SFP28-25GSR-BCC | Dell Compatible 25GB Multi-Mode 100m (25GBASE-SR)

Q: Will this work in place of the Dell SFP28-25GSR?
A: Yes. The SFP28-25GSR-BCC is a plug-and-play replacement for the Dell SFP28-25GSR and its variant SKUs (407-BCHI, 407-BCBF, 407-BBXU). It shares the same SFP28 form factor, 25.78 Gbps data rate, 850nm wavelength, and 25GBASE-SR standard compliance, ensuring identical electrical and optical behaviour in Dell equipment.

Q: Which Dell platforms support this transceiver?
A: This transceiver is compatible with Dell networking switches and servers featuring SFP28 ports that support 25GBASE-SR optics. The module is MSA-compliant and will operate in any Dell platform with an SFP28 cage, provided the port is configured for 25G Ethernet and multi-mode fibre connectivity.

Q: What is the maximum reach difference between OM3 and OM4 fibre?
A: Over OM4 fibre (3500 MHz-km modal bandwidth), this module reaches 100 meters. Over OM3 fibre (2000 MHz-km modal bandwidth), the reach is 70 meters. The difference is due to OM3 fibre having lower effective modal bandwidth at 850nm, which increases dispersion and limits the distance at 25.78 Gbps signalling rates.

Q: Does this transceiver require FEC to be enabled on the host port?
A: This module does not require Forward Error Correction (FEC) for standard reach links up to 100m over OM4 or 70m over OM3. However, some Dell platforms may enable Base-R FEC or RS-FEC by default. The module supports both FEC and No-FEC operation modes as signalled by the host switch configuration.

Q: Can I access DDM parameters while the link is active?
A: Yes. The SFF-8472 digital diagnostic interface provides live access to five operating parameters via the I2C bus without disrupting the data path. You can read transmit optical power, receive optical power, laser bias current, supply voltage, and internal temperature in real time using Dell switch CLI commands or SNMP queries for link health assessment.