?Easy to install?It supports real-time configuration, plug and play, hot pluggable sfp footprint. It doesn't require any setup or installation for either device. It greens up immediately and connects right away. When install sfp, please rotate the latch down at a 90 degree to unlock your sfp transceiver. Attention not to look directly into the sfp interface when it's plugged in the network device. ?LR4 vs LR Single Lambda?The difference between 100GBASE-LR4 QSFP28 1310nm 10km and 100GBASE-LR QSFP28 Single Lambda 1310nm 10km is in hardware. The modulation mode of 100GBASE-LR QSFP28 Single Lambda is PAM4, while the 100GBASE-LR4 QSFP28 is non-return-to-zero code (NRZ) modulation. Products using NRZ modulation are mainly used in 4G Ethernet. The PAM4 pattern is 4 times faster than NRZ modulation in transmission. ?Breakout 4x25G?100G-PSM4 QSFP transceiver connects to four individual 25G links terminated with SFP-25G-LR-S using a MTP breakout cable, and as for 25G to 100G network speed upgrade connection, 10 fibers single mode MTP-LC Type B harness cable can be applied. ?100GBASE-PSM4?100G QSFP+ PSM4 transceiver module, 100Gbps, 3.5W Power Consumption, SMF 1310nm, single mode, up to 500m over single mode fiber (SMF) using a wavelength of 1310nm via a MTP/MPO-12 connector, 4XDFB, Four-channel full-duplex, Hot Pluggable and easy to install, support DOM and Host FEC. 0°C to 70°C(32 to 158°F). ?Wide Compatibility?It's fully compliant and compatible for Extreme QSFP28 MSA IEEE 802.3bm 100GBASE-PSM4 standards, coding as Extreme 100G-QSFP28-PSM4.