FN-CABLE-SFP28-X-BCC | Fortinet Compatible SFP28 To SFP28 Copper Direct-Attach 25GBASE-CR1 Cable | 1 to 5M

Q: Will this work in place of the Fortinet FN-CABLE-SFP28-3?
A: Yes. This cable is a direct plug-and-play replacement for the FN-CABLE-SFP28-3. It meets the same 25GBASE-CR standard, SFP28 form factor, and 25 Gbps data rate specified by Fortinet. The cable will initialise correctly in Fortinet systems with SFP28 slots and operate identically to the OEM part.

Q: Which Fortinet platforms support this cable?
A: This cable is compatible with any Fortinet system that includes SFP28 slots and supports 25 Gigabit Ethernet. Fortinet's datasheet confirms these cables work across their product line wherever SFP28 interfaces are present. Verify your specific model has SFP28 ports rather than standard SFP+ (10G) ports.

Q: Does cable length affect FEC requirements on the host ports?
A: Yes. For 25GBASE-CR passive DAC cables, 1M and 2M lengths typically operate without FEC. The 3M length may require BASE-R FEC (also called FC-FEC) on some platforms for optimal bit error rate performance. The 5M length generally requires RS-FEC. Consult your switch documentation to enable the appropriate FEC mode if link errors occur.

Q: Can I mix different cable lengths on the same switch?
A: Yes. Each SFP28 port negotiates independently, and you can deploy 1M, 3M, and 5M cables simultaneously on the same switch. However, if your switch applies FEC settings globally rather than per-port, you may need to configure FEC to accommodate the longest cable in use. Check whether your platform supports per-port FEC configuration.

Q: What is the maximum safe bend radius during installation?
A: The minimum bend radius is 35 mm for this 30 AWG twinax cable. Bending tighter than 35 mm risks conductor damage and signal degradation, particularly at 25 Gbps where impedance discontinuities cause reflections. Use cable management arms and avoid sharp corners when routing through high-density patch panels or vertical cable managers.