| Description | This object is used to control the switchover
of protected channels.
'unlock (1)' : Transition state to unlock. A channel
which is in lock state has to be
brought to 'unlock (1)' state for it to
be available for switchover.
Whether a switchover to a channel is
allowed or not is dependent on both
vismChanActivityState and vismChanLockingState.
A switchover is allowed if its
vismChanActivityState is standby and its
vismChanLockingState is unlock.
Changing the vismChanLockingState to unlock does
not cause a change in the vismChanActivityState.
A channel which is in unlock state may carry
traffic depending on its activity state (active
or standby).
'lock (2)' : Transition state to 'lock (2)'. If the activity
state is active, it transitions to standby
and a switchover occurs to another channel
which is standby and 'unlocked (1)'.
When a channel is in 'lock (2)' state,
switchover to this channel is not allowed.
A channel which is in 'lock (2)' state, is
always in either standby or failed state.
Hence it will not carry any traffic.
Switchover to a channel which is in
'lock (2)' state is not allowed.
This object can be set to 'locked (2)' to force a
switchover and/or to perform maintenance operations
related to that channel.
A channel that is 'unprotected' will always be in
'unlock (1)' state. It can not be set to 'lock (2)'
state. |