Port states in Brocade

Differences between port states, reported when execute the switchshow command (online, offline, no light, not sync, etc...). 
I noticed that sometimes a particular is disable and its state show "no light" and other time its state says "not sync". Why?

Online/In_Sync
Normal operating port with a connected device / ISL to other switch. "Online" is the operating state, "In_Sync" the physical state of the receiver/transmitter. (to see the in_sync you have to issue a portshow, switchshow doesn't display it)
 
No_Module 

no gbic/sfp inserted

No_Light 

gbic/sfp inserted, maybe even cable connected, but receiving no light
Disabled/Offline

If you disable a port (via portdisable) its operating state goes to offline. Fabric OS doesn't check offline ports, this means the physical port state is nt display as whatever it was

 If there was a device previously connected it displays as disabled/in_sync, if there was none it displays as disabled/no_light (or no_module). This physical state is only updated when you enable the port again.
swFCPortPhyState: noCard(1), noGbic(2), laserFault(3), noLight(4), noSync(5), inSync(6), portFault(7), diagFault(8), lockRef(9)
swFCPortOpStatus: unknown(0), online(1), offline(2), testing(3), faulty(4)

Port State in switchshow Description

No_Card No interface card present
No_Module No module (SFP or other) present
No_Light Module not receiving light
No_Sync Module receiving light but out of sync
In_Sync Module receiving light and in sync
Laser_Flt Module signaling a laser fault
Port_Flt Port marked faulty
Diag_Flt Port failed diagnostics
Lock_Ref Locking to the reference signal
Testing Running diagnostics
Online Port is up and running