100G optical modules have long been commercially available. Why is 25G optical modules still preferred

In order to be able to handle the increasing data load, the industry's largest long-distance cloud enterprises have moved to 100G Ethernet architecture together with other core network data center operators. Most carriers, however, believe that for server connections, their workloads need only be progressively improved over 10G networks.

1. Data center

Rate when the server start from 10 g moved at a higher rate of the current 10 ge optical fiber and other basic components are already built, the upgrade, switch 40 ge will cause a lot of resources, and can't protect the original investment, but 25 10 ge ge is fully compatible with standard of related physical, can achieve fast switching, protection of the original investment.

Therefore, from the perspective of resource investment and cost, 25GE is the best choice for server upgrade. The optical interconnect products for the 25G server are 25G SFP28 optical module, 25G DAC high-speed cable, 25G AOC active optical cable.

Two, 5G base station

Whether a 5G base station uses a 25G optical module or a 100G optical module depends on the interface protocol. If the transmitted content is the same, the CPRI protocol has a good effect, but the rate of the optical module should be large enough. If the eCPRI protocol is used, the effect is slightly worse, but the optical module is cheap, and the rate can be low.

Different carriers use different protocols and have different data compression ratios. If CPRI is selected, the distortion is low and the effect is good. However, a higher-rate optical module is required. eCPRI supports a compression ratio of 1:10, and optical modules are relatively cheap. Therefore, 25G optical modules are preferred.

5 g the introduction of new business characteristics, the structure of the wireless access network and core network architecture for bearing technology such as change of a new round of rapid development provides opportunity, in terms of the data center, the existing 100 g standard network system is composed of four link, the bandwidth of every channel is 25 GBPS, help operators more easily to expand its data center.