CN210016465U - Optical fiber relay remote equipment - Google Patents
Optical fiber relay remote equipmentDownload PDFInfo
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- CN210016465U CN210016465UCN201921372447.6UCN201921372447UCN210016465UCN 210016465 UCN210016465 UCN 210016465UCN 201921372447 UCN201921372447 UCN 201921372447UCN 210016465 UCN210016465 UCN 210016465U
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- 230000003287optical effectEffects0.000claimsabstractdescription135
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- 238000003199nucleic acid amplification methodMethods0.000claimsdescription10
- 230000002457bidirectional effectEffects0.000claimsdescription9
- 238000001514detection methodMethods0.000claimsdescription9
- 238000001914filtrationMethods0.000claimsdescription8
- 239000000835fiberSubstances0.000claims1
- 238000004891communicationMethods0.000abstractdescription7
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- 230000008054signal transmissionEffects0.000abstract1
- 238000010586diagramMethods0.000description8
- 230000005540biological transmissionEffects0.000description7
- 238000002955isolationMethods0.000description2
- 230000035945sensitivityEffects0.000description2
- 230000009286beneficial effectEffects0.000description1
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- 238000012423maintenanceMethods0.000description1
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Abstract
Description
Technical Field
The utility model relates to a communication equipment technical field especially relates to an optical fiber relay equipment of zooming out.
Background
The farthest communication distance of a 1W interphone sold in the market is 5KM, and the communication distance of the interphone in urban environment is far less than 5 KM. For environments such as high buildings, large-scale venues and the like, due to the loss of the feeder line, the power divider coupler and other device subsystems, radio-frequency signals cannot effectively cover each area of the building, and the communication quality of partial areas in the building is not ideal; the interphone is directly communicated, limited by the transmitting power and receiving sensitivity of a terminal, the communication distance is very limited, and a large building has large wall loss, so that a conventional indoor distribution system still cannot meet the coverage requirement under the condition of large-area coverage; meanwhile, a large number of base stations can meet the communication requirements of public security, fire protection and property industry on high-rise buildings and large stadiums, but the investment for building the base stations is large, the building period is long, and the method is not cost-effective for application scenes with small telephone traffic.
Disclosure of Invention
In order to solve the technical problem, the utility model provides an optical fiber relay equipment of zooming out.
The utility model provides a technical problem can adopt following technical scheme to realize:
an optical fiber relay pulling apparatus, comprising:
the optical fiber relay remote near-end machine is connected with a base station and used for receiving forward signals of the base station;
the optical fiber relay remote near-end machine comprises a first duplexer, a first power amplifier, a second power amplifier, a first monitoring board and a first optical module;
the optical fiber relay remote-end machine is connected with the optical fiber relay remote-end machine through an optical cable, and the optical fiber relay remote-end machine is connected with a retransmission antenna;
the optical fiber relay remote machine comprises a second duplexer, a third power amplifier, a low noise amplifier, a second monitoring board and a second optical module.
Preferably, an output end of the first duplexer is connected to an input end of the first power amplifier, and an input end of the first duplexer is connected to an output end of the second power amplifier; the first monitoring board is in bidirectional signal connection with the first optical module, the first power amplifier and the second power amplifier, an input end of the first optical module is connected with an output end of the first power amplifier, and an output end of the first optical module is connected with an input end of the second power amplifier.
Preferably, the first optical module is connected to the second optical module, and the second monitoring board is in bidirectional signal connection with the third power amplifier, the low noise amplifier, and the second optical module; one output end of the second optical module is connected with one input end of the third power amplifier, and one input end of the second optical module is connected with one output end of the low noise amplifier; an output end of the third power amplifier is connected with an input end of the second duplexer, and an input end of the low-noise amplifier is connected with an output end of the second duplexer; the second duplexer is bidirectionally signal-connected to the retransmission antenna.
Preferably, the base station forward signal is sent to the first duplexer through a coupler, and an output signal of the first duplexer is driven, amplified and input to the first optical module through the first power amplifier; the first optical module combines a received first amplified signal with a first monitoring signal output by the first monitoring board, and sends the combined signal into the optical module to be modulated into a first optical signal, and the first optical signal is transmitted through the optical cable.
Preferably, the second optical module receives the first optical signal, demodulates the first optical signal into a first radio frequency signal through the second optical module, inputs the first radio frequency signal to the third power amplifier, and the second duplexer receives a third amplified signal output by the third power amplifier, filters the third amplified signal, and transmits the signal through the retransmission antenna; after the second optical module demodulates the optical signal, the optical signal is sent to the third power amplifier to be amplified and separated from the first monitoring signal, and the second optical module transmits the first monitoring signal to a far end.
Preferably, the retransmission antenna receives a signal transmitted by an intercom, inputs the signal transmitted by the intercom to a second duplexer for filtering, the low noise amplifier receives a filtered signal output by the second duplexer and amplifies the filtered signal, and the second optical module receives, combines and amplifies the filtered signal and a second monitoring signal output by the second monitoring board, and sends the filtered signal and the second monitoring signal to the second optical module to modulate the second optical signal.
Preferably, the first optical module receives the second optical signal, demodulates the second optical signal into a second radio frequency signal, inputs the second radio frequency signal to the second power amplifier, and the first duplexer receives a second amplified signal output by the second power amplifier, filters the second amplified signal, and outputs the second amplified signal to the base station through the coupler; and the first optical module separates the second monitoring signal in the second radio frequency signal and outputs the second monitoring signal to the first monitoring board.
Preferably, the first power amplifier, the second power amplifier, and the third power amplifier are of the same power amplifier structure, and the power amplifier includes:
the first voltage-controlled attenuator is connected with the input end of a first amplifying tube and is used for controlling the output frequency of the first power amplifier;
the first digital control attenuator is connected with the output end of the first amplifying tube and is used for adjusting the gain of the first power amplifier;
the first radio frequency acoustic meter is connected with the input end of the first numerical control attenuator and is used for filtering out-of-band spurious signals;
the resistance attenuation network is connected with the output end of the first radio frequency acoustic meter and is used for controlling the attenuation of the power signal;
the push amplifier is connected with the output end of the resistance attenuation network and is used for amplifying a first signal;
the final-stage amplifying tube is connected with the output end of the push amplifier and is used for amplifying a second signal;
a first detection circuit connected to the output of the final amplifier for detecting the output frequency;
the isolator is connected with the output end of the final amplifier and is used for isolating and detecting the reflection link;
and the second detection circuit is connected with the isolator and used for detecting the reflected power.
Preferably, the low noise amplifier includes: the low-noise amplifier tube, the second voltage-controlled attenuator, the second digital controlled attenuator, the second radio frequency sound meter, the second amplifier tube and the third detection circuit, wherein the output end of the low-noise amplifier tube is connected with the input end of the second voltage-controlled attenuator, the input end of the second digital controlled attenuator is connected with the output end of the second voltage-controlled attenuator and the input end of the second radio frequency sound meter, and the input end of the second amplifier tube is connected with the output end of the second radio frequency sound meter and the input end of the third detection circuit.
Preferably, the first optical module and the second optical module use the same optical module structure, and the optical module includes:
the third voltage-controlled attenuator is connected with the input end of the first radio frequency amplification module and receives an electric signal;
the third laser is connected with the output end of the first radio frequency amplification module and the output end of the FSK modulation chip and is connected with the input end of a wavelength division multiplexer through an optical fiber, the third laser is used for modulating the electric signal into a third optical signal, and the wavelength division multiplexer is used for combining and splitting the third optical signal and a third monitoring signal;
a third detector, an input end of which is connected to the wavelength division multiplexer through the optical fiber, and is configured to demodulate the third optical signal into the electrical signal;
the second radio frequency amplification module is connected with the output end of the third detector, the input end of a third numerical control attenuator and the input end of the FSK modulation chip, and the FSK modulation chip is used for transmitting the third monitoring signal;
the third radio frequency amplification module is connected with the output end of the third numerical control attenuator and outputs signals;
and the main control chip is in bidirectional signal connection with the FSK modulation chip and is connected with and controls the third voltage-controlled attenuator, the third numerical control attenuator, the third laser and the third detector.
The beneficial effects are that: the utility model discloses have with low costs, the fast advantage of construction for the basic station, and quick, economic solution public security, fire control and property are to the internal signal cover demand of high-rise building and large-scale venue, because optical fiber loss is little, are fit for long distance transmission simultaneously.
Drawings
Fig. 1 is a working schematic diagram of the optical fiber relay remote device provided by the present invention;
fig. 2 is a radio frequency link diagram of a power amplifier provided by the present invention;
fig. 3 is a radio frequency schematic block diagram of a low noise amplifier provided by the present invention;
fig. 4 is a schematic block diagram of an optical module provided by the present invention;
FIG. 5 is a prior art embodiment overlay;
fig. 6 is an overlay of an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.
Fig. 1 is a working schematic diagram of the optical fiber relay remote device provided by the present invention; 1. an optical fiber relay pulling apparatus, comprising: the system comprises an optical fiber relay remote near-end machine and an optical fiber relay remote far-end machine, wherein the optical fiber relay remote near-end machine is connected with a base station 1 and is used for receiving a forward signal of the base station 1;
the optical fiber relay remote near-end machine comprises a first duplexer 2, a first power amplifier 3, a second power amplifier 5, a first monitoring board 4 and a first optical module 6;
the optical fiber relay remote far-end machine is connected with the optical fiber relay remote near-end machine through an optical cable, and the optical fiber relay remote far-end machine is connected with a retransmission antenna 12;
the remote optical fiber relay terminal comprises: the second duplexer 11, the third power amplifier 9, the low noise amplifier 10, the second monitor board 8 and the second optical module 7.
Furthermore, an output end of the first duplexer 2 is connected to an input end of the first power amplifier 3, and an input end of the first duplexer 2 is connected to an output end of the second power amplifier 5; the first monitoring board 4 is in bidirectional signal connection with the first optical module 6, the first power amplifier 3 and the second power amplifier 5, an input end of the first optical module 6 is connected with an output end of the first power amplifier 3, and an output end of the first optical module 6 is connected with an input end of the second power amplifier 5.
Further, the first optical module 6 is connected with the second optical module 7, and the second monitoring board 8 is in bidirectional signal connection with the third power amplifier 9, the low noise amplifier 10 and the second optical module 7; an output end of the second optical module 7 is connected with an input end of the third power amplifier 9, and an input end of the second optical module 7 is connected with an output end of the low noise amplifier 9; an output end of the third power amplifier 9 is connected with an input end of the second duplexer 11, and an input end of the low-noise amplifier 9 is connected with an output end of the second duplexer 11; the second duplexer 11 is bidirectionally signal-connected to the retransmission antenna 12.
Further, a forward signal of the base station 1 is sent to the first duplexer 2 through the coupler, and an output signal of the first duplexer 2 is driven, amplified and input to the first optical module 6 through the first power amplifier 3; the first optical module 6 combines the received first amplified signal with the first monitoring signal output by the first monitoring board 4, and sends the combined signal to the first optical module 6 to be modulated into a first optical signal.
Further, the second optical module 7 receives the first optical signal, demodulates the first optical signal into a first radio frequency signal through the second optical module 7, inputs the first radio frequency signal to the third power amplifier 9, and the second duplexer 11 receives a third amplified signal output by the third power amplifier 9, filters the third amplified signal, and transmits the signal through the retransmission antenna 12; after the second optical module 7 demodulates the optical signal, the optical signal is sent to the third power amplifier 9 to be amplified and separated from the first monitoring signal, and the second optical module 7 transmits the first monitoring signal to a far end.
Specifically, a forward signal of the base station 1 is sent to a near-end machine through a coupler, amplified by a driving module, then enters an optical transmission integrated module, is combined with a monitoring signal in the module, then is sent to a first laser to be modulated into an optical signal, and is transmitted in a long distance through an optical fiber; the optical transmission integrated module in the remote machine demodulates the optical signal in the optical fiber through the second detector, the optical signal is amplified and then sent to the third power amplifier 9, the monitoring signal is separated, the monitoring signal is sent to the remote main monitoring disc through the optical transmission integrated module, the radio frequency signal enters the duplex filter for filtering after being amplified through the power amplifier, and finally the radio frequency signal is sent out of the whole machine through the retransmission antenna 12.
Further, the retransmission antenna 12 receives a signal transmitted by the intercom, and inputs the signal transmitted by the intercom to the second duplexer 11 for filtering, the low noise amplifier 10 receives a filtered signal output by the second duplexer 11 and amplifies the filtered signal, and the second optical module 7 receives and combines the amplified filtered signal and the second monitoring signal output by the second monitoring board 8, and sends the filtered signal and the second monitoring signal to the second optical module 7 to modulate the second optical signal.
Further, the first optical module 6 receives the second optical signal and demodulates the second optical signal into a second radio frequency signal, which is input to the second power amplifier 6, and the first duplexer 2 receives a second amplified signal output by the second power amplifier 5, filters the second amplified signal, and outputs the second amplified signal to the base station through the coupler; the first optical module 6 separates a second monitoring signal in the second radio frequency signal and outputs the second monitoring signal to the first monitoring board 4.
Specifically, the first optical module 6 includes a first detector and a first laser, the second optical module 7 includes a second detector and a second laser, a signal transmitted by the interphone is received by a retransmission antenna 12 of the far-end unit, then enters a duplex filter for filtering, enters the optical transmission integrated module after being amplified by a low noise amplifier 10, is combined with a monitoring signal of the far-end unit in the module and then is sent to the second laser to be modulated into an optical signal, after being transmitted by an optical fiber, the optical signal is demodulated into a radio frequency signal by the first detector of the near-end unit optical transmission integrated module, then the monitoring signal is separated out and sent to a near-end monitoring panel, and the separated radio frequency signal enters the base station 1 through the coupler after being amplified by the driving module.
Referring to fig. 2, the utility model provides a power amplifier radio frequency link diagram, first power amplifier 3, second power amplifier 5, third power amplifier 9 adopt same power amplifier structure power amplifier to include:
a first voltage-controlled attenuator 13 connected to the input end of afirst amplifier tube 14 for controlling the output frequency of the power amplifier 3;
the first numerical control attenuator 15 is connected with the output end of thefirst amplifying tube 14 and is used for adjusting the gain of the power amplifier 3;
the first radiofrequency sound meter 16 is connected with the input end of the first numerical control attenuator 15 and is used for filtering out-of-band stray signals;
theresistance attenuation network 17 is connected with the output end of the first radio frequencyacoustic meter 16 and is used for controlling the attenuation of the power signal;
apush amplifier 18 connected to the output end of theresistance attenuation network 17 for amplifying the first signal;
afinal amplifier tube 19 connected to the output end of thepush amplifier 18 for amplifying the second signal;
a first detector circuit 20 connected to the output of thefinal amplifier 19 for detecting the output frequency;
anisolator 38 connected to the output of thefinal amplifier 19 for isolation and detection of the reflection link;
a second detector circuit 21 connected to theisolator 38 for detecting the reflected power.
Referring to fig. 3, the present invention provides a radio frequency schematic block diagram of a low noise amplifier, the low noise amplifier includes: the low noise amplifier tube 22, the second voltage-controlled attenuator 23, the second digital controlled attenuator 24, the second radio frequency sound meter 25, the second amplifier tube 6 and the third detector circuit 27, the output end of the low noise amplifier tube 22 is connected with the input end of the second voltage-controlled attenuator 23, the input end of the second digital controlled attenuator 24 is connected with the output end of the second voltage-controlled attenuator 23 and the input end of the second radio frequency sound meter 25, and the input end of the second amplifier tube 26 is connected with the output end of the second radio frequency sound meter 25 and the input end of the third detector circuit 27.
Fig. 4 is the utility model provides an optical module schematic block diagram, first optical module 6, second optical module 7 adopt same optical module structure the optical module includes:
a third voltage-controlled attenuator 28, connected to an input terminal of the first rf amplifying module 28 and receiving an electrical signal;
a third laser 30 connected to the output end of the first rf amplifying module 29 and the output end of an FSK modulation chip 31, and the input end of the third laser 32 is connected to the input end of the optical fiber-wavelength division multiplexer 33, the third laser 33 is configured to modulate the electrical signal into a third optical signal, and the wavelength division multiplexer 32 is configured to combine and branch the third optical signal with a third monitoring signal;
a third detector 33, the input end of the third detector 33 is connected to the wavelength division multiplexer 32 through an optical fiber, and is used for demodulating the third optical signal into an electrical signal;
the second radio frequency amplification module 34 is connected with the output end of the third detector 33, the input end of a third numerical control attenuator 35 and the input end of the FSK modulation chip 31, and the FSK modulation chip 31 is used for transmitting a third monitoring signal;
a third radio frequency amplification module 36, which is connected with the output end of the third numerical control attenuator 35 and outputs signals;
and the main control chip 37 is in bidirectional signal connection with the FSK modulation chip 31 and is connected with and controls the third voltage-controlled attenuator 28, the third numerical-controlled attenuator 35, the third laser 30 and the third detector 33.
Referring to fig. 6, compared with the embodiment coverage of fig. 5, the optical module of the present invention has a high-sensitivity photoelectric conversion function, and ensures smooth transmission and demodulation of optical signals; the power amplifier has the characteristics of high gain and high linearity, and ensures that a downlink output signal is not distorted; the low noise amplifier 10 has the characteristics of high gain and low noise coefficient, and reduces the interference of equipment on the receiving sensitivity of a base station; the duplexer has the characteristics of high isolation and low insertion loss, and ensures that the equipment does not self-excite; the monitoring system has high reliability and can facilitate the operation and maintenance of the equipment by the client.
The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.
Claims (10)
1. An optical fiber relay pulling apparatus, comprising:
the optical fiber relay remote near-end machine is connected with a base station and used for receiving forward signals of the base station;
the optical fiber relay remote near-end machine comprises a first duplexer, a first power amplifier, a second power amplifier, a first monitoring board and a first optical module;
the optical fiber relay remote-end machine is connected with the optical fiber relay remote-end machine through an optical cable, and the optical fiber relay remote-end machine is connected with a retransmission antenna;
the optical fiber relay remote machine comprises a second duplexer, a third power amplifier, a low noise amplifier, a second monitoring board and a second optical module.
2. The apparatus of claim 1, wherein an output of the first duplexer is connected to an input of the first power amplifier, and an input of the first duplexer is connected to an output of the second power amplifier; the first monitoring board is in bidirectional signal connection with the first optical module, the first power amplifier and the second power amplifier, an input end of the first optical module is connected with an output end of the first power amplifier, and an output end of the first optical module is connected with an input end of the second power amplifier.
3. The fiber relay remote device according to claim 1, wherein the first optical module is connected to the second optical module, and the second monitor board is connected to the third power amplifier, the low noise amplifier, and the second optical module in a bidirectional signal manner; one output end of the second optical module is connected with one input end of the third power amplifier, and one input end of the second optical module is connected with one output end of the low noise amplifier; an output end of the third power amplifier is connected with an input end of the second duplexer, and an input end of the low-noise amplifier is connected with an output end of the second duplexer; the second duplexer is bidirectionally signal-connected to the retransmission antenna.
4. The optical fiber relay pulling-away equipment according to claim 1, wherein the base station forward signal is fed into the first duplexer through a coupler, and an output signal of the first duplexer is driven and amplified by the first power amplifier and input to the first optical module; the first optical module combines a received first amplified signal with a first monitoring signal output by the first monitoring board, and sends the combined signal into the optical module to be modulated into a first optical signal, and the first optical signal is transmitted through the optical cable.
5. The optical fiber remote repeater according to claim 4, wherein the second optical module receives the first optical signal, demodulates the first optical signal into a first radio frequency signal through the second optical module, inputs the first radio frequency signal to the third power amplifier, and the second duplexer receives a third amplified signal output by the third power amplifier, filters the third amplified signal, and transmits the signal through the retransmission antenna; after the second optical module demodulates the optical signal, the optical signal is sent to the third power amplifier to be amplified and separated from the first monitoring signal, and the second optical module transmits the first monitoring signal to a far end.
6. The optical fiber remote repeater according to claim 5, wherein the retransmission antenna receives a signal transmitted by an interphone, and inputs the signal transmitted by the interphone to a second duplexer for filtering, the low noise amplifier receives a filtered signal output by the second duplexer and amplifies the filtered signal, and the second optical module receives and combines the amplified filtered signal and a second monitor signal output by the second monitor board, and sends the filtered signal and the second monitor signal to the second optical module for modulation into a second optical signal.
7. The optical fiber remote repeater according to claim 6, wherein the first optical module receives the second optical signal and demodulates the second optical signal into a second radio frequency signal, and inputs the second radio frequency signal to the second power amplifier, and the first duplexer receives a second amplified signal output by the second power amplifier, filters the second amplified signal, and outputs the second amplified signal to the base station through the coupler; and the first optical module separates the second monitoring signal in the second radio frequency signal and outputs the second monitoring signal to the first monitoring board.
8. The optical fiber repeater according to claim 2, wherein the first power amplifier, the second power amplifier and the third power amplifier adopt the same power amplifier structure, and the power amplifier comprises:
the first voltage-controlled attenuator is connected with the input end of a first amplifying tube and is used for controlling the output frequency of the first power amplifier;
the first digital control attenuator is connected with the output end of the first amplifying tube and is used for adjusting the gain of the first power amplifier;
the first radio frequency acoustic meter is connected with the input end of the first numerical control attenuator and is used for filtering out-of-band spurious signals;
the resistance attenuation network is connected with the output end of the first radio frequency acoustic meter and is used for controlling the attenuation of the power signal;
the push amplifier is connected with the output end of the resistance attenuation network and is used for amplifying a first signal;
the final-stage amplifying tube is connected with the output end of the push amplifier and is used for amplifying a second signal;
a first detection circuit connected to the output of the final amplifier for detecting the output frequency;
the isolator is connected with the output end of the final amplifier and is used for isolating and detecting the reflection link;
and the second detection circuit is connected with the isolator and used for detecting the reflected power.
9. The optical fiber repeater device according to claim 3, wherein the low noise amplifier comprises: the low-noise amplifier tube, the second voltage-controlled attenuator, the second digital controlled attenuator, the second radio frequency sound meter, the second amplifier tube and the third detection circuit, wherein the output end of the low-noise amplifier tube is connected with the input end of the second voltage-controlled attenuator, the input end of the second digital controlled attenuator is connected with the output end of the second voltage-controlled attenuator and the input end of the second radio frequency sound meter, and the input end of the second amplifier tube is connected with the output end of the second radio frequency sound meter and the input end of the third detection circuit.
10. The optical fiber relay remote device according to claim 7, wherein the first optical module and the second optical module adopt the same optical module structure, and the optical module includes:
the third voltage-controlled attenuator is connected with the input end of the first radio frequency amplification module and receives an electric signal;
the third laser is connected with the output end of the first radio frequency amplification module and the output end of the FSK modulation chip and is connected with the input end of a wavelength division multiplexer through an optical fiber, the third laser is used for modulating the electric signal into a third optical signal, and the wavelength division multiplexer is used for combining and splitting the third optical signal and a third monitoring signal;
a third detector, an input end of which is connected to the wavelength division multiplexer through the optical fiber, and is configured to demodulate the third optical signal into the electrical signal;
the second radio frequency amplification module is connected with the output end of the third detector, the input end of a third numerical control attenuator and the input end of the FSK modulation chip, and the FSK modulation chip is used for transmitting the third monitoring signal;
the third radio frequency amplification module is connected with the output end of the third numerical control attenuator and outputs signals;
and the main control chip is in bidirectional signal connection with the FSK modulation chip and is connected with and controls the third voltage-controlled attenuator, the third numerical control attenuator, the third laser and the third detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921372447.6UCN210016465U (en) | 2019-08-22 | 2019-08-22 | Optical fiber relay remote equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921372447.6UCN210016465U (en) | 2019-08-22 | 2019-08-22 | Optical fiber relay remote equipment |
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| Publication Number | Publication Date |
|---|---|
| CN210016465Utrue CN210016465U (en) | 2020-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201921372447.6UActiveCN210016465U (en) | 2019-08-22 | 2019-08-22 | Optical fiber relay remote equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445543A (en)* | 2019-08-22 | 2019-11-12 | 和源通信（上海）股份有限公司 | A kind of Optical fiber relay remote device |
- 2019
- 2019-08-22CNCN201921372447.6Upatent/CN210016465U/enactiveActive
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110445543A (en)* | 2019-08-22 | 2019-11-12 | 和源通信（上海）股份有限公司 | A kind of Optical fiber relay remote device |
| CN110445543B (en)* | 2019-08-22 | 2024-12-06 | 和源通信（上海）股份有限公司 | Optical fiber relay extension equipment |
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