FN-TRAN-SFP+ERI-BCC | Fortinet Compatible 10GB Single-Mode ER - 40km (10GBASE-ER) Rugged / Industrial

Q: Will this work in place of the Fortinet FN-TRAN-SFP+ERI?
A: Yes. This module is a direct replacement for the FN-TRAN-SFP+ERI. It shares the same SFP+ form factor, 10.3125 Gbps data rate, 1550nm wavelength, 40km reach, and IEEE 802.3ae 10GBASE-ER compliance. The module is plug-and-play in FortiGate and FortiSwitch systems with SFP+ slots and operates across the same -40°C to 85°C industrial temperature range.

Q: Which Fortinet platforms support this industrial-temperature 10GBASE-ER module?
A: This module is designed for Fortinet systems with SFP+ slots, including FortiGate firewalls and FortiSwitch models. The FN-TRAN-SFP+ERI is listed in the Fortinet Transceivers datasheet as compatible with systems supporting SFP+ slots. Confirm your specific platform supports 10GBASE-ER optics and SFP+ electrical specifications before deployment.

Q: Why is the 1550nm wavelength used for this 40km reach module instead of 1310nm?
A: The 1550nm wavelength operates in the low-loss window of single-mode fibre (attenuation around 0.2 dB/km versus 0.35 dB/km at 1310nm), which is critical for achieving 40km reach. Combined with an EML laser transmitter and higher link budget, 1550nm enables extended-reach 10GBASE-ER applications without inline amplification. The 10GBASE-LR standard uses 1310nm but is limited to 10km.

Q: Can this module operate in a standard commercial-temperature environment, or is the industrial range required?
A: This module will operate in standard data centre environments (0°C to 70°C) without issue. The industrial temperature range (-40°C to 85°C) is a design qualification that extends operational capability to outdoor cabinets, hardened enclosures, and uncontrolled equipment rooms. If your deployment is indoors and climate-controlled, the commercial-grade FN-TRAN-SFP+ER (0°C to 70°C) is an alternative.

Q: What is the typical link budget and receiver sensitivity for this 10GBASE-ER module?
A: 10GBASE-ER modules typically provide a link budget of around 15 dB, with transmit power in the range of -2 to +4 dBm and receiver sensitivity better than -15.8 dBm. This budget accommodates 40km of OS2 fibre (approximately 8 dB attenuation at 0.2 dB/km) plus connector losses, splice losses, and margin for fibre aging. Exact parameters depend on implementation, but the IEEE 802.3ae specification defines minimum performance thresholds.