CN202268989U - Optical line terminal (OLT) equipment applied to Ethernet passive optical network (EPON) system - Google Patents
Optical line terminal (OLT) equipment applied to Ethernet passive optical network (EPON) system Download PDFInfo
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- CN202268989U CN202268989U CN2011204305570U CN201120430557U CN202268989U CN 202268989 U CN202268989 U CN 202268989U CN 2011204305570 U CN2011204305570 U CN 2011204305570U CN 201120430557 U CN201120430557 U CN 201120430557U CN 202268989 U CN202268989 U CN 202268989U
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- olt
- filter
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Abstract
The utility model discloses optical line terminal (OLT) equipment applied to an Ethernet passive optical network (EPON) system. The OLT equipment is provided with terminal equipment, an optical receiver, an optical transmitter, a combiner, a filter and an optical path splitting device, wherein the terminal equipment is connected with and controls the optical receiver and the optical transmitter; the optical receiver receives a signal of the combiner through a multi-mode optical fiber; the combiner receives a signal of the optical path splitting device through a single-mode optical fiber; the optical path splitting device receives a signal of a user through an optical network unit; the optical transmitter transmits the signal to the filter through the multi-mode optical fiber; the filter sends a signal to the optical transmitter through the single-mode optical fiber; and the optical path splitting device sends the signal to the user through the optical network unit. The OLT equipment performs wavelength division multiplexing on a downlink and an uplink, and the multi-mode optical fiber is used for remote transmission, so that the utilization rate of resources is increased greatly.
Description
Technical field
The utility model relates to the optical fiber technology field, particularly a kind of OLT equipment that is used for the EPON system.
Background technology
After the OLT part of traditional EPON converges each service node signal of telecommunication of local side, convert light signal to, through the output of PON mouth, link to each other with ONU equipment through ODN network (optical fiber is formed with passive optical splitters) via single monomode fiber.Optical splitter is 1:n (n=2,4,8,16,32,64 etc.) along separate routes, with optical signal transmission to an ONU.The descending employing broadcast mode of ONU, the reception of ONU choice of equipment property.The up sharing mode that then adopts of ONU, synchronization has only the up transmission of one road ONU, takes the TDMS/CD mode to control, and data volume is low, and influence is used.
The utility model content
The purpose of the utility model is in order to address the above problem, and the OLT equipment of a kind of EPON of being used for system is provided, and this equipment adopts wavelength division multiplexing to descending respectively with up link, carries out long-distance transmissions by multimode fiber, has improved the utilance of resource greatly.
In order to achieve the above object, the technical scheme that the utility model provides is: the OLT equipment of a kind of EPON of being used for system, have terminal equipment, and also have optical receiver, optical transmitter, wave multiplexer, filter and branch light path device; Terminal equipment connects control optical receiver, optical transmitter; Optical receiver is accepted the signal of wave multiplexer through multimode fiber; Wave multiplexer accepts to divide the signal of light path device through monomode fiber; Divide the light path device to receive user's signal through optical network unit; Optical transmitter sends signal through multimode fiber and gives filter; Filter monomode fiber monomode fiber sends signal and gives optical transmitter; Divide the light path device to send signal and give the user's through optical network unit.
Optical network unit is a passive optical network unit.
Signalization amplifier between wave multiplexer and the branch light path device; Signalization amplifier between described filter and the optical transmitter.
Wave multiplexer, filter and branch light path device are wave multiplexer group, bank of filters and branch light path device group.
That the utility model OLT output is taked is up, downlink transfer adopts wave division multiplex mode respectively.Downlink optical signal is transmitted by multimode fiber, through one group N WDM demultiplexing single-mode optics, each road single-mode optics signal again through the passive splitting network beam split of traditional ODN to the M road ONU, be transferred to the family.So just realized that a local side downlink optical signal can transfer to M * N ONU end, has improved transmittability; And uplink optical signal at first transfers to after the ODN network closes ripple through traditional ONU; Through N road monomode fiber, transfer to the optical coupler of OLT system of our company, close ripple through optical coupler and become one tunnel multimode signal; Set up by light-receiving and to convert the signal of telecommunication to, transfer to local local side OLT system.Like this, the signal of going has on the way transmitted M * N road ONU end signal, has improved uplink capacity; On the basis of original wavelength-division multiplex technique; Further adopt wavelength division multiplexing respectively with up link, carry out long-distance transmissions, improved the utilance of resource greatly by multimode fiber to descending; Efficiency of transmission has had raising greatly than traditional E PON system; Owing to do not change the structure of client ODN+ONU, thus can be on existing EPON system-based smooth upgrade, greatly reduce improvement cost; Realization is satisfied the demands of different of different clients on cost and function to the customization of control system.Compare with the built-in MPU of system, have stronger performance and the reliability of Geng Gao; Control system can be carried out the control of unified management and cluster simultaneously to many OLT equipment; Realization reduces the management of management cost and maintenance cost to the Long-distance Control of control system
Description of drawings:
Fig. 1: the sketch map of the utility model.
Embodiment:
As shown in Figure 1:
Plant the OLT equipment that is used for the EPON system, have terminal equipment 1, also have optical receiver 2, optical transmitter 3, wave multiplexer 4, filter 5 and branch light path device 6; Terminal equipment 1 connects control optical receiver 2, optical transmitter 3; Optical receiver 2 is accepted the signal of wave multiplexer 3 through multimode fiber; Wave multiplexer 3 accepts to divide the signal of light path device 5 through monomode fiber; Divide light path device 6 to receive user's signal through optical network unit; Optical transmitter 6 sends signal through multimode fiber and gives filter 5; Filter 5 sends signal through monomode fiber and gives optical transmitter 6; Divide light path device 6 to send signal and give the user's through optical network unit.
Optical network unit is a passive optical network unit.
Signalization amplifier 7 between wave multiplexer 4 and the branch light path device 6; Signalization amplifier 7 between described filter and the optical transmitter.
Wave multiplexer, filter and branch light path device are wave multiplexer group, bank of filters and branch light path device group.
That the utility model OLT output is taked is up, downlink transfer adopts wave division multiplex mode respectively.Downlink optical signal is transmitted by multimode fiber, through one group N WDM demultiplexing single-mode optics, each road single-mode optics signal again through the passive splitting network beam split of traditional ODN to the M road ONU, be transferred to the family.So just realized that a local side downlink optical signal can transfer to M * N ONU end, has improved transmittability; And uplink optical signal at first transfers to after the ODN network closes ripple through traditional ONU; Through N road monomode fiber, transfer to the optical coupler of OLT system of our company, close ripple through optical coupler and become one tunnel multimode signal; Set up by light-receiving and to convert the signal of telecommunication to, transfer to local local side OLT system.Like this, the signal of going has on the way transmitted M * N road ONU end signal, has improved uplink capacity; On the basis of original wavelength-division multiplex technique; Further adopt wavelength division multiplexing respectively with up link, carry out long-distance transmissions, improved the utilance of resource greatly by multimode fiber to descending; Efficiency of transmission has had raising greatly than traditional E PON system; Owing to do not change the structure of client ODN+ONU, thus can be on existing EPON system-based smooth upgrade, greatly reduce improvement cost; Realization is satisfied the demands of different of different clients on cost and function to the customization of control system.Compare with the built-in MPU of system, have stronger performance and the reliability of Geng Gao; Control system can be carried out the control of unified management and cluster simultaneously to many OLT equipment; Realization reduces the management of management cost and maintenance cost to the Long-distance Control of control system
Obviously, the foregoing description of the utility model only be for explain clearly that the utility model does for example, and be not to be qualification to the execution mode of the utility model.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all execution modes.And conspicuous variation that these spirit that belong to the utility model are extended out or change still are among the protection range of the utility model.
Claims (4)
1. an OLT equipment that is used for the EPON system has terminal equipment, it is characterized in that: this OLT equipment that is used for the EPON system also has optical receiver, optical transmitter, wave multiplexer, filter and branch light path device; Described terminal equipment connects the described optical receiver of control, optical transmitter; Described optical receiver is accepted the signal of described wave multiplexer through multimode fiber; Described wave multiplexer is accepted the signal of described minute light path device through monomode fiber; Described minute light path device receives user's signal through optical network unit; Described optical transmitter sends signal through multimode fiber and gives filter; Described filter monomode fiber monomode fiber sends signal and gives optical transmitter; Described minute light path device sends signal through optical network unit and gives the user's.
2. the OLT equipment that is used for the EPON system according to claim 1 is characterized in that: described optical network unit is a passive optical network unit.
3. the OLT equipment that is used for the EPON system according to claim 1 is characterized in that: signalization amplifier between described wave multiplexer and the branch light path device; Signalization amplifier between described filter and the optical transmitter.
4. the OLT equipment that is used for the EPON system according to claim 1 is characterized in that: described wave multiplexer, filter and branch light path device are wave multiplexer group, bank of filters and branch light path device group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204305570U CN202268989U (en) | 2011-11-03 | 2011-11-03 | Optical line terminal (OLT) equipment applied to Ethernet passive optical network (EPON) system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204305570U CN202268989U (en) | 2011-11-03 | 2011-11-03 | Optical line terminal (OLT) equipment applied to Ethernet passive optical network (EPON) system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202268989U true CN202268989U (en) | 2012-06-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204305570U Expired - Fee Related CN202268989U (en) | 2011-11-03 | 2011-11-03 | Optical line terminal (OLT) equipment applied to Ethernet passive optical network (EPON) system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202268989U (en) |
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2011
- 2011-11-03 CN CN2011204305570U patent/CN202268989U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: OLT device for EPON system Effective date of registration: 20130427 Granted publication date: 20120606 Pledgee: Huaxia Bank Limited by Share Ltd Zhongguancun Beijing branch Pledgor: Beijing Zhongjing Sybo Technology Co., Ltd. Registration number: 2013990000249 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20141029 Granted publication date: 20120606 Pledgee: Huaxia Bank Limited by Share Ltd Zhongguancun Beijing branch Pledgor: Beijing Zhongjing Sybo Technology Co., Ltd. Registration number: 2013990000249 |
|
| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120606 Termination date: 20191103 |