The 200G cables can support backward compatibility. But generally speaking, whether the cable or transceiver module can be used depends on the device and the product itself.
by FS.com on 07/27/2022
1. QSFP56 and QSFP-DD are different form factors that describe transceivers that meet specific engineering requirements. 2. The QSFP56 module has four transmit and receive channels, each capable of 53.125 Gb/s operation which together yield an aggregate data rate of 200Gb/s. 3. The QSFP-DD optical transceiver is compliant with IEEE802.3bs and QSFP-DD MSA standards. QSFP-DD electrical interfaces employ eight lanes that each operate on up to 25 Gbps NRZ modulation or 50 Gbps PAM4 modulation, providing solutions up to 200 Gbps or 400 Gbps respectively. 4.QSFP-DD is backwards compatible with most QSFP form factors including QSFP 56.
by FS.com on 07/25/2022
My 200G switch ports support 2 x 100G rates and compatibility is consistent, so I chose a 200G to 2 x 100G DAC cable.
by A***g on 07/19/2022
by W***n on 07/05/2022
by T***s on 07/01/2022
We are currently able to do appearance inspection, flow test and compatibility test for 200G QSFP56 and 200G to 2×100G QSFP56 cables. 200G to 8×25G cables can only be inspected for appearance.
by FS.com on 07/02/2022
