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16 UnityOne Modular Fiber/Copper ZPHA Installation Guide V 2.1
This configuration places a cross-over connection between the two connected devices upon failure,
ensuring the connection remains continuous. Without the cross-over connection between the two
devices, it disrupts because the ZPHA is completely passive, only passing signal from pin to pin. See
Figure 2 - 12, “
ZPHA Cross-over Configuration 3 and Figure 2 - 13, “ZPHA Cross-over Configuration 4.
Figure 2 - 12: ZPHA Cross-over Configuration 3