Fortinet FN-TRAN-QSFPDD-DR4 QSFP-DD Transceiver

500 m parallel single-mode optics

FN-TRAN-QSFPDD-DR4 is Fortinet's 400 GE QSFP-DD module for a four-channel parallel single-mode fiber link up to 500 m. The exact order uses an MPO-12 connector and a published wavelength of 1310 nm.

Specify the fiber route before selecting the module

The DR4 interface uses parallel single-mode fiber. Preserve the fiber type, connector format and required route length in the bill of materials; a duplex-LC FR4 module or a multimode SR8 module describes a different optical interface. A matching QSFP-DD cage alone is insufficient to establish an end-to-end link.

Distinguish the base DR4 from DR4+

Fortinet lists FN-TRAN-QSFPDD-DR4 at 500 m, while FN-TRAN-QSFPDD-DR4+ is the separate 2 km order. Do not remove the plus sign during product matching or substitute the extended-reach item without checking the approved link design. The DR4 specification lists power dissipation below 12 W and an operating range of 0°C to 70°C.

Prepare link acceptance

Record the host platform, supported software and optical mode at each endpoint. Check the installed cable's single-mode type and MPO termination, inspect and clean the connectors, then verify link state and error counters under the agreed traffic test. Published 400 GE identity and 500 m reach do not remove the need to confirm platform support and the actual optical route.

Fortinet Transceivers: exact specifications and ordering rows, pages 8 and 14