The following analysis examines the inevitability of the resale of used optical modules from three core scenarios, drawing an analogy to the used mobile phone market to help you better understand this phenomenon. The industry-standard Small Form-Factor Pluggable (SFP) Gigabit Interface Converter links switches and routers to the network. The hot-swappable input/output device plugs into a Gigabit Ethernet port or slot. Data Centers: Regularly upgrading and replacing equipment, phasing out outdated. Have excess inventory of Cisco X2, SFP, QSFP or other optical transceiver modules you want to sell? NetEquity. com buys Used and New Cisco optical transceivers, including 1000BASE (Gigabit), 10GBASE (10 Gigabit), 40GBASE (40 Gigabit) and 100GBASE (100) Gigabit network transceiver modules. Contact. SFP modules are not something that are still not common outside of the enterprise and some home labs. Enterprise clients are going to buy them new so that they have a warranty and necessary support. Large inventories of Huawei EOL spare parts JEMSdata, acquired by 1COM in 2007, buys sells and trades network and telecom equipment worldwide in over 50 countries; Huawei Core Network, UMG8900.