Spec score 7.6
QSFP56+, 400 Speed, Single-mode fiber, 1310 nm
+400 Gbps speed in QSFP-DD form factor
+Listed 1310 nm wavelength
+Cisco-compatible design with DOM monitoring
−Reach limited to 500 m
$7,200.00
as of 11/04/2026 06:06 PST - DetailsProduct details
Cisco QDD-400G-DR4-S Compatible 400GBASE-DR4 QSFP-DD PAM4 1310nm 500m DOM Transceiver Module (SMF, 1310nm, 500m,$7,200.00as of 11/04/2026 06:06 PST - Details
View on AmazonSpec score7.6
Pros
+400 Gbps speed in QSFP-DD form factor
+Listed 1310 nm wavelength
+Cisco-compatible design with DOM monitoring
Cons−Reach limited to 500 m
Compared with the 4 Network Transceivers on this page+400 speed: only 5 of 643 here have a higher speed
−500 reach or length: 303 of the 538 here have a higher reach or length
How pros and cons are picked (About: Disclaimer)

