CN203027261U - Optical transmission system - Google Patents
Optical transmission system Download PDFInfo
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- CN203027261U CN203027261U CN 201320054425 CN201320054425U CN203027261U CN 203027261 U CN203027261 U CN 203027261U CN 201320054425 CN201320054425 CN 201320054425 CN 201320054425 U CN201320054425 U CN 201320054425U CN 203027261 U CN203027261 U CN 203027261U
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Abstract
The utility model relates to an optical transmission system which comprises a plastic optical fiber multiuser network unit for conversion between quartz optical fiber signals and plastic optical fiber signals, a plastic optical fiber gateway and plastic optical fiber. The plastic optical fiber multiuser network unit is connected with a first connecting side of the plastic optical fiber gateway through the plastic optical fiber, and the second connecting side of the plastic optical fiber gateway is connected with a terminal device of the user. The plastic optical fiber gateway is used for mutual communication among networks based on different system structures or protocols. According to the system provided by the utility model also takes an FTTB (Fiber To The Building) network building mode, so that the problems in adoption of FTTH (Fiber To The Home) that lots of indoor ONU (Optical Network Unit) devices are installed, construction and maintenance are difficult and cost is high are solved since the plastic optical fiber gateway is used to accomplish FTTH.
Description
Technical field
The utility model relates to a kind of optical transmission system, relates in particular to the optical transmission system that FTTB evolves to FTTH.
Background technology
All the time, terminal network is all take copper cable as main.Copper cash is subjected to the restriction of loss, bandwidth and noise.Silica fiber is not suitable for repeatedly plugging, crooked, vibrations, and the construction testing maintenance cost is high, is difficult at user side universal.Along with the rise of the emerging services such as video, data and voice, the terminal use is growing to the broadband demand, and Access Network becomes the industry development center of gravity after backbone network and establishing of MAN.The Access Network fiberize is that new generation network is built most important part, and fiber entering household has become the important indicator that people weigh office conditions and living environment.
In numerous " light entering and copper back " patterns, based on the FTTB(Fiber-To-The-Building of passive optical network technique (PON)) and FTTH(Fiber to the home) become the main flow scheme.During FTTB and FTTH implement, its headend equipment OLT(optical line terminal) all be placed on machine room, the ONU(optical node device of FTTB) be placed in the user building and configure simultaneously power supply, silica fiber is routed to building, user place, and ONU goes downwards to the user and adopts copper cable to connect; The ONU of FTTH is placed on and configures simultaneously power supply in user family, and silica fiber is routed to each user.China is the widest country of global FTTB model application, has a large amount of copper cash scene of registering one's residence.Although FTTB has shortened end copper wire access distance than traditional access way, adopt DSL or LAN mode to access, construction is simple, cost of equipment is low, later maintenance is easy, but from using copper cable to lay to the user in the building, equipment easily is struck by lightning, communication quality is poor, transmission rate is slow, can satisfy in a short time the business demands such as SD IPTV, and still there is a big difference apart from each bandwidth requirement more than user 50M of high definition epoch, need to more network evolution or the upgrading of high bandwidth, could adapt to the development of following business.FTTH is developing goal, and transmission speed is fast, can avoid thunderbolt, eliminates electromagnetic interference, but residential quarter ODF(fibre distribution frame) to terminal, several scenes, construction mode disunity are arranged; Particularly after Fiber-To-The-Building, the silica fiber construction link is many, difficulty is large, the device kind is numerous and diverse, lacks standard, difficult wiring, needs professional's test maintaining, in addition, the laser beam of silica fiber transmission has potential safety hazard to the user, the offal treatment existing problems of silica fiber operation process, even Fiber to the home, terminal equipment also is difficult to realize the interconnected of light.
According to prior art, if existing FTTB is transformed and be upgraded to FTTH, planning network is topological again, increase passive optical splitting point, change optical cable, abolish corridor ONU equipment, newly put indoor ONU etc., the transformation and upgrade engineering is difficult, the cycle is long, and causes the goods and materials waste.Therefore, two kinds of patterns of FTTH and FTTB are relatively independent, before not seamlessly transitting effective ways, with long-term co-existence.
Because FTTB adopts silica fiber between ONU, therefore, following defective can occur: anti-bending performance is poor, easily fractures, and causes installation difficulty large, and installation cost is high.The descending employing copper cable of ONU connects, and following defective can occur: disturbed by forceful electric power, confidentiality and fail safe are relatively poor, easily are ravesdropping, and weight is large, causes installing inconvenient.
In view of this, plastic fiber occurred on the market, plastic fiber is the information industry that has theoretical significance and application prospect over nearly more than 20 years in the polymer science field with one of material, and large fibre core makes its connection become easy, easily aims at, and installation cost is very low; Numerical aperture is large, and is high with the coupling efficiency of light source and receiving device; Material is cheap, and low cost of manufacture is of many uses.How plastic fiber is applied in FTTB or FTTH, and, can have better transmission quality, be the industry urgent problem.
The utility model content
The purpose of this utility model is to propose a kind of optical transmission system, and it can solve in the FTTB transformation and upgrading to the process of FTTH, the problem that the difficulty of construction that causes is large, cost is high.
In order to achieve the above object, the technical scheme that adopts of the utility model is as follows:
A kind of optical transmission system, it comprises be used to the plastic fiber multi-user optical network unit of realizing that silica fiber light signal and plastic fiber light signal are changed mutually, plastic fiber gateway and plastic fiber; Described plastic fiber gateway comprises the first plastic fiber optical-electrical converter, the gateway chip that is connected with the first plastic fiber optical-electrical converter, and the second plastic fiber optical-electrical converter or the Ethernet interface that is connected with the gateway chip; Described plastic fiber multi-user optical network unit connects by plastic fiber the first plastic fiber optical-electrical converter that the plastics optical networking closes, and the second plastic fiber optical-electrical converter or the Ethernet interface of plastic fiber gateway are connected with user's terminal equipment.
Preferably, described Ethernet interface is the RJ45 interface.
Preferably, also be connected with a limiting amplifier between described gateway chip and the first plastic fiber optical-electrical converter.Further preferred, described gateway chip also is connected with one or more in one first conversion chip, a USB interface, a wireless WLAN chip, and described the first conversion chip also connects a RJ11 interface, and described wireless WLAN chip also connects an antenna.
Preferably, described gateway chip also is connected with a RJ11 interface by one first conversion chip.
Preferably, be connected with one second conversion chip between described gateway chip and the first plastic fiber optical-electrical converter.Further preferred, also be connected with a limiting amplifier between described the second conversion chip and the first plastic fiber optical-electrical converter.
Above-mentioned limiting amplifier is used for improving the transmission quality of signal.
The utlity model has following beneficial effect:
1, continue to use FTTB networking pattern, utilize the plastic fiber gateway to realize FTTH, solved the indoor ONU equipment of a large amount of installations that FTTH exists, construction maintenance difficulty, the problem that cost is high.Build and during existing network transforms at new net, when realizing that fast low-cost optical fiber is registered one's residence, provide the optical interconnection of terminal equipment after the fiber entering household and solution that terminal network seamlessly transits from Fast Ethernet to G level Ethernet and construction plan efficiently.
2, adopt plastic fiber (POF) to connect, compare with copper cable, have, exempt from electromagnetic interference, crosstalk and noise without electromagnetic interference: POF; The electricity isolation: the POF optical network apparatus is the electricity isolation; Save the space: to when young 50%, the shared space of therefore connecting up is little than TP twisted-pair feeder for the diameter of POF optical cable; Lightweight: POF is lighter at least 4 times than category-5 cable, therefore can save the shipment cost; Connect fast: can cut off at an easy rate and be connected; Reliability and durability: POF can stand larger vibrations; Easily install: because need not the inhibition of crosstalk and noise, therefore be easy to install; Be communicated with test simple: only need do the test of link insertion loss; Have confidentiality and fail safe: the POF optical cable is difficult to be ravesdropping; Zero radiation: POF does not have the advantages such as electromagnetic radiation generation.Compare with silica fiber, have, Fast Installation: POF can pass through narrow and small penetration pipe at an easy rate; Easily connect: POF also can reach good connection effect without polishing, also need not adopt in order to connect special-purpose equipment; Low cost: owing to possessing above 2 advantages, so adopt POF to do the network access system of transmission medium, its cost is lower than silica fiber connecting system; Sturdy and durable: the POF optical cable is more pliable and tough more durable than quartzy optical cable, and bending radius is also little; Simply, the connection test of safety: when adopting the LED red-light source of 650nm, transmit under safe visible red, meet a safety standard.
3, be combined limiting amplifier in innovation ground with the plastic fiber gateway, can become constant PECL voltage to be input to the gateway chip voltage transitions that the plastic fiber optical-electrical converter is exported, and solved the problem that error code appears in receive data, improved the transmission quality of signal.
Description of drawings
Fig. 1 is the functional-block diagram of the optical transmission system of the utility model embodiment one;
Fig. 2 is the functional-block diagram of multi-user's optical network unit (MDU) of the optical transmission system of the utility model embodiment one;
Fig. 3 is the functional-block diagram of plastic fiber gateway of the optical transmission system of the utility model embodiment one;
Fig. 4 is the structural representation of limiting amplifier of the optical transmission system of the utility model embodiment one;
Fig. 5 is for being the winding diagram between the gateway chip of the optical transmission system of the utility model embodiment one, the second conversion chip, limiting amplifier, the first plastic fiber optical-electrical converter;
Fig. 6 is the gateway chip of optical transmission system of the utility model embodiment one and the MII interface connection layout between the second conversion chip;
Fig. 7 is the functional-block diagram of plastic fiber gateway of the optical transmission system of the utility model embodiment two;
Fig. 8 is for being the winding diagram between the gateway chip of the optical transmission system of the utility model embodiment two, limiting amplifier, the first plastic fiber optical-electrical converter;
Fig. 9 is the functional-block diagram of plastic fiber gateway of the optical transmission system of the utility model embodiment three.
Reference numeral: 1, plastic fiber multi-user optical network unit; 11, silica fiber optical-electrical converter; 12, ONU chip; 13, the 3rd plastic fiber optical-electrical converter; 2, plastic fiber gateway; 21, RJ45 interface; 22, gateway chip; 23, the second conversion chip; 24, limiting amplifier; 25, the first plastic fiber optical-electrical converter; 26, the first conversion chip; 27, RJ11 interface; 28, the second plastic fiber optical-electrical converter; 29, wireless WLAN chip; 291, antenna; 210, USB interface; 3, plastic fiber; 100, OLT; 200, ODN; 300, optical branching device; 400, terminal equipment.
Embodiment
Below, by reference to the accompanying drawings and embodiment, the utility model is described further.
Embodiment one
As shown in Figure 1, a kind of optical transmission system, with the networking of FTTB pattern, it comprises in the corridor that is arranged on building and is used for realizing the plastic fiber multi-user optical network unit 1 that silica fiber light signal and plastic fiber light signal are changed mutually, is arranged on the indoor plastic fiber gateway 2 of user and plastic fiber 3.Described plastic fiber multi-user optical network unit 1 closes the first connection side (being the first plastic fiber optical-electrical converter 25 of Fig. 3, Fig. 7, Fig. 9) of 2 by plastic fiber 3 connection plastics optical networkings, second of plastic fiber gateway 2 connects side (being the second plastic fiber optical-electrical converter 28, RJ45 interface 25, RJ11 interface, USB interface 210, the antenna 291 of Fig. 3, Fig. 7, Fig. 9) and is connected with user's terminal equipment 400, realizes FTTH.
Described plastic fiber multi-user optical network unit 1 is controlled by OLT 100 by silica fiber first line of a couplet optical branching device 400 and through optical distribution (ODN) 200.General, as shown in Figure 2, plastic fiber multi-user optical network unit 1 includes silica fiber optical-electrical converter 11(such as Hisense company, model is LTB34D2), the 3rd plastic fiber optical-electrical converter 13(such as Firecomms company, model is EDL-300T or EDL301T), ONU chip 12(such as Cortina system house, model is CS8016, perhaps BROADCOM company, model is BCM53284 or BCM56024), power supply (figure does not look) and corresponding power supply circuits and crystal oscillating circuit (figure does not look); Conducting is connected with downlink port with the uplink port of described ONU chip 12 respectively for silica fiber optical-electrical converter 11 and the 3rd plastic fiber optical-electrical converter 13, wherein, described ONU chip 12 internal integrations function of exchange with support 100Base-FX PHY or 1000Base-FX PHY, be mainly used in completing the mutual conversion of the silica fiber optical-electrical converter signal of telecommunication (call not only horizontal electrical signal) and the plastic fiber optical-electrical converter signal of telecommunication (but also being the downlink electrical signal); Silica fiber optical-electrical converter 11 can be provided with silica fiber interface (not showing in figure), is mainly used in completing the mutual conversion of silica fiber light signal and the silica fiber optical-electrical converter signal of telecommunication; The 3rd plastic fiber optical-electrical converter 13 can be provided with plastic fiber port (not showing in figure), is mainly used in completing the mutual conversion of the plastic fiber optical-electrical converter signal of telecommunication and plastic fiber light signal.(also need explanation to be, the uplink port of ONU chip 12 is used for receiving the silica fiber optical-electrical converter signal of telecommunication that silica fiber optical-electrical converter 11 sends, and downlink port is used for sending the plastic fiber optical-electrical converter signal of telecommunication of ONU chip 12 conversions.) conversion method of silica fiber light signal and plastic fiber light signal specifically comprises the following steps:
At first, silica fiber optical-electrical converter 11 will be converted to the silica fiber optical-electrical converter signal of telecommunication by the silica fiber light signal that the silica fiber interface receives, and after be delivered to ONU chip 12;
Then, ONU chip 12 directly is converted to the PECL signal of telecommunication (being the plastic fiber optical-electrical converter signal of telecommunication) with the signal of telecommunication, and is delivered to the 3rd plastic fiber optical-electrical converter 13;
At last, the light signal that the 3rd plastic fiber optical-electrical converter 13 converts the PECL signal of telecommunication to 650nm is sent to plastic fiber gateway 2 by plastic fiber 3 with light signal, connects user's terminal equipment 400.
Otherwise, can realize that the silica fiber light signal is converted to the plastic fiber light signal.
The plastic fiber 3 of the present embodiment can guarantee bandwidth Design according to 1 up-downgoing of plastic fiber multi-user optical network unit.For example, when 1 up-downgoing of plastic fiber multi-user optical network unit guaranteed that bandwidth is no more than 1.25G, plastic fiber 3 was phase step type plastics optical fibre, and loss factor is less than 260dB/km; When 1 up-downgoing of plastic fiber multiple-user network unit guaranteed that bandwidth surpasses 1.25G, plastic fiber 3 was gradational plastic optical fibre, and loss factor is less than 230dB/km.
Carry out intercommunication between the network of plastic fiber gateway 2 for different architecture or agreement.
As shown in Figure 3, the plastic fiber gateway 2 of the present embodiment comprises the first plastic fiber optical-electrical converter 25, limiting amplifier 24, the second conversion chip 23, gateway chip 22 and the RJ45 interface 21 that connects successively, the first conversion chip 26 that is connected with gateway chip 22, the RJ11 interface 27 that is connected with the first conversion chip 26.Wherein, described RJ45 interface 21 connects side (being the downlink port side) as second of plastic fiber gateway 2, and the first plastic fiber optical-electrical converter 25 connects side (being the uplink port side) as first of plastic fiber gateway 2.The first plastic fiber optical-electrical converter 25 of plastic fiber gateway 2 is used for being connected by the 3rd plastic fiber optical-electrical converter 13 of plastic fiber 3 with plastic fiber multiple-user network unit 1, completes the mutual conversion of downlink electrical signal and plastic fiber light signal.It is the PEB33322EL chip that the first conversion chip 26 can be selected model, and it is the IP113A chip that the second conversion chip 23 can be selected model.It is the KSZ8695X chip that gateway chip 22 can be selected model, for the conversion that realizes between different communication protocol.Can realize the Web-compatibles such as protocol conversion, Route Selection, exchanges data by this plastic fiber gateway 2, to carrying out intercommunication between the network of different architecture or agreement.
For the gateway chip of different manufacturers, the design aspect its physical layer (PHY) is different, and the PECL voltage that can receive and launch is also different.Because of the first plastic fiber optical-electrical converter 25(as, Firecomms EDL 300) output PECL voltage is that 0.6V adds bias supply 1.2V, its scope is in the reception power supply thresholding (low-voltage＜1.8V of realtek chip (the gateway chip of certain type), high voltage〉2.14V) critical condition, cause the erroneous judgement of receive data state, after the access plastic fiber, no matter have or not transfer of data, the accepting state lamp glimmers always.Therefore we are for this characteristic of plastic fiber transceiver, proposition added limiting amplifier 24 circuit modules before the plastic fiber optical-electrical converter, can be with the transceiver module of Optolock(plastic fiber optical-electrical converter) output 600mV voltage transitions become constant PECL voltage (low-voltage 1.2V, high voltage 2.5V) be input to the gateway chip, solve the error code that receive data occurs, improved the transmission quality of signal.
Wherein, Fig. 4 is the circuit theory diagrams of the limiting amplifier 24 of the present embodiment.The implication of each port is as follows.
CAZ1, CAZ2: two differential electrical line balls pair, be used for realizing difference correction, when connecing an electric capacity between CAZ1 and CAZ1, realize loop difference correction function, when between CAZ1 and CAZ2 during short circuit, indifference is divided calibration function.
DIN+, DIN-: two differential signal inputs are right.
DOUT+, DOUT-: two differential signal outputs are right.
DIS: forbid that output controls pin, can compatible PECL(Positive Emitter-Coupled Logic) or the input of COMS class.When the DIS pin was made as high level, output signal remained on static logic 0 state.When output signal end was forbidden exporting, LOS (low-voltage warning) function was still in running order.When DIS terminated to the LOS end, the automatic silencing function was opened.
LOS: forward voltage warning output, when making signal input voltage, the input of holding outer meeting resistance by TH falls to lower than threshold voltage the time, LOS is in high level, when applied signal voltage during higher than threshold voltage, the LOS end is in low level, when LOS was connected directly to the DIS end, at this moment the automatic silencing function was opened.
/ LOS: negative sense forward voltage warning output, when making signal input voltage, the input of holding outer meeting resistance by TH falls to lower than threshold voltage the time ,/LOS the high level of coming in and going out, during higher than threshold voltage ,/LOS end is in low level when applied signal voltage.
CSD: external filter capacitor is realized the signal filtering function to Input voltage terminal.
TH: external input resistance R
TH, the threshold voltage of LOS end is set, thereby passes through the state value of voltage detecting (Power Detector) indication LOS.This port can not be unsettled.
as shown in Figure 5, gateway chip 22, the second conversion chip 23, limiting amplifier 24, wiring between the first plastic fiber optical-electrical converter 25 is closed: gateway chip 22 is connected with the second conversion chip 23 by the MII interface, the differential signal of the second conversion chip 23 sends TX+, the differential signal of TX-and the first plastic fiber optical-electrical converter 25 sends TX+, TX-connects, the differential signal of the second conversion chip 23 receives RX+, two differential signal outputs of RX-and limiting amplifier 24 are to DOUT+, DOUT-connects, two differential signal inputs of limiting amplifier 24 are to DIN+, the differential signal of DIN-and the first plastic fiber optical-electrical converter 25 receives RX+, RX-connects.
Fig. 6 is the winding diagram of the MII interface between gateway chip 22 and the second conversion chip 23.Wherein, TX_ER: wrong port sends datagram;
TX_EN: transmitted signal Enable Pin;
TX_CLK: tranmitting data register port;
TXD[3:0]: send FPDP 0,1,2,3;
RX_ER: the receive data port that reports an error;
RX_DV: the effective port of receive data;
RX_Clk: receive clock port;
RXD[3:0]: receive data port 0,1,2,3
CRS: chip interrupt state display port;
COL: collision detection port.
Embodiment two
As shown in Figure 7, the present embodiment is that from the difference of embodiment one structure of plastic fiber gateway is different.Concrete, the plastic fiber gateway 2 of the present embodiment comprises the first plastic fiber optical-electrical converter 25, limiting amplifier 24, gateway chip 22 and the RJ45 interface 21 that connects successively, the first conversion chip 26 that is connected with gateway chip 22, the RJ11 interface 27 that is connected with the first conversion chip 26.Wherein, described RJ45 interface 21 connects side (being the downlink port side) as second of plastic fiber gateway 2, and the first plastic fiber optical-electrical converter 25 connects side (being the uplink port side) as first of plastic fiber gateway 2.That is to say, the first plastic fiber optical-electrical converter 25 of the present embodiment is connected with gateway chip 22 by limiting amplifier 24, can not need the participation of the second conversion chip.It is the PEB33322EL chip that the first conversion chip 26 can be selected model.
As shown in Figure 8, wiring between gateway chip 22, limiting amplifier 24, the first plastic fiber optical-electrical converter 25 is closed: the differential signal of gateway chip 22 sends TX+, TX-are sent with the differential signal of the first plastic fiber optical-electrical converter 25 TX+, TX-is connected, the differential signal of gateway chip 22 receives RD+, RD-is connected DOUT+, DOUT-with two differential signal outputs of limiting amplifier 24, and two differential signal inputs of limiting amplifier 24 receive with the differential signal of the first plastic fiber optical-electrical converter 25 DIN+, DIN-RX+, RX-are connected.
Embodiment three
As shown in Figure 5, the present embodiment is that from the difference of embodiment one structure of plastic fiber gateway is different.Concrete, the plastic fiber gateway 2 of the present embodiment comprises the first plastic fiber optical-electrical converter 25, limiting amplifier 24, gateway chip 22, the second plastic fiber optical-electrical converter 28 that connects successively, the first conversion chip 26 that is connected with gateway chip 22 respectively, RJ45 interface 21, USB interface 210, wireless WLAN chip 29, the RJ11 interface 27 that is connected with the first conversion chip 26, and the antenna 291 that is connected with wireless WLAN chip 29.Wherein, the first plastic fiber optical-electrical converter 25 connects side as first of plastic fiber gateway 2, and the second plastic fiber optical-electrical converter 28 connects side as second of plastic fiber gateway 2.RJ11 interface 27 is mainly used in outer answering the call, and can select model by the first conversion chip 26 connection gateway chip 22, the first conversion chips 26 is the PEB33322EL chip; Wireless WLAN signal is by wireless WLAN chip 29 modulation /demodulation; It is the BCM93379 chip that gateway chip 22 can be selected model, can realize the Web-compatibles such as protocol conversion, Route Selection, exchanges data by this plastic fiber gateway 2, to carrying out intercommunication between the network of different architecture or agreement.Wiring relation between the gateway chip 22 of the present embodiment, limiting amplifier 24, the first plastic fiber optical-electrical converter 25 is identical with embodiment two.
In the various embodiments described above, terminal equipment 400 includes but not limited to computer, the network printer, Web TV, web camera, network telephone, intelligent electric meter; Gate control system, all-purpose card, POS machine, video on-demand system, video conference terminal, data acquisition system, digital audio broadcast system, smoke detector, air conditioner, microwave oven, refrigerator, illuminator.
In the various embodiments described above, for the gateway chip of different manufacturers, the design aspect its physical layer (PHY) is different, and the PECL voltage that can receive and launch is also different.Because of the first plastic fiber optical-electrical converter 25(as, Firecomms EDL 300) output PECL voltage is that 0.6V adds bias supply 1.2V, its scope is in the reception power supply thresholding (low-voltage＜1.8V of realtek chip (the gateway chip of certain type), high voltage〉2.14V) critical condition, cause the erroneous judgement of receive data state, after the access plastic fiber, no matter have or not transfer of data, the accepting state lamp glimmers always.Limiting amplifier 24 in the various embodiments described above can be with the transceiver module of Optolock(plastic fiber optical-electrical converter) output 600mV voltage transitions become constant PECL voltage (low-voltage 1.2V, high voltage 2.5V) be input to the gateway chip, solve the problem that error code appears in receive data, improved the transmission quality of signal.
For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and the distortion all should belong to the protection range of the utility model claim within.
Claims (9)
1. an optical transmission system, is characterized in that, comprises be used to the plastic fiber multi-user optical network unit of realizing that silica fiber light signal and plastic fiber light signal are changed mutually, plastic fiber gateway and plastic fiber; Described plastic fiber gateway comprises the first plastic fiber optical-electrical converter, the gateway chip that is connected with the first plastic fiber optical-electrical converter, and the second plastic fiber optical-electrical converter or the Ethernet interface that is connected with the gateway chip; Described plastic fiber multi-user optical network unit connects by plastic fiber the first plastic fiber optical-electrical converter that the plastics optical networking closes, and the second plastic fiber optical-electrical converter or the Ethernet interface of plastic fiber gateway are connected with user's terminal equipment.
2. optical transmission system as claimed in claim 1, is characterized in that, described Ethernet interface is the RJ45 interface.
3. optical transmission system as claimed in claim 1, is characterized in that, also is connected with a limiting amplifier between described gateway chip and the first plastic fiber optical-electrical converter.
4. optical transmission system as claimed in claim 3, it is characterized in that, described gateway chip also is connected with one or more in one first conversion chip, a USB interface, a wireless WLAN chip, described the first conversion chip also connects a RJ11 interface, and described wireless WLAN chip also connects an antenna.
5. optical transmission system as claimed in claim 3, it is characterized in that, the differential signal of gateway chip sends sending being connected with the differential signal of the first plastic fiber optical-electrical converter, the differential signal of gateway chip receives exporting being connected with two differential signals of limiting amplifier, and two differential signals inputs of limiting amplifier are to receiving being connected with the differential signal of the first plastic fiber optical-electrical converter.
6. optical transmission system as claimed in claim 1, is characterized in that, described gateway chip also is connected with a RJ11 interface by one first conversion chip.
7. optical transmission system as claimed in claim 1, is characterized in that, is connected with one second conversion chip between described gateway chip and the first plastic fiber optical-electrical converter.
8. optical transmission system as claimed in claim 7, is characterized in that, also is connected with a limiting amplifier between described the second conversion chip and the first plastic fiber optical-electrical converter.
9. optical transmission system as claimed in claim 8, it is characterized in that, the gateway chip is connected with the second conversion chip by the MII interface, the differential signal of the second conversion chip sends sending being connected with the differential signal of the first plastic fiber optical-electrical converter, the differential signal of the second conversion chip receives exporting being connected with two differential signals of limiting amplifier, and two differential signals inputs of limiting amplifier are to receiving being connected with the differential signal of the first plastic fiber optical-electrical converter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320054425 CN203027261U (en) | 2013-01-30 | 2013-01-30 | Optical transmission system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320054425 CN203027261U (en) | 2013-01-30 | 2013-01-30 | Optical transmission system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107844A (en) * | 2013-01-30 | 2013-05-15 | 深圳市中技源专利城有限公司 | Optical transmission system |
| CN104794786A (en) * | 2015-04-15 | 2015-07-22 | 深圳前海芝麻开门网络通讯有限公司 | PON based access control system |
| CN106936499A (en) * | 2015-12-31 | 2017-07-07 | 南京宇能新能源科技有限公司 | Intelligent residential district optical communication network and sensing network |
-
2013
- 2013-01-30 CN CN 201320054425 patent/CN203027261U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107844A (en) * | 2013-01-30 | 2013-05-15 | 深圳市中技源专利城有限公司 | Optical transmission system |
| CN104794786A (en) * | 2015-04-15 | 2015-07-22 | 深圳前海芝麻开门网络通讯有限公司 | PON based access control system |
| CN106936499A (en) * | 2015-12-31 | 2017-07-07 | 南京宇能新能源科技有限公司 | Intelligent residential district optical communication network and sensing network |
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