NEC Univerge SV8500 Operation And Maintenance Manual page 709

Figure 5-29 Recovery Procedure From Lockout Station (2 of 2)
A
RLST command
(Confirm: DT)
Hear DT?
NO
Replace 16LC card
with a spare.
COMMAND
RLST Release Station/Trunk
CHAPTER 5
Forcibly release the lockout station circuit.
Go off-hook again and confirm DT.
YES
Circuit may be faulty temporarily.
Observe situation for a while.
COMMAND FULL NAME
– 662 –
Operation Procedure for System with PIR