The Cisco QDD-4X100G-FR-S is a QSFP-DD form factor transceiver designed by Cisco. It delivers 400 Gbps data transmission over single-mode fiber (SMF) using four 100-Gigabit lanes, operating at a wavelength of 1310 nm. The module connects via an MPO interface and supports link distances up to 2 km.

This transceiver works in QSFP-DD compliant ports on compatible network equipment that supports breakout into four separate 100G FR interfaces as defined by IEEE standards. Suitable for use with SMF cabling infrastructures, it enables high-density connections where shorter reach links are required within data centers or aggregation layers.

Cisco QDD-4X100G-FR-S: QSFP-DD Transceiver, 4x 100GBASE-FR1, MPO-12, 2km parallel SMF