CN101106430A - Optical access system of protocol converter - Google Patents
Optical access system of protocol converter Download PDFInfo
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- CN101106430A CN101106430A CN 200610028796 CN200610028796A CN101106430A CN 101106430 A CN101106430 A CN 101106430A CN 200610028796 CN200610028796 CN 200610028796 CN 200610028796 A CN200610028796 A CN 200610028796A CN 101106430 A CN101106430 A CN 101106430A
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Abstract
A protocol converter fiber access system comprises a local end centralized frame, a remote end independent box and a G703/V35 protocol converter arranged in the local end centralized frame and the remote end independent box; the G703/V35 protocol converter comprises, in sequential circuit connection, a Complex Programmable Logic Device, a photo-electric conversion circuit, a network management single chip microcomputer, and a timeslot setting control circuit, and also comprises a V35 interface circuit and an E1 interface circuit connected by circuit respectively with the photo-electric conversion circuit and the Complex Programmable Logic Device. The protocol converter fiber access system provided in the invention can convert the V35 interface to the E1 (European standard of data transmission) interface and expand the transmission distance and the application range of the V35 interface via E1.
Description
Technical field
The present invention relates to a kind of optical access system of protocol converter, especially relate to a kind of G.703/V35 protocol converter that is applied in the multi-service Fiber Access System, wherein, G.703 the physical electrical characteristic standard of representing digital interface, V35 represents a kind of high-speed synchronous data exchange standard of International Telecommunications Union's definition.
Background technology
Because the transition of communication network force the network operator to face great challenge at present, professional development no longer is confined to simply provide telephone service, and it faces following problem at least:
1, long-distance user's access.Along with the vast development of rural economy of China, some press for communication service away from the rural area, urban.The communication network network operator wishes to provide professional for the long-distance user under the prerequisite of not investing the increase telephone net node.
2, concentrate user's access.Along with the fast development in city, newly-built office building, hotel, residential quarters get more and more.These regional characteristics are that the user concentrates, and are urgent to the demand of various telecommunication services.Lay the copper cable investment simultaneously in these zones big, long in time limit.The network operator wishes and can provide professional cheaply fast.
3, the access of integrated service.Terminal use's business demand is different, and is more and more to the demand of new business such as data and image.The network operator wishes to provide speech, data and graphic service by unified system synthesis, avoids overlapping construction.
4, the optimization of network.In order to reduce the cost of operation maintenance, the planning trend of present whole communication network is to reduce local switch node number to provide the source node number with other miscellaneous services, enlarges the capacity and the service radius of each node.Simultaneously existing network is also made great efforts to be optimized, and so-called " Ruling out separate offices and interconnecting them within a network ".
Because the demand of variety classes information is more and more, multiple new business demands such as incident ever-increasing IP data, speech, multi-media image, impelled the transmission network environment of each macroreticular operator that earth-shaking variation has taken place, those were that main purpose tradition metropolitan area network and Access Network all can't satisfy diversified new business transmission and the requirement of handling on capacity and kind of interface with the carrying simulated voice in the past.
Each tame operator constantly strengthens communication service capabilities after listing, make great efforts to improve the service operation maintenance levels.At large-scale enterprises and institutions, carry out stable private line service based on Time Division Multiplexing/Digital Data Net (DDN)/asynchronous transfer mode (ATM) all the time, interface G.703/V35 is provided.Along with opening gradually of telecommunication market, startup carrier is constantly initiated challenge with the new technology based on optical fiber, and traditional private line service is subjected to increasing competitive pressure.Traditional Ethernet 10/100BaseT only supports 100 meters distance, and part is non-standard can support 200 meters, can not satisfy the requirement of long Distance Transmission far away.
At present, light cat series, converter series, fiber optical transceiver series and PDH (Pseudo-synchronous Digital Hierarchy) (PDH series) equipment is that the data that each big operator generally adopts insert and transmission means, low, the less investment of this mode networking cost, and there is multiple mode available, such as: 2M, V35,10/100M Ethernet, 100M optical Ethernet etc., access via telephone line, the big customer who has satisfied the operator inserts, the Internet bar inserts, the access and the transmission that have solved data and voice are inserted or the like in the sub-district.But satisfy the access and the transmission of multiple business, above-mentioned serial equipment is installed respectively, be not easy to administering and maintaining of network operator, also make troubles for the expansion of follow-up business.
Data communications equipment such as router are mainly used the Leased line business of V35 interface bearing N * 64Kbps, are the main flows that narrow band data inserts all the time.But dispose this type of scheme, must control (DXC) resource near synchronous digital hierarchy (SDH)/asynchronous transfer mode (ATM) or data cross, otherwise will utilize high-bit-rate digital subscriber line (HDSL) and telephone wire to extend.And Digital Subscriber Line (DSL) and telephone wire are subjected to crosstalking in high-speed transfer easily and the line quality influence.
Summary of the invention
The object of the present invention is to provide a kind of optical access system of protocol converter, it can expand the transmission range and the range of application of V35 interface with the V35 interface conversion to E1 (European standard of transfer of data) interface by E1.
For achieving the above object, the invention provides a kind of optical access system of protocol converter, it comprises the centralized frame of local side, far-end stand alone type machine box and is installed in the centralized frame of described local side and the interior G.703/V35 protocol converter of far-end stand alone type machine box;
Be provided with webmaster dish and some interfaces in the centralized frame of described local side; This interface is V35 interface and E1 interface;
Be provided with some interfaces in the described far-end stand alone type machine box; This interface is V35 interface and E1 interface:
Described G.703/V35 protocol converter comprises the CPLD (CPLD), photoelectric switching circuit, webmaster single-chip microcomputer and the time slot that connect by circuit successively control circuit is set;
Described G.703/V35 protocol converter also comprises the V35 interface circuit that circuit respectively connects described photoelectric switching circuit and CPLD, and this V35 interface circuit connects the V35 interface in centralized frame of described local side and the far-end stand alone type machine box;
The V35 interface circuit that described V35 interface circuit is N * 64K, it finishes the level conversion of various clocks, data and control signal;
Described G.703/V35 protocol converter also comprises the E1 interface circuit that circuit respectively connects described photoelectric switching circuit and CPLD, and this E1 interface circuit connects the E1 interface in centralized frame of described local side and the far-end stand alone type machine box;
Comprise several logical blocks (LEs) among the described CPLD,, improve the reliability of photoelectric switching circuit under operational environments such as high low temperature handling by the E1 input signal of E1 interface circuit generation with by N * 64K input signal that the V35 interface circuit generates;
Described CPLD also links to each other with the configuration bus (PS-BUS) of photoelectric switching circuit, solves signals such as equipment work pattern and clock setting selection;
N * 64K input signal that described V35 interface circuit generates is sent into CPLD and is handled, and transfers to photoelectric switching circuit again; And, be delivered directly to the V35 interface circuit by the signal that photoelectric switching circuit is exported;
The signal of described E1 interface circuit carries out the list/pair conversion of HDB3 sign indicating number by transformation, generates the E1 input signal of unipolar code, sends into CPLD and handles, and transfer to photoelectric switching circuit again; And after the unipolar code process list/pair conversion by photoelectric switching circuit output, be delivered directly to the E1 interface circuit;
Described photoelectric switching circuit comprises the E1 interface module that circuit connects, N * 64K interface module, microprocessor (MP) interface module;
Described E1 interface module comprises E1 interface input module and the E1 interface output module that circuit connects; This E1 interface input module carries out clock recovery, HDB3 decoding and corresponding state-detection with the E1 signal of outside, when detected sign indicating number type is NRZ NRZ, shows that alarm detection is invalid; This E1 interface output module major function is to carry out high-density bipolar code (HDB3 sign indicating number) coding;
The E1 that described E1 interface module also comprises the circuit connection becomes frame module and E1 to separate frame module; This E1 becomes frame module mainly to finish the function that signaling, synchronization character, expense is aggregated into frame structure; This E1 separate frame module finish prime frame synchronously, the multi-frame and the signaling multi-frame synchronizing function of Cyclic Redundancy Check, and produce various timing signals, synchronous indicating signal and alarm indication signal;
The outside of described N * 64K interface module connects physical layer driver V.35, provide one with being connected of data terminal equipment such as router, its bandwidth can be provided with by the N value;
Described MP interface module is finished internal register control and the inquiry of webmaster single-chip microcomputer to photoelectric switching circuit;
Described photoelectric switching circuit also comprises the alarm output module, and its output is indicated the operating state of current photoelectric switching circuit by the alarm indication information that the E1 interface module produces.
Described time slot is provided with control circuit and comprises some 8 DIP switches and the corresponding plurality of chips that is provided with, and by the DIP switch different conditions is set, and after latching through chip, by the webmaster single-chip microcomputer configuration information configuration is write chip;
Described webmaster single-chip microcomputer is by data/address wire, the configuration information of DIP switch and high-rise webmaster is write in the photoelectric switching circuit, use at local side, equipment working state and the warning information that collects reported to the webmaster dish by UART Universal Asynchronous Receiver Transmitter (UART) interface;
Further, be respectively arranged with indicator light in centralized frame of described local side and the far-end stand alone type machine box, it is connected with described photoelectric switching circuit.
Be respectively arranged with power supply in centralized frame of described local side and the far-end stand alone type machine box, the working power of multi-service fiber optical transceiver is provided; Described power supply is provided with resettable fuse, power supply is impacted when preventing that device interior from breaking down short circuit.
Optical access system of protocol converter provided by the invention can be expanded the transmission range and the range of application of V35 interface with the V35 interface conversion to E1 (European standard of transfer of data) interface by E1.
Description of drawings
Fig. 1 is the structural representation of protocol converter G.703/V35 among the present invention.
Embodiment
Following according to Fig. 1, a kind of preferred forms of the present invention is described:
The invention provides a kind of optical access system of protocol converter, it comprises the centralized frame of local side, far-end stand alone type machine box and is installed in the centralized frame of described local side and the interior G.703/V35 protocol converter of far-end stand alone type machine box;
Be provided with webmaster dish and some interfaces in the centralized frame of described local side; This interface is V35 interface and E1 interface;
Be provided with some interfaces in the described far-end stand alone type machine box; This interface is V35 interface and E1 interface:
As shown in Figure 1, described G.703/V35 protocol converter comprises successively the CPLD (CPLD) 6, photoelectric switching circuit 3, webmaster single-chip microcomputer 4 and the time slot that connect by circuit control circuit 5 is set;
Described G.703/V35 protocol converter also comprises the V35 interface circuit 1 that circuit respectively connects described photoelectric switching circuit 3 and CPLD (CPLD) 6, and this V35 interface circuit 1 connects the V35 interface in centralized frame of described local side and the far-end stand alone type machine box;
The V35 interface circuit that described V35 interface circuit 1 is N * 64K in the present embodiment, adopts SP322 and SP3232E interface chip to finish the level conversion of various clocks, data and control signal;
Described G.703/V35 protocol converter also comprises the E1 interface circuit 2 that circuit respectively connects described photoelectric switching circuit 3 and CPLD (CPLD) 6, and this E1 interface circuit 2 connects the E1 interface in centralized frames of described local side and the far-end stand alone type machine box;
Comprise 240 logical blocks (LEs) in the described CPLD (CPLD) 6, to handling, improve the reliability of photoelectric switching circuit 3 under operational environments such as high low temperature by the E1 input signal of E1 interface circuit 2 generations with by N * 64K input signal that V35 interface circuit 1 generates; In the present embodiment, the model that described CPLD (CPLD) 6 adopts ALTERA company to produce is the CPLD of EPM240;
Described CPLD (CPLD) 6 also links to each other with the configuration bus (PS-BUS) of photoelectric switching circuit 3, solves signals such as equipment work pattern and clock setting selection;
N * 64K input signal that described V35 interface circuit 1 generates is sent into CPLD (CPLD) 6 and is handled, and transfers to photoelectric switching circuit 3 again; And, be delivered directly to V35 interface circuit 1 by the signal that photoelectric switching circuit 3 is exported;
The signal of described E1 interface circuit 2 carries out the list/pair conversion of HDB3 sign indicating number by transformation by DS34C86, generates the E1 input signal of unipolar code, sends into CPLD (CPLD) 6 and handles, and transfer to photoelectric switching circuit 3 again; And after the unipolar code process list/pair conversion by photoelectric switching circuit 3 outputs, be delivered directly to E1 interface circuit 2;
Described photoelectric switching circuit 3 comprises the E1 interface module (HCC) that circuit connects, N * 64K interface module, microprocessor (MP) interface module;
Described E1 interface module comprises E1 interface input module and E1 interface output module, and it is the interface internal module; This E1 interface input module carries out clock recovery, HDB3 decoding and corresponding state-detection with the E1 signal of outside, when detected sign indicating number type is NRZ NRZ, shows that alarm detection is invalid; This E1 interface output module major function is to carry out high-density bipolar code (HDB3 sign indicating number) coding;
Described E1 interface module also comprises E1 and becomes frame module and E1 to separate frame module; In the present embodiment, it is G704A that described E1 becomes the model of frame module, and the model that E1 separates frame module is G704B; This E1 becomes frame module mainly to finish the function that signaling, synchronization character, expense is aggregated into frame structure, this E1 separate frame module finish prime frame synchronously, the multi-frame and the signaling multi-frame synchronizing function of Cyclic Redundancy Check, and produce various timing signals, synchronous indicating signal and alarm indication signal;
The outside of described N * 64K interface module connects physical layer driver V.35, provide one with being connected of data terminal equipment such as router, its bandwidth can be provided with by the N value;
Described MP interface module is finished internal register control and the inquiry of webmaster single-chip microcomputer to photoelectric switching circuit;
Described photoelectric switching circuit 3 also comprises the alarm output module, and its output is indicated the operating state of current photoelectric switching circuit by the alarm indication information that the E1 interface module produces.
Described time slot is provided with control circuit 5 and comprises 58 DIP switches and corresponding 5 chips that model is 74LV573 that are provided with, and by the DIP switch different conditions is set, and after latching through chip, by webmaster single-chip microcomputer 4 the configuration information configuration is write chip;
In the present embodiment, the model of described webmaster single-chip microcomputer 4 is SST89V564D, has 1K Byte Internal RAM and 64K Byte SuperFlash EEPROM in this webmaster single-chip microcomputer 4, supports In-Application Programming (IAP); This webmaster single-chip microcomputer 4 is by data/address wire, the configuration information of DIP switch and high-rise webmaster is write in the photoelectric switching circuit, use at local side, equipment working state and the warning information that collects reported to the webmaster dish by UART Universal Asynchronous Receiver Transmitter (UART) interface.
Further, be respectively arranged with indicator light 7 in centralized frame of described local side and the far-end stand alone type machine box, it is connected with described photoelectric switching circuit 3.
Be respectively arranged with power supply 8 in centralized frame of described local side and the far-end stand alone type machine box, the working power of multi-service fiber optical transceiver is provided, in the present embodiment, described power supply 8 adopts alternating voltage 220V AC (165～265V AC), frequency is 47Hz～63Hz, perhaps optional wide-voltage range, 85V～265V; Direct voltage-48V DC (36～-72V DC); Adopting maximum withstand voltage on described power supply 8 is 6V, and maximum is the resettable fuse of 1A by electric current, power supply is impacted when preventing that device interior from breaking down short circuit.
Optical access system of protocol converter provided by the invention can be expanded the transmission range and the range of application of V35 interface with the V35 interface conversion to E1 (European standard of transfer of data) interface by E1.
Claims (10)
1. an optical access system of protocol converter is characterized in that, comprises the centralized frame of local side, far-end stand alone type machine box and is installed in the centralized frame of described local side and the interior G.703/V35 protocol converter of far-end stand alone type machine box;
Described G.703/V35 protocol converter comprises the CPLD (6), photoelectric switching circuit (3), webmaster single-chip microcomputer (4) and the time slot that connect by circuit successively control circuit (5) is set.
2. optical access system of protocol converter as claimed in claim 1 is characterized in that, is provided with webmaster dish and some interfaces in the centralized frame of described local side; Described interface is V35 interface and E1 interface.
3. optical access system of protocol converter as claimed in claim 1 is characterized in that, is provided with some interfaces in the described far-end stand alone type machine box; Described interface is V35 interface and E1 interface.
4. optical access system of protocol converter as claimed in claim 1 is characterized in that, described G.703/V35 protocol converter also comprises the V35 interface circuit (1) that circuit respectively connects described photoelectric switching circuit (3) and CPLD (6);
Described V35 interface circuit (1) connects the V35 interface in centralized frame of described local side and the far-end stand alone type machine box;
Described V35 interface circuit (1) is the V35 interface circuit of N * 64K.
5. optical access system of protocol converter as claimed in claim 1 is characterized in that, described G.703/V35 protocol converter also comprises the E1 interface circuit (2) that circuit respectively connects described photoelectric switching circuit (3) and CPLD (6); Described this E1 interface circuit (2) connects the E1 interface in centralized frame of described local side and the far-end stand alone type machine box.
6. optical access system of protocol converter as claimed in claim 1 is characterized in that, described CPLD (6) links to each other with the configuration bus of photoelectric switching circuit (3); This CPLD comprises several logical blocks in (6).
7. optical access system of protocol converter as claimed in claim 1 is characterized in that, described photoelectric switching circuit (3) comprises the E1 interface module that circuit connects, N * 64K interface module, Microprocessor Interface module;
E1 interface input module, E1 interface output module, E1 that described E1 interface module comprises the circuit connection become frame module and E1 to separate frame module;
The outside of described N * 64K interface module connects physical layer driver V.35.
8. optical access system of protocol converter as claimed in claim 7 is characterized in that, described photoelectric switching circuit (3) also comprises the alarm output module.
9. optical access system of protocol converter as claimed in claim 1 is characterized in that, described time slot is provided with control circuit (5) and comprises some 8 DIP switches and the corresponding plurality of chips that is provided with.
10. optical access system of protocol converter as claimed in claim 1 is characterized in that, also is respectively arranged with indicator light (7) and power supply (8) in centralized frame of described local side and the far-end stand alone type machine box;
Described indicator light (7) is connected with described photoelectric switching circuit (3);
Described power supply (8) provides the working power of multi-service fiber optical transceiver; Described power supply (8) is provided with resettable fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610028796 CN101106430B (en) | 2006-07-11 | 2006-07-11 | Optical access system of protocol converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200610028796 CN101106430B (en) | 2006-07-11 | 2006-07-11 | Optical access system of protocol converter |
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| CN101106430A true CN101106430A (en) | 2008-01-16 |
| CN101106430B CN101106430B (en) | 2012-06-27 |
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| CN 200610028796 Expired - Fee Related CN101106430B (en) | 2006-07-11 | 2006-07-11 | Optical access system of protocol converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312710A (en) * | 2013-06-14 | 2013-09-18 | 成都思迈科技发展有限责任公司 | E1 protocol converter with indication interfaces |
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- 2006-07-11 CN CN 200610028796 patent/CN101106430B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103312710A (en) * | 2013-06-14 | 2013-09-18 | 成都思迈科技发展有限责任公司 | E1 protocol converter with indication interfaces |
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| CN101106430B (en) | 2012-06-27 |
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Granted publication date: 20120627 Termination date: 20130711 |