How To Use SFP+ Optical Modules With Switches? Four Ways Are Commonly Used!

- Oct 28, 2020-

Optical modules and switches are inseparable for enterprise network deployment and data center construction. Optical modules are mainly used to convert electrical and optical signals, while switches are used to forward photoelectric signals. Among the many optical modules, the SFP+ optical module is one of the most widely used optical modules. When used with switches, different connection methods can be used to achieve different network requirements.


1. What is SFP+ optical module


The SFP+ optical module is a 10G optical fiber module in the SFP optical module, which is independent of the communication protocol. Generally connected with switches, optical routers, optical network cards, etc., and used in 10G bps Ethernet and 8.5G bps fiber channel systems, it can meet the higher speed requirements of data centers and realize the network expansion and conversion of data centers.


The SFP+ optical module line card has high density and small size, and can communicate with other types of 10G modules, providing a higher installation density for data centers and saving costs. Therefore, it has become the mainstream pluggable optical module in the market.

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2. Types of SFP+ optical modules


Under normal circumstances, SFP+ optical modules are classified according to actual applications. Common types include 10G SFP+, BIDI SFP+, CWDM SFP+, and DWDM SFP+.


10G SFP+ optical module


This type of optical module is an ordinary SFP+ optical module, and can also be regarded as an upgraded version of a 10G SFP optical module, which is currently the mainstream design on the market.


BIDI SFP+ optical module


This type of optical module adopts wavelength division multiplexing technology, the rate can reach 11.1G bps, and the power consumption is low. It has two optical fiber jacks, which are generally used in pairs. When constructing a network in a data center, it can reduce the amount of optical fiber used and the construction cost.


CWDM SFP+ optical module


This kind of optical module adopts coarse wavelength division multiplexing technology, and is often used in conjunction with single-mode optical fiber, which can save optical fiber resources, and 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, with a transmission distance of up to 80km, and has the characteristics of high speed, large capacity, and strong scalability.


3. How to use SFP+ optical modules and switches together


Different types of optical modules are connected to switches and can be used in different networking solutions. Here are some practical application solutions for SFP+ optical modules and switches.


Solution 1: Connection between 10G SFP+ 10G optical module and switch


Insert 4 10G SFP+ optical modules into the 10-Gbps SFP+ port of one switch in turn, then insert a 40G QSFP+ optical module into the 40-Gbps QSFP+ port of another switch, and finally use a branch fiber jumper in the middle Make a connection.


This connection method mainly realizes the expansion of the network from 10G to 40G, which can quickly and easily meet the network upgrade requirements of the data center.

Solution 2: Connection between BIDI SFP+ 10G single-fiber bidirectional optical module and switch

Insert the optical modules into the SFP+ ports of the two switches respectively, and then use the LC fiber jumpers corresponding to the optical module connection ports to connect the optical modules on the two switches.


This connection method effectively realizes the simplest and most economical data connection, and can be applied to data centers, enterprise wiring, and Ethernet connections for telecom operation and transmission.