Interlogix NS3702-24P-4S User Manual - Manual (Page 144)

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 Disabled – the port only responds to network management messages and must return to the blocking state first
A port transitions from one state to another as follows:
 From initialization (switch boot) to blocking
 From blocking to listening or to disabled
 From listening to learning or to disabled
 From learning to forwarding or to disabled
 From forwarding to disabled
 From disabled to blocking
Figure 4-7-1: STP Port State Transitions
You can modify each port state by using management software. When you enable STP, every port on every switch in the network
goes through the blocking state and then transitions through the states of listening and learning at power up. If properly configured,
each port stabilizes to the forwarding or blocking state. No packets (except BPDUs) are forwarded from, or received by, STP
enabled ports until the forwarding state is enabled for that port.
2. STP Parameters