What is the Cisco QSFP-100G-ER4L-S?
The Cisco QSFP-100G-ER4L-S is a QSFP optical transceiver module, listed by the manufacturer as "100GBASE QSFP Transceiver, 40KM reach over SMF, Duplex LC". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.
