FAQs About FS 25G Transceivers

As data centers continue to grow and demand higher bandwidth to handle increasing amounts of data traffic, the need for faster networking solutions like 25G SFP28 modules becomes essential. Data center upgrades and expansions often drive the demand for higher-speed transceivers. Here is a list of FAQs about 25G SFP28 transceiver modules.

What is SFP28?

SFP28 stands for "Small Form-Factor Pluggable 28." It is a compact, hot-swappable transceiver module used in data communication and telecommunications networks. The "28" in SFP28 refers to the module's support for data rates of up to 25 gigabits per second (Gbps).

What are the advantages of 25G SFP28 modules?

25G modules offer a significant increase in bandwidth, making them a compelling choice for modern data centers and enterprise networks. Their advantages include a smooth upgrade path from 10G, cost efficiency compared to higher-speed alternatives, compatibility with existing fiber infrastructure, and support for industry standardization, ensuring interoperability. Additionally, 25G SFP28 modules play a crucial role in various applications such as cloud computing and 5G networks.

What types of 25G SFP28 transceivers are available in the market?

There are three types of 25G modules, namely: 25G dual-fiber bidirectional module such as SR, LR, ER, ESR, CSR, 25G BiDi (bidirectional) modules, and 25G CWDM and DWDM color optical modules. You can get more information from 25G SFP28 Transceiver Module Overview

What are the applications for different types of 25G transceivers?

Each type of module is optimized for specific network applications and distance requirements. Following are the specific applications of different types of modules:

• 25G SFP28 (SR、LR、ER、ESR、CSR、BIDI): They are mainly used for the interconnection of data center servers, switches and routers;

• 25G CWDM SFP28: It is used in 25G Ethernet switches, routers, network interface cards (NICs) and storage network equipment, and can well solve the 5G millimeter wave fronthaul problem at the current stage;

• 25G DWDM SFP28: It is used to meet the needs of 5G fronthaul services and is widely used in CPRI/eCPRI links on 25G Ethernet and single-mode SMF, where the wavelengths are tightly packed together to increase the bandwidth of the existing optical fiber network.

What are SR and LR?

SR is Short Reach, and generally refers to transceivers that operate over MMF up to a few 100 meters. LR is Long Reach, and generally refers to transceivers that operate over SMF at up to 10km.

What is a 25G SFP28 dual-rate module?

Dual rate supports two rate types. The 25G dual module rate can support both 10G and 25G rates, and rate switching can be performed on the supported device ports.

When is FEC needed for 25G SFP28?

FEC decreases the BER to 10(-1)(2). For 25G, RS-FEC is used when the pre-FEC BER is above 5×10(-5) and FC-FEC is used when the pre-FEC BER is above 10(-8).

What does “breakout” mode mean?

"Breakout" mode in networking refers to the ability of a high-speed network link, typically provided by a multi-lane interface like a high-speed optical fiber link, to be split into multiple lower-speed links. This is often done using breakout cables or modules.

How to handle interface alarm information?

First determine the alarm type, whether it is a "not supported", "unknown", "unqualified", etc. or a transmitting and receiving optical power alarm. If the first situation occurs, it is because the module is incompatible with the device and needs to be replaced with another compatible module; if the latter situation occurs, you need to check whether the module is faulty or there is a problem with the matching jumper.

Where can additional information about FS 25G SFP28 transceivers be found?

To learn more about the FS 25G module, see the FS 25G SFP28 transceivers.