CN101106431B - Optical access system for optical modem applicable to European data transfer data - Google Patents
Optical access system for optical modem applicable to European data transfer data Download PDFInfo
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- CN101106431B CN101106431B CN 200610028798 CN200610028798A CN101106431B CN 101106431 B CN101106431 B CN 101106431B CN 200610028798 CN200610028798 CN 200610028798 CN 200610028798 A CN200610028798 A CN 200610028798A CN 101106431 B CN101106431 B CN 101106431B
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Abstract
An optical modem fiber access system applied for data transmission European standard, comprises a local end centralized frame, a remote end independent box and an E1 optical modem arranged in the local end centralized frame and the remote end independent box; the E1 optical modem comprises, in sequential circuit connection, a setting control circuit, a network management single chip microcomputer, a photo-electric conversion circuit, and a Complex Programmable Logic Device (CPLD). An European-data-transmission-standard optical modem fiber access system provided in the invention is a part of multi-service fiber access system, mainly utilizes Synchronous Digital Hierarchy (SDH) and cable resources, and allows traditional fixed network operators to continuously provide and expand private services by extending the coverage area of Time Division Multiplex (TDM) private line via optical fiber.
Description
Technical field
The present invention relates to a kind of optical modem Fiber Access System that is applicable to the transfer of data European standard, relate in particular to the optical modem that is applicable to the transfer of data European standard in a kind of multi-service Fiber Access System.
Background technology
The transition of communication network force the network operator to face great challenge.Professional development no longer is confined to simply provide telephone service, 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 traditional metropolitan area network of main purpose and Access Network all can't satisfy diversified new business transmission and handle on capacity and kind of interface requirement 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/asynchronous transfer mode (TDM/DDN/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.
Light cat series, converter series, fiber optical transceiver series and PDH (Pseudo-synchronous Digital Hierarchy) (PDH series) equipment are that a kind of data that each big operator generally adopts insert and transmission means at present, 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/asynchronous transfer mode (SDH/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
A kind of optical modem Fiber Access System that is applicable to the transfer of data European standard provided by the invention, it is the part in the multi-service Fiber Access System, mainly utilize SDH (synchronous digital hierarchy) and cable resource, by the coverage of optic fibre extension TDM (time division multiplex system) special line, make traditional fixed network operator can continue to provide and enlarge private line service.
In order to achieve the above object, the invention provides a kind of E1 (European standard of transfer of data) optical modem Fiber Access System, comprise the centralized frame of local side, far-end stand alone type machine box and be installed in the centralized frame of described local side and the interior E1 optical modem of far-end stand alone type machine box;
The centralized frame of described local side comprises power supply and webmaster dish, also is provided with some interfaces and indicator light;
Described far-end stand alone type machine box comprises power supply, also is provided with some interfaces and indicator light;
Power supply in centralized frame of described local side and the far-end stand alone type machine box is described E1 optical modem power supply;
Described E1 optical modem comprises that circuit successively connects is provided with control circuit, webmaster single-chip microcomputer, photoelectric switching circuit and CPLD (CPLD);
Described E1 optical modem also comprises the E1 interface circuit that circuit connects described photoelectric switching circuit and CPLD (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;
Described E1 optical modem also comprises the optical interface circuit that circuit connects described CPLD (CPLD), and this optical interface circuit connects the optical interface in centralized frame of described local side and the far-end stand alone type machine box;
Described photoelectric switching circuit connects the indicator light on the centralized frame of described local side and the far-end stand alone type machine box, by indicator light can checkout equipment state;
The described control circuit that is provided with comprises corresponding some DIP switches and the 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 register of 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;
E1 interface module, optical interface module, E1 that described photoelectric switching circuit comprises the circuit connection become frame module, E1 to separate frame module, microprocessor (MP) interface module and alarm output module;
The E1 interface module is made up of E1 interface input module and E1 interface output module;
The major function of E1 interface input module is that the E1 signal with the outside carries out clock recovery, HDB3 (high-density bipolar code) decoding and corresponding state-detection, and when a sign indicating number type was NRZ (NRZ), the disappearance alarm detection was invalid;
E1 interface output module major function is to carry out the HDB3 coding;
E1 becomes frame module mainly to finish the function that signaling, synchronization character, expense is aggregated into frame structure;
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 optical interface module is made of optical transmission module and Optical Receivers;
Optical transmission module carries out multiplexing and encoding, scrambler according to the clock that timing control module TDC provides with E1 to be sent and other overhead data, then code stream is sent to the optical interface circuit;
Optical Receivers is mainly finished from the optical interface circuit and is received data, extracts line clock, finishes data de-scrambling then, separates frame, recovers E1 and overhead data, the supervision and the circuit Bit Error Code Statistics of the line correlation of going forward side by side alarm;
The Microprocessor Interface module functions provides a direct interface corresponding with the webmaster single-chip microcomputer, finishes by the webmaster single-chip microcomputer internal register of photoelectric switching circuit is controlled and inquiry;
The alarm output module is exported various alarm indication informations, indicates the operating state of current chip;
Described CPLD (CPLD), comprise several logical blocks (LEs), mainly finish processing to E1 input signal and light signal, improve the reliability of photoelectric switching circuit under operational environments such as high low temperature, also link to each other in addition, solve signals such as equipment work pattern and clock setting selection with configuration bus (PS-BUS) in the photoelectric switching circuit;
The input signal of described E1 interface circuit is finished the list/pair conversion of high-density bipolar code HDB3 sign indicating number by behind the transformer, becomes to deliver to photoelectric switching circuit again after unipolar code is sent into the CPLD processing; The unipolar code of photoelectric switching circuit output is finished list/pair conversion through transformer, delivers to output interface;
Described optical interface circuit comprises one to be received data wire, one and sends out data wire, and can produce light mouth alarm indication signal, this optical interface circuit the optical signal equalizer of receiving is amplified and regeneration after output to CPLD; Optical interface circuit alarm indication signal is high if light signal receives normally, and it is low that light signal receives undesired then alarm indication signal; It is light signal that CPLD is with adjusted data to give the optical interface circuit conversion through sign indicating number.
A kind of optical modem Fiber Access System that is applicable to the transfer of data European standard provided by the invention, it is the part in the multi-service Fiber Access System, mainly utilize SDH (synchronous digital hierarchy) and cable resource, coverage by optic fibre extension TDM (time division multiplex system) special line, simple installation, be convenient to administering and maintaining of network operator, be convenient to the expansion of follow-up business, make traditional fixed network operator can continue to provide and enlarge private line service.
Description of drawings
Fig. 1 is the structural representation of the optical modem that is applicable to the transfer of data European standard in a kind of optical modem Fiber Access System that is applicable to the transfer of data European standard provided by the invention.
Embodiment
Following according to Fig. 1, specify a kind of better embodiment of the present invention:
A kind of E1 (European standard of transfer of data) optical modem Fiber Access System 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 E1 optical modem of far-end stand alone type machine box;
The centralized frame of described local side comprises power supply 8 and webmaster dish, also is provided with some interfaces and indicator light 7;
Described far-end stand alone type machine box comprises power supply 8, also is provided with some interfaces and indicator light 7;
Power supply 8 in centralized frame of described local side and the far-end stand alone type machine box is described E1 optical modem power supply;
Described E1 optical modem comprises that circuit successively connects is provided with control circuit 101, webmaster single-chip microcomputer 102, photoelectric switching circuit 103 and CPLD (CPLD) 104;
Described E1 optical modem also comprises the E1 interface circuit 105 that circuit connects described photoelectric switching circuit 103 and CPLD (CPLD) 104, and this E1 interface circuit 105 connects the E1 interface in centralized frame of described local side and the far-end stand alone type machine box;
Described E1 optical modem also comprises the optical interface circuit 106 that circuit connects described CPLD (CPLD) 104, and this optical interface circuit 106 connects the optical interface in centralized frame of described local side and the far-end stand alone type machine box;
Described photoelectric switching circuit 103 connects the indicator light 7 on centralized frames of described local side and the far-end stand alone type machine box, by indicator light 7 can checkout equipment state;
The described control circuit 101 that is provided with comprises corresponding some DIP switches and the plurality of chips that is provided with, and by the DIP switch different conditions is set, and after latching through chip, by webmaster single-chip microcomputer 102 the configuration information configuration is write chip;
In the present embodiment, described webmaster single-chip microcomputer 102 adopts SST89V564D, this webmaster single-chip microcomputer 102 is by data/address wire, the configuration information of DIP switch and high-rise webmaster is write in the register of photoelectric switching circuit 103, 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;
In the present embodiment, described photoelectric switching circuit 103 adopts the RC7235 chip, and E1 interface module, optical interface module, E1 that this photoelectric switching circuit 103 comprises the circuit connection become frame module, E1 to separate frame module, microprocessor (MP) interface module and alarm output module;
The E1 interface module is made up of E1 interface input module and E1 interface output module;
The major function of E1 interface input module is that the E1 signal with the outside carries out clock recovery, HDB3 (high-density bipolar code) decoding and corresponding state-detection, and when a sign indicating number type was NRZ (NRZ), the disappearance alarm detection was invalid;
E1 interface output module major function is to carry out the HDB3 coding;
E1 becomes frame module mainly to finish the function that signaling, synchronization character, expense is aggregated into frame structure;
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 optical interface module is made of optical transmission module and Optical Receivers;
Optical transmission module carries out multiplexing and encoding, scrambler according to the clock that timing control module TDC provides with E1 to be sent and other overhead data, then code stream is sent to the optical interface circuit;
Optical Receivers is mainly finished from the optical interface circuit and is received data, extracts line clock, finishes data de-scrambling then, separates frame, recovers E1 and overhead data, the supervision and the circuit Bit Error Code Statistics of the line correlation of going forward side by side alarm;
The Microprocessor Interface module functions provides a direct interface corresponding with the webmaster single-chip microcomputer, finishes by the webmaster single-chip microcomputer internal register of photoelectric switching circuit is controlled and inquiry;
The alarm output module is exported various alarm indication informations, indicates the operating state of current chip;
In the present embodiment, described CPLD 104 adopts the EPM240 chip, this CPLD 104 comprises several logical blocks (LEs), mainly finish processing to E1 input signal and light signal, improve the reliability of photoelectric switching circuit 103 under operational environments such as high low temperature, also link to each other in addition, solve signals such as equipment work pattern and clock setting selection with configuration bus (PS-BUS) in the photoelectric switching circuit 103;
The input signal of described E1 interface circuit 105 is finished the list/pair conversion of high-density bipolar code HDB3 sign indicating number by behind the transformer, becomes to deliver to photoelectric switching circuit 103 again after unipolar code is sent into the CPLD processing; The unipolar code of photoelectric switching circuit 103 outputs is finished list/pair conversion through transformer, delivers to output interface;
In the present embodiment, described optical interface circuit 106 adopts the optical module of 3.3V LVTTL (level formula transistor-transistor logic circuit) level, this optical interface circuit 106 comprises one and receives data wire, one data wire, and can produce light mouth alarm indication signal, this optical interface circuit 106 optical signal equalizer received is amplified and regeneration after output to CPLD; Optical interface circuit 106 alarm indication signals are high if light signal receives normally, and it is low that light signal receives undesired then alarm indication signal; CPLD is with adjusted data to give optical interface circuit 106 through sign indicating number and is converted to light signal.
A kind of optical modem Fiber Access System that is applicable to the transfer of data European standard provided by the invention, it is the part in the multi-service Fiber Access System, mainly utilize SDH (synchronous digital hierarchy) and cable resource, coverage by optic fibre extension TDM (time division multiplex system) special line, simple installation, be convenient to administering and maintaining of network operator, be convenient to the expansion of follow-up business, make traditional fixed network operator can continue to provide and enlarge private line service.
Claims (8)
1. optical modem Fiber Access System that is applicable to the transfer of data European standard, it is characterized in that, comprise the centralized frame of local side, far-end stand alone type machine box and be installed in the centralized frame of described local side and the interior E1 optical modem of far-end stand alone type machine box;
Described E1 optical modem comprises that circuit successively connects is provided with control circuit (101), webmaster single-chip microcomputer (102), photoelectric switching circuit (103) and CPLD (104), wherein, described CPLD comprises several logical blocks, and it links to each other with the configuration bus of described photoelectric switching circuit
The described control circuit that is provided with comprises corresponding some DIP switches and the plurality of chips that is provided with, described webmaster single-chip microcomputer is by data/address wire, the configuration information of described DIP switch and high-rise webmaster is write in the register of described photoelectric switching circuit, use at local side, equipment working state and the warning information that collects reported to the webmaster dish by the UART Universal Asynchronous Receiver Transmitter interface.
2. a kind of optical modem Fiber Access System that is applicable to the transfer of data European standard as claimed in claim 1 is characterized in that the centralized frame of described local side comprises power supply (8) and webmaster dish, also is provided with some interfaces and indicator light (7).
3. a kind of optical modem Fiber Access System that is applicable to the transfer of data European standard as claimed in claim 1 is characterized in that, described far-end stand alone type machine box comprises power supply (8), also is provided with some interfaces and indicator light (7).
4. a kind of optical modem Fiber Access System that is applicable to the transfer of data European standard as claimed in claim 1 is characterized in that,
Described E1 optical modem also comprises the E1 interface circuit (105) that circuit connects described photoelectric switching circuit (103) and CPLD (104), and this E1 interface circuit (105) connects the E1 interface in centralized frame of described local side and the far-end stand alone type machine box.
5. a kind of optical modem Fiber Access System that is applicable to the transfer of data European standard as claimed in claim 1 is characterized in that,
Described E1 optical modem also comprises the optical interface circuit (106) that circuit connects described CPLD (104), and this optical interface circuit (106) connects the optical interface in centralized frame of described local side and the far-end stand alone type machine box.
6. a kind of optical modem Fiber Access System that is applicable to the transfer of data European standard as claimed in claim 1 is characterized in that, described photoelectric switching circuit (103) connects the indicator light (7) on centralized frame of described local side and the far-end stand alone type machine box.
7. a kind of optical modem Fiber Access System that is applicable to the transfer of data European standard as claimed in claim 1, it is characterized in that E1 interface module, optical interface module, E1 that described photoelectric switching circuit (103) comprises the circuit connection become frame module, E1 to separate frame module, Microprocessor Interface module and alarm output module;
Described E1 interface module is made up of E1 interface input module and E1 interface output module;
Described optical interface module is made of optical transmission module and Optical Receivers.
8. a kind of optical modem Fiber Access System that is applicable to the transfer of data European standard as claimed in claim 5, it is characterized in that, described optical interface circuit (106) comprises one and receives data wire, one data wire, and can produce light mouth alarm indication signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610028798 CN101106431B (en) | 2006-07-11 | 2006-07-11 | Optical access system for optical modem applicable to European data transfer data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610028798 CN101106431B (en) | 2006-07-11 | 2006-07-11 | Optical access system for optical modem applicable to European data transfer data |
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| Publication Number | Publication Date |
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| CN101106431A CN101106431A (en) | 2008-01-16 |
| CN101106431B true CN101106431B (en) | 2011-09-07 |
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| CN 200610028798 Expired - Fee Related CN101106431B (en) | 2006-07-11 | 2006-07-11 | Optical access system for optical modem applicable to European data transfer data |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105353627B (en) * | 2015-10-30 | 2023-10-20 | 上海威锐电子科技股份有限公司 | CPLD-based intelligent wireless access device for optical fiber converter module |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001086194A (en) * | 1999-09-16 | 2001-03-30 | Japan Aviation Electronics Industry Ltd | Half duplex control optical modem |
| CN2676526Y (en) * | 2003-01-20 | 2005-02-02 | 北京安控科技发展有限公司 | Baseband transmission modem circuit |
| CN2938589Y (en) * | 2006-07-11 | 2007-08-22 | 上海科泰信息技术有限公司 | Optical fibre access system of light modem for data transmission of Europe standard |
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2006
- 2006-07-11 CN CN 200610028798 patent/CN101106431B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001086194A (en) * | 1999-09-16 | 2001-03-30 | Japan Aviation Electronics Industry Ltd | Half duplex control optical modem |
| CN2676526Y (en) * | 2003-01-20 | 2005-02-02 | 北京安控科技发展有限公司 | Baseband transmission modem circuit |
| CN2938589Y (en) * | 2006-07-11 | 2007-08-22 | 上海科泰信息技术有限公司 | Optical fibre access system of light modem for data transmission of Europe standard |
Non-Patent Citations (3)
| Title |
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| 张华栋,鲁守银,刑宏伟.光纤通讯在配网自动化系统中的应用.《山东电力技术》.2003,(第133期),33-35. * |
| 江苏吉山高新技术有限公司.JS-FOM/V35、JS-FOM/E1光纤调制解调器用户手册.《JS-FOM/V35、JS-FOM/E1光纤调制解调器用户手册》.2006,1-17. * |
| 陆文斌.光纤调制解调器-演绎最后一公里接入精彩.《通讯世界》.2005,(第129期),48-49. * |
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