Single-Homing uses 1 OLT and for example 2 PON ports. 1 PON port is Master the other PON is Slave.
When one of the ports or links fails it automatically enables the other redundant port to continue working. It will not protect against equipment failure.
Dual-Homing uses 2 OLTs one local and one remote. The two OLTs form a virtual device group, and each OLT has a downstream PON port that together forms a primary backup relationship, forming type B protection. Dual-homing can achieve device level and link level fault protection.
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