As the industry migrated from 40G to 100G, a number of 40G products that have been defined by the industry are still in a vacant state, of which 40G QSFP+ ER4 bears the brunt.
ເມື່ອອຸດສາຫະກໍາເຄື່ອນຍ້າຍຈາກ 40G ໄປ 100G, ຈໍານວນຜະລິດຕະພັນ 40G ທີ່ໄດ້ກໍານົດໂດຍອຸດສາຫະກໍາແມ່ນຍັງຢູ່ໃນສະພາບທີ່ຫວ່າງບໍ່, ເຊິ່ງ 40G QSFP + ER4 ມີຫມວກກັນກະທົບ.