What is the Finisar FWLF-1631-39?
The Finisar FWLF-1631-39 is a SFP optical transceiver module, listed by the manufacturer as "Fiber Optic Transceiver Module General Data Transfer 2.7Gbps 1546nm 3.3V Pluggable, SFP". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.