NEC SV8500 Operation And Maintenance Manual - page 655
of
975
– 608 –
CHAPTER 5
Operation Procedure for System with PIR
3.2.3
Trunk (ORT, SND, CFT) Fault
Note:
If a circuit card is replaced because only one line is faulty, no other lines in that circuit card can be used
until the replacement is complete.
(1) When only one line is faulty.
(a) Place the faulty line into make-busy state.
•
For ORT/SND, set MB switch of each circuit to ON position.
•
For CFT, place it into make-busy state using the MBTK command.
(2) Replace the circuit card with a spare.
(a) Set MB switch UP and extract the circuit card from its mounting slot.
(b) Set MB switch of the new circuit card UP and insert the circuit card into its mounting slot.
(c) Set MB switch DOWN.
(d) If the line is under make-busy state, cancel it.