CHAPTER 3 LAMP INDICATIONS AND SWITCH SETTINGS
PN-2BRTK (BRT)
NEAX2000 IVS
2
Installation Procedure Manual
Page 284
ND-70928 (E), Issue 3.0
NOTE 3: The system can receive clock signals from two clock supply routes.
In normal conditions, 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 fail, the clock supply
route takes over to PLO1 automatically. Set SW11-2 and SW11-3 as follows.
NOTE 4: When the system is a clock source office, set the SW11-2 and SW11-3 on all the BRT
cards mounted in PIM 0 to “OFF”.
NOTE 5: Mount the BRT card which receives source clock signals into PIM 0.
CONDITIONS
BRT0
BRT1
BRT2
----
BRT23
REMARKS
SW
11-2
SW
11-3
SW
11-2
SW
11-3
SW
11-2
SW
11-3
----
SW
11-2
SW
11-3
When one BRT
is provided.
ON
ON
MP card will receive the clock
signal from No. 0 circuit of
BRT 0 at its PLO 0 input.
Should a clock failure occure
with No. 0 circuit, MP card will
switch to No. 1 circuit of BRT
0.
When more
than one BRT
is provided.
ON
ON
ON
OFF OFF
ON
----
OFF
ON
MP card will receive the clock
signal from BRT 0 at its PLO
0 input, under normal
conditions.
Should a clock failure occur
with both No. 0 and No. 1
circuits of BRT 0, MP card will
switch to the PLO 1 input
which gets clock from BRT 1.
