400G VR4 modules are ideal for intra-data center connections where high-bandwidth, short-range links are necessary. Features: Transmission Distance: With a maximum transmission distance of 100 meters (on OM4 fiber). This guide explains the differences between 400G QSFP-DD SR8, DR4, FR4, and LR4 transceivers, including transmission distance, fiber type, connector type, deployment scenarios, and how to choose the right module for your network. The ability of 400G optical modules to deliver high data rates over varying reaches is enabled by a suite of advanced. 400 Gigabit Ethernet (400G) transceivers are optical modules capable of handling data rates of 400 Gbps. Juniper's 400G transceivers use the QSFP-DD form factor. 400G. A 400G ZR+ module is a high-performance coherent pluggable transceiver designed to transmit 400Gbps Ethernet signals across metro, regional, and extended long-haul fiber links far beyond the standard reach of basic 400ZR optics. In this context, increasing the data rate per lane is.