In some cases, old equipments with 100G CFP/10G XENPAK or 10G X2 ports are still deployed, but those transceivers are very rare to purchase in the market now, even there is, but their costs are much more higher than that of 100G QSFP28 or 10G SFP+ with same specification. Then we ACEC provides the solution for such cases. With CFP to QSFP28 adaptor, XENPAK to SFP+ adapter and X2 to SFP+ adapter, your project budget will be highly saved.