Transition Networks SGPAT10xx-x05 PoE+ Converter User Guide
33719 Rev. C https://www.transition.com Page 21 of 49
period is needed for the PHY to return to full operation. The default wake times are set to 17 microseconds for
1000Base and 30 microseconds for 100Base. During this wakeup time the packet will continue to buffer in the
egress queue until the wake up timer has completed at this point port traffic will begin to flow as normal.
The SGPAT can also support a reduced power mode for 10Base-T in which it modifies the copper media transmit
waveform to achieve power consumption savings.
3-Port and 4-Port Operation (Redundant Fiber mode, Revertive mode, Port Isolation)
Multiport SGPAT versions provide 3-port or 4-port switch functionality or provide redundant fiber links, with a
switchover (failover) time of less than 50 milliseconds. In Revertive mode, after the failed link is recovered, it
becomes the active link again (reverts back to the original link). In Non-revertive mode, after the failed link is
recovered, the failed link does not become active again until the currently active link fails.
3-Port Model (SGPAT1040-205)
The 3-port model can be configured as a 3-port switch or as a 2-port media converter with redundant fiber links.
The 3-Port model (SGPAT1040-205) operates in 3-Port Switch mode and in Redundant Fiber mode as described
below.
3-Port Switch Mode
In 3-Port Switch mode, the SGPAT1040-205 functions as a 3-port switch with one copper RJ45 port and two fiber
ports.
3-Port Redundant Fiber Mode
The SGPAT1040-205 can be configured as a 2-port media converter with redundant fiber links. The figure below
shows a 3-port SGPAT1040-205 configured as a 2-port Media Converter with redundant fiber links.
3-Port Redundant Fiber Mode Example
Port Isolation: the 3-Port SGPAT1040-205 supports Port Isolation. This function disables the data paths between
ports, but allows the ports to be able to individually communicate with the Active SFP port.
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