We are looking for a cable to connect Cisco N9K-C93180YC-EX and Mellanox 4421/4121A-ACAT cards. The 100G QSFP28 to 4x25G SFP28 DAC breakout cables we finally got were priced very competitively and worked exactly as intended. Considering that there will be the needs to work these cables on other switches like Mellanox SN2700/SN2100, Cisco, Arista, Juniper, etc that can do the 100G QSFP or 25G QSFP connections, we turn to the FS box which we have been eyeing for some time now. The AM has helped confirm that it can do the coding of the 100G QSFP28 side of the breakout DAC cable. With it, the 100G side of the 100 to 4x25G DAC cable is able to go to any switch. Would like to share more about the use of FS box (maybe an UNBOXING video on YouTube) later on.