Juniper EX-SFP-1GE-SX. SFP transceiver type: Fiber optic, Maximum data transfer rate: 1000 Mbit/s, Interface type: SFP. Compatible products: Juniper EX4200, Certification: MSAThis is an optional uplink module for EX4200 switches support SFP, SFP+, or XFP transceivers. The Gigabit Ethernet SFP, SFP+, or XFP transceivers installed in EX4200 switches support digital optical monitoring (DOM).Use only optical transceivers and optical connectors purchased from Juniper Networks for your EX Series switches.