Cisco QDD-400G-SR4.2-BD Compatible 400GBASE-SR4.2 QSFP-DD PAM4 850nm 100m DOM MPO-12/UPC MMF Optical Transceiver Module, Breakout to 4 x 100G-SR1.2
P/N: QDD-SR4.2-400G#199401
by M***a on 11/04/2024
It can be linked to QSFP112 or OSFP port NICs. It is ideal for short-range switch and NIC connecting scenarios because the NIC side is 4-channel and cannot be connected to the standard short-range 8-channel QDD-SR8-400G module.
by FS.com on 11/05/2024
by W***y on 11/04/2024
The transmission distance through parallel OM5 multimode fiber can reach 150m.
by FS.com on 11/05/2024
by C***e on 11/04/2024
The QDD-SR4.2-400G module and the QDD-SR4-400G module have the same form factor and are both short-distance 4-channel. However, the QDD-SR4-400G is equipped with the Maxlinear Chip, which can support 2 x 200G-SR and 4 x 100G-SR; the QDD-SR4.2-400G is equipped with the Inphi DSP Chip, which has two wavelengths per channel and can support 4× 100G-SR1.2, providing higher bandwidth efficiency.
by FS.com on 11/05/2024
Yes, all three types of modules use 4x100G PAM4 for the optical side modulation mode, and the QSFP-DD/OSFP/QSFP112 simply describes the module's physical form factor.
by FS.com on 11/04/2024
by D***t on 11/03/2024
It is not possible to use QSFP-DD optical modules, such as QDD-SR4.2-400G optical transceivers, in OSFP ports since OSFP and QSFP-DD have entirely distinct form factors.
by FS.com on 11/04/2024