The SFP28 transceiver, compatible with Cisco SFP-25G-ER40-S, delivers 25GBase-ER throughput over a maximum distance of 40km through single-mode fiber (SMF). Utilizing a wavelength of 1310nm and an LC duplex connector, this transceiver offers a connectivity solution for 25GBASE Ethernet in applications such as 25G Ethernet, telecommunications, and data centers. Additionally, it ensures interoperability, establishing a foundation for future network upgrades. The module is fully compliant with the SFP28 MSA, CPRI, and eCPRI standards.

The 25G Ethernet standard, introduced by IEEE and IEEE-SA, aims to address the growing demands for high-speed traffic in large and medium-sized enterprise networks that the 10G Ethernet speed standard cannot meet, while also overcoming the challenges of the overly high speed standard of 100G Ethernet. The 25G Ethernet standard, defined by the IEEE 802.3by protocol, includes parameters for Medium Access Control (MAC) operating at 25Gb/s, as well as physical layer and management parameters. Based on the IEEE 802.3by standard, 25G Ethernet technology maximizes bandwidth and port density in data centers, achieving 100Gb data transmission through 25Gb/s single-channel physical layer technology.

Categorized by transmission distance, 25G SFP28 optical modules include SR optical modules, LR optical modules, and ER optical modules. The 25G SFP28 SR optical module is typically paired with OM4 multimode jumpers for short-distance transmission, with a maximum distance of not exceeding 100 meters. The 25G SFP28 LR and 25G SFP28 ER optical modules are usually paired with OS2 single-mode jumpers for long-distance transmission. The theoretical maximum transmission distance for the SFP28 LR optical module is 10 kilometers, while the SFP28 ER optical module can transmit up to 40 kilometers. Conventional 25G SFP28 optical modules are commonly used for interconnecting data center servers, switches, routers, and similar devices.

Specifications