The SONET state dictionary visuals

In these tables, the symbolic name “ Link State Symbol ” that appears after each primary state name corresponds to the last part of the variable name holding the state. For example, the “ActiveProtecting” state, which has ActiveProtecting for symbol, has the variable ActiveProtecting associated with it in the library.

Graphical representation of SONET primary states
Link State Link State Symbol	Link Base
Disabled Disabled
Inactive Inactive
Active Active
Active and protecting ActiveProtecting
Troubled and protected TroubledProtected
Troubled and unprotected TroubledUnprotected

Common pairs of SONET primary states
Link State Link State Symbols	Link Base
Disabled in both directions Disabled Disabled
Disabled in one direction, active in the other direction Disabled Active
Inactive in both directions Inactive Inactive
Inactive in one direction, active in the other direction Inactive Active
Active in both directions Active Active
Troubled and protected in one direction, active in the other direction TroubledProtected Active
Active and protecting in both directions ActiveProtecting ActiveProtecting
Active and protecting in one direction, inactive in the other direction ActiveProtecting Inactive
Troubled and protected in both directions TroubledProtected TroubledProtected
Troubled and protected in one direction, inactive in the other direction TroubledProtected Inactive
Troubled and protected in one direction, troubled and unprotected in the other direction TroubledProtected TroubledUnprotected
Troubled and unprotected in both directions TroubledUnprotected TroubledUnprotected
Troubled and unprotected in one direction, active in the other direction TroubledUnprotected Active

In Icon-based representations of SONET secondary states, the symbolic name “ Secondary State Definition ” that appears after each “Secondary State Name” corresponds to the static secondary state definition. For example, the “Manual Switch” secondary state is defined by ManualSwitch, which corresponds to the static definition ManualSwitch.

It is possible to change the icon associated with a secondary state by using global settings, see Using global settings. The icon property name to be used with IltSettings.SetValue() must only include the secondary state definition. For example:

Icon-based representations of SONET secondary states
Secondary State Name Secondary State Definition	Icon	Comment
Exercisor Exercisor		Facility is currently undergoing test.
Forced switch ForcedSwitch		Forced protection switch request has been triggered.
Locked Locked		No traffic is allowed on the facility. This restriction may be imposed for maintenance reasons.
Manual switch ManualSwitch		Manual protection switch request has been triggered.
Pending Pending		Pending protection switch request.
Wait-to-restore WaitToRestore		Waiting for the facility service to be restored.