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Precautions in the Application of 100g Optical Transceiver and the Differences

Ⅰ. Precautions in the application of 100G optical transceiver

The rise of 5G networks has brought about an increase in data traffic and rates, and the demand for optical module rates has also increased accordingly. The 5G fronthaul part will be upgraded from 10G to 25G, and the data center will be upgraded from 10G and 40G to 100G. The market demand for 100G optical transceiver will also increase significantly in the future.

100G QSFP28 optical transceiver is a high-speed optical module applied to 100G Ethernet. It adopts the package form of QSFP28 and is small in size. The QSFP28 optical module has four signal channels, and the maximum transmission rate of each signal channel is 28Gbps.

It has a variety of transmission distances to choose from. QSFP28 optical transceiver is used for EDR of InfiniBand system. EDR's QSFP28 optical transceivers have stricter performance requirements.

1. Application scenarios of QSFP28 optical transceiver: QSFP28 optical transceiver is mainly used in the 100G connection of core switches and core routers in data centers.

2. The common types of 100G optical modules: 100G QSFP28 optical transceiver, CFP4 optical transceiver, CFP2 optical transceiver, CFP optical transceiver, etc. The current mainstream 100G optical transceiver is the QSFP28 optical transceiver.

3. The operating temperature range of QSFP28 optical transceiver is: The operating temperature range of QSFP28 optical transceiver standard commercial products is 0℃-70℃.

As an optical module supplier, we remind you that the working temperature range of industrial grade products is -45℃-85℃. Commercial-grade products are generally used, and some data centers use products with an operating temperature range of 20°C-50°C to reduce costs.

Ⅱ. The difference between 100G QSFP28 and 100G CFP4 optical module

100G QSFP28 packaged optical transceivers are suitable for various transmission distances and application scenarios, mainly used in 100G Ethernet and EDRInfiniBand, and are an important part of 100G networks. It has the advantages of low power consumption, small size, and high port density, so it is favored by customers. However, the optical devices are concentrated and the heat dissipation is general. And we also have sfp28 module for sale.

The 100G CFP packaged optical transceiver has gone through CFP, CFP2, and today's CFP4 optical transceiver. The technology is mature and can support hot swap. However, its volume is larger than that of QSFP28 optical transceiver, and there are fewer categories, so it is not suitable for many application scenarios. 100G CFP4 optical transceiver has better heat dissipation than QSFP28 optical transceiver.

Protocol standards, mechanical dimensions, interface between MAC and PHY, control bus interface, and application range are all different.

CFP4 is specified by CFP MSA, and its size is slightly larger than QSFP28. The interface between the MAC and the PHY varies according to the application, and are controled and monitored by the MDIO interface. 100G CFP4 optical transceiver is generally used in access networks and metropolitan area networks.

The 100G QSFP28 optical transceiver is specified by IEEE, and its size is smaller than that of CFP4. It is one of the 100G transceivers with the highest integration level (CXP has a higher integration level). The interface between the MAC and the PHY is CAUI-4, and the control and monitoring are realized through the I2C interface, which is typically used in data centers.

Compatible Optical Transceiver

Equipment manufacturers of optical transceivers will encrypt their devices to varying degrees, also known as compatibility. Transceivers of a particular brand can only be used with devices of the same brand, and cannot be matched with other brand optical transceivers. Compatibility manufacturers need to conduct different compatibility adaptations on the optical transceivers. Whether or not they can perfectly solve compatibility issues is particularly important.

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