NEC Neax 2000 IVS2 Manual page 166

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 PLO0
of MP card via the Back Wiring Board, and if the clock signals fail, the clock supply
route takes over to PLO1 automatically. Set SW11-2 and SW11-3 as follows:
BRT0
CONDITIONS
SW
11-2
When one BRT
ON
is provided.
When more
than one BRT ON
is provided.
NOTE 4: When the system is a clock source office, set the SW11-2 and SW11-3 on all the BRT
cards mounted in PIM0 to OFF.
NOTE 5: Mount the BRT card which receives a source clock signals into PIM0.
2
NEAX2000 IVS ISDN System Manual
ND-70919 (E), Issue 1.0
BRT1 BRT2
SW SW SW SW
11-3 11-2 11-3 11-2
ON
ON ON OFF OFF ON
CHAPTER 4 CIRCUIT CARD INFORMATION
---- BRT11
SW SW SW
----
11-3 11-2 11-3
---- OFF ON
PN-2BRTC (BRT)
REMARKS
MP card will receive the clock
signal from No.0 circuit of
BRT0 at its PLO0 input.
If a clock failure occurs with
No. 0 circuit, MP card
switches to No. 1 circuit of
BRT0.
MP card will receive the clock
signal from BRT0 at its PLO0
input, under normal condi-
tions.
If a clock failure occurs with
both No. 0 and No. 1 circuits
of BRT0, MP card switches to
the PLO1 input which gets
clock from BRT1.
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