CN108337095B - G.fast SFP module - Google Patents
G.fast SFP module Download PDFInfo
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- CN108337095B CN108337095B CN201810364971.2A CN201810364971A CN108337095B CN 108337095 B CN108337095 B CN 108337095B CN 201810364971 A CN201810364971 A CN 201810364971A CN 108337095 B CN108337095 B CN 108337095B
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- 238000001514 detection method Methods 0.000 claims description 10
- 238000003780 insertion Methods 0.000 claims description 10
- 230000037431 insertion Effects 0.000 claims description 10
- 238000004891 communication Methods 0.000 abstract description 27
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 10
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- 229910052802 copper Inorganic materials 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2869—Operational details of access network equipments
- H04L12/2878—Access multiplexer, e.g. DSLAM
- H04L12/2879—Access multiplexer, e.g. DSLAM characterised by the network type on the uplink side, i.e. towards the service provider network
- H04L12/2881—IP/Ethernet DSLAM
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2869—Operational details of access network equipments
- H04L12/2878—Access multiplexer, e.g. DSLAM
- H04L12/2879—Access multiplexer, e.g. DSLAM characterised by the network type on the uplink side, i.e. towards the service provider network
- H04L12/2885—Arrangements interfacing with optical systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
- H04Q1/028—Subscriber network interface devices
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Abstract
The invention discloses a G.fast SFP module, which comprises: twisted pair interface, analog front end, digital front end, SFP interface, PHY unit and POE interface; the analog signal input/output end of the analog front end is connected with the twisted pair interface, the digital signal input/output end of the analog front end is connected with the SERDES digital signal input/output end of the digital front end, the SFP interface and the Ethernet digital signal input/output end of the PHY unit are simultaneously connected with the Ethernet digital signal input/output end of the digital front end, and the Ethernet physical layer signal input/output end of the PHY unit is connected with the POE interface. The SFP G.fast module can support the communication of the G.fast technology, has SFP and SFU functions at the same time, and has strong universality.
Description
Technical Field
The invention relates to the field of communication, in particular to a G.fast SFP module.
Background
With the rapid development of network technology, the requirement of users on network transmission speed is also higher and higher, and the network access technology is the technology adopted on the last section of line connected with the users in the network, which has a vital meaning to the development of network technology.
At present, the small-sized SFP module is widely applied to Ethernet optical communication or passive optical network communication because of the characteristics of high performance, low cost, high transmission rate and the like, the SFP module provides connection between an optical fiber cable and a network switch, but the existing SFP module cannot be adapted to access a copper network cable interface, in addition, the existing SFP module is often accessed to an SFP host through the SFP interface so as to realize communication with the SFP host, and cannot support the access of a single household unit (Single Family Unit, SFU), so that the application of the SFP module is limited.
Disclosure of Invention
The embodiment of the invention provides a G.fast SFP module which can be adapted to be connected with a copper network cable interface, supports G.fast technical communication, has SFP and SFU functions, expands the functions of the SFP module and has strong universality.
The embodiment of the invention provides a G.fast SFP module, which comprises: twisted pair interface, G.fast processing unit, SFP interface, PHY unit and POE interface;
the G.fast processing unit comprises an analog front end and a digital front end, wherein the analog front end is provided with an analog signal input/output end and a digital signal input/output end, the digital front end is provided with a SERDES digital signal input/output end and an Ethernet digital signal input/output end, and the PHY unit is provided with an Ethernet digital signal input/output end and an Ethernet physical layer signal input/output end;
the analog signal input/output end of the analog front end is connected with the twisted pair interface, the digital signal input/output end of the analog front end is connected with the SERDES digital signal input/output end of the digital front end, the SFP interface and the Ethernet digital signal input/output end of the PHY unit are simultaneously connected with the Ethernet digital signal input/output end of the digital front end, and the Ethernet physical layer signal input/output end of the PHY unit is connected with the POE interface.
Further, the g.fast processing unit further includes a hybrid circuit, and an analog signal input/output terminal of the analog front end is connected to the twisted pair interface through the hybrid circuit.
Further, the digital signal input/output end of the analog front end is connected with the SERDES digital signal input/output end of the digital front end through a SERDES bus; the SFP interface is connected with the Ethernet digital signal input/output end of the digital front end through an SGMII bus, an IIC bus and a GPIO interface; the Ethernet digital signal input/output end of the PHY unit is connected with the Ethernet digital signal input/output end of the digital front end through an SGMII bus and an SMI interface.
Further, the g.fast SFP module includes a DC-DC converter and a PHY power switch, where a power input end of the DC-DC converter is connected to a power output pin of the POE interface, an enable control end of the DC-DC converter is connected to an SFP insertion detection pin of the SFP interface, and a power output end of the DC-DC converter is connected to a power input end of the g.fast processing unit and a first connection end of the PHY power switch at the same time; the power output pin of the SFP interface is connected with the power input end of the G.fast processing unit and the first connecting end of the PHY power switch at the same time; the second connecting end of the PHY power switch is connected with the power input end of the PHY unit, and the control end of the PHY power switch is connected with the SFP insertion detection pin of the SFP interface; the PHY power switch controls the on-off of the first connecting end and the second connecting end according to the level signal of the control end; when the DC-DC converter is disabled, the first connecting end and the second connecting end are in a disconnected state.
Further, the SFP insertion detection pin is a 20 th pin VeeT of the SFP interface.
Further, the PHY power switch comprises an N-type triode, a P-type MOS tube, a first resistor, a second resistor and a third resistor;
the base electrode of the N-type triode is the control end of the PHY power switch, the collector electrode of the N-type triode is connected with the grid electrode of the P-type MOS tube through the first resistor, and the emitter electrode of the N-type triode is grounded;
the source electrode of the P-type MOS tube is the first connecting end of the PHY power switch, the drain electrode of the P-type MOS tube is the second connecting end of the PHY power switch, the first end of the second resistor is connected with the source electrode of the P-type MOS tube, the second end of the second resistor is connected with the grid electrode of the P-type MOS tube, the first end of the third resistor is connected with the base electrode of the N-type triode, and the second end of the third resistor is connected with the second end of the second resistor.
Further, the twisted pair interface is an RJ11 interface or an RJ12 interface.
Further, the POE interface is an RJ45 interface.
Compared with the prior art, the G.fast SFP module provided by the embodiment of the invention enables the G.fast SFP module to support the communication of the G.fast technology by integrating the analog front end and the digital front end for processing the G.fast signal into the small SFP module; through design SFP interface and PHY unit and POE interface for the G.fast SFP module not only can be through SFP interface access SFP host computer, realize with the SFP host computer between the communication, still can be through POE interface access POE equipment, realize with the POE equipment between the communication, make the user can be according to the application scenario, with the G.fast SFP module access SFP host computer or POE equipment in realize the communication, overcome current SFP module can only access SFP host computer's limitation, the function of SFP module has been expanded, the commonality is strong.
Drawings
Fig. 1 is a schematic structural diagram of a g.fast SFP module according to a first embodiment of the present invention.
Fig. 2 is an application explanatory diagram of a g.fast SFP module accessing an SFP host according to a first embodiment of the present invention.
Fig. 3 is an application explanatory diagram of a g.fast SFP module access POE device according to the first embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a g.fast SFP module according to a second embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a PHY power switch according to a second embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the embodiment of the invention, a g.fast SFP module is provided, which supports g.fast ((Fast access to subscriberTerminals, fast access user terminal)) technical communication, and can access an SFP host and POE (Power Over Ethernet, active ethernet) equipment to realize communication between terminal equipment such as a PC, a mobile phone, a tablet computer and the like and a local side.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a g.fast SFP module according to a first embodiment of the present invention, where the g.fast SFP module includes: twisted pair interface 10, g.fast processing unit 20, SFP interface 30, PHY unit 40 and POE interface 50.
The g.fast processing unit 20 comprises a hybrid 201, an analog front end 202 and a digital front end 203. The analog front end 202 has an analog signal input/output a and a digital signal input/output b, the digital front end 203 has a SERDES digital signal input/output c and an ethernet digital signal input/output d, and the PHY unit 40 has an ethernet digital signal input/output e and an ethernet physical layer signal input/output f.
An analog signal input/output terminal a of the analog front end 202 is connected with the twisted pair interface 10 through a hybrid circuit 201, and a digital signal input/output terminal b of the analog front end 202 is connected with a SERDES digital signal input/output terminal c of the digital front end 203 through a SERDES bus; the SFP interface 30 is connected to the ethernet digital signal input/output terminal d of the digital front end 203 through an SGMII bus, an IIC bus and a GPIO interface, and the ethernet digital signal input/output terminal e of the PHY unit 40 is connected to the ethernet digital signal input/output terminal d of the digital front end 203 through an SGMII bus and an SMI interface; the ethernet physical layer signal input/output terminal f of the PHY unit 40 is connected to the POE interface 50.
The analog front end 202 is configured to convert a g.fast analog signal received by the twisted pair interface 10 into a g.fast digital signal or convert a g.fast digital signal transmitted by the digital front end 203 into a g.fast analog signal.
When the SFP interface 30 of the g.fast SFP module accesses the SFP host, the digital front-end 203 is configured to convert the g.fast digital signal transmitted from the analog front-end 202 into an ethernet digital signal or convert the ethernet digital signal transmitted from the SFP interface into the g.fast digital signal, so as to implement data communication between the g.fast SFP module and the SFP host.
When the POE interface 50 of the g.fast SFP module accesses POE equipment, the digital front end 203 is configured to convert the g.fast digital signal transmitted from the analog front end 202 into an ethernet digital signal or convert the ethernet digital signal transmitted from the PHY unit 40 into a g.fast digital signal; the PHY unit 40 is configured to convert an ethernet digital signal transmitted from the digital front end 203 into an ethernet physical layer digital signal or convert an ethernet physical layer digital signal transmitted from the POE interface 50 into an ethernet digital signal, so as to implement data communication between the g.fast SFP module and the POE device.
In this embodiment, the ethernet digital signal is a binary encoded signal carried by ethernet, and the ethernet physical layer signal is an ethernet encoded signal carried by ethernet.
In this embodiment, the twisted pair interface 10 is an RJ11 interface or an RJ12 interface, and the POE interface 50 is an RJ45 interface.
Referring to fig. 2, an application description schematic diagram of a g.fast SFP module accessing an SFP host according to a first embodiment of the present invention is shown.
The twisted pair interface 10 of the g.fast SFP module is connected to a office (DPU) through a telephone line, and the terminal device (such as a PC, a tablet computer, a mobile phone, etc.) is connected to the SFP host through a network line or a wireless lan. When the SFP interface 30 of the g.fast SFP module accesses the SFP host, communication between the terminal device and the office end can be realized, and the communication data flow direction is: terminal equipment SFP host G.fast SFP module local side.
Referring to fig. 3, an application description schematic diagram of a g.fast SFP module access POE device according to a first embodiment of the present invention is shown.
The twisted pair interface 10 of the g.fast SFP module is connected to a local side (DPU) through a telephone line, and a terminal device (such as a PC, a tablet computer, a mobile phone, etc.) is connected to POE device through a network line or a wireless lan. When the POE interface 50 of the g.fast SFP module is connected to the POE device, communication between the terminal device and the office end can be realized, and the flow direction of communication data is: terminal equipment < - > POE equipment < - > G.fast SFP module < - > local side.
Compared with the prior art, the G.fast SFP module provided by the embodiment of the invention enables the G.fast SFP module to support the G.fast technical communication by integrating the G.fast processing unit 20 in the small SFP module; by designing the SFP interface 30 and the PHY unit 40 and the POE interface 50, the G.fast SFP module can be connected with the SFP host through the SFP interface 30 to realize data communication with the SFP host, and can be connected with the POE device through the POE interface 50 to realize data communication with the POE device, so that a user can connect the G.fast SFP module into the SFP host or the POE device according to an application scene to realize communication, the limitation that the conventional SFP module can only be connected with the SFP host is overcome, the functions of the SFP module are expanded, and the universality is strong.
Fig. 4 is a schematic structural diagram of a g.fast SFP module according to a second embodiment of the present invention.
The present embodiment differs from the first embodiment in that: the g.fast SFP module of the present embodiment further includes a DC-DC converter 60 and a PHY power switch 70.
The power input end of the DC-DC converter 60 is connected to the power output pin of the POE interface 50, the enable control end of the DC-DC converter 60 is connected to the SFP insertion detection pin of the SFP interface 30, and the power output end of the DC-DC converter 60 is connected to the power input end of the g.fast processing unit 20 and the first connection end of the PHY power switch 70. The power output pin of the SFP interface 30 is connected to the g.fast processing unit 20 and the first connection terminal of the PHY power switch 70 at the same time to supply power to the analog front end and the digital front end of the g.fast processing unit 20. A second connection terminal of the PHY power switch 70 is connected to a power input terminal of the PHY unit 40, and a control terminal of the PHY power switch 70 is connected to an SFP insertion detection pin of the SFP interface 30. The DC-DC converter controls the DC-DC converter to be disabled or work according to the level signal received by the enabling control end of the DC-DC converter; the PHY power switch 70 controls the on-off of the first connection terminal and the second connection terminal according to the level signal of the control terminal. When the signal received by the enabling control unit of the DC-DC converter 60 is at a low level, the DC-DC converter 60 is controlled to be disabled, so that the DC-DC converter is not operated; when the signal received by the control terminal of the PHY power switch 70 is at a low level, the first connection terminal is controlled to be disconnected from the second connection terminal, i.e., the power supply to the PHY unit 40 is cut off, so that the PHY unit 40 does not operate.
In this embodiment, when the POE interface 50 of the g.fast SFP module accesses the POE device, the voltage provided by the POE device is converted into a voltage output of 3.3V through the power output pin of the POE interface 50 and the DC-DC converter 60, so as to power the PHY unit 40 and the g.fast processing unit 20, thereby implementing the SFU function of the g.fast SFP module. When the SFP interface 30 of the g.fast SFP module accesses the SFP host, the level of the SFP insertion detection pin is a low level, the enabling control end of the DC-DC converter 60 receives the low level, controls the DC-DC converter 60 to disable so that the DC-DC converter does not work, and at the same time, the control end of the PHY power switch 70 also receives the low level, controls the first connection end to disconnect from the second connection end, cuts off the power supply of the PHY unit, so that the power output end of the DC-DC converter 60 and the power output pin of the SFP interface 30 cannot supply power to the PHY unit 40, and only the SFP host can supply 3.3V voltage to the hybrid circuit, the analog front end and the digital front end of the g.fast SFP processing unit, so as to realize the SFP function of the g.fast SFP module. When the POE interface 50 of the g.fast SFP module is connected to the POE device and the SFP interface 30 is connected to the SFP host, the enable control terminal of the DC-DC converter 60 and the control terminal of the PHY power switch 70 will receive a low level, so as to control the DC-DC converter 60 to be disabled and the first connection terminal and the second connection terminal of the PHY power switch 70 to be disconnected, so that neither the power output terminal of the DC-DC converter 60 nor the power output pin of the SFP interface 30 can supply power to the PHY unit 40, nor the DC-DC converter 60 can supply power to the g.fast processing unit 20, thereby realizing the SFP function of the g.fast SFP module and effectively preventing signal crosstalk.
Fig. 5 is a schematic diagram of a PHY power switch 70 according to a second embodiment of the invention. The PHY power switch 70 includes an N-type transistor 701, a P-type MOS transistor 702, a first resistor 703, a second resistor 704, and a third resistor 705.
The base of the N-type triode 701 is the control end of the PHY power switch 70, the collector of the N-type triode 701 is connected with the gate of the P-type MOS tube 702 through the first resistor 703, and the emitter of the N-type triode 701 is grounded.
The source electrode of the P-type MOS transistor 702 is the first connection end of the PHY power switch 70, the drain electrode of the P-type MOS transistor 702 is the second connection end of the PHY power switch 70, the first end of the second resistor 704 is connected with the source electrode of the P-type MOS transistor 702, the second end of the second resistor 704 is connected with the gate electrode of the P-type MOS transistor 702, the first end of the third resistor 705 is connected with the base electrode of the N-type triode 701, and the second end of the third resistor 705 is connected with the second end of the second resistor 704.
In this embodiment, the SFP insertion detection pin is the 20 th pin VeeT of the SFP interface 30, and when the SFP interface 30 accesses the SFP host, the 20 th pin VeeT of the SFP interface 30 outputs a low level.
When the SFP interface 30 of the g.fast SFP module is connected to the SFP host, the 20 th pin VeeT of the SFP interface 30 outputs a low level, i.e. the base of the N-type triode 601 of the PHY power switch 70 is at a low level, at this time, the N-type triode 601 is turned off, and the gate of the P-type MOS tube is at a high level, so that the source and the drain of the P-type MOS tube are turned off, i.e. the power supply of the PHY unit 40 is cut off, and the PHY unit 40 does not work. In addition, the enabling control end of the DC-DC converter also receives the low level of the 30 th pin VeeT output of the SFP interface, so that the DC-DC converter does not work, namely the SFP host can only supply power for the hybrid circuit, the analog front end and the digital front end of the G.fast processing unit.
That is, when the SFP interface 30 of the g.fast SFP module is connected to the SFP host and the POE interface 50 is connected to the POE device, the DC-DC converter is disabled, and the PHY power switch 70 is turned off, thereby cutting off the power supply to the PHY unit 40, so that the PHY unit 40 does not operate, and it is ensured that the g.fast SFP module preferentially communicates with the SFP host when the g.fast SFP module is connected to both the SFP host and the POE device.
Compared with the prior art, the G.fast SFP module provided by the embodiment of the invention enables the G.fast SFP module to support the G.fast technical communication by integrating the G.fast processing unit 20 in the small SFP module; by designing the SFP interface 30 and the PHY unit 40 and the POE interface 50, the G.fast SFP module can be connected with the SFP host through the SFP interface 30 to realize communication with the SFP host, and can be connected with the POE device through the POE interface 50 to realize communication with the POE device, so that a user can connect the G.fast SFP module into the SFP host or the POE device according to an application scene to realize communication, the limitation that the existing SFP module can only be connected with the SFP host is overcome, the functions of the SFP module are expanded, the universality is strong, and when the G.fast SFP module is connected with the SFP host and the POE device simultaneously, the G.fast SFP module can be preferentially selected to communicate with the SFP host to realize the effectiveness of communication, and the signal crosstalk is prevented.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.
Claims (7)
1. A g.fast SFP module, the g.fast SFP module comprising: twisted pair interface, G.fast processing unit, SFP interface, PHY unit and POE interface;
the G.fast processing unit comprises an analog front end and a digital front end, wherein the analog front end is provided with an analog signal input/output end and a digital signal input/output end, the digital front end is provided with a SERDES digital signal input/output end and an Ethernet digital signal input/output end, and the PHY unit is provided with an Ethernet digital signal input/output end and an Ethernet physical layer signal input/output end;
the analog signal input/output end of the analog front end is connected with the twisted pair interface, the digital signal input/output end of the analog front end is connected with the SERDES digital signal input/output end of the digital front end, the SFP interface and the Ethernet digital signal input/output end of the PHY unit are simultaneously connected with the Ethernet digital signal input/output end of the digital front end, and the Ethernet physical layer signal input/output end of the PHY unit is connected with the POE interface;
the G.fast SFP module comprises a DC-DC converter and a PHY power switch, wherein the power input end of the DC-DC converter is connected with the power output pin of the POE interface, the enabling control end of the DC-DC converter is connected with the SFP insertion detection pin of the SFP interface, and the power output end of the DC-DC converter is simultaneously connected with the power input end of the G.fast processing unit and the first connecting end of the PHY power switch; the power output pin of the SFP interface is connected with the power input end of the G.fast processing unit and the first connecting end of the PHY power switch at the same time; the second connecting end of the PHY power switch is connected with the power input end of the PHY unit, and the control end of the PHY power switch is connected with the SFP insertion detection pin of the SFP interface; the PHY power switch controls the on-off of the first connecting end and the second connecting end according to the level signal of the control end; when the DC-DC converter is disabled, the first connecting end and the second connecting end are in a disconnected state.
2. The g.fast SFP module of claim 1, wherein: the G.fast processing unit also comprises a hybrid circuit, and an analog signal input/output end of the analog front end is connected with the twisted pair interface through the hybrid circuit.
3. The g.fast SFP module of claim 1, wherein: the digital signal input/output end of the analog front end is connected with the SERDES digital signal input/output end of the digital front end through a SERDES bus; the SFP interface is connected with the Ethernet digital signal input/output end of the digital front end through an SGMII bus, an IIC bus and a GPIO interface; the Ethernet digital signal input/output end of the PHY unit is connected with the Ethernet digital signal input/output end of the digital front end through an SGMII bus and an SMI interface.
4. The g.fast SFP module of claim 1, wherein: the SFP insertion detection pin is the 20 th pin VeeT of the SFP interface.
5. The g.fast SFP module of claim 1, wherein:
the PHY power switch comprises an N-type triode, a P-type MOS tube, a first resistor, a second resistor and a third resistor;
the base electrode of the N-type triode is the control end of the PHY power switch, the collector electrode of the N-type triode is connected with the grid electrode of the P-type MOS tube through the first resistor, and the emitter electrode of the N-type triode is grounded;
the source electrode of the P-type MOS tube is the first connecting end of the PHY power switch, the drain electrode of the P-type MOS tube is the second connecting end of the PHY power switch, the first end of the second resistor is connected with the source electrode of the P-type MOS tube, the second end of the second resistor is connected with the grid electrode of the P-type MOS tube, the first end of the third resistor is connected with the base electrode of the N-type triode, and the second end of the third resistor is connected with the second end of the second resistor.
6. The g.fast SFP module of claim 1, wherein: the twisted pair interface is an RJ11 interface or an RJ12 interface.
7. The g.fast SFP module of claim 1, wherein: the POE interface is an RJ45 interface.
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| CN112602291B (en) * | 2018-08-27 | 2022-04-05 | 华为技术有限公司 | Communication device, system and method thereof |
| CN109660248B (en) * | 2018-12-11 | 2023-03-24 | 中山芯达电子科技有限公司 | High-precision Ethernet physical layer conversion circuit |
| TWI802287B (en) * | 2022-02-22 | 2023-05-11 | 佳必琪國際股份有限公司 | Small form-factor pluggable transceiver |
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