NEC ND-71762(E) system manual ⋅ Normal Fault Clock Down, etc Normal or Faulty

GENERAL INFORMATION FOR CCIS

Table 2-5 Algorithm of Changeover of Input Clocks from DTI

SELECTED	EACH ROUTE INPUT CLOCK STATUS (Note)				ROUTE TO BE
ROUTE BEFORE					SELECTED AFTER	REMARKS
CHANGEOVER	ROUTE 0	ROUTE 1	ROUTE 2	ROUTE 3	CHANGEOVER
	—	⋅	*	*	Route 1
Route 0	—	—	⋅	*	Route 2
	—	—	—	⋅	Route 3
	—	—	—	—	PLO/TSW Self Running
	⋅	*	*	*	Route 0
Route 1	—	—	⋅	*	Route 2
	—	—	—	⋅	Route 3
	—	—	—	—	PLO/TSW Self Running
	⋅	*	*	*	Route 0
Route 2	—	⋅	*	*	Route 1
	—	—	—	⋅	Route 3
	—	—	—	—	PLO/TSW Self Running
	⋅	*	*	*	Route 0
Route 3	—	⋅	*	*	Route 1
	—	—	⋅	*	Route 2
	—	—	—	—	PLO/TSW Self Running

Note: Priority order is Route 0, 1, 2, and 3 in an ascending order.

⋅: Normal

— :		Fault (Clock Down, etc.)
*	:	Normal or Faulty
•	When power for the PLO/TSW is turned on, Route 0 is selected.

CHAPTER 2 ND-71762 (E)

Page 24

Issue 2