SFP28-25GLR-BCC | Dell Compatible 10GB & 25GB Single-Mode 10km (25GBASE-LR)

Q: Will this work in place of the Dell SFP28-25GLR or 407-BBXZ?
A: Yes. This transceiver is fully compatible with Dell SFP28-25GLR and 407-BBXZ applications. It conforms to the same IEEE 802.3cc 25GBASE-LR standard, operates at 1310nm over single-mode fiber to 10km, uses the SFP28 form factor, and supports the same 25.78 Gbps data rate. It is plug-and-play in Dell SFP28 ports programmed for these OEM part numbers.

Q: Which Dell platforms support this transceiver?
A: This transceiver works in any Dell switch or server with SFP28 ports that accept 25GBASE-LR optics, including PowerEdge server series with SFP28 NICs and Dell networking switches supporting 25GbE. The port must provide SFP28 electrical and mechanical interface per MSA specification. Confirm your Dell platform documentation lists SFP28-25GLR or 407-BBXZ compatibility.

Q: What type of fiber is required and does the transceiver support dual-rate operation?
A: This module requires G.652 single-mode fiber (SMF) with duplex LC connectors. Maximum reach is 10km at 25.78 Gbps per IEEE 802.3cc. This is a single-rate 25GBASE-LR transceiver. It does not support 10G fallback. For dual 10G/25G operation over the same fiber infrastructure, a separate dual-rate 10/25GBASE-LR module is required.

Q: Can I monitor link performance and optical power budgets in real time?
A: Yes. The transceiver implements SFF-8472 Digital Diagnostic Monitoring (DDM/DOM). You can read transmit optical power, receive optical power, module temperature, laser bias current, and supply voltage via the I2C interface. These parameters help you measure link margin, detect degrading fiber, verify transmitter health, and predict failures before link loss occurs. Access methods depend on your Dell switch NOS and CLI or SNMP capabilities.

Q: Does this transceiver require Forward Error Correction (FEC) on the host port?
A: 25GBASE-LR at 10km over single-mode fiber does not mandate FEC per IEEE 802.3cc for standard applications. However, some Dell platforms may enable BASE-R FEC or RS-FEC by default on SFP28 ports. Check your switch configuration. For clean fiber links within the 10km specification, FEC is not required but can improve bit error rate margin if enabled. Confirm FEC settings match at both link ends to avoid negotiation issues.