Cisco - QSFP+ transceiver module - 40GbE - 40GBase-LR4 - LC single-mode - up to 10 km - 1271 nm / 1291 nm / 1311 nm / 1331 nm - for ASR 9001, 9006, 9006 with PEM Version 2, 9010, 9010 with PEM Version 2

The Cisco 40GBASE-LR4 QSFP module supports link lengths of up to 10 kilometers over a standard pair of G.652 single-mode fiber with duplex LC connectors. The 40 Gigabit Ethernet signal is carried over four wavelengths. Multiplexing and demultiplexing of the four wavelengths are managed within the device.