In today's Internet era, enterprise network deployment and data center construction are inseparable from optical modules and switches. The optical module is mainly used to convert electrical signals and optical signals, while the switch is used to transmit photoelectric signals. Among many optical modules, the SFP + optical module is one of the most widely used optical modules. Different connection modes can meet different network requirements when used with switches.
What is the optical module of SFP +?
As a kind of 10G Optical fiber module, it is independent of communication protocol. It is generally connected with switches, fiber routers, optical network cards, etc., and is applied in 10Gbps Ethernet and 8.5g BPS fibre channel system, which can meet the higher speed requirements of data center and realize the network expansion and conversion of data center.
Types of SFP + optical modules
Under normal circumstances, the optical modules of SFP + are classified according to the practical application. The common types are 10g SFP +, bidi SFP +, CWDM SFP +, DWDM SFP +.
10g SFP + optical module
This type of optical module is not only the ordinary SFP + optical module, but also can be regarded as the upgraded version of 10G SFP optical module, which is the mainstream design in the market at present.
Bidi SFP + optical module
This type of optical module adopts WDM technology, the rate can reach 11.1gbps, and the power consumption is low. It has two optical fiber jacks, which are usually used in pairs. When network construction is carried out in the data center, the use of optical fiber can be reduced and the construction cost can be reduced.
CWDM SFP + optical module
This kind of optical module adopts the technology of coarse wavelength division multiplexing, which is often used with single-mode fiber, which can save fiber resources, is more flexible and reliable in networking, and has low power consumption.
DWDM SFP + optical module
This kind of optical module adopts dense wavelength division multiplexing technology, which is mostly used in long-distance data transmission. The maximum transmission distance is up to 80km. It has the characteristics of high-speed, large capacity and strong expansibility.
The solution of the combination of optical module and switch
Different types of optical modules and switches can be used in different networking schemes. The following is a demonstration of the practical application scheme of the combination of the optical modules and the switch of the SFP +.
Scheme 1: connection between 10g SFP + 10G Optical module and switch
Insert four 10g SFP + optical modules into the 10 Gbps SFP + port of one switch, and then insert a 40g qsfp + optical module into the 40 Gbps qsfp + port of another switch, and finally connect with a branch fiber jumper in the middle.This connection mode mainly realizes the network expansion from 10g to 40g, which can quickly and easily meet the network upgrade requirements of the data center.
Scheme 2: connection between bidi SFP + 10 Gigabit single fiber bidirectional optical module and switch
The bidi optical modules are respectively inserted into the SFP + ports of the two switches, and then the optical modules on the two switches are connected by the LC optical fiber jumper corresponding to the optical module connection port.This is the simplest and most effective way to connect data in Telecom center.
Scheme 3: connection between CWDM SFP + 10 Gigabit optical module and switch
The trunk box, optical fiber transceiver and CWDM coarse wavelength division multiplexer are used to connect the CWDM SFP + optical module with the switch. The RJ45 port on the 10g 10 Gigabit Ethernet switch is converted to the CWDM wavelength required by the CWDM coarse wavelength division multiplexer.
Scheme 4: connection between DWDM SFP + 10 Gigabit optical module and switch
Insert the DWDM SFP + optical module into the switch's SMP + port, and then connect it with the DWDM dense wavelength division multiplexer with the armored fiber jumper. This connection mode realizes the protection of optical signal in long-distance transmission, which can reduce the optical wave loss to the greatest extent, and is suitable for long-distance optical signal transmission.
Notes on connection between optical module and switch
1. Pay attention to whether the wavelength and transmission distance of the optical modules used by the switches at both ends are the same, as well as the problems of single fiber, double fiber and single-mode multi-mode. If the two ends are not equal, the corresponding converter should be used;
2. When using the optical module, try to avoid static electricity and collision. If there is collision, it is not recommended to continue to use the optical module;
3. Pay attention to the positive and negative insertion of the optical module, and the pull ring and label should face upward;
4. When inserting the optical module into the switch, push it to the bottom as much as possible. Generally, there will be slight vibration. After inserting, the optical module can be pulled out gently to check whether it is installed in place;
5. When disassembling the optical module, the bracelet should be pulled to the position of 90 ° to the optical port, and then the optical module should be pulled out.
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