What is the Cisco QSFP-100G-LR4-S.?
The Cisco QSFP-100G-LR4-S. is a QSFP optical transceiver module, listed by the manufacturer as "Cisco 100GBASE LR4 QSFP Transceiver, LC, 10km over SMF For Optical Network, Data Networking 1 LC Duplex 100GBase-LR4 NetworkOptical Fiber Single-mode100 Gigabit Ethernet100GBase-LR4Hot-swappable". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
