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What are the differences among SFP, SFP+ and XFP?

SFP — hot-swappable small package module, the current maximum rate can reach 4G, mostly using LC interface

SFP+ —standard package, the working rate is 10G, which can meet the application of Ethernet 10G.

XFP —a standardized package of serial 10G optical transceiver module.

Advantages of SFP+ optical module:

1. SFP+ has a more compact size than X2 and XFP packages (the same size as SFP);

2. It can be directly connected with the same type of XFP, X2, XENPAK;

3. The cost is lower than XFP, X2, XENPAK products.

The difference between SFP and SFP+

1. SFP and SFP+ have the same appearance size;

2. The highest rate of SFP can reach 4G, and the rate of SFP+ is 10G;

3. SFP protocol specification: IEEE802.3, SFF-8472;

4. SFP+ supports digital diagnosis.

The difference between SFP+ and XFP

1. Both SFP+ and XFP are 10G optical fiber modules, and can communicate with other types of 10G modules;

2. SFP+ has a smaller appearance size than XFP;

3. Because of its smaller size, SFP+ moves the signal modulation function, serial/deserializer, MAC, clock and data recovery (CDR), and electronic dispersion compensation (EDC) functions from the module to the motherboard card;

4. XFP complies with the agreement: XFP MSA agreement;

5. SFP+ protocol: IEEE 802.3ae, SFF-8431, SFF-8432;

6. SFP+ is a more mainstream design;

7. SFP+ protocol specification: IEEE 802.3ae, SFF-8431, SFF-8432.



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