The Juniper Networks JNP-QSFP-40G-LX4 Compatible QSFP+ 40GBASE-LX4 1310nm 2km DOM Duplex LC/UPC SMF/MMF Optical Transceiver Module is equipped with LC duplex connectors, reaching a link up to 2km over OS2 single-mode fiber (SMF). MVSLINK manufactured Cisco WSP-Q40GLR4L compatible QSFP+ module is compliant with QSFP+ MSA standard. Besides, this module has been tested on host devices to ensure full compatibility with Cisco switches. The third-party 40G QSFP module is an ideal substitute for the OEM QSFP 40G transceiver at an affordable price, providing a cost-effective compatible solution for high-performance 40G Ethernet connectivity.