminal 602 that are connected, 603, already present operation and maintenance channel provide Electricity Federation winding thread function in synchronous digital network 300 between node device.

Usually, such operation and maintenance channel are to be used for sending operation and service data into the interoperability of node device.In the described best mode, send project data here along operation and maintenance channel, and project data with along moving and the normal operation and the service data of maintenance channel transmission exist simultaneously.

Here with reference to figure 7, show a kind of execution mode of first data terminal 602.Can dispose second data terminal 603 equally.Data terminal 602 comprises a processor 700; A data memory 701; One operates in a general agreement, the input/output end port 702 on for example known Ethernet protocol or the known RS232 bus protocol; A visual display unit, a keyboard that is used to import data can be selected for example trackball device that is used to import data of an indication device, (not representing visual display unit among Fig. 7, keyboard and indication device); An audio port 704 is used to connect the receiver of phone, or passes through a microphone or loud speaker 705,706 provide audio communication, 707, one CD-Rom driving data of disc drive data memory device memory device 708, an analog to digital converter and a digital to analog converter.Keyboard, visual display unit, processor, memory and input/output end port all are according to known operating system, Windows 3.11 versions of Microsoft for example, in the operating system layer work of data terminal.Being stored in memory 701 or the disc driver 711 is control command set, and control command is configured to realize the grouping and the transmission algorithm of packet before output port 702 transmitting datas; Control command is configured to realize fractionation group algorithm, is used for splitting on input port 702 data that winding is received; Control command is configured to realize compression algorithm, is used for compression by keyboard, audio port 704 or by other input port, for example the disk drive terminal 702, and the signal of input, or compression is pre-stored in data-signal in the memory 701 before grouping; Control command is configured to realize decompression algorithm, is used for the signal that decompress(ion) obtains from fractionation group algorithm; Be used for analoging sound signal is converted to digital audio signal with control command, and be used for digital audio signal is converted to analoging sound signal.Compression, decompress(ion), grouping all is positioned at communicating by letter of data terminal and transport layer with fractionation group control signal.Digital-to-analogue and analog-to-digital conversion instruction may comprise the part of the operation layer of data terminal, maybe may be positioned at communication and transport layer.With the signal of telecommunication or electricity, the form of light or magnetic readable signal is stored in memory 701 or hard disk 707 with control command, or among the CD-Rom708.

With reference to figure 8, represented the data terminal of Fig. 6 and Fig. 7 here with the form of feature summary.Engineering orderwire data or be stored in the harddisk memory of data terminal, on floppy disk for example by a disc driver input, or by keyboard 800 inputs, or by 306 inputs of a telephone receiver.When with data terminal during as a transmitter, by compression algorithm of compression module 709 operations, for example the engineering orderwire data of general Groupe Systeme Mobile (GSM) compression algorithm compression input can access about 1 to 2Kbytes/s packed data speed.Passing through under the situation of telephone receiver 306 input audio datas, before compression module 709 compressed, digital to analog converter 802 was with the analoging sound signal digitlization.Directly will be from keyboard by compression module 709, hard disk drive, the data of floppy disk or other device input are compressed.Data after the compression are imported into grouping module 707, and this module is carried out open system interconnection OSI packet oriented protocol.Send grouping engineering orderwire data after the compression by output port 702, output port 702 is carried out a puppy parc, for example known Ethernet protocol or RS232C agreement.

When as a receiver, data terminal receives the data of dividing into groups by input port 702, and the grouped data that receives is offered fractionation pack module 708, the open system interconnection OSI packet signal of this module fractionation group input.Grouping and split pack module 707,708th, by the software that can use according to the known commercial that is stored on memory 701 or the disc driver 711 or known free shareware, operation processor 700 is realized.Split that pack module will fractionation group, but still the engineering orderwire data-signal that receives of compression sends to decompression module 710, decompression module according to known GSM decompress(ion) agreement with the engineering orderwire data decompression.Engineering orderwire data behind the decompress(ion) or under the situation of sound signal data, deliver to telephone receiver 306 by digital to analog converter 803, or at text, deliver to visual display unit 801 under the situation of Email or facsimile data, or directly deliver to the hard disk of data terminal.

Here with reference to figure 9, show the parts in the synchronous digital communications multiplexer/demultiplexer network components, these parts can be according to the operation of synchronous digital hierarchy (SDH) agreement, and wherein the synchronous digital hierarchy agreement comprises synchronous optical network (SONET) agreement.Network components comprises first and second light transmission path 900,901, is used for transmitting fiber-optic signal with the data rate of STM or SONET; Multiplexer/demultiplexer and CD drive 902, it is connected light transmission path 900,901 with many 2Mbit/s electricity or the auxiliary transmission path of light.Multiplexer/demultiplexer is connected with a data communication channel (DCC) 903 that transmits in STM or sonet data frame signal with CD drive 902.The DCC driver can be to the data communication channel output signal of a multiplex signal, or from the data communication channel input signal of a multiplex signal, this signal is transmitted by multiplexer/demultiplexer and CD drive unit 902.Now will be according to specific method, the operation of data of description terminal and network components and the foundation processing that best mode of the present invention carried out.

Here with reference to Figure 10,, represented a frame of data according to known synchronous transfer module (STM) data frame signal.Figure 10 shows this frame, and this frame comprises a digital signal set by the data byte arrangement physically.The STM frame structure comprises a data pay(useful) load part 1000, transmit communication data therein, an extention 1001, transmit the route of relevant frame, error performance monitors, long-range error indication, the remote failure indication, the signal mark of the pay(useful) load that indication effectively connects, remote defect indicator and frame transmission and operation and needed other internal affairs process information of maintaining network parts.A STM-1 frame can be considered to the structure of one 270 row * 9 row, the wherein delegation of each row representative data byte.Extention 1001 comprises the regenerative repeater extention 1002 of 27 bytes and the multiplexed extention 1003 of one 45 byte.First row R1 of frame comprises the extention of one 9 byte, and the back is the data pay(useful) load signal of 261 bytes.In order to transmit and to receive, according to from left to right, call over the frame shown in Figure 10 from top to bottom by transmitter or multiplexer instrument.So at first send row 1, it comprises the additional header part of one 9 byte, and the back is the pay(useful) load of 261 bytes, row 1 back is row 2 and then, row 2 also comprise the additional header part of one 9 byte, and the back is the pay(useful) load of 261 bytes and then, are listed as up to whole 9 of frame all to be sent out.Data pay(useful) load district comprises 2,349 bytes, and the extention zone comprises 72 bytes.A protocol header that adds in addition, AU pointer area comprise 9 bytes.

Here with reference to Figure 11, the more detailed extention that shows the STM-1 frame shown in Figure 10.In the extention byte, represented here byte E1, E2 are specific bytes in the ITU-T proposed standard in the former technology, are used to transmit the described interconnection data of front background parts of the present invention.G.784, the proposed standard of the ITU-T in the January, 1994 in the former technology of foundation distributes byte D1 and D2 as a data communication channel (DCC) that is used to transmit operation and service data, is used for the internal configurations and the maintenance of network components.Byte D1 and D3 provide the channel of a 192kbit/s, and byte D4 provides the channel of one 576 kbit/s to D12.In the regenerative repeater extention, all synchronous digital hierarchy network parts can access bytes D1 to D3, and in the multiplexer extention, byte D4 is not the part of regenerative repeater extention to D12, regenerative repeater cannot be visited them.Byte D1 is distributed to network components to D3 use, yet byte D4 can be comprised telecommunication network management function that asynchronous digit sequence use as a wide area General Purpose Communication Channel with support to D12.G.784 the management function of being predicted in the ITU-T proposed standard is contemplated to the use of data communication channel (DCC) control channel (ECC) of an embedding, be used for from a concentrated network controller, for example the controller among Fig. 3 here carries out the remote maintenance and the operation of network components.General is, so concentrated network controller 300 may comprise a work station, for example one based on the work station of UNIX as a Hewlett Packard 9000 serial work stations, can download network management information with the parts in the Control Network parts.Like this, according to known ITU-T G784 agreement, be intended to come down to be used for the data of network components internal operation by the data that the control channel that embeds sends.Like this, send, and the terminal use of the data that physically transmit on data communication channel is predefined for intrinsic facility in the network components by ITU-T proposed standard G784 by the control channel that embeds.

According to best here mode, be in D12, to send the engineering orderwire data, and these data might exist simultaneously with operation that on this channel, sends and service data at the byte D1 of the extention of STM frame.

Again with reference to figure 9, provide a paths in the described best mode here, be used for by DCC driver 903, interface 904 and at the i.e. lan port 905 that provides of Ethernet or RS232C port connector of an outside out connector, the control channel of visit data communication channel and embedding.Data terminal may be visited the control channel that light embeds by the lan port electricity of a network components like this, and this control channel is distributed in the whole network.Therefore when setting up new network components, when only light connects in position in the best mode here, engineering and technical staff can be by optical-fiber network by data terminals, Ethernet or RS232 lan port connector, electronics connect to send data, and special instrument need not be exchanged to the network components of new installation.The known E1 that was advised in the technology relatively, E2 interconnection channel, they kept light and can not network components be not equipped with effect additional switching equipment and by electronic access.

Visit to the embedding control channel that transmits to the D2 at the byte D1 of data communication channel is to be carried out according to the described ISO agreement of reference Figure 12 by sound that is divided into grouping or other engineering orderwire data by data terminal.On a LAN data link, send the low byte rate audio in operation ISO 8802-2/8802-3 agreement, before data text or other input or that generate by first data terminal, according to ISO host-host protocol 8072,8074,8602 and procotol ISO 8348, ISO8473 and ISO 9542 be these packets, and they are input to the lan port 905 of first node device 600.In network components inside, to be compressed, grouping and the engineering orderwire data that are sent to network components by the form with the signal of telecommunication are converted to the STM or the sonet frame signal of an optical multiplexing by interface 904 and DCC driver 903, so that it is sent to second node device 601 at light set 900,901 glazings.Although the light data channel has had enough bandwidth to be used for transmitting normal voice signal with 64kbit/s, or low data rate text or figure, be to be used between network components, transmitting operation and service data but in DCC, transmit the initial purpose that embeds control channel.Thereby, on the major function for the embedding control channel that is presented at an operational network of the conflict that the engineering orderwire data are the least possible, by packed data before entering data communication channel, the ratio of the bandwidth that the engineering orderwire data are occupied reduces as much as possible.By receiving the engineering orderwire data from data communication channel at the outlet decompress(ion).The GSM compression algorithm provides enough compressions in the best mode that can find here according to testing.

But, in the new place of installing or not moving fully of communication network, there is no need compression and decompress(ion) are applied to all types of engineering orderwire data, because operation of passing through on DCC and service data may less or not exist, and DCC can transmit the voice data of unpressed 64Kbit/s.In the place that requires to send video data, just be necessary to carry out data compression.

Receiving network components, promptly second node device 601 receives and transmits the optical multiplexing STM frame signal that embeds control channel, and will be separated with the STM frame embedding the information that transmit on the control channel by second DCC driver 903 of second node device.Second lan port 905 interfaces of the data that comprised on the data communication channel and second network components 601 provide a signal of telecommunication in order to second lan port at second node device 601.This project interconnection data are present in second lan port of second node device 601, and operation LAN data link protocol ISO8802-2/8802-3, procotol ISO8348, ISO8473 and ISO9542, with host-host protocol ISO8072/8703/8602, these data are input to second data terminal 603, and the result obtains the fractionation group at second data terminal 603, decompress(ion) engineering orderwire data.

Provide a kind of method of visiting the optical channel between first and second network components by lan port and interface accessing data communication channel, the effective auxiliary instrumentation that is connected with this network components then can not be visited this channel else if.In addition, because osi protocol itself can carry out Path selection, the data terminal that is provided is located at the visible position of network controller in the network, so data terminal can use osi protocol to intercom mutually, and irrelevant with the topological structure of network.

Here with reference to Figure 13 and Figure 14, will describe now a kind of on synchronous digital communications networks, the method for transmission engineering interconnection data between first and second data terminal.For a data terminal that sends the engineering orderwire data, first data terminal for example, in step 1300, a user is data, voice data for example, text, figures etc. are input to data terminal.Have in data terminal under the situation of a telephone receiver, this step may comprise facing to receiver speaks, or at people's computer one by one, under the situation of laptop computer or individual organizer, this step may comprise data by a keyboard entry.In step 1301, the user imports his desired the reception data terminal of communication, the i.e. address of second data terminal with it.In step 1302, according to the GSM compression algorithm, send data terminal compression engineering orderwire data in the best mode here.In step 1303, the data after will dividing into groups are input to before the lan port of the network components that links to each other with first data terminal, and promptly before the step 1304, data terminal is divided into groups to the engineering orderwire data.In step 1305, network components receives the grouping engineering orderwire datagram number of compression, and with these signals and data communication channel driver 903 interfaces.The data communication channel driver enters data in the data communication channel of the optical multiplexer that is sent by CD drive and multiplexer 902.In step 1306, under the situation of a synchronous digital system network, multiplexer and CD drive 902 send light STM or the sonet data frame that comprises data communication channel at byte D1 in D12.

Here with reference to Figure 14, in step 1400, a network components that is connected with second data terminal receives STM or sonet frame signal on synchronizable optical equipment, in step 1401, that this signal is multiplexed with the restore data communication channel.The DCC driver that receives network components is delivered to the lan port that receives network components at the interface 904 of step 1402 by the reception network components with an output signal corresponding to the control channel that embeds.Receive the data that network components is converted to the data communication channel light signal that receives electrical signal form, lan port 905 at this reception network components can be visited these signals, like this in step 1402, receive the local area network (LAN) of network components at this, the signal that output is transmitted by data communication channel.Second data terminal receives this signal from the lan port that receives network components, and in step 1403 with this signal fractionation group to recover the engineering orderwire data-signal of compression.In step 1404 and 1405, data terminal is used the engineering orderwire data of decompress(ion) to recover to send.In step 1406, data terminal shows this project data, or makes and can obtain these data, for example makes it become a voice signal, or storage this project data.

Arrive Figure 17 referring now to Figure 15, an a kind of example of ad hoc approach is described according to the present invention, wherein first and second data terminal are positioned at a synchronous digital communications networks, and are sent in the information that is transmitted in the control channel that embeds through certain paths between first and second data terminal.Here with reference to Figure 15, illustrate the part of synchronous digital communications networks here, wherein first data terminal 1500 is by a router one 502, and for example the router of the former technology of CISCO production is connected with a synchronous digital communications wide area network 1501.What be separated with first router one 502 on the region on the wide area network is second router one 503, and it has a local area network (LAN) and connects 1504.Second router one 503 and synchronous digital system network parts 1505 communicate, and 1505 of network componentses communicate by an optical link 1507 and another synchronous digital system network parts 1506 on synchronous digital network.The 3rd and the 4th data terminal 1508,1509 are connected with another network components 1506 with local area network (LAN) 1504 respectively.All network componentses and router are all supported International Organization for Standardization OSI(Open Systems Interconnection) agreement.According to osi protocol, data terminal can be called as end system (ES), and network components for example router and multiplexer is called as intermediate system (IS).

Here with reference to Figure 16, in step 1600, in case the lan port of the network components in any place in first data terminal 1500 and the synchronizing network is connected, for example be connected with router one 502, according to first data terminal of join algorithm operation, repeat and regular on local area network (LAN) to the network components declaration that is connected with it it oneself.Specified a unique coding for first router one 502 among Figure 15, the form that will encode on local area network (LAN) with electric digital data signal offers network components.

The coding that first data terminal provided has following form:

00-08-C8 88-06-71

The unique coding of manufacturer

This coding comprises one 12 hexadecimal digit sequence, the type of first 6 specific data terminal installations wherein, the i.e. manufacturer of data terminal parts, the sequence number of second 6 specific data terminal.In step 1601, first data terminal uses known end system to declare it oneself to intermediate system (ES-IS) agreement to its local area network (LAN).Regular may the taking place once in for example per 30 seconds to 90 seconds of point-to-point system with declaration automatically.With reference to Figure 17, first data terminal 1700 is specified an end system, is used for communication, and network components 1701 to 1703 each all specified the intermediate system (IS) of representation of concept in Figure 17.Communication (ES-IS communication) between an end system and intermediate system is to use known agreement ISO/IEC9542 to carry out, and the wherein communication between intermediate system (IS-IS communication) is to use known agreement ISO10589 to carry out.In step 1602, network components uses known Intermediate System-to-Intermediate System (IS-IS) agreement ISO 10589, the recognition coding of first data terminal is propagated into other intermediate system at whole network.Each network components all has a fixing geographical position, and network controller is band of position coding of each network components storage.When a local area network (LAN) of a data terminal and network components partly was connected, location address was added on the code of this data terminal of identification like this.Propagate this information by data terminal in whole network, other each network components all receives the information that first data terminal is connected with other network components in certain location like this.The coding of propagating in whole network can be expressed as:

490000 00-80-C8 88-06-71

Area code manufacturer's unique coding of encoding

First 6 area codes of representing the network components under first data terminal wherein.Network componentses all in the ring of light all receive this information.When having only first data terminal to receive the information of relevant network components under it, all have position and unique information encoded about all independent data terminals that are connected with network by the all-network parts of network control management.Equally, each all carries out the operation of an equivalence be connected with other network components respectively in other position second and the 3rd data terminal 1507,1508, to their unique code of corresponding network parts declaration that is connected with them.Each corresponding network components other all network components in network sends the position of the corresponding data terminal that is connected separately with them and the signal of data terminal identification.The same with first data terminal, second with the 3rd data terminal only receive with they under the relevant information of network components, wherein each network components all receives the corresponding network position component information under all data terminals and their.Intermediate system has the message of all end systems like this.A hope and second and/or the 3rd first data terminal user that the data terminal communicates key in him or she at the keyboard of his or her data terminal and think the pairing data terminal recognition coding of each data terminal of communicating by letter with it.Network components with positional information of the network components that is connected with those data terminals may use Intermediate System to Intermediate System ISO 10589 to set the path that communicates with the corresponding network parts then.Send the grouped data that data terminal generates compression, the result is connectionless network layer protocol (CLNP) grouping, and these groupings are submitted to and the local area network (LAN) that sends the network components that data terminal is connected.Measure the CLNP grouping with sending the network components that data terminal (intermediate system) is connected, and use optimal path to forward the packet to its destination, promptly with second network components that is connected with the 3rd data terminal in step 1605.The structure of CLNP grouping is corresponding to the host-host protocol among Figure 12.CLNP grouping is forwarded to intermediate system from middle system by synchronous digital communications networks, specified purpose network components in the geocoding of the data terminal of keying in first data terminal that has addressed.This network components operates in intermediate system on the basis of a storage and forwarding, be used for sending the CLNP grouping at network, and the use Intermediate System to Intermediate System communicates the optimal path with definite STM of transmission or sonet frame signal between they are own, and transmits the engineering orderwire data in the data communication channel of whole network.An advantage using the IES agreement to be had as engineering orderwire data setting path in whole system is if any link or network components break down, intermediate system can self-recovery to end system (IS-ES) agreement, the IS-ES agreement will dispose transmission, for example send STM or sonet frame signal by another the different path in the network, cause a tough and tensile device like this, be used to send the engineering orderwire data with the data communication channel form.In step 1606, receive the network components multichannel decomposition data communication channel of CLNP grouping, and on the lan port of this network components the data-signal after the fractionation group be delivered to data terminal, this as in the above with reference to Figure 10 to Figure 15 described.

With reference to Figure 18, here show another specific execution mode, synchronous digital communications networks comprises a local network hub 1800 and is attached thereto the router one 801 that connects in first zone, in second zone, comprise first synchronous digital communications ring 1802, its operation synchronous driving mode STM-16 data frame signal, and in the 3rd zone, comprise second synchronous digital transmission ring, its operation STM-4 data frame signal.Each network components all has an address 49+0000.At first, the router one 801,1804,1805 in second and the 3rd zone also has a unique regional address respectively except that their address 49+0000.For example first router one 801 has an address

49+0000?39826+21200001

Second router one 804 has an address

49+0000?39826+21200002

The 3rd router one 805 has an address

49+0000?39826+21200003

In first zone, the data terminal 1806 that is connected with first router one 801 by local network hub 1800 and OSI local area network (LAN) link 1807 is with the engineering orderwire packet, this project interconnection data send from first data terminal, by router one 801 according to address setting that the user keyed in it to the path of second and the 3rd router one 804,1805.In first and second annular with separately network components 1810,1811 first and second telephone receiver 1808 that comprise the end-point data terminal that are connected, 1809 data communication channels (control channel of embedding) that are received in network are gone up grouping operation and the maintenance channel signal that transmits, and by them and network components 1810, the performance of 1811 connection, be second and the 3rd phone 1808 separately, 1809 set and second and the 3rd route that router one 804,1805 connects.In this example, a plurality of network componentses have a general regional address, and the regional address in second zone is

39826+210000

Trizonal regional address is

39826+2100003

With reference in the described best mode of STM-1 frame, in other specific implementations and specific method, visit the data communication channel of sonet frame signal by a lan port of network components here according to the present invention.Here with reference to Figure 19, a SONET STS-1 frame and a SDH STM-1 frame have been compared.At SONET STS-1 frame, provide the extention of 3 bytes of STS-1 frame.Three STS-1 sonet frames are multiplexed as a STS-3 frame, comprise one 3 * 3 additional part of row.3 * 3 row extentions comprise the data communication channel byte, may the mode identical with STM-l frame described above send these bytes on synchronous digital network.The sonet protocol head transmits a data communication channel in a fiber frame signal, can visit this channel at a node device place with best mode as described herein.A SDH network is an arbitrary mess of SDH network of network parts.This network may be connected with other SDH network (not shown) by the router of supporting osi protocol.In the time of one in needs change or the technical maintenance parts, it is visited by an operator, and this visitor may carry the laptop computer that a RS232 port that can be connected with this network components and a LAN port are provided.Normally use laptop computer requester network parts by the RS232 port, purpose is for example to investigate the stock.

Software four layers with osi protocol bottom represented among realization Figure 12 are provided in the laptop computer data terminal.This makes it possible to by network layer, and lan data link layer and LAN port physical layer receive data to the transport layer input or from transport layer.The LAN port that connects laptop computer makes it possible to communicate with the laptop computer that is connected with other suitably the installation on network.Owing to be the laptop computer of discerning other by its OSI address on the OSI digital communications network, therefore which not relation it is positioned at physically in network.

For this laptop computer provides device with the audio signal of phonetic transcription for output, and the audio signal that receives is transcribed into sound.May be for this laptop computer provide a built-in microphone and loud speaker, or receiver.On four layers of the bottom of osi protocol stack, the general arrangement that hardware and software is provided to be being converted to data with output audio signal, and data are converted to the audio signal that receives.Output audio signal is converted into packet with in transmission over networks.The packet that receives on network is converted into audio signal, and is transcribed into sound.

In some applications, use a laptop computer requester network parts possibility and unsatisfactory.For this or other reason, preferably provide the voice communication that is independent of a laptop computer.In such a case, the realization of this instrument may be to adopt to comprise a microphone that is used for the numeric keypad of Input Address information, the arrangement of a kind of general hardware and software is converted to data with output audio signal, and data are converted to the audio signal that receives, hardware and software provides four layers of osi protocol bottom, with a LAN port that is used to be connected network components.

List of references

[1] ITU-T of International Telecommunications Union proposed standard G.70X, referring to ITU Sales andMarketing Service, Place de Nations, CH1211 Geneva 20, Switzerland, e-mail address:

Sales@itu.com

[2] T1 of American National Standards Institute * 1 committee, New YorkHeadquarters, 13 ^ThFloor, 11 West 42 ^NdStreet, New York, NY10036, USA..

Abbreviation

ANSI ANSI

The CLPN connectionless network layer protocol

The DCC data communication channel

ECC embedded Control channel

The EOW engineering orderwire

The ES-IS end system is to intermediate system

GSM moves grouping system

The IS intermediate system

The IS-ES intermediate system is to end system

The IS-IS Intermediate System-to-Intermediate System

The NE of ITU International Telecommunications Union of ISO International Standards Organization network components OSI open system interconnection PDH PDH POTS plain-old telephone system PSTN public switched telephone network SDH Synchronous Digital Hierarchy SONET synchronous optical network STM synchronous driving mode VDU visual display unit

Claims (23)

1. method, be used for transmission engineering interconnection data between first and second node device of a synchronous digital communications networks, this network comprises a plurality of node devices (301 by a plurality of chained device links, 304,305), described communication network has an operation and maintenance channel, is used for transmitting operation and maintenance information between described node device, and described method feature is to comprise step:

By the lan port of described first node device, the engineering orderwire data-signal is input to described first node device;

On described operation and maintenance channel, described engineering orderwire data are sent (1306) to described second node device; With

On described operation and maintenance channel, receive (1400) described engineering orderwire data at described second node device;

Lan port output (1402) described engineering contact data from described second node device.

2. the method described in the claim 1 is characterised in that also to comprise step:

With described engineering orderwire packet (1303) is a series of packet data signals, each signal all comprises a data pay(useful) load signal and a packet oriented protocol additional signal, wherein respectively from described first and second described packet signal of node device input and output.

3. the method described in the claim 2 is characterised in that described packet oriented protocol head comprises an address signal, is used to specify an address that receives data terminal that is connected with described node device.

4. the method described in the claim 2 or 3 is characterised in that to comprise step:

According to an agreement that does not require the grouping confirmation of receipt, with described engineering orderwire packet.

5. any one described method among the claim 1-3 is characterised in that to comprise according to an OSI(Open Systems Interconnection) protocol method the described input engineering orderwire data of dividing into groups.

6. any one described method among the claim 1-3 is characterised in that the step that also comprises the described engineering orderwire data of compression (1302).

7. the method described in the claim 6 is characterised in that described compression step, comprises according to a GSM data compression algorithm compressing described engineering orderwire data.

8. the described method of claim 6 is characterised in that the step that comprises the described engineering orderwire data of decompress(ion) (1404).

9. any one described method among the claim 1-3 is characterized in that described communication network comprises a SDH (Synchronous Digital Hierarchy) (SDH) network.

10. the method described in the claim 9, be characterised in that described operation and maintenance channel comprise International Telecommunications Union the proposed standard in January, 1994 G.784 in of appointment embed control channel.

11. any one described method in the claim 1 to 3 is characterized in that described communication network comprises ANSI's Synchronous Optical Network (SONET) network.

12. any one described method in the claim 1 to 3 is characterised in that described operation and maintenance channel comprise a SDH (Synchronous Digital Hierarchy) data communication channel that transmits in the D12 at the byte D1 of synchronous driving mode (STM) Frame.

13. the engineering orderwire instrument in the synchronous digital communications networks, this synchronous digital communications networks comprises a plurality of node devices (301,302,304,305) and at least one chained device, described node device is suitable for intercoming mutually by described chained device on an operation and maintenance channel, and described instrument is characterised in that and comprises:

Data terminal unit (306) is used to generate the engineering orderwire data-signal;

The packet device is used for described engineering orderwire data-signal is converted to the series of data packets signal; With

A multiplexed apparatus (902) is used for described grouped data is multiplexed to the described operation and the maintenance channel of described communication network, and described multiplexed apparatus comprises a lan port.

14. the engineering orderwire instrument described in the claim 13 is characterised in that a described data terminal comprises an equipment of selecting from following set:

Personal computer;

Laptop computer;

Palmtop computer;

Individual's organizer;

Special-purpose computer.

15. the engineering orderwire instrument described in the claim 13 is characterised in that described apparatus for grouping comprises:

A processor (700); With

A data storage medium (701,711,712),

The data storage medium of described storage control signal is used to operate described processor, is described packet series with described engineering orderwire conversion of signals.

16. the engineering orderwire instrument described in the claim 13, it is characterized in that described multiplexer can receive data-signal, and operation will be multiplexed to described operation and maintenance channel by the described packet data signals that described lan port receives.

17. the engineering orderwire instrument in the synchronous digital network, this synchronous digital network comprises a plurality of node devices (301,302,304,305) and at least one chained device, described node device is suitable on an operation and maintenance channel by described chained device mutual communication, and described instrument is characterised in that and comprises:

A demultiplexer device (902), the packet data signals multichannel that is used for transmitting on the described operation of described communication network and maintenance channel is decomposed, and described multichannel decomposer comprises a lan port;

A fractionation group device (708), being used for the series of data packets conversion of signals is engineering orderwire data, wherein each data packet signals all comprises a data pay(useful) load signal and a protocol header signal; With

A data terminal installation can receive described engineering orderwire data-signal, and can export the engineering orderwire data corresponding to described engineering orderwire data-signal.

18. the engineering orderwire instrument described in the claim 17 is characterised in that described fractionation group device comprises:

A processor (700); With

A data storage medium (701,711,712),

The data storage medium of described storage control signal is used to operate described processor, and described packet signal series is converted to described engineering orderwire data-signal corresponding to described engineering orderwire data.

19. the engineering orderwire instrument described in the claim 17 is characterised in that a described data terminal comprises an equipment of selecting from following set:

Personal computer;

Laptop computer;

Palmtop computer;

Individual's organizer;

Special-purpose computer.

20. the engineering orderwire instrument described in the claim 17, wherein said demultiplexer multichannel is decomposed described grouped data, and submits described grouped data in described lan port.

21. one comprises a plurality of node devices (301 by a plurality of chained device links, 302,304,305) synchronous digital communications networks, first and second described node device can be on some at least described chained devices mutual communication, being characterised in that at described first node device provides:

First multiplexed apparatus (902) can communicate on operation of described network and maintenance channel;

First lan port (905) can receive input engineering orderwire data-signal, the communication that is connected with described first multiplexer of described first lan port;

First packet device (707) is used to divide into groups to represent an engineering orderwire signal of engineering orderwire data, and connection and described first lan port communicate;

First data fractionation group device (708) is used to split the engineering orderwire data of the expression engineering orderwire packet that winding receives; With

Provide at described second node device:

Second multiplexed apparatus can communicate on operation of described network and maintenance channel;

Second lan port can receive input engineering orderwire data-signal, connects described first lan port and described second multiplexer communicates;

Second data apparatus for grouping is used to divide into groups to represent an engineering orderwire signal of engineering orderwire data, and connection and described first lan port communicate;

One second data fractionation group device is used to split the engineering orderwire data of the expression engineering orderwire packet that winding receives; The described data fractionation group device and described second lan port that link to each other communicate;

Wherein, described first and second node device be transmission engineering interconnection data mutually by described engineering orderwire data are input to a described apparatus for grouping, by a described packet equipment described engineering orderwire data of dividing into groups, described engineering orderwire data are input to a described lan port, by a described multiplexer with described engineering orderwire data multiplex, between described first and second multiplexer, send described engineering orderwire data, export described engineering orderwire data by a described lan port, and organize described engineering orderwire data by the fractionation of a described fractionation group device.

22. the communication network described in the claim 21 is characterised in that described operation and maintenance channel comprise a SDH (Synchronous Digital Hierarchy) data communication channel that transmits in the D12 at the byte D1 of Synchronous Transfer Mode (STM) Frame.

23. a synchronous digital communications networks comprises a plurality of node devices (301,302,304,305) that linked by a plurality of chained device, is characterised in that:

A described node device comprises:

First the multiplexed apparatus (902) that can visit an operation and maintenance channel;

First lan port (905);

First interface (904) is used for communicating between described first multiplexed apparatus and described first lan port; With

First terminal fitting that is connected with described first lan port; With

Second described node device comprises:

Second multiplexed apparatus can visiting described operation and maintenance channel;

Second lan port;

Second interface is used for communicating between described second multiplexed apparatus and described second lan port; With

Second terminal fitting that is connected with described second lan port;

Wherein, first shown terminal is input to described operation and maintenance channel by described first lan port, described first interface and described first multiplexer with described engineering orderwire data; Described first multiplexer sends to described second multiplexer with described engineering orderwire data; Described second multiplexer outputs to described lan port by described second interface with described engineering orderwire data; Described second terminal fitting receives described engineering orderwire data from described second lan port.

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