Dell 407-BCBF Compatible 25GBASE-SR SFP28 Intel Customer Kit for PowerEdge Servers

EdgeOptic's 407-BCBF compatible is a Dell-coded 25GBASE-SR SFP28 transceiver built as a direct replacement for the Dell 407-BCBF Intel Customer Kit. It ships with Dell-recognized EEPROM so PowerEdge iDRAC and Intel 25GbE adapter firmware identify the optic as a native Dell part. Link-up and receive-optical-signal telemetry surface through the standard Intel driver stack rather than through any vendor-specific override.

Optical behavior is 25GBASE-SR per IEEE 802.3by Clause 112 over duplex multi-mode fiber: 100m on OM4 or OM5, 70m on OM3. Line signaling rate is 25.78125 Gbd, with dual-rate support from 8.5 to 25.78 Gbps for 10GBASE-SR downshift on mixed-speed infrastructure. Transmit power is -8.4 to +2.4 dBm, receive sensitivity -10.3 dBm, link budget 5.3 dB with host RS-FEC per IEEE 802.3by Clause 108. Duplex LC/UPC, DOM per SFF-8472, 0.3W typical power. Operating case temperature is 0 to 70 degrees Celsius.

407-BCBF is specifically labelled by Dell as the Intel Customer Kit SFP28 SR optic. It ships with PowerEdge server builds that carry Intel 25GbE adapters, anchored on the Intel XXV710 dual-port 25GbE controller family and the newer Intel E810-XXVDA2 and E810-XXVDA4 controllers. The Intel-adapter procurement path is distinct from the 407-BBXU Dell Networking switch-port optic (labelled No FEC and ordered against PowerSwitch line cards) and from the D2VX1 CTO SFP28 that ships with Mellanox ConnectX adapter builds.

Intel-driver validation is the practical concern with Intel 25GbE adapters. The Linux i40e driver handles XXV710-based adapters; the newer ice driver serves E810 controllers. Both drivers read SFP28 EEPROM through SFF-8472 and enforce vendor and part-number checks when the adapter is configured for strict optics validation. The Dell-coded EEPROM on 407-BCBF is formatted to match the expected vendor and part-number strings for the Intel adapter validation path. In environments with default driver settings, the module is accepted on the standard validation path. Administrators running custom hardened module-allowlist policies should verify the vendor and PN strings against their local policy before deployment.

On FEC, 407-BCBF does not carry the No FEC label that Dell attaches to 407-BBXU. The optical path is agnostic to FEC mode; FEC is a host-side configuration on the 25G MAC. On most 25G deployments involving Intel XXV710 or E810 and a PowerSwitch or other 25G top-of-rack, RS-FEC per IEEE 802.3by Clause 108 is the default path and is supported end to end. For deployments that require Clause 74 Base-R Firecode or no-FEC operation, FEC mode is set per port through the switch or adapter configuration; the 407-BCBF supports whichever mode the link partners negotiate.

DOM registers for transmit power, receive power, supply voltage, laser bias and module temperature surface through SFF-8472 access on iDRAC, through ethtool on the Intel driver stack, and through standard SFP28 EEPROM reads on any host. Every unit is factory-tested to the 25GBASE-SR optical specification per IEEE 802.3by Clause 112 before dispatch.

For volume pricing, Intel driver-allowlist validation samples, or a cross-reference against 407-BBXU and D2VX1 for mixed-procurement PowerEdge estates, contact our sales team and we will respond within one business day.