The Telestream SPG9000-SFP-1GESR is a Gigabit Ethernet Transceiver SFP Module, Short Reach, 850 nm designed for the SPG9000 timing and reference generator (items sold separately).
With option SPG9000-PTP (sold separately), the PTP 1 and PTP 2 ports are enabled. Each port corresponds to an independent PTP instance. Two SFP+ slots are provided for use with SFP modules like this one that can operate at 10 Gbps or 1 Gbps line speed depending on the SFP type.