A 40G QSFP+ optical transceiver is a compact, hot-pluggable module that combines four 10G lanes into one 40Gbps Ethernet interface. Each channel can: This quad-channel design gives data center switches and routers a higher port density. In today's demanding network environments—from cloud computing disaster recovery to 5G backbone networks —achieving the right balance between high-density short-reach links and robust long-haul transmission is critical. Browse 40G QSFP+ transceivers for data centre, enterprise. QSFP 40G ER4 is a long-reach 40Gbps optical transceiver designed for up to 40km transmission over single-mode fiber, making it a practical choice for data center interconnection, metro links, and enterprise backbone networks that exceed the 10km range of standard 40G optics. These powerful and compact modules enable robust and efficient data transmission, supporting the.