NEC 2000 IVS manual SW11 Dip SW

				PN-2BRTC (BRI)
			Switch Settings (Continued)
SWITCH NAME		SWITCH	SETTING	FUNCTION	CHECK
		NUMBER	POSITION
SW11 (Dip SW)		1	ON	For normal operation (BRI mode)
ON			OFF	Not used
	1 2 3 4
		2	ON	Output clock signals according to the
				switch setting of SW11-3.
		Note 3
			OFF	Do not output clock signals.
		3	ON	Output clock signals to PLO 0 of MP.
		Note 3	OFF	Output clock signals to PLO 1 of MP.
		4	ON	For normal operation
			OFF	Not used

The figure in the SWITCH NAME column and the position in in the SETTING POSITION column indicate the standard setting of the switch. When the switch is not set as shown by the figure and , the setting of the switch varies with the system concerned.

Note 1: Set the groove on the switch knob to the desired switch position.

Note 2: When the power is on, set the MB switch to ON (UP position) before plugging/unplugging the circuit card.

Note 3: The system can supply clock signals from two clock supply routes.

In normal condition, the system synchronizes to the clock signals supplied on the PLO 0 of MP card via the Back Wiring Board, and if the clock signals are failed, the clock supply route takes over to PLO1 automatically. Set SW11-2 and SW11-3 as follows.

No. of	BRI 0		BRI 1		BRI 2		----	BRI 11
BRI
SW	SW	SW	SW	SW	SW	SW	----	SW	SW	REMARKS
CONDITIONS	11-2 11-3		11-2	11-3	11-2	11-3		11-2	11-3
										The clock signals are supplied to the
When one BRI is										PLO through No. 0 circuit the BRI. If
	ON	ON								the clock supply route of No. 0 circuit
provided.
										is failed, the clock supply route of No.
										1 circuit takes over automatically.
										The system can supply the clock
										signals from BRI 0 or BRI 1. The
When more than										system is synchronized to the BRI 0
one BRI is pro-	ON	ON	ON	OFF	OFF	ON	----	OFF	ON	clock signals normally, and if both
vided.										No. 0 circuit clock supply route and
										No. 1 circuit clock supply route is
										failed, the BRI 1 takes over.
						ND-45504 (E)				CHAPTER 4
					Addendum-001					Page 65-4
						JULY, 1998				Revision 2.1